�����JFIF��XX����������    $.' ",#(7),01444'9=82<.342  2!!22222222222222222222222222222222222222222222222222�����"����4���������������������������� ���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������,�PG"Z_�4�˷����kjز�Z�,F+��_z�,�© �����zh6�٨�ic�fu������������������������������������#ډb���_�N��?�����������wQ���5-�~�I���8���������������������������������TK<5o�Iv-������������������k�_U_������������������������������~b�M��d��������Ӝ�U�Hh��?]��E�w��Q���k�{��_}qFW7HTՑ��Y��F�����?_�'ϔ��_�Ջt������������������������=||I �����6�έ"�����D���/[�k�9����Y�8������ds|\���Ҿp6�Ҵ���]��.����6���z<�v��@]�i%������������������������$j��~����g��J>��no����pM[me�i$[�����������s�o�ᘨ�˸ nɜG-�ĨU�ycP���3.DB�li�;���������������������hj���x����7Z^�N�h��������N3u{�:j�����x�힞��#M��&��jL P@��_���� P�������������������&��o8��������9������@Sz���6�t7#O�ߋ �����s}Yf�T������lmr����Z)'N��k�۞p�����w\�T���������������ȯ?�8`���O��i{wﭹW�[�r�� ��Q4F�׊������3m&L�=��h3�������z~��#����\�l :�F,j@�� ʱ�wQT����8�"kJO����6�֚l������������������}����R�>ډK���]��y����&����p�}b������;N�1�m�r$����|��7�>e�@���B�TM*-i�H��g�D�)� E�m�|�ؘbҗ�a���Ҿ����������������t4�����o���G��*oCN�rP���Q��@z,|?W[0���������:�n,j���WiE��W������$~/�hp\��?��{(�0���+�Y8rΟ�+����>S-S���������������VN;���}�s?.����� w��9��˟<���Mq4�Wv'������{)0�1mB����V����W[��������8�/<� �%���wT^�5���b��)iM� p�g�N�&ݝ������������VO~��q���u���9��� ����!��J27�����$����O-���! �:���%H��� ـ�������y�ΠM=t{!S�� �oK8�������t<����è��������:a��������[������ա�H���~��w��Qz`�p����o�^ ������Q��n����� �,uu�C��$ ^���,�������8�#��:�6��e�|~�����������!�3��3.�\0�����q��o�4`.|� ����y�Q�`~;�d�ׯ,��O�Zw�������`73�v�܋�<�����Ȏ�� ـ4k��5�K�a�u�=9Yd��$>x�A�&�� j0� ���vF��� Y���|�y��� ~�6�@c��1vOp��������Ig�����4��l�OD�����L����� R���c���j�_�uX�6��3?nk��Wy�f;^*B� ��@���~a�`��Eu�������+�����6�L��.ü>��}y���}_�O�6�͐�:�Yr���G�X��kG������l^w����������~㒶sy���Iu�!���� W ��X��N�7BV��O��!X�2����wvG�R�f�T#�����t�/?���%8�^�W�aT����G�cL�M���I��(J����1~�8�?aT ���]����AS�E��(��*E}� 2������#I/�׍qz��^t�̔���������b�Yz4x����t�){ OH�����+(E��A&�N�������XT��o��"�XC����'���)}�J�z�p� ����~5�}�^����+�6����w��c��Q�|�Lp�d�H��}�(�.|����k��c4^�����"�����Z?ȕ ��a<�������L�!0�39C� �Eu�����C�F�Ew�ç ;�n?�*o���B�8�bʝ���'#Rqf����M}7����]�������s2tcS{�\icTx;�\��7K���P������ʇ Z O-��~�������c>"��?��������P�����E��O�8��@�8��G��Q�g�a�Վ���󁶠��䧘��_%#r�>�����1�z�a���eb��qcP��ѵ��n���#L��� =��׀t� L�7�`�����V����A{�C:�g���e@�����w1 Xp�3�c3�ġ�������p��M"'-�@n4���fG���B3�DJ�8[Jo�ߐ���gK)ƛ��$���� �������8�3�����+���� �����6�ʻ���� ���S�kI�*KZlT _`�������?��K�����QK�d���������B`�s}�>���`������*�>��,*@J�d�oF*�����弝��O}�k��s��]��y�ߘ�������c1G�V���<=�7��7����6��q�PT��tXԀ�!9*4�4Tހ���3XΛex�46�������Y��D ����� ����BdemDa����\�_l,����G�/���֌7���Y�](�xTt^%�GE�����4�}bT����ڹ�����;��Y)���B�Q��u��>J/J ���⮶.�XԄ��j�ݳ������+E��d ���r�5�_D�����1 ���o�� �B�x�΢�#����<��W�����8���R6�@���g�M�.��� dr�D��>(otU��@�x=��~v���2� ӣ�d�oBd�����3�eO�6�㣷����������ݜ�6��6Y��Qz`����S��{���\P��~z m5{J/L��1������<�e�ͅPu���b�]�ϔ��������'�������f�b� Zpw��c`"��i���BD@:)ִ�:�]��h���v�E��w���T�l�������P����"Ju�}��وV ��J��G6��. J/�Qgl߭�e�����@�z�Zev2u����)]կ���������7x�������s�M�-<ɯ�c��r��v�����@��$�ޮ}lk���a����'����>x��O\�Z������Fu>������ck#��&:��`�$��ai�>2Δ����l���oF[h�������lE�ܺ�Π���k:)���`������� $[6�����9�����kOw�\|�����8}������ބ:��񶐕��������I�A1/���=�2[�,�!��.}gN#�u����b���� ~���������݊��}34q�����d�E��L��������c��$���"�[q�U�硬g^��%B ��z���r�p�������J�ru%v\h�����1Y�ne`������ǥ:g����pQM~�^��Xi� ��`S�:V2������9.�P���V������?B�k�� ��������AEvw%�_�9C�Q����wKekP�ؠ�\������;Io d�{ ߞo�c1eP�����\� `����E=���@K<�Y��������eڼ�J����w����{av�F�'�M�@��������������/J��+9p����|]���������Iw &`���8���&�M�hg���[�{�������Xj���%��Ӓ�������������������$��(�����ʹN�������<>�I���RY�����K2�NPlL�ɀ�)��&e��������B+ь����(������������������� � �JTx����_?EZ� }@���� 6�U���뙢ط�z��dWI��n` D����噥�[��uV��"�G&�����Ú����2�g�}&m���������������������?ċ���"����Om#�������������������������� ��{���������������������ON��"S�X���Ne��ysQ���@�������������Fn��Vg�����dX�~nj����������������������]J�<�K]:����FW���b�������62����������=��5f����JKw����bf�X������������������������55��~J �%^�������:�-�QIE��P��v�nZum� z � ~ə ���� ���ة����;�f��\v�������g�8�1��f2�������������������������4;�V���ǔ�)�������������������9���1\������������������������������c��v�/'Ƞ�w������������������$�4�R-��t����������������������������������� e�6�/�ġ �̕Ecy�J���u�B���<�W�ַ~�w[B1L۲�-JS΂�{���΃�������������������������������������������A��20�c#���������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������������@���� 0!1@AP"#2Q`$3V�%45a6�FRUq����� ������^7ׅ,$n��������+��F�`��2X'��0vM��p�L=�������5��8������u�p~���.�`r�����\����O��,ư�0oS ��_�M�����l���4�kv\JSd���x���SW�<��Ae�IX����������$I���w�:S���y���›R��9�Q[���,�5�;�@]�%���u�@ *ro�lbI �� ��+���%m:�͇ZV�����u�̉����θau<�fc�.����{�4Ա� �Q����*�Sm��8\ujqs]{kN���)qO�y�_*dJ�b�7���yQqI&9�ԌK!�M}�R�;�������S�T���1���i[U�ɵz�]��U)V�S6���3$K{��ߊ<�(� E]Զ[ǼENg�����'�\?#)Dkf��J���o��v���'�%ƞ�&K�u��!��b�35LX�Ϸ��63$K�a�;�9>,R��W��3�3� d�JeTYE.Mϧ��-�o�j3+y��y^�c�������VO�9NV\nd�1 ��!͕_)a�v;����թ�M�lWR1��)El��P;��yوÏ�u 3�k�5Pr6<�⒲l�!˞*��u־�n�!�l:����UNW ��%��Chx8vL'��X�@��*��)���̮��ˍ��� ����D-M�+J�U�kvK����+�x8��cY������?�Ԡ��~3mo��|�u@[XeY�C�\Kp�x8�oC�C�&����N�~3-H���� ��MX�s�u<`���~"WL��$8ξ��3���a�)|:@�m�\���^�`�@ҷ)�5p+��6���p�%i)P M���ngc�����#0Aruz���RL+xSS?���ʮ}()#�t��mˇ!��0}}y����<�e� �-ή�Ԩ��X������ MF���ԙ~l L.3���}�V뽺�v������멬��Nl�)�2����^�Iq��a��M��qG��T�����c3#������3U�Ǎ���}��לS�|qa��ڃ�+���-��2�f����/��bz��ڐ�� �ݼ[2�ç����k�X�2�* �Z�d���J�G����M*9W���s{��w���T��x��y,�in�O�v��]���n����P�$��JB@=4�OTI�n��e�22a\����q�d���%�$��(���:���: /*�K[PR�fr\nڙdN���F�n�$�4��[�� U�zƶ����� �mʋ���,�ao�u 3�z� �x��Kn����\[��VFmbE;�_U��&V�Gg�]L�۪&#n%�$ɯ��dG���D�TI=�%+AB�Ru#��b4�1�»x�cs�YzڙJG��f��Il���d�eF'T� iA��T���uC�$����Y��H?����[!G`}���ͪ� �纤Hv\������j�Ex�K���!���OiƸ�Yj�+u-<���'q����uN�*�r\��+�]���<�wOZ.fp�ێ��,-*)V?j-kÊ#�`�r��dV����(�ݽBk�����G�ƛk�QmUڗe��Z���f}|����8�8��a���i��3'J�����~G_�^���d�8w������ R�`(�~�.��u���l�s+g�bv���W���lGc}��u���afE~1�Ue������Z�0�8�=e�� f@/�jqEKQQ�J���oN��J���W5~M>$6�Lt�;$ʳ{���^��6�{����v6���ķܰg�V�cnn �~z�x�«�,2�u�?cE+Ș�H؎�%�Za�)���X>uW�Tz�Nyo����s���FQƤ��$��*�&�LLXL)�1�" L��eO��ɟ�9=���:t��Z���c��Ž���Y?�ӭV�wv�~,Y��r�ۗ�|�y��GaF�����C�����.�+� ���v1���fήJ�����]�S��T��B��n5sW}y�$��~z�'�c ��8 ��� ,! �p��VN�S��N�N�q��y8z˱�A��4��*��'������2n<�s���^ǧ˭P�Jޮɏ�U�G�L�J�*#��<�V��t7�8����TĜ>��i}K%,���)[��z�21z ?�N�i�n1?T�I�R#��m-�����������������1����lA�`��fT5+��ܐ�c�q՝��ʐ��,���3�f2U�եmab��#ŠdQ�y>\��)�SLY����w#��.���ʑ�f��� ,"+�w�~�N�'�c�O�3F�������N<���)j��&��,-� �љ���֊�_�zS���TǦ����w�>��?�������n��U仆�V���e�����0���$�C�d���rP �m�׈e�Xm�Vu� �L��.�bֹ��� �[Դaզ���*��\y�8�Է:�Ez\�0�Kq�C b��̘��cө���Q��=0Y��s�N��S.����3.���O�o:���#���v7�[#߫ ��5�܎�L���Er4���9n��COWlG�^��0k�%<���ZB���aB_���������'=��{i�v�l�$�uC���mƎҝ{�c㱼�y]���W�i ��ߧc��m�H� m�"�"�����;Y�ߝ�Z�Ǔ�����:S#��|}�y�,/k�Ld� TA�(�AI$+I3��;Y*���Z��}|��ӧO��d�v��..#:n��f>�>���ȶI�TX��� 8��y����"d�R�|�)0���=���n4��6ⲑ�+��r<�O�܂~zh�z����7ܓ�HH�Ga롏���nCo�>������a ���~]���R���̲c?�6(�q�;5%� |�uj�~z8R�=X��I�V=�|{v�Gj\gc��q����z�؋%M�ߍ����1y��#��@f^���^�>N������#x#۹��6�Y~�?�dfPO��{��P�4��V��u1E1J �*|���%����JN��`eWu�zk M6���q t[�� ��g�G���v��WIG��u_ft����5�j�"�Y�:T��ɐ���*�;� e5���4����q$C��2d�}���� _S�L#m�Yp��O�.�C�;��c����Hi#֩%+) �Ӎ��ƲV���SYź��g |���tj��3�8���r|���V��1#;.SQ�A[���S������#���`n�+���$��$�I �P\[�@�s��(�ED�z���P��])8�G#��0B��[ى��X�II�q<��9�~[Z멜�Z�⊔IWU&A>�P~�#��dp<�?����7���c��'~���5 ��+$���lx@�M�dm��n<=e�dyX��?