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chunk is in reverse-chronological order for backward pagination

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Bruno Windels 2019-06-02 18:15:40 +02:00
parent e3b4f898d0
commit ef5d2cfa08
1 changed files with 10 additions and 8 deletions
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18
src/matrix/room/timeline/persistence/GapWriter.js
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@ -43,15 +43,17 @@ export default class GapWriter {
} }
_storeEvents(events, startKey, direction, txn) { _storeEvents(events, startKey, direction, txn) {
const entries = new Array(events.length); const entries = [];
const reducer = direction.isBackward ? Array.prototype.reduceRight : Array.prototype.reduce; // events is in reverse chronological order for backwards pagination,
reducer.call(events, (key, event, i) => { // e.g. order is moving away from the `from` point.
let key = startKey;
for(let event of events) {
key = key.nextKeyForDirection(direction); key = key.nextKeyForDirection(direction);
const eventEntry = createEventEntry(key, this._roomId, event); const eventStorageEntry = createEventEntry(key, this._roomId, event);
txn.timelineEvents.insert(eventEntry); txn.timelineEvents.insert(eventStorageEntry);
entries[i] = new EventEntry(eventEntry, this._fragmentIdComparer); const eventEntry = new EventEntry(eventStorageEntry, this._fragmentIdComparer);
return key; directionalAppend(entries, eventEntry, direction);
}, startKey); }
return entries; return entries;
} }