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MatrixChat: Create an event index and start crawling for events.

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This patch adds support to create an event index if the clients platform
supports it and starts an event crawler.

The event crawler goes through the room history of encrypted rooms and
eventually indexes the whole room history of such rooms.

It does this by first creating crawling checkpoints and storing them
inside a database. A checkpoint consists of a room_id, direction and
token.

After the checkpoints are added the client starts a crawler method in
the background. The crawler goes through checkpoints in a round-robin
way and uses them to fetch historic room messages using the
rooms/roomId/messages API endpoint.

Every time messages are fetched a new checkpoint is created that will
be stored in the database with the fetched events in an atomic way, the
old checkpoint is deleted at the same time as well.
This commit is contained in:
Damir Jelić 2019-10-11 16:43:53 +02:00
parent b8a3ee1841
commit 9ce478cb0e
2 changed files with 235 additions and 0 deletions
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4
src/MatrixClientPeg.js
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@ -30,6 +30,7 @@ import {verificationMethods} from 'matrix-js-sdk/lib/crypto';
import MatrixClientBackedSettingsHandler from "./settings/handlers/MatrixClientBackedSettingsHandler";
import * as StorageManager from './utils/StorageManager';
import IdentityAuthClient from './IdentityAuthClient';
import PlatformPeg from "./PlatformPeg";
interface MatrixClientCreds {
homeserverUrl: string,
@ -222,6 +223,9 @@ class MatrixClientPeg {
this.matrixClient = createMatrixClient(opts);
const platform = PlatformPeg.get();
if (platform.supportsEventIndexing()) platform.initEventIndex(creds.userId);
// we're going to add eventlisteners for each matrix event tile, so the
// potential number of event listeners is quite high.
this.matrixClient.setMaxListeners(500);