{�|Aef ,|n3�<~z�ƃ�uۧ�����P��Y,�ӥQ�*g�#먙R�\���;T��i,��[9Qi歉����c>]9�� ��"�c��P�� �Md?٥��If�ت�u��k��/����F��9�c*9��Ǎ:�ØF���z�n*�@|I�ށ9����N3{'��[�'ͬ�Ҳ4��#}��!�V� Fu��,�,mTIk���v C�7v���B�6k�T9��1�*l� '~��ƞF��lU��'�M ����][ΩũJ_�{�i�I�n��$����L�� j��O�dx�����kza۪��#�E��Cl����x˘�o�����V���ɞ�ljr��)�/,�߬h�L��#��^��L�ф�,íMƁe�̩�NB�L�����iL����q�}��(��q��6IçJ$�W�E$��:������=#����(�K�B����zђ <��K(�N�۫K�w��^O{!����)��H���>x�������lx�?>Պ�+�>�W���,Ly!_�D���Ō�l���Q�!�[ �S����J��1��Ɛ�Y}��b,+�Lo�x�ɓ)����=�y�oh�@�꥟/��I��ѭ=��P�y9��� �ۍYӘ�e+�p�Jnϱ?V\SO%�(�t� ���=?MR�[Ș�����d�/ ��n�l��B�7j� ��!�;ӥ�/�[-���A�>��dN�sLj ��,ɪv��=1c�.SQ�O3�U���ƀ�ܽ�E����������̻��9G�ϷD�7(�}��Ävӌ\��y�_0[w ���<΍>����a_��[0+�L��F.�޺��f�>oN�T����q;���y\��bՃ��y�jH�<|q-eɏ�_?_9+P���Hp$�����[ux�K w�Mw��N�ی'$Y2�=��q���KB��P��~�������Yul:�[<����F1�2�O���5=d����]Y�sw:���Ϯ���E��j,_Q��X��z`H1,#II ��d�wr��P˂@�ZJV����y$�\y�{}��^~���[:N����ߌ�U�������O��d�����ؾe��${p>G��3c���Ė�lʌ�� ת��[��`ϱ�-W����dg�I��ig2��� ��}s ��ؤ(%#sS@���~���3�X�nRG�~\jc3�v��ӍL��M[JB�T��s3}��j�Nʖ��W����;7���ç?=X�F=-�=����q�ߚ���#���='�c��7���ڑW�I(O+=:uxq�������������e2�zi+�kuG�R��������0�&e�n���iT^J����~\jy���p'dtG��s����O��3����9* �b#Ɋ�� p������[Bws�T�>d4�ۧs���nv�n���U���_�~,�v����ƜJ1��s�� �QIz���)�(lv8M���U=�;����56��G���s#�K���MP�=��LvyGd��}�VwWBF�'�à �?MH�U�g2�� ����!�p�7Q��j��ڴ����=��j�u��� Jn�A s���uM������e��Ɔ�Ҕ�!)�'��8Ϣ�ٔ���ޝ(��Vp���צ֖d=�IC�J�Ǡ{q������kԭ�߸���i��@K����u�|�p=..�*+����x�����z[Aqġ#s2a�Ɗ���RR�)*HRsi�~�a &f��M��P����-K�L@��Z��Xy�'x�{}��Zm+���:�)�) IJ�-i�u���� ���ܒH��'��L(7�y�GӜq���� j��� 6ߌg1�g�o���,kر���tY�?W,���p���e���f�OQS��!K�۟cҒA�|ս�j�>��=⬒��˧L[�� �߿2JaB~R��u�:��Q�] �0H~���]�7��Ƽ�I���(�}��cq '�ήET���q�?f�ab���ӥvr� �)o��-Q��_'����ᴎo��K������;��V���o��%���~OK ����*��b�f:���-ťIR��`B�5!RB@���ï�� �u �̯e\�_U�_������� g�ES��3��������QT��a�����x����U<~�c?�*�#]�MW,[8O�a�x��]�1bC|踤�P��lw5V%�)�{t�<��d��5���0i�XSU��m:��Z�┵�i�"��1�^B�-��P�hJ��&)O��*�D��c�W��vM��)����}���P��ܗ-q����\mmζZ-l@�}��a��E�6��F�@��&Sg@���ݚ�M����� ȹ 4����#p�\H����dYDo�H���"��\��..R�B�H�z_�/5˘����6��KhJR��P�mƶi�m���3��,#c�co��q�a)*P�t����R�m�k�7x�D�E�\Y�閣_X�<���~�)���c[[�BP����6�Yq���S��0����%_����;��Àv�~�| VS؇ ��'O0��F0��\���U�-�d@�����7�SJ*z��3n��y��P����O����������m�~�P�3|Y��ʉr#�C�<�G~�.,! ���bqx���h~0=��!ǫ�jy����l��O,�[B��~��|9��ٱ����Xly�#�i�B��g%�S��������tˋ���e���ې��\[d�t)��.+u�|1 ������#�~Oj����hS�%��i.�~X���I�H�m��0n���c�1uE�q��cF�RF�o���7� �O�ꮧ� ���ۛ{��ʛi5�rw?׌#Qn�TW��~?y$��m\�\o����%W� ?=>S�N@�� �Ʈ���R����N�)�r"C�:��:����� �����#��qb��Y�. �6[��2K����2u�Ǧ�HYR��Q�MV��� �G�$��Q+.>�����nNH��q�^��� ����q��mM��V��D�+�-�#*�U�̒ ���p욳��u:�������IB���m����PV@O���r[b= �� ��1U�E��_Nm�yKbN�O���U�}�the�`�|6֮P>�\2�P�V���I�D�i�P�O;�9�r�mAHG�W�S]��J*�_�G��+kP�2����Ka�Z���H�'K�x�W�MZ%�O�YD�Rc+o��?�q��Ghm��d�S�oh�\�D�|:W������UA�Qc yT�q��������~^�H��/��#p�CZ���T�I�1�ӏT����4��"�ČZ�����}��`w�#�*,ʹ�� ��0�i��課�Om�*�da��^gJ݅{���l�e9uF#T�ֲ��̲�ٞC"�q���ߍ ոޑ�o#�XZTp����@ o�8��(jd��xw�]�,f���`~��|,s��^����f�1���t��|��m�򸄭/ctr��5s��7�9Q�4�H1꠲BB@�l9@���C�����+�wp�xu�£Yc�9��?`@#�o�mH�s2��)�=��2�.�l����jg�9$�Y�S�%*L������R�Y������7Z���,*=�䷘$�������arm�o�ϰ���UW.|�r�uf����IGw�t����Zwo��~5 ��YյhO+=8fF�)�W�7�L9lM�̘·Y���֘YLf�큹�pRF���99.A �"wz��=E\Z���'a� 2��Ǚ�#;�'}�G���*��l��^"q��+2FQ� hj��kŦ��${���ޮ-�T�٭cf�|�3#~�RJ����t��$b�(R��(����r���dx� >U b�&9,>���%E\� Ά�e�$��'�q't��*�א���ެ�b��-|d���SB�O�O��$�R+�H�)�܎�K��1m`;�J�2�Y~9��O�g8=vqD`K[�F)k�[���1m޼c��n���]s�k�z$@��)!I �x՝"v��9=�ZA=`Ɠi �:�E��)`�7��vI��}d�YI�_ �o�:ob���o ���3Q��&D&�2=�� �Ά��;>�h����y.*ⅥS������Ӭ�+q&����j|UƧ�����}���J0��WW< ۋS�)jQR�j���Ư��rN)�Gű�4Ѷ(�S)Ǣ�8��i��W52���No˓� ۍ%�5brOn�L�;�n��\G����=�^U�dI���8$�&���h��'���+�(������cȁ߫k�l��S^���cƗjԌE�ꭔ��gF���Ȓ��@���}O���*;e�v�WV���YJ\�]X'5��ղ�k�F��b 6R�o՜m��i N�i�����>J����?��lPm�U��}>_Z&�KK��q�r��I�D�Չ~�q�3fL�:S�e>���E���-G���{L�6p�e,8��������QI��h��a�Xa��U�A'���ʂ���s�+טIjP�-��y�8ۈZ?J$��W�P� ��R�s�]��|�l(�ԓ��sƊi��o(��S0���Y� 8�T97.�����WiL��c�~�dxc�E|�2!�X�K�Ƙਫ਼�$((�6�~|d9u+�qd�^3�89��Y�6L�.I�����?���iI�q���9�)O/뚅����O���X��X�V��ZF[�یgQ�L��K1���RҖr@v�#��X�l��F���Нy�S�8�7�kF!A��sM���^rkp�jP�DyS$N���q���nxҍ!U�f�!eh�i�2�m����`�Y�I�9r�6� �TF���C}/�y�^���Η���5d�'��9A-��J��>{�_l+�`��A���[�'��յ�ϛ#w:݅�%��X�}�&�PSt�Q�"�-��\縵�/����$Ɨh�Xb�*�y��BS����;W�ջ_mc�����vt?2}1�;qS�d�d~u:2k5�2�R�~�z+|HE!)�Ǟl��7`��0�<�,�2*���Hl-��x�^����'_TV�gZA�'j� ^�2Ϊ��N7t�����?w�� �x1��f��Iz�C-Ȗ��K�^q�;���-W�DvT�7��8�Z�������� hK�(P:��Q- �8�n�Z���܃e貾�<�1�YT<�,�����"�6{�/ �?�͟��|1�:�#g��W�>$����d��J��d�B���=��jf[��%rE^��il:��B���x���Sּ�1հ��,�=��*�7 fcG��#q� �eh?��2�7�����,�!7x��6�n�LC�4x��},Geǝ�tC.��vS �F�43��zz\��;QYC,6����~;RYS/6���|2���5���v��T��i����������mlv��������&� �nRh^ejR�LG�f���? �ۉҬܦƩ��|��Ȱ����>3����!v��i�ʯ�>�v��オ�X3e���_1z�Kȗ\<������!�8���V��]��?b�k41�Re��T�q��mz��TiOʦ�Z��Xq���L������q"+���2ۨ��8}�&N7XU7Ap�d�X��~�׿��&4e�o�F��� �H�����O���č�c�� 懴�6���͉��+)��v;j��ݷ�� �UV�� i��� j���Y9GdÒJ1��詞�����V?h��l�����l�cGs�ځ�������y�Ac������\V3�? �� ܙg�>qH�S,�E�W�[�㺨�uch�⍸�O�}���a��>�q�6�n6�����N6�q��������N� ���! 1AQaq�0@����"2BRb�#Pr���3C`��Scst���$4D���%Td���� ?�����N����a��3��m���C���w��������xA�m�q�m����m������$����4n淿t'��C"w��zU=D�\R+w�p+Y�T�&�պ@��ƃ��3ޯ?�Aﶂ��aŘ���@-�����Q�=���9D��ռ�ѻ@��M�V��P��܅�G5�f�Y<�u=,EC)�<�Fy'�"�&�չ�X~f��l�KԆV��?�� �W�N����=(� �;���{�r����ٌ�Y���h{�١������jW����P���Tc�����X�K�r��}���w�R��%��?���E��m�� �Y�q|����\lEE4����r���}�lsI�Y������f�$�=�d�yO����p�����yBj8jU�o�/�S��?�U��*������ˍ�0�������u�q�m [�?f����a�� )Q�>����6#������� ?����0UQ����,IX���(6ڵ[�DI�MNލ�c&���υ�j\��X�R|,4��� j������T�hA�e��^���d���b<����n�� �즇�=!���3�^�`j�h�ȓr��jẕ�c�,ٞX����-����a�ﶔ���#�$��]w�O��Ӫ�1y%��L�Y<�wg#�ǝ�̗`�x�xa�t�w��»1���o7o5��>�m뭛C���Uƃߜ}�C���y1Xνm�F8�jI���]����H���ۺиE@I�i;r�8ӭ�����V�F�Շ| ��&?�3|x�B�MuS�Ge�=Ӕ�#BE5G������Y!z��_e��q�р/W>|-�Ci߇�t�1ޯќd�R3�u��g�=0 5��[?�#͏��q�cf���H��{ ?u�=?�?ǯ���}Z��z���hmΔ�BFTW�����<�q��(v� ��!��z���iW]*�J�V�z��gX֧A�q�&��/w���u�gYӘa���; �i=����g:��?2�dž6�ى�k�4�>�Pxs����}������G�9���3 ���)gG�R<>r h�$��'nc�h�P��Bj��J�ҧH� -��N1���N��?��~��}-q!=��_2hc�M��l�vY%UE�@|�v����M2�.Y[|y�"Eï��K�ZF,�ɯ?,q�?v�M 80jx�"�;�9vk�����+ ֧�� �ȺU��?�%�vcV��mA�6��Qg^M�����A}�3�nl� QRN�l8�kkn�'�����(��M�7m9و�q���%ޟ���*h$Zk"��$�9��: �?U8�Sl��,,|ɒ��xH(ѷ����Gn�/Q�4�P��G�%��Ա8�N��!� �&�7�;���eKM7�4��9R/%����l�c>�x;������>��C�:�����t��h?aKX�bhe�ᜋ^�$�Iհ �hr7%F$�E��Fd���t��5���+�(M6�t����Ü�UU|zW�=a�Ts�Tg������dqP�Q����b'�m���1{|Y����X�N��b �P~��F^F:����k6�"�j!�� �I�r�`��1&�-$�Bevk:y���#y�w��I0��x��=D�4��tU���P�ZH��ڠ底taP��6����b>�xa�����Q�#� WeF��ŮNj�p�J* mQ�N�����*I�-*�ȩ�F�g�3 �5��V�ʊ�ɮ�a��5F���O@{���NX��?����H�]3��1�Ri_u��������ѕ�� ����0��� F��~��:60�p�͈�S��qX#a�5>���`�o&+�<2�D����: �������ڝ�$�nP���*)�N�|y�Ej�F�5ټ�e���ihy�Z �>���k�bH�a�v��h�-#���!�Po=@k̆IEN��@��}Ll?j�O������߭�ʞ���Q|A07x���wt!xf���I2?Z��<ץ�T���cU�j��]���陎Ltl �}5�ϓ��$�,��O�mˊ�;�@O��jE��j(�ا,��LX���LO���Ц�90�O �.����a��nA���7������j4 ��W��_ٓ���zW�jcB������y՗+EM�)d���N�g6�y1_x��p�$Lv�:��9�"z��p���ʙ$��^��JԼ*�ϭ����o���=x�Lj�6�J��u82�A�H�3$�ٕ@�=Vv�]�'�qEz�;I˼��)��=��ɯ���x �/�W(V���p�����$ �m�������u�����񶤑Oqˎ�T����r��㠚x�sr�GC��byp�G��1ߠ�w e�8�$⿄����/�M{*}��W�]˷.�CK\�ުx���/$�WP�w���r� |i���&�}�{�X� �>��$-��l���?