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message_util: Extract get_topics_for_message_ids.

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This commit is contained in:
Aman Agrawal
2020-08-07 07:15:47 +00:00
committed by Tim Abbott
parent b7874ac82e
commit 93a41e95a1
3 changed files with 21 additions and 28 deletions
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19
static/js/message_util.js
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@@ -78,4 +78,23 @@ exports.get_max_message_id_in_stream = function (stream_id) {
return max_message_id;
};
exports.get_topics_for_message_ids = function (message_ids) {
const topics = new Map(); // key = stream_id:topic
for (const msg_id of message_ids) {
// message_store still has data on deleted messages when this runs.
const message = message_store.get(msg_id);
if (message === undefined) {
// We may not have the deleted message cached locally in
// message_store; if so, we can just skip processing it.
continue;
}
if (message.type === "stream") {
// Create unique keys for stream_id and topic.
const topic_key = message.stream_id + ":" + message.topic;
topics.set(topic_key, [message.stream_id, message.topic]);
}
}
return topics;
};
window.message_util = exports;