mirror of https://github.com/zulip/zulip.git
521 lines
17 KiB
JavaScript
521 lines
17 KiB
JavaScript
function MessageListData(opts) {
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this.muting_enabled = opts.muting_enabled;
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if (this.muting_enabled) {
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this._all_items = [];
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}
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this._items = [];
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this._hash = {};
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this._local_only = {};
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this._selected_id = -1;
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var filter = opts.filter;
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if (filter === undefined) {
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filter = new Filter();
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}
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this.filter = filter;
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}
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MessageListData.prototype = {
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all_messages: function () {
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return this._items;
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},
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num_items: function () {
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return this._items.length;
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},
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empty: function () {
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return this._items.length === 0;
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},
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first: function () {
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return this._items[0];
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},
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last: function () {
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return this._items[this._items.length - 1];
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},
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nth_most_recent_id: function (n) {
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var i = this._items.length - n;
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if (i < 0) {
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return -1;
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}
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return this._items[i].id;
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},
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clear: function () {
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if (this.muting_enabled) {
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this._all_items = [];
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}
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this._items = [];
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this._hash = {};
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},
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get: function (id) {
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id = parseFloat(id);
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if (isNaN(id)) {
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return;
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}
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return this._hash[id];
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},
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clear_selected_id: function () {
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this._selected_id = -1;
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},
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selected_id: function () {
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return this._selected_id;
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},
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set_selected_id: function (id) {
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this._selected_id = id;
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},
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selected_idx: function () {
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return this._lower_bound(this._selected_id);
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},
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reset_select_to_closest: function () {
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this._selected_id = this.closest_id(this._selected_id);
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},
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is_search: function () {
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return this.filter.is_search();
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},
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_get_predicate: function () {
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// We cache this.
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if (!this.predicate) {
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this.predicate = this.filter.predicate();
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}
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return this.predicate;
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},
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valid_non_duplicated_messages: function (messages) {
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var predicate = this._get_predicate();
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var self = this;
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return _.filter(messages, function (msg) {
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return self.get(msg.id) === undefined && predicate(msg);
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});
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},
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filter_incoming: function (messages) {
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var predicate = this._get_predicate();
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return _.filter(messages, predicate);
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},
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unmuted_messages: function (messages) {
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return _.reject(messages, function (message) {
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return muting.is_topic_muted(message.stream, message.subject) &&
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!message.mentioned;
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});
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},
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update_items_for_muting: function () {
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if (!this.muting_enabled) {
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return;
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}
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this._items = this.unmuted_messages(this._all_items);
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},
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first_unread_message_id: function () {
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var first_unread = _.find(this._items, function (message) {
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return unread.message_unread(message);
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});
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if (first_unread) {
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return first_unread.id;
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}
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// if no unread, return the bottom message
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return this.last().id;
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},
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update_user_full_name: function (user_id, full_name) {
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_.each(this._items, function (item) {
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if (item.sender_id && (item.sender_id === user_id)) {
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item.sender_full_name = full_name;
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}
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});
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},
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update_user_avatar: function (user_id, avatar_url) {
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// TODO:
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// We may want to de-dup some logic with update_user_full_name,
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// especially if we want to optimize this with some kind of
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// hash that maps sender_id -> messages.
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_.each(this._items, function (item) {
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if (item.sender_id && (item.sender_id === user_id)) {
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item.small_avatar_url = avatar_url;
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}
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});
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},
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update_stream_name: function (stream_id, new_stream_name) {
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_.each(this._items, function (item) {
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if (item.stream_id && (item.stream_id === stream_id)) {
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item.display_recipient = new_stream_name;
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item.stream = new_stream_name;
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}
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});
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},
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add_messages: function (messages) {
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var self = this;
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var top_messages = [];
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var bottom_messages = [];
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var interior_messages = [];
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// If we're initially populating the list, save the messages in
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// bottom_messages regardless
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if (self.selected_id() === -1 && self.empty()) {
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var narrow_messages = self.filter_incoming(messages);
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bottom_messages = _.reject(narrow_messages, function (msg) {
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return self.get(msg.id);
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});
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} else {
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// Filter out duplicates that are already in self, and all messages
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// that fail our filter predicate
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messages = self.valid_non_duplicated_messages(messages);
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_.each(messages, function (msg) {
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// Put messages in correct order on either side of the
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// message list. This code path assumes that messages
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// is a (1) sorted, and (2) consecutive block of
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// messages that belong in this message list; those
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// facts should be ensured by the caller.