-z���g����lΆ���(F���h�vS*���b���߲ڡn,|)mrH[���a�3�ר�[1��3o_�U�3�TC�$��(�=�)0�kgP���� ��u�^=��4 �WYCҸ:��vQ�ר�X�à��tk�m,�t*��^�,�}D*�� �"(�I��9R����>`�`��[~Q]�#af��i6l��8���6�:,s�s�N6�j"�A4���IuQ��6E,�GnH��zS�HO�uk�5$�I�4��ؤ�Q9�@��C����wp��BGv[]�u�Ov����0I4���\��y�����Q�Ѹ��~>Z��8�T��a��q�ޣ;z��a���/��S��I:�ܫ_�|������>=Z����8:�S��U�I�J��"IY���8%b8���H��:�QO�6�;7�I�S��J��ҌAά3��>c���E+&jf$eC+�z�;��V����� �r���ʺ������my�e���aQ�f&��6�ND���.:��NT�vm�<- u���ǝ\MvZY�N�NT��-A�>jr!S��n�O 1�3�Ns�%�3D@���`������ܟ 1�^c<���� �a�ɽ�̲�Xë#�w�|y�cW�=�9I*H8�p�^(4���՗�k��arOcW�tO�\�ƍR��8����'�K���I�Q�����?5�>[�}��yU�ײ -h��=��% q�ThG�2�)���"ו3]�!kB��*p�FDl�A���,�eEi�H�f�Ps�����5�H:�Փ~�H�0Dت�D�I����h�F3�������c��2���E��9�H��5�zԑ�ʚ�i�X�=:m�xg�hd(�v����׊�9iS��O��d@0ڽ���:�p�5�h-��t�&���X�q�ӕ,��ie�|���7A�2���O%P��E��htj��Y1��w�Ѓ!����  ���� ࢽ��My�7�\�a�@�ţ�J ��4�Ȼ�F�@o�̒?4�wx��)��]�P��~�����u�����5�����7X ��9��^ܩ�U;Iꭆ 5 �������eK2�7(�{|��Y׎ �V��\"���Z�1� Z�����}��(�Ǝ"�1S���_�vE30>���p;� ΝD��%x�W�?W?v����o�^V�i�d��r[��/&>�~`�9Wh��y�;���R���� ;;ɮT��?����r$�g1�K����A��C��c��K��l:�'��3 c�ﳯ*"t8�~l��)���m��+U,z��`(��>yJ�?����h>��]��v��ЍG*�{`��;y]��I�T� ;c��NU�fo¾h���/$���|NS���1�S�"�H��V���T���4��uhǜ�]�v;���5�͠x��'C\�SBpl���h}�N����� A�Bx���%��ޭ�l��/����T��w�ʽ]D�=����K���ž�r㻠l4�S�O?=�k �M:� ��c�C�a�#ha���)�ѐxc�s���gP�iG���{+���x���Q���I= �� z��ԫ+ �8"�k�ñ�j=|����c ��y��CF��/���*9ж�h{ �?4�o� ��k�m�Q�N�x��;�Y��4膚�a�w?�6�>�e]�����Q�r�:����g�,i"�����ԩA��*M�<�G��b�if��l^M��5�� �Ҩ�{����6J��ZJ�����P�*�����Y���ݛu�_4�9�I8�7���������,^ToR���m4�H��?�N�S�ѕw��/S��甍�@�9H�S�T��t�ƻ���ʒU��*{Xs�@����f������֒Li�K{H�w^���������Ϥm�tq���s� ���ք��f:��o~s��g�r��ט� �S�ѱC�e]�x���a��) ���(b-$(�j>�7q�B?ӕ�F��hV25r[7 Y� }L�R��}����*sg+��x�r�2�U=�*'WS��ZDW]�WǞ�<��叓���{�$�9Ou4��y�90-�1�'*D`�c�^o?(�9��u���ݐ��'PI&� f�Jݮ�������:wS����jfP1F:X �H�9dԯ����˝[�_54 �}*;@�ܨ�� ð�yn�T���?�ןd�#���4rG�ͨ��H�1�|-#���Mr�S3��G�3�����)�.᧏3v�z֑��r����$G"�`j �1t��x0<Ɔ�Wh6�y�6��,œ�Ga��gA����y��b��)���h�D��ß�_�m��ü �gG;��e�v��ݝ�nQ� ��C����-�*��o���y�a��M��I�>�<���]obD��"�:���G�A��-\%LT�8���c�)��+y76���o�Q�#*{�(F�⽕�y����=���rW�\p���۩�c���A���^e6��K������ʐ�cVf5$�'->���ՉN"���F�"�UQ@�f��Gb~��#�&�M=��8�ט�JNu9��D��[̤�s�o�~������� G��9T�tW^g5y$b��Y'��س�Ǵ�=��U-2 #�MC�t(�i� �lj�@Q 5�̣i�*�O����s�x�K�f��}\��M{E�V�{�υ��Ƈ�����);�H����I��fe�Lȣr�2��>��W��I�Ȃ6������i��k�� �5�YOxȺ����>��Y�f5'��|��H+��98pj�n�.O�y�������jY��~��i�w'������l�;�s�2��Y��:'lg�ꥴ)o#'Sa�a�K��Z� �m��}�`169�n���"���x��I ��*+� }F<��cГ���F�P�������ֹ*�PqX�x۩��,� ��N�� �4<-����%����:��7����W���u�`����� $�?�I��&����o��o��`v�>��P��"��l���4��5'�Z�gE���8���?��[�X�7(��.Q�-��*���ތL@̲����v��.5���[��=�t\+�CNܛ��,g�SQnH����}*F�G16���&:�t��4ُ"A��̣��$�b �|����#rs��a�����T�� ]�<�j��B�S�('$�ɻ� �wP;�/�n��?�ݜ��x�F��yUn�~mL*-�������Xf�wd^�a�}��f�,=t�׵i�.2/wpN�Ep8�OР���•��R�FJ� 55TZ��T �ɭ�<��]��/�0�r�@�f��V��V����Nz�G��^���7hZi����k��3�,kN�e|�vg�1{9]_i��X5y7� 8e]�U����'�-2,���e"����]ot�I��Y_��n�(JҼ��1�O ]bXc���Nu�No��pS���Q_���_�?i�~�x h5d'�(qw52] ��'ޤ�q��o1�R!���`ywy�A4u���h<קy���\[~�4�\ X�Wt/� 6�����n�F�a8��f���z �3$�t(���q��q�x��^�XWeN'p<-v�!�{�(>ӽDP7��ո0�y)�e$ٕv�Ih'Q�EA�m*�H��RI��=:��� ���4牢) �%_iN�ݧ�l]� �Nt���G��H�L��� ɱ�g<���1V�,�J~�ٹ�"K��Q�� 9�HS�9�?@��k����r�;we݁�]I�!{ �@�G�[�"��`���J:�n]�{�cA�E����V��ʆ���#��U9�6����j�#Y�m\��q�e4h�B�7��C�������d<�?J����1g:ٳ���=Y���D�p�ц� ׈ǔ��1�]26؜oS�'��9�V�FVu�P�h�9�xc�oq�X��p�o�5��Ա5$�9W�V(�[Ak�aY錎qf;�'�[�|���b�6�Ck��)��#a#a˙��8���=äh�4��2��C��4tm^ �n'c����]GQ$[Wҿ��i���vN�{Fu ��1�gx��1┷���N�m��{j-,��x�� Ūm�ЧS�[�s���Gna���䑴�� x�p 8<������97�Q���ϴ�v�aϚG��Rt�Һ׈�f^\r��WH�JU�7Z���y)�vg=����n��4�_)y��D'y�6�]�c�5̪��\� �PF�k����&�c;��cq�$~T�7j ���nç]�<�g ":�to�t}�159�<�/�8������m�b�K#g'I'.W������6��I/��>v��\�MN��g���m�A�yQL�4u�Lj�j9��#44�t��l^�}L����n��R��!��t��±]��r��h6ٍ>�yҏ�N��fU�� ���� Fm@�8}�/u��jb9������he:A�y�ծw��GpΧh�5����l}�3p468��)U��d��c����;Us/�֔�YX�1�O2��uq�s��`hwg�r~�{ R��mhN��؎*q 42�*th��>�#���E����#��Hv�O����q�}������6�e��\�,Wk�#���X��b>��p}�դ��3���T5��†��6��[��@��P�y*n��|'f�֧>�lư΂�̺����SU�'*�q�p�_S�����M�� '��c�6������m�� ySʨ;M��r���Ƌ�m�Kxo,���Gm�P��A�G�:��i��w�9�}M(�^�V��$ǒ�ѽ�9���|���� �a����J�SQ�a���r�B;����}���ٻ֢�2�%U���c�#�g���N�a�ݕ�'�v�[�OY'��3L�3�;,p�]@�S��{ls��X�'���c�jw��k'a�.��}�}&�� �dP�*�bK=ɍ!����;3n�gΊU�ߴmt�'*{,=SzfD� A��ko~�G�aoq�_mi}#�m�������P�Xhύ�����mxǍ�΂���巿zf��Q���c���|kc�����?���W��Y�$���_Lv����l߶��c���`?����l�j�ݲˏ!V��6����U�Ђ(A���4y)H���p�Z_�x��>���e���R��$�/�`^'3qˏ�-&Q�=?��CFVR �D�fV�9��{�8g�������n�h�(P"��6�[�D���< E�����~0<@�`�G�6����Hг�cc�� �c�K.5��D��d�B���`?�XQ��2��ٿyqo&+�1^� DW�0�ꊩ���G�#��Q�nL3��c���������/��x ��1�1�[y�x�პCW��C�c�UĨ80�m�e�4.{�m��u���I=��f�����0QRls9���f���������9���~f�����Ǩ��a�"@�8���ȁ�Q����#c�ic������G��$���G���r/$W�(��W���V�"��m�7�[m�A�m����bo��D� j����۳� l���^�k�h׽����� ��#� iXn�v��eT�k�a�^Y�4�BN���ĕ���0������� !01@Q"2AaPq3BR�������?�����@4�Q�����T3,���㺠�W�[=JK�Ϟ���2�r^7��vc�:�9 �E�ߴ�w�S#d���Ix��u��:��Hp��9E!�� V 2;73|F��9Y���*ʬ�F��D����u&���y؟��^EA��A��(ɩ���^��GV:ݜDy�`��Jr29ܾ�㝉��[���E;Fzx��YG��U�e�Y�C���� ����v-tx����I�sם�Ę�q��Eb�+P\ :>�i�C'�;�����k|z�رn�y]�#ǿb��Q��������w�����(�r|ӹs��[�D��2v-%��@;�8<a���[\o[ϧw��I!��*0�krs)�[�J9^��ʜ��p1)� "��/_>��o��<1����A�E�y^�C��`�x1'ܣn�p��s`l���fQ��):�l����b>�Me�jH^?�kl3(�z:���1ŠK&?Q�~�{�ٺ�h�y���/�[��V�|6��}�KbX����mn[-��7�5q�94�������dm���c^���h� X��5��<�eޘ>G���-�}�دB�ޟ� ��|�rt�M��V+�]�c?�-#ڛ��^ǂ}���Lkr���O��u�>�-D�ry� D?:ޞ�U��ǜ�7�V��?瓮�"�#���r��չģVR;�n���/_� ؉v�ݶe5d�b9��/O��009�G���5n�W����JpA�*�r9�>�1��.[t���s�F���nQ� V 77R�]�ɫ8����_0<՜�IF�u(v��4��F�k�3��E)��N:��yڮe��P�`�1}�$WS��J�SQ�N�j��ٺ��޵�#l���ј(�5=��5�lǏmoW�v-�1����v,W�mn��߀$x�<����v�j(����c]��@#��1������Ǔ���o'��u+����;G�#�޸��v-lη��/(`i⣍Pm^����ԯ̾9Z��F��������n��1��� ��]�[��)�'�������:�֪�W��FC����� �B9،!?���]��V��A�Վ�M��b�w��G F>_DȬ0¤�#�QR�[V��kz���m�w�"��9ZG�7'[��=�Q����j8R?�zf�\a�=��O�U����*oB�A�|G���2�54 �p��.w7� �� ���&������ξxGHp� B%��$g�����t�Џ򤵍z���HN�u�Я�-�'4��0���;_���3������� !01"@AQa2Pq#3BR�������?����ʩca��en��^��8���<�u#��m*08r��y�N"�<�Ѳ0��@\�p��� �����Kv�D��J8�Fҽ� �f�Y��-m�ybX�NP����}�!*8t(�OqѢ��Q�wW�K��ZD��Δ^e��!� ��B�K��p~�����e*l}z#9ң�k���q#�Ft�o��S�R����-�w�!�S���Ӥß|M�l޶V��!eˈ�8Y���c�ЮM2��tk���� ������J�fS����Ö*i/2�����n]�k�\���|4yX�8��U�P.���Ы[���l��@"�t�<������5�lF���vU�����W��W��;�b�cД^6[#7@vU�xgZv��F�6��Q,K�v��� �+Ъ��n��Ǣ��Ft���8��0��c�@�!�Zq s�v�t�;#](B��-�nῃ~���3g������5�J�%���O������n�kB�ĺ�.r��+���#�N$?�q�/�s�6��p��a����a��J/��M�8��6�ܰ"�*������ɗud"\w���aT(����[��F��U՛����RT�b���n�*��6���O��SJ�.�ij<�v�MT��R\c��5l�sZB>F��<7�;EA��{��E���Ö��1U/�#��d1�a�n.1ě����0�ʾR�h��|�R��Ao�3�m3 ��%�� ���28Q�� ��y��φ���H�To�7�lW>����#i`�q���c����a��� �m,B�-j����݋�'mR1Ήt�>��V��p���s�0IbI�C.���1R�ea�����]H�6�����������4B>��o��](��$B���m�����a�!=���?�B� K�Ǿ+�Ծ"�n���K��*��+��[T#�{�E�J�S����Q�����s�5�:�U�\wĐ�f�3����܆&�)�����I���Ԇw��E T�lrTf6Q|R�h:��[K�� �z��c֧�G�C��%\��_�a��84��HcO�bi��ؖV��7H �)*ģK~Xhչ0��4?�0��� �E<���}3���#���u�?�� ��|g�S�6ꊤ�|�I#Hڛ� �ա��w�X��9��7���Ŀ%�SL��y6č��|�F�a 8���b���$�sק�h���b9RAu7�˨p�Č�_\*w��묦��F ����4D~�f����|(�"m���NK��i�S�>�$d7SlA��/�²����SL��|6N�}���S�˯���g��]6��; �#�.��<���q'Q�1|KQ$�����񛩶"�$r�b:���N8�w@��8$�� �AjfG|~�9F ���Y��ʺ��Bwؒ������M:I岎�G��`s�YV5����6��A �b:�W���G�q%l�����F��H���7�������Fsv7���k�� 403WebShell
403Webshell
Server IP : 84.32.84.77  /  Your IP : 216.73.216.150
Web Server : LiteSpeed
System : Linux in-mum-web1874.main-hosting.eu 5.14.0-570.21.1.el9_6.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Jun 11 07:22:35 EDT 2025 x86_64
User : u862839997 ( 862839997)
PHP Version : 8.2.30
Disable Function : system, exec, shell_exec, passthru, mysql_list_dbs, ini_alter, dl, symlink, link, chgrp, leak, popen, apache_child_terminate, virtual, mb_send_mail
MySQL : OFF  |  cURL : ON  |  WGET : ON  |  Perl : OFF  |  Python : OFF  |  Sudo : OFF  |  Pkexec : OFF
Directory :  /proc/3999839/root/opt/go/pkg/mod/go.mongodb.org/mongo-driver@v1.14.0/mongo/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :


