mirror of https://github.com/zulip/zulip.git
109 lines
3.1 KiB
JavaScript
109 lines
3.1 KiB
JavaScript
/*jslint nomen: true */
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function MessageList(table_name) {
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this._items = [];
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this._hash = {};
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this.table_name = table_name;
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this._selected_id = -1;
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return this;
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}
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MessageList.prototype = {
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get: function MessageList_get(id) {
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id = parseInt(id, 10);
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if (isNaN(id)) {
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return undefined;
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}
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return this._hash[id];
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},
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empty: function MessageList_empty() {
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return this._items.length === 0;
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},
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first: function MessageList_first() {
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return this._items[0];
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},
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last: function MessageList_last() {
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return this._items[this._items.length - 1];
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},
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selected_id: function MessageList_selected_id() {
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return this._selected_id;
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},
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select_id: function MessageList_select_id(id, opts) {
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opts = $.extend({then_scroll: false, use_closest: false}, opts, {id: id, msg_list: this});
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id = parseInt(id, 10);
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if (isNaN(id)) {
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throw (new Error("Bad message id"));
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}
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if (this.get(id) === undefined) {
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if (!opts.use_closest) {
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throw (new Error("Selected message id not in MessageList"));
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} else {
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id = this.closest_id(id);
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opts.id = id;
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}
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}
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this._selected_id = id;
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$(document).trigger($.Event('message_selected.zephyr', opts));
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},
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selected_message: function MessageList_selected_message() {
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return this.get(this._selected_id);
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},
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selected_row: function MessageList_selected_row() {
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return rows.get(this._selected_id, this.table_name);
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},
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closest_id: function MessageList_closest_id(id) {
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if (this._items.length === 0) {
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return -1;
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}
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var closest = util.lower_bound(this._items, id,
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function (a, b) {
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return a.id < b;
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});
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if (closest === this._items.length
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|| (closest !== 0
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&& (id - this._items[closest - 1].id <
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this._items[closest].id - id)))
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{
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closest = closest - 1;
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}
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return this._items[closest].id;
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},
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_add_to_hash: function MessageList__add_to_hash(messages) {
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var self = this;
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messages.forEach(function (elem) {
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var id = parseInt(elem.id, 10);
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if (isNaN(id)) {
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throw (new Error("Bad message id"));
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}
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if (self._hash[id] !== undefined) {
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throw (new Error("Duplicate message added to MessageList"));
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}
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self._hash[id] = elem;
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});
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},
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append: function MessageList_append(messages) {
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this._items = this._items.concat(messages);
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this._add_to_hash(messages);
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},
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prepend: function MessageList_prepend(messages) {
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this._items = messages.concat(this._items);
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this._add_to_hash(messages);
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},
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all: function MessageList_all() {
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return this._items;
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}
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};
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/*jslint nomen: false */
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