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263ac0eb45
This simple change switches us to take advantage of the server-maintained data for the pm_conversations system we implemented originally for mobile use. This should make it a lot more convenient to find historical private message conversations, since one can effectively scroll infinitely into the history. We'll need to do some profiling of the backend after this is deployed in production; it's possible we'll need to add some database indexes, denormalization, or other optimizations to avoid making loading the Zulip app significantly slower. Fixes #12502.
84 lines
2.9 KiB
JavaScript
84 lines
2.9 KiB
JavaScript
const Dict = require('./dict').Dict;
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const partners = new Dict();
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exports.set_partner = function (user_id) {
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partners.set(user_id, true);
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};
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exports.is_partner = function (user_id) {
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return partners.get(user_id) || false;
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};
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exports.recent = (function () {
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// This data structure keeps track of the sets of users you've had
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// recent conversations with, sorted by time (implemented via
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// `message_id` sorting, since that's how we time-sort messages).
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const self = {};
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const recent_message_ids = new Dict({fold_case: true}); // key is user_ids_string
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const recent_private_messages = [];
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self.insert = function (user_ids_string, message_id) {
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if (user_ids_string === '') {
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// The API uses '' for self-PMs; convert it to the string
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// containing the current user's ID, which is the format
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// the webapp expects.
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user_ids_string = people.my_current_user_id().toString();
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}
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let conversation = recent_message_ids.get(user_ids_string);
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if (conversation === undefined) {
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// This is a new user, so create a new object.
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conversation = {
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user_ids_string: user_ids_string,
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max_message_id: message_id,
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};
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recent_message_ids.set(user_ids_string, conversation);
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// Optimistically insert the new message at the front, since that
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// is usually where it belongs, but we'll re-sort.
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recent_private_messages.unshift(conversation);
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} else {
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if (conversation.max_message_id >= message_id) {
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// don't backdate our conversation. This is the
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// common code path after initialization when
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// processing old messages, since we'll already have
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// the latest message_id for the conversation from
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// initialization.
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return;
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}
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// update our latest message_id
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conversation.max_message_id = message_id;
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}
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recent_private_messages.sort(function (a, b) {
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return b.max_message_id - a.max_message_id;
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});
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};
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self.get = function () {
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// returns array of structs with user_ids_string and
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// message_id
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return recent_private_messages;
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};
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self.get_strings = function () {
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// returns array of structs with user_ids_string and
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// message_id
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return _.pluck(recent_private_messages, 'user_ids_string');
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};
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self.initialize = function () {
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_.each(page_params.recent_private_conversations, function (conversation) {
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const user_ids_string = conversation.user_ids.join(",");
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self.insert(user_ids_string, conversation.max_message_id);
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});
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delete page_params.recent_private_messages;
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};
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return self;
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}());
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window.pm_conversations = exports;
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