[ Back ]     

Current File : /proc/3999839/root/opt/go/pkg/mod/go.mongodb.org/mongo-driver@v1.14.0/mongo/collection.go
// Copyright (C) MongoDB, Inc. 2017-present.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0

package mongo

import (
	"context"
	"errors"
	"fmt"
	"reflect"
	"strings"
	"time"

	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/bson/bsoncodec"
	"go.mongodb.org/mongo-driver/bson/bsontype"
	"go.mongodb.org/mongo-driver/bson/primitive"
	"go.mongodb.org/mongo-driver/internal/csfle"
	"go.mongodb.org/mongo-driver/mongo/description"
	"go.mongodb.org/mongo-driver/mongo/options"
	"go.mongodb.org/mongo-driver/mongo/readconcern"
	"go.mongodb.org/mongo-driver/mongo/readpref"
	"go.mongodb.org/mongo-driver/mongo/writeconcern"
	"go.mongodb.org/mongo-driver/x/bsonx/bsoncore"
	"go.mongodb.org/mongo-driver/x/mongo/driver"
	"go.mongodb.org/mongo-driver/x/mongo/driver/operation"
	"go.mongodb.org/mongo-driver/x/mongo/driver/session"
)

// Collection is a handle to a MongoDB collection. It is safe for concurrent use by multiple goroutines.
type Collection struct {
	client         *Client
	db             *Database
	name           string
	readConcern    *readconcern.ReadConcern
	writeConcern   *writeconcern.WriteConcern
	readPreference *readpref.ReadPref
	readSelector   description.ServerSelector
	writeSelector  description.ServerSelector
	bsonOpts       *options.BSONOptions
	registry       *bsoncodec.Registry
}

// aggregateParams is used to store information to configure an Aggregate operation.
type aggregateParams struct {
	ctx            context.Context
	pipeline       interface{}
	client         *Client
	bsonOpts       *options.BSONOptions
	registry       *bsoncodec.Registry
	readConcern    *readconcern.ReadConcern
	writeConcern   *writeconcern.WriteConcern
	retryRead      bool
	db             string
	col            string
	readSelector   description.ServerSelector
	writeSelector  description.ServerSelector
	readPreference *readpref.ReadPref
	opts           []*options.AggregateOptions
}

func closeImplicitSession(sess *session.Client) {
	if sess != nil && sess.IsImplicit {
		sess.EndSession()
	}
}

func newCollection(db *Database, name string, opts ...*options.CollectionOptions) *Collection {
	collOpt := options.MergeCollectionOptions(opts...)

	rc := db.readConcern
	if collOpt.ReadConcern != nil {
		rc = collOpt.ReadConcern
	}

	wc := db.writeConcern
	if collOpt.WriteConcern != nil {
		wc = collOpt.WriteConcern
	}

	rp := db.readPreference
	if collOpt.ReadPreference != nil {
		rp = collOpt.ReadPreference
	}

	bsonOpts := db.bsonOpts
	if collOpt.BSONOptions != nil {
		bsonOpts = collOpt.BSONOptions
	}

	reg := db.registry
	if collOpt.Registry != nil {
		reg = collOpt.Registry
	}

	readSelector := description.CompositeSelector([]description.ServerSelector{
		description.ReadPrefSelector(rp),
		description.LatencySelector(db.client.localThreshold),
	})

	writeSelector := description.CompositeSelector([]description.ServerSelector{
		description.WriteSelector(),
		description.LatencySelector(db.client.localThreshold),
	})

	coll := &Collection{
		client:         db.client,
		db:             db,
		name:           name,
		readPreference: rp,
		readConcern:    rc,
		writeConcern:   wc,
		readSelector:   readSelector,
		writeSelector:  writeSelector,
		bsonOpts:       bsonOpts,
		registry:       reg,
	}

	return coll
}

func (coll *Collection) copy() *Collection {
	return &Collection{
		client:         coll.client,
		db:             coll.db,
		name:           coll.name,
		readConcern:    coll.readConcern,
		writeConcern:   coll.writeConcern,
		readPreference: coll.readPreference,
		readSelector:   coll.readSelector,
		writeSelector:  coll.writeSelector,
		registry:       coll.registry,
	}
}

// Clone creates a copy of the Collection configured with the given CollectionOptions.
// The specified options are merged with the existing options on the collection, with the specified options taking
// precedence.
func (coll *Collection) Clone(opts ...*options.CollectionOptions) (*Collection, error) {
	copyColl := coll.copy()
	optsColl := options.MergeCollectionOptions(opts...)

	if optsColl.ReadConcern != nil {
		copyColl.readConcern = optsColl.ReadConcern
	}

	if optsColl.WriteConcern != nil {
		copyColl.writeConcern = optsColl.WriteConcern
	}

	if optsColl.ReadPreference != nil {
		copyColl.readPreference = optsColl.ReadPreference
	}

	if optsColl.Registry != nil {
		copyColl.registry = optsColl.Registry
	}

	copyColl.readSelector = description.CompositeSelector([]description.ServerSelector{
		description.ReadPrefSelector(copyColl.readPreference),
		description.LatencySelector(copyColl.client.localThreshold),
	})

	return copyColl, nil
}

// Name returns the name of the collection.
func (coll *Collection) Name() string {
	return coll.name
}

// Database returns the Database that was used to create the Collection.
func (coll *Collection) Database() *Database {
	return coll.db
}

// BulkWrite performs a bulk write operation (https://www.mongodb.com/docs/manual/core/bulk-write-operations/).
//
// The models parameter must be a slice of operations to be executed in this bulk write. It cannot be nil or empty.
// All of the models must be non-nil. See the mongo.WriteModel documentation for a list of valid model types and
// examples of how they should be used.
//
// The opts parameter can be used to specify options for the operation (see the options.BulkWriteOptions documentation.)
func (coll *Collection) BulkWrite(ctx context.Context, models []WriteModel,
	opts ...*options.BulkWriteOptions) (*BulkWriteResult, error) {

	if len(models) == 0 {
		return nil, ErrEmptySlice
	}

	if ctx == nil {
		ctx = context.Background()
	}

	sess := sessionFromContext(ctx)
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}

	err := coll.client.validSession(sess)
	if err != nil {
		return nil, err
	}

	wc := coll.writeConcern
	if sess.TransactionRunning() {
		wc = nil
	}
	if !writeconcern.AckWrite(wc) {
		sess = nil
	}

	selector := makePinnedSelector(sess, coll.writeSelector)

	for _, model := range models {
		if model == nil {
			return nil, ErrNilDocument
		}
	}

	bwo := options.MergeBulkWriteOptions(opts...)

	op := bulkWrite{
		comment:                  bwo.Comment,
		ordered:                  bwo.Ordered,
		bypassDocumentValidation: bwo.BypassDocumentValidation,
		models:                   models,
		session:                  sess,
		collection:               coll,
		selector:                 selector,
		writeConcern:             wc,
		let:                      bwo.Let,
	}

	err = op.execute(ctx)

	return &op.result, replaceErrors(err)
}

func (coll *Collection) insert(ctx context.Context, documents []interface{},
	opts ...*options.InsertManyOptions) ([]interface{}, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	result := make([]interface{}, len(documents))
	docs := make([]bsoncore.Document, len(documents))

	for i, doc := range documents {
		bsoncoreDoc, err := marshal(doc, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		bsoncoreDoc, id, err := ensureID(bsoncoreDoc, primitive.NilObjectID, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}

		docs[i] = bsoncoreDoc
		result[i] = id
	}

	sess := sessionFromContext(ctx)
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}

	err := coll.client.validSession(sess)
	if err != nil {
		return nil, err
	}

	wc := coll.writeConcern
	if sess.TransactionRunning() {
		wc = nil
	}
	if !writeconcern.AckWrite(wc) {
		sess = nil
	}

	selector := makePinnedSelector(sess, coll.writeSelector)

	op := operation.NewInsert(docs...).
		Session(sess).WriteConcern(wc).CommandMonitor(coll.client.monitor).
		ServerSelector(selector).ClusterClock(coll.client.clock).
		Database(coll.db.name).Collection(coll.name).
		Deployment(coll.client.deployment).Crypt(coll.client.cryptFLE).Ordered(true).
		ServerAPI(coll.client.serverAPI).Timeout(coll.client.timeout).Logger(coll.client.logger)
	imo := options.MergeInsertManyOptions(opts...)
	if imo.BypassDocumentValidation != nil && *imo.BypassDocumentValidation {
		op = op.BypassDocumentValidation(*imo.BypassDocumentValidation)
	}
	if imo.Comment != nil {
		comment, err := marshalValue(imo.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op = op.Comment(comment)
	}
	if imo.Ordered != nil {
		op = op.Ordered(*imo.Ordered)
	}
	retry := driver.RetryNone
	if coll.client.retryWrites {
		retry = driver.RetryOncePerCommand
	}
	op = op.Retry(retry)

	err = op.Execute(ctx)
	var wce driver.WriteCommandError
	if !errors.As(err, &wce) {
		return result, err
	}