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if (self.empty() || msg.id > self.last().id) {
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bottom_messages.push(msg);
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} else if (msg.id < self.first().id) {
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top_messages.push(msg);
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} else {
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interior_messages.push(msg);
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}
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});
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}
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// We return probably more info than our actual callers
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// need, but this is useful for tests and not actually
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// expensive.
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var info = {
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top_messages: top_messages,
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bottom_messages: bottom_messages,
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interior_messages: interior_messages,
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};
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if (interior_messages.length > 0) {
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var all_messages = top_messages.concat(interior_messages).concat(bottom_messages);
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self.add_anywhere(all_messages);
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return info;
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}
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if (top_messages.length > 0) {
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top_messages = self.prepend(top_messages);
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}
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if (bottom_messages.length > 0) {
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bottom_messages = self.append(bottom_messages);
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}
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return info;
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},
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add_anywhere: function (messages) {
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// Caller should have already filtered messages.
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// This should be used internally when we have
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// "interior" messages to add and can't optimize
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// things by only doing prepend or only doing append.
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var viewable_messages;
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if (this.muting_enabled) {
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this._all_items = messages.concat(this._all_items);
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this._all_items.sort(function (a, b) {return a.id - b.id;});
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viewable_messages = this.unmuted_messages(messages);
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this._items = viewable_messages.concat(this._items);
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} else {
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this._items = messages.concat(this._items);
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}
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this._items.sort(function (a, b) {return a.id - b.id;});
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this._add_to_hash(messages);
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return viewable_messages;
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},
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append: function (messages) {
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// Caller should have already filtered
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var viewable_messages;
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if (this.muting_enabled) {
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this._all_items = this._all_items.concat(messages);
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viewable_messages = this.unmuted_messages(messages);
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} else {
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viewable_messages = messages;
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}
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this._items = this._items.concat(viewable_messages);
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this._add_to_hash(messages);
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return viewable_messages;
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},
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prepend: function (messages) {
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// Caller should have already filtered
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var viewable_messages;
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if (this.muting_enabled) {
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this._all_items = messages.concat(this._all_items);
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viewable_messages = this.unmuted_messages(messages);
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} else {
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viewable_messages = messages;
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}
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this._items = viewable_messages.concat(this._items);
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this._add_to_hash(messages);
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return viewable_messages;
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},
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remove: function (messages) {
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var self = this;
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_.each(messages, function (message) {
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var stored_message = self._hash[message.id];
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if (stored_message !== undefined) {
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delete self._hash[stored_message];
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}
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delete self._local_only[message.id];
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});
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var msg_ids_to_remove = {};
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_.each(messages, function (message) {
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msg_ids_to_remove[message.id] = true;
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});
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this._items = _.filter(this._items, function (message) {
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return !msg_ids_to_remove.hasOwnProperty(message.id);
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});
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if (this.muting_enabled) {
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this._all_items = _.filter(this._all_items, function (message) {
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return !msg_ids_to_remove.hasOwnProperty(message.id);
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});
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}
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},
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// Returns messages from the given message list in the specified range, inclusive
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message_range: function (start, end) {
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if (start === -1) {
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blueslip.error("message_range given a start of -1");
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}
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var start_idx = this._lower_bound(start);
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var end_idx = this._lower_bound(end);
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return this._items.slice(start_idx, end_idx + 1);
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},
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// Returns the index where you could insert the desired ID
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// into the message list, without disrupting the sort order
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// This takes into account the potentially-unsorted
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// nature of local message IDs in the message list
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_lower_bound: function (id) {
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var self = this;
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function less_func(msg, ref_id, a_idx) {
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if (self._is_localonly_id(msg.id)) {
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// First non-local message before this one
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var effective = self._next_nonlocal_message(self._items, a_idx,
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function (idx) { return idx - 1; });
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if (effective) {
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// Turn the 10.02 in [11, 10.02, 12] into 11.02
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var decimal = parseFloat((msg.id % 1).toFixed(0.02));
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var effective_id = effective.id + decimal;
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return effective_id < ref_id;
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}
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}
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return msg.id < ref_id;
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}
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return util.lower_bound(self._items, id, less_func);
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},
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closest_id: function (id) {
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// We directly keep track of local-only messages,
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// so if we're asked for one that we know we have,
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// just return it directly
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if (this._local_only.hasOwnProperty(id)) {
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return id;
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}
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var items = this._items;
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if (items.length === 0) {
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return -1;
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}
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var closest = this._lower_bound(id);
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if (closest < items.length && id === items[closest].id) {
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return items[closest].id;
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}
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var potential_closest_matches = [];
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if (closest > 0 && this._is_localonly_id(items[closest - 1].id)) {
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// Since we treated all blocks of local ids as their left-most-non-local message
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// for lower_bound purposes, find the real leftmost index (first non-local id)
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do {
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potential_closest_matches.push(closest);
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closest -= 1;
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} while (closest > 0 && this._is_localonly_id(items[closest - 1].id));
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}
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potential_closest_matches.push(closest);
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if (closest === items.length) {
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closest = closest - 1;
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} else {
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// Any of the ids that we skipped over (due to them being local-only) might be the
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// closest ID to the desired one, in case there is no exact match.
