mirror of https://github.com/zulip/zulip.git
79 lines
2.6 KiB
JavaScript
79 lines
2.6 KiB
JavaScript
import {FoldDict} from "./fold_dict";
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import * as people from "./people";
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const partners = new Set();
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export function set_partner(user_id) {
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partners.add(user_id);
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}
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export function is_partner(user_id) {
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return partners.has(user_id);
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}
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class RecentPrivateMessages {
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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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recent_message_ids = new FoldDict(); // key is user_ids_string
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recent_private_messages = [];
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insert(user_ids, message_id) {
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if (user_ids.length === 0) {
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// The server sends [] for self-PMs.
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user_ids = [people.my_current_user_id()];
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}
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user_ids.sort((a, b) => a - b);
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const user_ids_string = user_ids.join(",");
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let conversation = this.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,
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max_message_id: message_id,
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};
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this.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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this.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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this.recent_private_messages.sort((a, b) => b.max_message_id - a.max_message_id);
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}
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get() {
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// returns array of structs with user_ids_string and
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// message_id
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return this.recent_private_messages;
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}
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get_strings() {
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// returns array of structs with user_ids_string and
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// message_id
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return this.recent_private_messages.map((conversation) => conversation.user_ids_string);
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}
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initialize(params) {
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for (const conversation of params.recent_private_conversations) {
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this.insert(conversation.user_ids, conversation.max_message_id);
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}
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}
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}
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export const recent = new RecentPrivateMessages();
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