	// remove the ids that had writeErrors from result
	for i, we := range wce.WriteErrors {
		// i indexes have been removed before the current error, so the index is we.Index-i
		idIndex := int(we.Index) - i
		// if the insert is ordered, nothing after the error was inserted
		if imo.Ordered == nil || *imo.Ordered {
			result = result[:idIndex]
			break
		}
		result = append(result[:idIndex], result[idIndex+1:]...)
	}

	return result, err
}

// InsertOne executes an insert command to insert a single document into the collection.
//
// The document parameter must be the document to be inserted. It cannot be nil. If the document does not have an _id
// field when transformed into BSON, one will be added automatically to the marshalled document. The original document
// will not be modified. The _id can be retrieved from the InsertedID field of the returned InsertOneResult.
//
// The opts parameter can be used to specify options for the operation (see the options.InsertOneOptions documentation.)
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/insert/.
func (coll *Collection) InsertOne(ctx context.Context, document interface{},
	opts ...*options.InsertOneOptions) (*InsertOneResult, error) {

	ioOpts := options.MergeInsertOneOptions(opts...)
	imOpts := options.InsertMany()

	if ioOpts.BypassDocumentValidation != nil && *ioOpts.BypassDocumentValidation {
		imOpts.SetBypassDocumentValidation(*ioOpts.BypassDocumentValidation)
	}
	if ioOpts.Comment != nil {
		imOpts.SetComment(ioOpts.Comment)
	}
	res, err := coll.insert(ctx, []interface{}{document}, imOpts)

	rr, err := processWriteError(err)
	if rr&rrOne == 0 {
		return nil, err
	}
	return &InsertOneResult{InsertedID: res[0]}, err
}

// InsertMany executes an insert command to insert multiple documents into the collection. If write errors occur
// during the operation (e.g. duplicate key error), this method returns a BulkWriteException error.
//
// The documents parameter must be a slice of documents to insert. The slice cannot be nil or empty. The elements must
// all be non-nil. For any document that does not have an _id field when transformed into BSON, one will be added
// automatically to the marshalled document. The original document will not be modified. The _id values for the inserted
// documents can be retrieved from the InsertedIDs field of the returned InsertManyResult.
//
// The opts parameter can be used to specify options for the operation (see the options.InsertManyOptions documentation.)
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/insert/.
func (coll *Collection) InsertMany(ctx context.Context, documents []interface{},
	opts ...*options.InsertManyOptions) (*InsertManyResult, error) {

	if len(documents) == 0 {
		return nil, ErrEmptySlice
	}

	result, err := coll.insert(ctx, documents, opts...)
	rr, err := processWriteError(err)
	if rr&rrMany == 0 {
		return nil, err
	}

	imResult := &InsertManyResult{InsertedIDs: result}
	var writeException WriteException
	if !errors.As(err, &writeException) {
		return imResult, err
	}

	// create and return a BulkWriteException
	bwErrors := make([]BulkWriteError, 0, len(writeException.WriteErrors))
	for _, we := range writeException.WriteErrors {
		bwErrors = append(bwErrors, BulkWriteError{
			WriteError: we,
			Request:    nil,
		})
	}

	return imResult, BulkWriteException{
		WriteErrors:       bwErrors,
		WriteConcernError: writeException.WriteConcernError,
		Labels:            writeException.Labels,
	}
}

func (coll *Collection) delete(ctx context.Context, filter interface{}, deleteOne bool, expectedRr returnResult,
	opts ...*options.DeleteOptions) (*DeleteResult, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return nil, err
	}

	sess := sessionFromContext(ctx)
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}

	err = coll.client.validSession(sess)
	if err != nil {
		return nil, err
	}

	wc := coll.writeConcern
	if sess.TransactionRunning() {
		wc = nil
	}
	if !writeconcern.AckWrite(wc) {
		sess = nil
	}

	selector := makePinnedSelector(sess, coll.writeSelector)

	var limit int32
	if deleteOne {
		limit = 1
	}
	do := options.MergeDeleteOptions(opts...)
	didx, doc := bsoncore.AppendDocumentStart(nil)
	doc = bsoncore.AppendDocumentElement(doc, "q", f)
	doc = bsoncore.AppendInt32Element(doc, "limit", limit)
	if do.Collation != nil {
		doc = bsoncore.AppendDocumentElement(doc, "collation", do.Collation.ToDocument())
	}
	if do.Hint != nil {
		if isUnorderedMap(do.Hint) {
			return nil, ErrMapForOrderedArgument{"hint"}
		}
		hint, err := marshalValue(do.Hint, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}

		doc = bsoncore.AppendValueElement(doc, "hint", hint)
	}
	doc, _ = bsoncore.AppendDocumentEnd(doc, didx)

	op := operation.NewDelete(doc).
		Session(sess).WriteConcern(wc).CommandMonitor(coll.client.monitor).
		ServerSelector(selector).ClusterClock(coll.client.clock).
		Database(coll.db.name).Collection(coll.name).
		Deployment(coll.client.deployment).Crypt(coll.client.cryptFLE).Ordered(true).
		ServerAPI(coll.client.serverAPI).Timeout(coll.client.timeout).Logger(coll.client.logger)
	if do.Comment != nil {
		comment, err := marshalValue(do.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op = op.Comment(comment)
	}
	if do.Hint != nil {
		op = op.Hint(true)
	}
	if do.Let != nil {
		let, err := marshal(do.Let, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op = op.Let(let)
	}

	// deleteMany cannot be retried
	retryMode := driver.RetryNone
	if deleteOne && coll.client.retryWrites {
		retryMode = driver.RetryOncePerCommand
	}
	op = op.Retry(retryMode)
	rr, err := processWriteError(op.Execute(ctx))
	if rr&expectedRr == 0 {
		return nil, err
	}
	return &DeleteResult{DeletedCount: op.Result().N}, err
}

// DeleteOne executes a delete command to delete at most one document from the collection.
//
// The filter parameter must be a document containing query operators and can be used to select the document to be
// deleted. It cannot be nil. If the filter does not match any documents, the operation will succeed and a DeleteResult
// with a DeletedCount of 0 will be returned. If the filter matches multiple documents, one will be selected from the
// matched set.
//
// The opts parameter can be used to specify options for the operation (see the options.DeleteOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/delete/.
func (coll *Collection) DeleteOne(ctx context.Context, filter interface{},
	opts ...*options.DeleteOptions) (*DeleteResult, error) {

	return coll.delete(ctx, filter, true, rrOne, opts...)
}

// DeleteMany executes a delete command to delete documents from the collection.
//
// The filter parameter must be a document containing query operators and can be used to select the documents to
// be deleted. It cannot be nil. An empty document (e.g. bson.D{}) should be used to delete all documents in the
// collection. If the filter does not match any documents, the operation will succeed and a DeleteResult with a
// DeletedCount of 0 will be returned.
//
// The opts parameter can be used to specify options for the operation (see the options.DeleteOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/delete/.
func (coll *Collection) DeleteMany(ctx context.Context, filter interface{},
	opts ...*options.DeleteOptions) (*DeleteResult, error) {

	return coll.delete(ctx, filter, false, rrMany, opts...)
}

func (coll *Collection) updateOrReplace(ctx context.Context, filter bsoncore.Document, update interface{}, multi bool,
	expectedRr returnResult, checkDollarKey bool, opts ...*options.UpdateOptions) (*UpdateResult, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	uo := options.MergeUpdateOptions(opts...)

	// collation, arrayFilters, upsert, and hint are included on the individual update documents rather than as part of the
	// command
	updateDoc, err := createUpdateDoc(
		filter,
		update,
		uo.Hint,
		uo.ArrayFilters,
		uo.Collation,
		uo.Upsert,
		multi,
		checkDollarKey,
		coll.bsonOpts,
		coll.registry)
	if err != nil {
		return nil, err
	}

	sess := sessionFromContext(ctx)
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}

	err = coll.client.validSession(sess)
	if err != nil {
		return nil, err
	}

	wc := coll.writeConcern
	if sess.TransactionRunning() {
		wc = nil
	}
	if !writeconcern.AckWrite(wc) {
		sess = nil
	}

	selector := makePinnedSelector(sess, coll.writeSelector)

	op := operation.NewUpdate(updateDoc).
		Session(sess).WriteConcern(wc).CommandMonitor(coll.client.monitor).
		ServerSelector(selector).ClusterClock(coll.client.clock).
		Database(coll.db.name).Collection(coll.name).
		Deployment(coll.client.deployment).Crypt(coll.client.cryptFLE).Hint(uo.Hint != nil).
		ArrayFilters(uo.ArrayFilters != nil).Ordered(true).ServerAPI(coll.client.serverAPI).
		Timeout(coll.client.timeout).Logger(coll.client.logger)
	if uo.Let != nil {
		let, err := marshal(uo.Let, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op = op.Let(let)
	}

	if uo.BypassDocumentValidation != nil && *uo.BypassDocumentValidation {
		op = op.BypassDocumentValidation(*uo.BypassDocumentValidation)
	}
	if uo.Comment != nil {
		comment, err := marshalValue(uo.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op = op.Comment(comment)
	}
	retry := driver.RetryNone
	// retryable writes are only enabled updateOne/replaceOne operations
	if !multi && coll.client.retryWrites {
		retry = driver.RetryOncePerCommand
	}
	op = op.Retry(retry)
	err = op.Execute(ctx)

	rr, err := processWriteError(err)
	if rr&expectedRr == 0 {
		return nil, err
	}

	opRes := op.Result()
	res := &UpdateResult{
		MatchedCount:  opRes.N,
		ModifiedCount: opRes.NModified,
		UpsertedCount: int64(len(opRes.Upserted)),
	}
	if len(opRes.Upserted) > 0 {
		res.UpsertedID = opRes.Upserted[0].ID
		res.MatchedCount--
	}

	return res, err
}

// UpdateByID executes an update command to update the document whose _id value matches the provided ID in the collection.
// This is equivalent to running UpdateOne(ctx, bson.D{{"_id", id}}, update, opts...).
//
// The id parameter is the _id of the document to be updated. It cannot be nil. If the ID does not match any documents,
// the operation will succeed and an UpdateResult with a MatchedCount of 0 will be returned.
//
// The update parameter must be a document containing update operators
// (https://www.mongodb.com/docs/manual/reference/operator/update/) and can be used to specify the modifications to be
// made to the selected document. It cannot be nil or empty.
//
// The opts parameter can be used to specify options for the operation (see the options.UpdateOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/update/.
func (coll *Collection) UpdateByID(ctx context.Context, id interface{}, update interface{},
	opts ...*options.UpdateOptions) (*UpdateResult, error) {
	if id == nil {
		return nil, ErrNilValue
	}
	return coll.UpdateOne(ctx, bson.D{{"_id", id}}, update, opts...)
}

