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%%%------------------------------------------------------------------- |
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%%% @copyright (C) 2019 Erlang Solutions Ltd. |
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%%% @end |
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%%%------------------------------------------------------------------- |
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%%% @doc |
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%%% RDBMS backend for mod_event_pusher_push. |
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%%% @end |
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%%%------------------------------------------------------------------- |
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-module(mod_event_pusher_push_rdbms). |
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-behavior(mod_event_pusher_push_backend). |
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-include("mongoose.hrl"). |
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-include_lib("jid/include/jid.hrl"). |
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%%-------------------------------------------------------------------- |
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%% Exports |
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%%-------------------------------------------------------------------- |
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-export([init/2]). |
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-export([enable/4, |
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disable/1, |
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disable/3, |
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get_publish_services/1]). |
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%%-------------------------------------------------------------------- |
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%% Backend callbacks |
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%%-------------------------------------------------------------------- |
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-spec init(Host :: jid:server(), Opts :: list()) -> ok. |
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init(_Host, _Opts) -> |
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prepare_queries(). |
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-spec enable(User, PubSub, Node, Form) -> Result when |
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User :: jid:jid(), |
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PubSub :: jid:jid(), |
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Node :: mod_event_pusher_push:pubsub_node(), |
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Form :: mod_event_pusher_push:form(), |
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Result :: ok | {error, term()}. |
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enable(#jid{lserver = LServer} = User, PubSub, Node, Forms) -> |
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ExtUser = jid:to_binary(jid:to_lus(User)), |
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ExtPubSub = jid:to_binary(PubSub), |
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ExtForms = encode_form(Forms), |
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execute_delete(LServer, ExtUser, Node, ExtPubSub), |
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CreatedAt = os:system_time(microsecond), |
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case execute_insert(LServer, ExtUser, Node, ExtPubSub, ExtForms, CreatedAt) of |
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{updated, 1} -> ok; |
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Other -> Other |
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end. |
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-spec disable(User :: jid:jid()) -> ok. |
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disable(#jid{lserver = LServer} = User) -> |
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ExtUser = jid:to_binary(jid:to_lus(User)), |
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execute_delete(LServer, ExtUser), |
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ok. |
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-spec disable(User :: jid:jid(), PubSub :: jid:jid(), |
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Node :: mod_event_pusher_push:pubsub_node() | undefined) -> ok. |
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disable(#jid{lserver = LServer} = User, PubSub, undefined) -> |
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ExtUser = jid:to_binary(jid:to_lus(User)), |
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ExtPubSub = jid:to_binary(PubSub), |
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execute_delete(LServer, ExtUser, ExtPubSub), |
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ok; |
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disable(#jid{lserver = LServer} = User, PubSub, Node) -> |
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ExtUser = jid:to_binary(jid:to_lus(User)), |
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ExtPubSub = jid:to_binary(PubSub), |
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execute_delete(LServer, ExtUser, Node, ExtPubSub), |
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ok. |
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-spec get_publish_services(User :: jid:jid()) -> |
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{ok, [{PubSub :: jid:jid(), |
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Node :: mod_event_pusher_push:pubsub_node(), |
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Form :: mod_event_pusher_push:form()}]}. |
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get_publish_services(#jid{lserver = LServer} = User) -> |
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ExtUser = jid:to_binary(jid:to_lus(User)), |
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{selected, Rows} = execute_select(LServer, ExtUser), |
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{ok, decode_rows(Rows)}. |
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decode_rows(Rows) -> |
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[decode_row(Row) || Row <- Rows]. |
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decode_row({NodeID, PubSubBin, FormJSON}) -> |
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{jid:from_binary(PubSubBin), |
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NodeID, |
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decode_form(FormJSON)}. |
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encode_form(Forms) -> |
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jiffy:encode({Forms}). |
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decode_form(FormJSON) -> |
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{Items} = jiffy:decode(FormJSON), |
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Items. |
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%% Prepared queries |
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-spec prepare_queries() -> ok. |
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prepare_queries() -> |
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mongoose_rdbms:prepare(event_pusher_push_insert, event_pusher_push_subscription, |
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[owner_jid, node, pubsub_jid, form, created_at], |
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<<"INSERT INTO event_pusher_push_subscription VALUES (?, ?, ?, ?, ?)">>), |
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mongoose_rdbms:prepare(event_pusher_push_select, event_pusher_push_subscription, |
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[owner_jid], |
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<<"SELECT node, pubsub_jid, form FROM event_pusher_push_subscription " |
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"WHERE owner_jid = ?">>), |
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mongoose_rdbms:prepare(event_pusher_push_delete, event_pusher_push_subscription, |
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[owner_jid], |
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<<"DELETE FROM event_pusher_push_subscription " |
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"WHERE owner_jid = ?">>), |
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mongoose_rdbms:prepare(event_pusher_push_delete_pubsub_jid, event_pusher_push_subscription, |
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[owner_jid, pubsub_jid], |
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<<"DELETE FROM event_pusher_push_subscription " |
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"WHERE owner_jid = ? AND pubsub_jid = ?">>), |
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mongoose_rdbms:prepare(event_pusher_push_delete_node, event_pusher_push_subscription, |
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[owner_jid, node, pubsub_jid], |
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<<"DELETE FROM event_pusher_push_subscription " |
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"WHERE owner_jid = ? AND node = ? AND pubsub_jid = ?">>), |
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ok. |
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-spec execute_insert(jid:lserver(), jid:literal_jid(), mod_event_pusher_push:pubsub_node(), |
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jid:literal_jid(), iodata(), non_neg_integer()) -> |
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mongoose_rdbms:query_result(). |
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execute_insert(LServer, OwnerJid, Node, PubSubJid, Form, CreatedAt) -> |
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mongoose_rdbms:execute_successfully(LServer, event_pusher_push_insert, |
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[OwnerJid, Node, PubSubJid, Form, CreatedAt]). |
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-spec execute_select(jid:lserver(), jid:literal_jid()) -> mongoose_rdbms:query_result(). |
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execute_select(LServer, OwnerJid) -> |
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mongoose_rdbms:execute_successfully(LServer, event_pusher_push_select, [OwnerJid]). |
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-spec execute_delete(jid:lserver(), jid:literal_jid()) -> mongoose_rdbms:query_result(). |
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execute_delete(LServer, OwnerJid) -> |
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mongoose_rdbms:execute_successfully(LServer, event_pusher_push_delete, [OwnerJid]). |
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-spec execute_delete(jid:lserver(), jid:literal_jid(), jid:literal_jid()) -> |
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mongoose_rdbms:query_result(). |
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execute_delete(LServer, OwnerJid, PubSubJid) -> |
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mongoose_rdbms:execute_successfully(LServer, event_pusher_push_delete_pubsub_jid, |
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[OwnerJid, PubSubJid]). |
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-spec execute_delete(jid:lserver(), jid:literal_jid(), mod_event_pusher_push:pubsub_node(), |
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jid:literal_jid()) -> |
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mongoose_rdbms:query_result(). |
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execute_delete(LServer, OwnerJid, Node, PubSubJid) -> |
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mongoose_rdbms:execute_successfully(LServer, event_pusher_push_delete_node, |
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[OwnerJid, Node, PubSubJid]). |