mirror of https://github.com/zulip/zulip.git
57 lines
1.7 KiB
JavaScript
57 lines
1.7 KiB
JavaScript
function truncate_precision(float) {
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return parseFloat(float.toFixed(3));
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}
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exports.now = function () {
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const timestamp = new XDate().getTime() / 1000;
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return timestamp;
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};
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exports.insert_message = function (message) {
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// It is a little bit funny to go through the message_events
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// codepath, but it's sort of the idea behind local echo that
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// we are simulating server events before they actually arrive.
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message_events.insert_new_messages([message], true);
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};
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exports.get_next_id_float = (function () {
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const already_used = new Set();
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return function () {
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const local_id_increment = 0.01;
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let latest = page_params.max_message_id;
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if (typeof message_list.all !== 'undefined' && message_list.all.last() !== undefined) {
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latest = message_list.all.last().id;
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}
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latest = Math.max(0, latest);
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const local_id_float = truncate_precision(latest + local_id_increment);
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if (already_used.has(local_id_float)) {
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// If our id is already used, it is probably an edge case like we had
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// to abort a very recent message.
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blueslip.warn("We don't reuse ids for local echo.");
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return;
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}
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if (local_id_float % 1 > local_id_increment * 5) {
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blueslip.warn("Turning off local echo for this message to let host catch up");
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return;
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}
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if (local_id_float % 1 === 0) {
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// The logic to stop at 0.05 should prevent us from ever wrapping around
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// to the next integer.
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blueslip.error("Programming error");
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return;
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}
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already_used.add(local_id_float);
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return local_id_float;
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};
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}());
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window.local_message = exports;
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