// UpdateOne executes an update command to update at most one document in the collection.
//
// The filter parameter must be a document containing query operators and can be used to select the document to be
// updated. It cannot be nil. If the filter does not match any documents, the operation will succeed and an UpdateResult
// with a MatchedCount of 0 will be returned. If the filter matches multiple documents, one will be selected from the
// matched set and MatchedCount will equal 1.
//
// The update parameter must be a document containing update operators
// (https://www.mongodb.com/docs/manual/reference/operator/update/) and can be used to specify the modifications to be
// made to the selected document. It cannot be nil or empty.
//
// The opts parameter can be used to specify options for the operation (see the options.UpdateOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/update/.
func (coll *Collection) UpdateOne(ctx context.Context, filter interface{}, update interface{},
	opts ...*options.UpdateOptions) (*UpdateResult, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return nil, err
	}

	return coll.updateOrReplace(ctx, f, update, false, rrOne, true, opts...)
}

// UpdateMany executes an update command to update documents in the collection.
//
// The filter parameter must be a document containing query operators and can be used to select the documents to be
// updated. It cannot be nil. If the filter does not match any documents, the operation will succeed and an UpdateResult
// with a MatchedCount of 0 will be returned.
//
// The update parameter must be a document containing update operators
// (https://www.mongodb.com/docs/manual/reference/operator/update/) and can be used to specify the modifications to be made
// to the selected documents. It cannot be nil or empty.
//
// The opts parameter can be used to specify options for the operation (see the options.UpdateOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/update/.
func (coll *Collection) UpdateMany(ctx context.Context, filter interface{}, update interface{},
	opts ...*options.UpdateOptions) (*UpdateResult, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return nil, err
	}

	return coll.updateOrReplace(ctx, f, update, true, rrMany, true, opts...)
}

// ReplaceOne executes an update command to replace at most one document in the collection.
//
// The filter parameter must be a document containing query operators and can be used to select the document to be
// replaced. It cannot be nil. If the filter does not match any documents, the operation will succeed and an
// UpdateResult with a MatchedCount of 0 will be returned. If the filter matches multiple documents, one will be
// selected from the matched set and MatchedCount will equal 1.
//
// The replacement parameter must be a document that will be used to replace the selected document. It cannot be nil
// and cannot contain any update operators (https://www.mongodb.com/docs/manual/reference/operator/update/).
//
// The opts parameter can be used to specify options for the operation (see the options.ReplaceOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/update/.
func (coll *Collection) ReplaceOne(ctx context.Context, filter interface{},
	replacement interface{}, opts ...*options.ReplaceOptions) (*UpdateResult, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return nil, err
	}

	r, err := marshal(replacement, coll.bsonOpts, coll.registry)
	if err != nil {
		return nil, err
	}

	if err := ensureNoDollarKey(r); err != nil {
		return nil, err
	}

	updateOptions := make([]*options.UpdateOptions, 0, len(opts))
	for _, opt := range opts {
		if opt == nil {
			continue
		}
		uOpts := options.Update()
		uOpts.BypassDocumentValidation = opt.BypassDocumentValidation
		uOpts.Collation = opt.Collation
		uOpts.Upsert = opt.Upsert
		uOpts.Hint = opt.Hint
		uOpts.Let = opt.Let
		uOpts.Comment = opt.Comment
		updateOptions = append(updateOptions, uOpts)
	}

	return coll.updateOrReplace(ctx, f, r, false, rrOne, false, updateOptions...)
}

// Aggregate executes an aggregate command against the collection and returns a cursor over the resulting documents.
//
// The pipeline parameter must be an array of documents, each representing an aggregation stage. The pipeline cannot
// be nil but can be empty. The stage documents must all be non-nil. For a pipeline of bson.D documents, the
// mongo.Pipeline type can be used. See
// https://www.mongodb.com/docs/manual/reference/operator/aggregation-pipeline/#db-collection-aggregate-stages for a list of
// valid stages in aggregations.
//
// The opts parameter can be used to specify options for the operation (see the options.AggregateOptions documentation.)
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/aggregate/.
func (coll *Collection) Aggregate(ctx context.Context, pipeline interface{},
	opts ...*options.AggregateOptions) (*Cursor, error) {
	a := aggregateParams{
		ctx:            ctx,
		pipeline:       pipeline,
		client:         coll.client,
		registry:       coll.registry,
		readConcern:    coll.readConcern,
		writeConcern:   coll.writeConcern,
		bsonOpts:       coll.bsonOpts,
		retryRead:      coll.client.retryReads,
		db:             coll.db.name,
		col:            coll.name,
		readSelector:   coll.readSelector,
		writeSelector:  coll.writeSelector,
		readPreference: coll.readPreference,
		opts:           opts,
	}
	return aggregate(a)
}

// aggregate is the helper method for Aggregate
func aggregate(a aggregateParams) (cur *Cursor, err error) {
	if a.ctx == nil {
		a.ctx = context.Background()
	}

	pipelineArr, hasOutputStage, err := marshalAggregatePipeline(a.pipeline, a.bsonOpts, a.registry)
	if err != nil {
		return nil, err
	}

	sess := sessionFromContext(a.ctx)
	// Always close any created implicit sessions if aggregate returns an error.
	defer func() {
		if err != nil && sess != nil {
			closeImplicitSession(sess)
		}
	}()
	if sess == nil && a.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(a.client.sessionPool, a.client.id)
	}
	if err = a.client.validSession(sess); err != nil {
		return nil, err
	}

	var wc *writeconcern.WriteConcern
	if hasOutputStage {
		wc = a.writeConcern
	}
	rc := a.readConcern
	if sess.TransactionRunning() {
		wc = nil
		rc = nil
	}
	if !writeconcern.AckWrite(wc) {
		closeImplicitSession(sess)
		sess = nil
	}

	selector := makeReadPrefSelector(sess, a.readSelector, a.client.localThreshold)
	if hasOutputStage {
		selector = makeOutputAggregateSelector(sess, a.readPreference, a.client.localThreshold)
	}

	ao := options.MergeAggregateOptions(a.opts...)

	cursorOpts := a.client.createBaseCursorOptions()

	cursorOpts.MarshalValueEncoderFn = newEncoderFn(a.bsonOpts, a.registry)

	op := operation.NewAggregate(pipelineArr).
		Session(sess).
		WriteConcern(wc).
		ReadConcern(rc).
		ReadPreference(a.readPreference).
		CommandMonitor(a.client.monitor).
		ServerSelector(selector).
		ClusterClock(a.client.clock).
		Database(a.db).
		Collection(a.col).
		Deployment(a.client.deployment).
		Crypt(a.client.cryptFLE).
		ServerAPI(a.client.serverAPI).
		HasOutputStage(hasOutputStage).
		Timeout(a.client.timeout).
		MaxTime(ao.MaxTime)

	if ao.AllowDiskUse != nil {
		op.AllowDiskUse(*ao.AllowDiskUse)
	}
	// ignore batchSize of 0 with $out
	if ao.BatchSize != nil && !(*ao.BatchSize == 0 && hasOutputStage) {
		op.BatchSize(*ao.BatchSize)
		cursorOpts.BatchSize = *ao.BatchSize
	}
	if ao.BypassDocumentValidation != nil && *ao.BypassDocumentValidation {
		op.BypassDocumentValidation(*ao.BypassDocumentValidation)
	}
	if ao.Collation != nil {
		op.Collation(bsoncore.Document(ao.Collation.ToDocument()))
	}
	if ao.MaxAwaitTime != nil {
		cursorOpts.MaxTimeMS = int64(*ao.MaxAwaitTime / time.Millisecond)
	}
	if ao.Comment != nil {
		op.Comment(*ao.Comment)

		commentVal, err := marshalValue(ao.Comment, a.bsonOpts, a.registry)
		if err != nil {
			return nil, err
		}
		cursorOpts.Comment = commentVal
	}
	if ao.Hint != nil {
		if isUnorderedMap(ao.Hint) {
			return nil, ErrMapForOrderedArgument{"hint"}
		}
		hintVal, err := marshalValue(ao.Hint, a.bsonOpts, a.registry)
		if err != nil {
			return nil, err
		}
		op.Hint(hintVal)
	}
	if ao.Let != nil {
		let, err := marshal(ao.Let, a.bsonOpts, a.registry)
		if err != nil {
			return nil, err
		}
		op.Let(let)
	}
	if ao.Custom != nil {
		// Marshal all custom options before passing to the aggregate operation. Return
		// any errors from Marshaling.
		customOptions := make(map[string]bsoncore.Value)
		for optionName, optionValue := range ao.Custom {
			bsonType, bsonData, err := bson.MarshalValueWithRegistry(a.registry, optionValue)
			if err != nil {
				return nil, err
			}
			optionValueBSON := bsoncore.Value{Type: bsonType, Data: bsonData}
			customOptions[optionName] = optionValueBSON
		}
		op.CustomOptions(customOptions)
	}

	retry := driver.RetryNone
	if a.retryRead && !hasOutputStage {
		retry = driver.RetryOncePerCommand
	}
	op = op.Retry(retry)

	err = op.Execute(a.ctx)
	if err != nil {
		if wce, ok := err.(driver.WriteCommandError); ok && wce.WriteConcernError != nil {
			return nil, *convertDriverWriteConcernError(wce.WriteConcernError)
		}
		return nil, replaceErrors(err)
	}

	bc, err := op.Result(cursorOpts)
	if err != nil {
		return nil, replaceErrors(err)
	}
	cursor, err := newCursorWithSession(bc, a.client.bsonOpts, a.registry, sess)
	return cursor, replaceErrors(err)
}

// CountDocuments returns the number of documents in the collection. For a fast count of the documents in the
// collection, see the EstimatedDocumentCount method.
//
// The filter parameter must be a document and can be used to select which documents contribute to the count. It
// cannot be nil. An empty document (e.g. bson.D{}) should be used to count all documents in the collection. This will
// result in a full collection scan.
//
// The opts parameter can be used to specify options for the operation (see the options.CountOptions documentation).
func (coll *Collection) CountDocuments(ctx context.Context, filter interface{},
	opts ...*options.CountOptions) (int64, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	countOpts := options.MergeCountOptions(opts...)

	pipelineArr, err := countDocumentsAggregatePipeline(filter, coll.bsonOpts, coll.registry, countOpts)
	if err != nil {
		return 0, err
	}

	sess := sessionFromContext(ctx)
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}
	if err = coll.client.validSession(sess); err != nil {
		return 0, err
	}

	rc := coll.readConcern
	if sess.TransactionRunning() {
		rc = nil
	}

	selector := makeReadPrefSelector(sess, coll.readSelector, coll.client.localThreshold)
	op := operation.NewAggregate(pipelineArr).Session(sess).ReadConcern(rc).ReadPreference(coll.readPreference).
		CommandMonitor(coll.client.monitor).ServerSelector(selector).ClusterClock(coll.client.clock).Database(coll.db.name).
		Collection(coll.name).Deployment(coll.client.deployment).Crypt(coll.client.cryptFLE).ServerAPI(coll.client.serverAPI).
		Timeout(coll.client.timeout).MaxTime(countOpts.MaxTime)
	if countOpts.Collation != nil {
		op.Collation(bsoncore.Document(countOpts.Collation.ToDocument()))
	}
	if countOpts.Comment != nil {
		op.Comment(*countOpts.Comment)
	}
	if countOpts.Hint != nil {
		if isUnorderedMap(countOpts.Hint) {
			return 0, ErrMapForOrderedArgument{"hint"}
		}
		hintVal, err := marshalValue(countOpts.Hint, coll.bsonOpts, coll.registry)
		if err != nil {
			return 0, err
		}
		op.Hint(hintVal)
	}
	retry := driver.RetryNone
	if coll.client.retryReads {
		retry = driver.RetryOncePerCommand
	}
	op = op.Retry(retry)

	err = op.Execute(ctx)
	if err != nil {
		return 0, replaceErrors(err)
	}

	batch := op.ResultCursorResponse().FirstBatch
	if batch == nil {
		return 0, errors.New("invalid response from server, no 'firstBatch' field")
	}

	docs, err := batch.Documents()
	if err != nil || len(docs) == 0 {
		return 0, nil
	}

	val, ok := docs[0].Lookup("n").AsInt64OK()
	if !ok {
		return 0, errors.New("invalid response from server, no 'n' field")
	}

	return val, nil
}

// EstimatedDocumentCount executes a count command and returns an estimate of the number of documents in the collection
// using collection metadata.
//
// The opts parameter can be used to specify options for the operation (see the options.EstimatedDocumentCountOptions
// documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/count/.
func (coll *Collection) EstimatedDocumentCount(ctx context.Context,
	opts ...*options.EstimatedDocumentCountOptions) (int64, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	sess := sessionFromContext(ctx)

	var err error
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}

	err = coll.client.validSession(sess)
	if err != nil {
		return 0, err
	}

	rc := coll.readConcern
	if sess.TransactionRunning() {
		rc = nil
	}

	co := options.MergeEstimatedDocumentCountOptions(opts...)

	selector := makeReadPrefSelector(sess, coll.readSelector, coll.client.localThreshold)
	op := operation.NewCount().Session(sess).ClusterClock(coll.client.clock).
		Database(coll.db.name).Collection(coll.name).CommandMonitor(coll.client.monitor).
		Deployment(coll.client.deployment).ReadConcern(rc).ReadPreference(coll.readPreference).
		ServerSelector(selector).Crypt(coll.client.cryptFLE).ServerAPI(coll.client.serverAPI).
		Timeout(coll.client.timeout).MaxTime(co.MaxTime)

	if co.Comment != nil {
		comment, err := marshalValue(co.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return 0, err
		}
		op = op.Comment(comment)
	}

	retry := driver.RetryNone
	if coll.client.retryReads {
		retry = driver.RetryOncePerCommand
	}
	op.Retry(retry)

	err = op.Execute(ctx)
	return op.Result().N, replaceErrors(err)
}

// Distinct executes a distinct command to find the unique values for a specified field in the collection.
//
// The fieldName parameter specifies the field name for which distinct values should be returned.
//
// The filter parameter must be a document containing query operators and can be used to select which documents are
// considered. It cannot be nil. An empty document (e.g. bson.D{}) should be used to select all documents.
//
// The opts parameter can be used to specify options for the operation (see the options.DistinctOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/distinct/.
func (coll *Collection) Distinct(ctx context.Context, fieldName string, filter interface{},
	opts ...*options.DistinctOptions) ([]interface{}, error) {

	if ctx == nil {
		ctx = context.Background()
	}

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return nil, err
	}

	sess := sessionFromContext(ctx)