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potential_closest_matches.unshift(_.last(potential_closest_matches) - 1);
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var best_match = items[closest].id;
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_.each(potential_closest_matches, function (potential_idx) {
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if (potential_idx < 0) {
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return;
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}
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var item = items[potential_idx];
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if (item === undefined) {
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blueslip.warn('Invalid potential_idx: ' + potential_idx);
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return;
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}
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var potential_match = item.id;
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// If the potential id is the closest to the requested, save that one
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if (Math.abs(id - potential_match) < Math.abs(best_match - id)) {
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best_match = potential_match;
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closest = potential_idx;
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}
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});
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}
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return items[closest].id;
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},
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advance_past_messages: function (msg_ids) {
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// Start with the current pointer, but then keep advancing the
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// pointer while the next message's id is in msg_ids. See trac #1555
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// for more context, but basically we are skipping over contiguous
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// messages that we have recently visited.
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var next_msg_id = 0;
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var id_set = {};
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_.each(msg_ids, function (msg_id) {
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id_set[msg_id] = true;
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});
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var idx = this.selected_idx() + 1;
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while (idx < this._items.length) {
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var msg_id = this._items[idx].id;
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if (!id_set[msg_id]) {
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break;
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}
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next_msg_id = msg_id;
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idx += 1;
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}
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if (next_msg_id > 0) {
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this.set_selected_id(next_msg_id);
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}
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},
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_add_to_hash: function (messages) {
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var self = this;
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messages.forEach(function (elem) {
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var id = parseFloat(elem.id);
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if (isNaN(id)) {
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blueslip.fatal("Bad message id");
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}
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if (self._is_localonly_id(id)) {
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self._local_only[id] = elem;
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}
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if (self._hash[id] !== undefined) {
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blueslip.error("Duplicate message added to MessageListData");
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return;
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}
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self._hash[id] = elem;
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});
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},
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_is_localonly_id: function (id) {
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return id % 1 !== 0;
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},
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_next_nonlocal_message: function (item_list, start_index, op) {
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var cur_idx = start_index;
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do {
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cur_idx = op(cur_idx);
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} while (item_list[cur_idx] !== undefined && this._is_localonly_id(item_list[cur_idx].id));
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return item_list[cur_idx];
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},
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change_message_id: function (old_id, new_id, opts) {
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// Update our local cache that uses the old id to the new id
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function message_sort_func(a, b) {return a.id - b.id;}
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if (this._hash.hasOwnProperty(old_id)) {
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var msg = this._hash[old_id];
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delete this._hash[old_id];
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this._hash[new_id] = msg;
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} else {
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return;
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}
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if (this._local_only.hasOwnProperty(old_id)) {
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if (this._is_localonly_id(new_id)) {
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this._local_only[new_id] = this._local_only[old_id];
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}
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delete this._local_only[old_id];
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}
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if (this._selected_id === old_id) {
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this._selected_id = new_id;
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}
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// If this message is now out of order, re-order and re-render
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var self = this;
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setTimeout(function () {
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var current_message = self._hash[new_id];
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var index = self._items.indexOf(current_message);
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if (index === -1) {
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if (!self.muting_enabled && opts.is_current_list()) {
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blueslip.error("Trying to re-order message but can't find message with new_id in _items!");
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}
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return;
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}
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var next = self._next_nonlocal_message(self._items, index,
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function (idx) { return idx + 1; });
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var prev = self._next_nonlocal_message(self._items, index,
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function (idx) { return idx - 1; });
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if ((next !== undefined && current_message.id > next.id) ||
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(prev !== undefined && current_message.id < prev.id)) {
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blueslip.debug("Changed message ID from server caused out-of-order list, reordering");
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self._items.sort(message_sort_func);
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if (self.muting_enabled) {
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self._all_items.sort(message_sort_func);
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}
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opts.re_render();
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}
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}, 0);
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},
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get_last_message_sent_by_me: function () {
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var msg_index = _.findLastIndex(this._items, {sender_id: page_params.user_id});
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if (msg_index === -1) {
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return;
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}
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var msg = this._items[msg_index];
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return msg;
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},
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};
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if (typeof module !== 'undefined') {
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module.exports = MessageListData;
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}
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