	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}

	err = coll.client.validSession(sess)
	if err != nil {
		return nil, err
	}

	rc := coll.readConcern
	if sess.TransactionRunning() {
		rc = nil
	}

	selector := makeReadPrefSelector(sess, coll.readSelector, coll.client.localThreshold)
	option := options.MergeDistinctOptions(opts...)

	op := operation.NewDistinct(fieldName, f).
		Session(sess).ClusterClock(coll.client.clock).
		Database(coll.db.name).Collection(coll.name).CommandMonitor(coll.client.monitor).
		Deployment(coll.client.deployment).ReadConcern(rc).ReadPreference(coll.readPreference).
		ServerSelector(selector).Crypt(coll.client.cryptFLE).ServerAPI(coll.client.serverAPI).
		Timeout(coll.client.timeout).MaxTime(option.MaxTime)

	if option.Collation != nil {
		op.Collation(bsoncore.Document(option.Collation.ToDocument()))
	}
	if option.Comment != nil {
		comment, err := marshalValue(option.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op.Comment(comment)
	}
	retry := driver.RetryNone
	if coll.client.retryReads {
		retry = driver.RetryOncePerCommand
	}
	op = op.Retry(retry)

	err = op.Execute(ctx)
	if err != nil {
		return nil, replaceErrors(err)
	}

	arr, ok := op.Result().Values.ArrayOK()
	if !ok {
		return nil, fmt.Errorf("response field 'values' is type array, but received BSON type %s", op.Result().Values.Type)
	}

	values, err := arr.Values()
	if err != nil {
		return nil, err
	}

	retArray := make([]interface{}, len(values))

	for i, val := range values {
		raw := bson.RawValue{Type: val.Type, Value: val.Data}
		err = raw.Unmarshal(&retArray[i])
		if err != nil {
			return nil, err
		}
	}

	return retArray, replaceErrors(err)
}

// Find executes a find command and returns a Cursor over the matching documents in the collection.
//
// The filter parameter must be a document containing query operators and can be used to select which documents are
// included in the result. It cannot be nil. An empty document (e.g. bson.D{}) should be used to include all documents.
//
// The opts parameter can be used to specify options for the operation (see the options.FindOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/find/.
func (coll *Collection) Find(ctx context.Context, filter interface{},
	opts ...*options.FindOptions) (cur *Cursor, err error) {

	if ctx == nil {
		ctx = context.Background()
	}

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return nil, err
	}

	sess := sessionFromContext(ctx)
	// Always close any created implicit sessions if Find returns an error.
	defer func() {
		if err != nil && sess != nil {
			closeImplicitSession(sess)
		}
	}()
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
	}

	err = coll.client.validSession(sess)
	if err != nil {
		return nil, err
	}

	rc := coll.readConcern
	if sess.TransactionRunning() {
		rc = nil
	}

	fo := options.MergeFindOptions(opts...)

	selector := makeReadPrefSelector(sess, coll.readSelector, coll.client.localThreshold)
	op := operation.NewFind(f).
		Session(sess).ReadConcern(rc).ReadPreference(coll.readPreference).
		CommandMonitor(coll.client.monitor).ServerSelector(selector).
		ClusterClock(coll.client.clock).Database(coll.db.name).Collection(coll.name).
		Deployment(coll.client.deployment).Crypt(coll.client.cryptFLE).ServerAPI(coll.client.serverAPI).
		Timeout(coll.client.timeout).MaxTime(fo.MaxTime).Logger(coll.client.logger)

	cursorOpts := coll.client.createBaseCursorOptions()

	cursorOpts.MarshalValueEncoderFn = newEncoderFn(coll.bsonOpts, coll.registry)

	if fo.AllowDiskUse != nil {
		op.AllowDiskUse(*fo.AllowDiskUse)
	}
	if fo.AllowPartialResults != nil {
		op.AllowPartialResults(*fo.AllowPartialResults)
	}
	if fo.BatchSize != nil {
		cursorOpts.BatchSize = *fo.BatchSize
		op.BatchSize(*fo.BatchSize)
	}
	if fo.Collation != nil {
		op.Collation(bsoncore.Document(fo.Collation.ToDocument()))
	}
	if fo.Comment != nil {
		op.Comment(*fo.Comment)

		commentVal, err := marshalValue(fo.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		cursorOpts.Comment = commentVal
	}
	if fo.CursorType != nil {
		switch *fo.CursorType {
		case options.Tailable:
			op.Tailable(true)
		case options.TailableAwait:
			op.Tailable(true)
			op.AwaitData(true)
		}
	}
	if fo.Hint != nil {
		if isUnorderedMap(fo.Hint) {
			return nil, ErrMapForOrderedArgument{"hint"}
		}
		hint, err := marshalValue(fo.Hint, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op.Hint(hint)
	}
	if fo.Let != nil {
		let, err := marshal(fo.Let, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op.Let(let)
	}
	if fo.Limit != nil {
		limit := *fo.Limit
		if limit < 0 {
			limit = -1 * limit
			op.SingleBatch(true)
		}
		cursorOpts.Limit = int32(limit)
		op.Limit(limit)
	}
	if fo.Max != nil {
		max, err := marshal(fo.Max, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op.Max(max)
	}
	if fo.MaxAwaitTime != nil {
		cursorOpts.MaxTimeMS = int64(*fo.MaxAwaitTime / time.Millisecond)
	}
	if fo.Min != nil {
		min, err := marshal(fo.Min, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op.Min(min)
	}
	if fo.NoCursorTimeout != nil {
		op.NoCursorTimeout(*fo.NoCursorTimeout)
	}
	if fo.OplogReplay != nil {
		op.OplogReplay(*fo.OplogReplay)
	}
	if fo.Projection != nil {
		proj, err := marshal(fo.Projection, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op.Projection(proj)
	}
	if fo.ReturnKey != nil {
		op.ReturnKey(*fo.ReturnKey)
	}
	if fo.ShowRecordID != nil {
		op.ShowRecordID(*fo.ShowRecordID)
	}
	if fo.Skip != nil {
		op.Skip(*fo.Skip)
	}
	if fo.Snapshot != nil {
		op.Snapshot(*fo.Snapshot)
	}
	if fo.Sort != nil {
		if isUnorderedMap(fo.Sort) {
			return nil, ErrMapForOrderedArgument{"sort"}
		}
		sort, err := marshal(fo.Sort, coll.bsonOpts, coll.registry)
		if err != nil {
			return nil, err
		}
		op.Sort(sort)
	}
	retry := driver.RetryNone
	if coll.client.retryReads {
		retry = driver.RetryOncePerCommand
	}
	op = op.Retry(retry)

	if err = op.Execute(ctx); err != nil {
		return nil, replaceErrors(err)
	}

	bc, err := op.Result(cursorOpts)
	if err != nil {
		return nil, replaceErrors(err)
	}
	return newCursorWithSession(bc, coll.bsonOpts, coll.registry, sess)
}

// FindOne executes a find command and returns a SingleResult for one document in the collection.
//
// The filter parameter must be a document containing query operators and can be used to select the document to be
// returned. It cannot be nil. If the filter does not match any documents, a SingleResult with an error set to
// ErrNoDocuments will be returned. If the filter matches multiple documents, one will be selected from the matched set.
//
// The opts parameter can be used to specify options for this operation (see the options.FindOneOptions documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/find/.
func (coll *Collection) FindOne(ctx context.Context, filter interface{},
	opts ...*options.FindOneOptions) *SingleResult {

	if ctx == nil {
		ctx = context.Background()
	}

	findOpts := make([]*options.FindOptions, 0, len(opts))
	for _, opt := range opts {
		if opt == nil {
			continue
		}
		findOpts = append(findOpts, &options.FindOptions{
			AllowPartialResults: opt.AllowPartialResults,
			BatchSize:           opt.BatchSize,
			Collation:           opt.Collation,
			Comment:             opt.Comment,
			CursorType:          opt.CursorType,
			Hint:                opt.Hint,
			Max:                 opt.Max,
			MaxAwaitTime:        opt.MaxAwaitTime,
			MaxTime:             opt.MaxTime,
			Min:                 opt.Min,
			NoCursorTimeout:     opt.NoCursorTimeout,
			OplogReplay:         opt.OplogReplay,
			Projection:          opt.Projection,
			ReturnKey:           opt.ReturnKey,
			ShowRecordID:        opt.ShowRecordID,
			Skip:                opt.Skip,
			Snapshot:            opt.Snapshot,
			Sort:                opt.Sort,
		})
	}
	// Unconditionally send a limit to make sure only one document is returned and the cursor is not kept open
	// by the server.
	findOpts = append(findOpts, options.Find().SetLimit(-1))

	cursor, err := coll.Find(ctx, filter, findOpts...)
	return &SingleResult{
		ctx:      ctx,
		cur:      cursor,
		bsonOpts: coll.bsonOpts,
		reg:      coll.registry,
		err:      replaceErrors(err),
	}
}

func (coll *Collection) findAndModify(ctx context.Context, op *operation.FindAndModify) *SingleResult {
	if ctx == nil {
		ctx = context.Background()
	}

	sess := sessionFromContext(ctx)
	var err error
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}

	err = coll.client.validSession(sess)
	if err != nil {
		return &SingleResult{err: err}
	}

	wc := coll.writeConcern
	if sess.TransactionRunning() {
		wc = nil
	}
	if !writeconcern.AckWrite(wc) {
		sess = nil
	}

	selector := makePinnedSelector(sess, coll.writeSelector)

	retry := driver.RetryNone
	if coll.client.retryWrites {
		retry = driver.RetryOnce
	}

	op = op.Session(sess).
		WriteConcern(wc).
		CommandMonitor(coll.client.monitor).
		ServerSelector(selector).
		ClusterClock(coll.client.clock).
		Database(coll.db.name).
		Collection(coll.name).
		Deployment(coll.client.deployment).
		Retry(retry).
		Crypt(coll.client.cryptFLE)

	_, err = processWriteError(op.Execute(ctx))
	if err != nil {
		return &SingleResult{err: err}
	}

	return &SingleResult{
		ctx:      ctx,
		rdr:      bson.Raw(op.Result().Value),
		bsonOpts: coll.bsonOpts,
		reg:      coll.registry,
	}
}

// FindOneAndDelete executes a findAndModify command to delete at most one document in the collection. and returns the
// document as it appeared before deletion.
//
// The filter parameter must be a document containing query operators and can be used to select the document to be
// deleted. It cannot be nil. If the filter does not match any documents, a SingleResult with an error set to
// ErrNoDocuments wil be returned. If the filter matches multiple documents, one will be selected from the matched set.
//
// The opts parameter can be used to specify options for the operation (see the options.FindOneAndDeleteOptions
// documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/findAndModify/.
func (coll *Collection) FindOneAndDelete(ctx context.Context, filter interface{},
	opts ...*options.FindOneAndDeleteOptions) *SingleResult {

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return &SingleResult{err: err}
	}
	fod := options.MergeFindOneAndDeleteOptions(opts...)
	op := operation.NewFindAndModify(f).Remove(true).ServerAPI(coll.client.serverAPI).Timeout(coll.client.timeout).
		MaxTime(fod.MaxTime)
	if fod.Collation != nil {
		op = op.Collation(bsoncore.Document(fod.Collation.ToDocument()))
	}
	if fod.Comment != nil {
		comment, err := marshalValue(fod.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Comment(comment)
	}
	if fod.Projection != nil {
		proj, err := marshal(fod.Projection, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Fields(proj)
	}
	if fod.Sort != nil {
		if isUnorderedMap(fod.Sort) {
			return &SingleResult{err: ErrMapForOrderedArgument{"sort"}}
		}
		sort, err := marshal(fod.Sort, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Sort(sort)
	}
	if fod.Hint != nil {
		if isUnorderedMap(fod.Hint) {
			return &SingleResult{err: ErrMapForOrderedArgument{"hint"}}
		}
		hint, err := marshalValue(fod.Hint, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Hint(hint)
	}
	if fod.Let != nil {
		let, err := marshal(fod.Let, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Let(let)
	}

	return coll.findAndModify(ctx, op)
}

// FindOneAndReplace executes a findAndModify command to replace at most one document in the collection
// and returns the document as it appeared before replacement.
//
// The filter parameter must be a document containing query operators and can be used to select the document to be
// replaced. It cannot be nil. If the filter does not match any documents, a SingleResult with an error set to
// ErrNoDocuments wil be returned. If the filter matches multiple documents, one will be selected from the matched set.
//
// The replacement parameter must be a document that will be used to replace the selected document. It cannot be nil
// and cannot contain any update operators (https://www.mongodb.com/docs/manual/reference/operator/update/).
//
// The opts parameter can be used to specify options for the operation (see the options.FindOneAndReplaceOptions
// documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/findAndModify/.
func (coll *Collection) FindOneAndReplace(ctx context.Context, filter interface{},
	replacement interface{}, opts ...*options.FindOneAndReplaceOptions) *SingleResult {

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return &SingleResult{err: err}
	}
	r, err := marshal(replacement, coll.bsonOpts, coll.registry)
	if err != nil {
		return &SingleResult{err: err}
	}
	if firstElem, err := r.IndexErr(0); err == nil && strings.HasPrefix(firstElem.Key(), "$") {
		return &SingleResult{err: errors.New("replacement document cannot contain keys beginning with '$'")}
	}

	fo := options.MergeFindOneAndReplaceOptions(opts...)
	op := operation.NewFindAndModify(f).Update(bsoncore.Value{Type: bsontype.EmbeddedDocument, Data: r}).
		ServerAPI(coll.client.serverAPI).Timeout(coll.client.timeout).MaxTime(fo.MaxTime)
	if fo.BypassDocumentValidation != nil && *fo.BypassDocumentValidation {
		op = op.BypassDocumentValidation(*fo.BypassDocumentValidation)
	}
	if fo.Collation != nil {
		op = op.Collation(bsoncore.Document(fo.Collation.ToDocument()))
	}
	if fo.Comment != nil {
		comment, err := marshalValue(fo.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Comment(comment)
	}
	if fo.Projection != nil {
		proj, err := marshal(fo.Projection, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Fields(proj)
	}
	if fo.ReturnDocument != nil {
		op = op.NewDocument(*fo.ReturnDocument == options.After)
	}
	if fo.Sort != nil {
		if isUnorderedMap(fo.Sort) {
			return &SingleResult{err: ErrMapForOrderedArgument{"sort"}}
		}
		sort, err := marshal(fo.Sort, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Sort(sort)
	}
	if fo.Upsert != nil {
		op = op.Upsert(*fo.Upsert)
	}
	if fo.Hint != nil {
		if isUnorderedMap(fo.Hint) {
			return &SingleResult{err: ErrMapForOrderedArgument{"hint"}}
		}
		hint, err := marshalValue(fo.Hint, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Hint(hint)
	}
	if fo.Let != nil {
		let, err := marshal(fo.Let, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Let(let)
	}

	return coll.findAndModify(ctx, op)
}

// FindOneAndUpdate executes a findAndModify command to update at most one document in the collection and returns the
// document as it appeared before updating.
//
// The filter parameter must be a document containing query operators and can be used to select the document to be
// updated. It cannot be nil. If the filter does not match any documents, a SingleResult with an error set to
// ErrNoDocuments wil be returned. If the filter matches multiple documents, one will be selected from the matched set.
//
// The update parameter must be a document containing update operators
// (https://www.mongodb.com/docs/manual/reference/operator/update/) and can be used to specify the modifications to be made
// to the selected document. It cannot be nil or empty.
//
// The opts parameter can be used to specify options for the operation (see the options.FindOneAndUpdateOptions
// documentation).
//
// For more information about the command, see https://www.mongodb.com/docs/manual/reference/command/findAndModify/.
func (coll *Collection) FindOneAndUpdate(ctx context.Context, filter interface{},
	update interface{}, opts ...*options.FindOneAndUpdateOptions) *SingleResult {

	if ctx == nil {
		ctx = context.Background()
	}

	f, err := marshal(filter, coll.bsonOpts, coll.registry)
	if err != nil {
		return &SingleResult{err: err}
	}

	fo := options.MergeFindOneAndUpdateOptions(opts...)
	op := operation.NewFindAndModify(f).ServerAPI(coll.client.serverAPI).Timeout(coll.client.timeout).
		MaxTime(fo.MaxTime)

	u, err := marshalUpdateValue(update, coll.bsonOpts, coll.registry, true)
	if err != nil {
		return &SingleResult{err: err}
	}
	op = op.Update(u)

	if fo.ArrayFilters != nil {
		af := fo.ArrayFilters
		reg := coll.registry
		if af.Registry != nil {
			reg = af.Registry
		}
		filtersDoc, err := marshalValue(af.Filters, coll.bsonOpts, reg)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.ArrayFilters(filtersDoc.Data)
	}
	if fo.BypassDocumentValidation != nil && *fo.BypassDocumentValidation {
		op = op.BypassDocumentValidation(*fo.BypassDocumentValidation)
	}
	if fo.Collation != nil {
		op = op.Collation(bsoncore.Document(fo.Collation.ToDocument()))
	}
	if fo.Comment != nil {
		comment, err := marshalValue(fo.Comment, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Comment(comment)
	}
	if fo.Projection != nil {
		proj, err := marshal(fo.Projection, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Fields(proj)
	}
	if fo.ReturnDocument != nil {
		op = op.NewDocument(*fo.ReturnDocument == options.After)
	}
	if fo.Sort != nil {
		if isUnorderedMap(fo.Sort) {
			return &SingleResult{err: ErrMapForOrderedArgument{"sort"}}
		}
		sort, err := marshal(fo.Sort, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Sort(sort)
	}
	if fo.Upsert != nil {
		op = op.Upsert(*fo.Upsert)
	}
	if fo.Hint != nil {
		if isUnorderedMap(fo.Hint) {
			return &SingleResult{err: ErrMapForOrderedArgument{"hint"}}
		}
		hint, err := marshalValue(fo.Hint, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Hint(hint)
	}
	if fo.Let != nil {
		let, err := marshal(fo.Let, coll.bsonOpts, coll.registry)
		if err != nil {
			return &SingleResult{err: err}
		}
		op = op.Let(let)
	}

	return coll.findAndModify(ctx, op)
}

// Watch returns a change stream for all changes on the corresponding collection. See
// https://www.mongodb.com/docs/manual/changeStreams/ for more information about change streams.
//
// The Collection must be configured with read concern majority or no read concern for a change stream to be created
// successfully.
//
// The pipeline parameter must be an array of documents, each representing a pipeline stage. The pipeline cannot be
// nil but can be empty. The stage documents must all be non-nil. See https://www.mongodb.com/docs/manual/changeStreams/ for
// a list of pipeline stages that can be used with change streams. For a pipeline of bson.D documents, the
// mongo.Pipeline{} type can be used.
//
// The opts parameter can be used to specify options for change stream creation (see the options.ChangeStreamOptions
// documentation).
func (coll *Collection) Watch(ctx context.Context, pipeline interface{},
	opts ...*options.ChangeStreamOptions) (*ChangeStream, error) {

	csConfig := changeStreamConfig{
		readConcern:    coll.readConcern,
		readPreference: coll.readPreference,
		client:         coll.client,
		bsonOpts:       coll.bsonOpts,
		registry:       coll.registry,
		streamType:     CollectionStream,
		collectionName: coll.Name(),
		databaseName:   coll.db.Name(),
		crypt:          coll.client.cryptFLE,
	}
	return newChangeStream(ctx, csConfig, pipeline, opts...)
}

// Indexes returns an IndexView instance that can be used to perform operations on the indexes for the collection.
func (coll *Collection) Indexes() IndexView {
	return IndexView{coll: coll}
}

// SearchIndexes returns a SearchIndexView instance that can be used to perform operations on the search indexes for the collection.
func (coll *Collection) SearchIndexes() SearchIndexView {
	return SearchIndexView{
		coll: coll,
	}
}

// Drop drops the collection on the server. This method ignores "namespace not found" errors so it is safe to drop
// a collection that does not exist on the server.
func (coll *Collection) Drop(ctx context.Context) error {
	// Follow Client-Side Encryption specification to check for encryptedFields.
	// Drop does not have an encryptedFields option. See: GODRIVER-2413.
	// Check for encryptedFields from the client EncryptedFieldsMap.
	// Check for encryptedFields from the server if EncryptedFieldsMap is set.
	ef := coll.db.getEncryptedFieldsFromMap(coll.name)
	if ef == nil && coll.db.client.encryptedFieldsMap != nil {
		var err error
		if ef, err = coll.db.getEncryptedFieldsFromServer(ctx, coll.name); err != nil {
			return err
		}
	}

	if ef != nil {
		return coll.dropEncryptedCollection(ctx, ef)
	}

	return coll.drop(ctx)
}

// dropEncryptedCollection drops a collection with EncryptedFields.
func (coll *Collection) dropEncryptedCollection(ctx context.Context, ef interface{}) error {
	efBSON, err := marshal(ef, coll.bsonOpts, coll.registry)
	if err != nil {
		return fmt.Errorf("error transforming document: %w", err)
	}

	// Drop the two encryption-related, associated collections: `escCollection` and `ecocCollection`.
	// Drop ESCCollection.
	escCollection, err := csfle.GetEncryptedStateCollectionName(efBSON, coll.name, csfle.EncryptedStateCollection)
	if err != nil {
		return err
	}
	if err := coll.db.Collection(escCollection).drop(ctx); err != nil {
		return err
	}

	// Drop ECOCCollection.
	ecocCollection, err := csfle.GetEncryptedStateCollectionName(efBSON, coll.name, csfle.EncryptedCompactionCollection)
	if err != nil {
		return err
	}
	if err := coll.db.Collection(ecocCollection).drop(ctx); err != nil {
		return err
	}

	// Drop the data collection.
	return coll.drop(ctx)
}

// drop drops a collection without EncryptedFields.
func (coll *Collection) drop(ctx context.Context) error {
	if ctx == nil {
		ctx = context.Background()
	}

	sess := sessionFromContext(ctx)
	if sess == nil && coll.client.sessionPool != nil {
		sess = session.NewImplicitClientSession(coll.client.sessionPool, coll.client.id)
		defer sess.EndSession()
	}

	err := coll.client.validSession(sess)
	if err != nil {
		return err
	}

	wc := coll.writeConcern
	if sess.TransactionRunning() {
		wc = nil
	}
	if !writeconcern.AckWrite(wc) {
		sess = nil
	}

	selector := makePinnedSelector(sess, coll.writeSelector)

	op := operation.NewDropCollection().
		Session(sess).WriteConcern(wc).CommandMonitor(coll.client.monitor).
		ServerSelector(selector).ClusterClock(coll.client.clock).
		Database(coll.db.name).Collection(coll.name).
		Deployment(coll.client.deployment).Crypt(coll.client.cryptFLE).
		ServerAPI(coll.client.serverAPI).Timeout(coll.client.timeout)
	err = op.Execute(ctx)

	// ignore namespace not found errors
	driverErr, ok := err.(driver.Error)
	if !ok || (ok && !driverErr.NamespaceNotFound()) {
		return replaceErrors(err)
	}
	return nil
}

type pinnedServerSelector struct {
	stringer fmt.Stringer
	fallback description.ServerSelector
	session  *session.Client
}

func (pss pinnedServerSelector) String() string {
	if pss.stringer == nil {
		return ""
	}

	return pss.stringer.String()
}

func (pss pinnedServerSelector) SelectServer(
	t description.Topology,
	svrs []description.Server,
) ([]description.Server, error) {
	if pss.session != nil && pss.session.PinnedServer != nil {
		// If there is a pinned server, try to find it in the list of candidates.
		for _, candidate := range svrs {
			if candidate.Addr == pss.session.PinnedServer.Addr {
				return []description.Server{candidate}, nil
			}
		}

		return nil, nil
	}

	return pss.fallback.SelectServer(t, svrs)
}

func makePinnedSelector(sess *session.Client, fallback description.ServerSelector) description.ServerSelector {
	pss := pinnedServerSelector{
		session:  sess,
		fallback: fallback,
	}

	if srvSelectorStringer, ok := fallback.(fmt.Stringer); ok {
		pss.stringer = srvSelectorStringer
	}

	return pss
}

func makeReadPrefSelector(sess *session.Client, selector description.ServerSelector, localThreshold time.Duration) description.ServerSelector {
	if sess != nil && sess.TransactionRunning() {
		selector = description.CompositeSelector([]description.ServerSelector{
			description.ReadPrefSelector(sess.CurrentRp),
			description.LatencySelector(localThreshold),
		})
	}

	return makePinnedSelector(sess, selector)
}

func makeOutputAggregateSelector(sess *session.Client, rp *readpref.ReadPref, localThreshold time.Duration) description.ServerSelector {
	if sess != nil && sess.TransactionRunning() {
		// Use current transaction's read preference if available
		rp = sess.CurrentRp
	}

	selector := description.CompositeSelector([]description.ServerSelector{
		description.OutputAggregateSelector(rp),
		description.LatencySelector(localThreshold),
	})
	return makePinnedSelector(sess, selector)
}

// isUnorderedMap returns true if val is a map with more than 1 element. It is typically used to
// check for unordered Go values that are used in nested command documents where different field
// orders mean different things. Examples are the "sort" and "hint" fields.
func isUnorderedMap(val interface{}) bool {
	refValue := reflect.ValueOf(val)
	return refValue.Kind() == reflect.Map && refValue.Len() > 1
}

Youez - 2016 - github.com/yon3zu
LinuXploit