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Add initial translation of TimelineEventStore.js

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This commit is contained in:
Danila Fedorin 2021-08-11 13:38:33 -07:00
parent 53228e88a2
commit 88ecc58b14
1 changed files with 90 additions and 61 deletions
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151
src/matrix/storage/idb/stores/TimelineEventStore.ts
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@ -18,22 +18,48 @@ import {EventKey} from "../../../room/timeline/EventKey.js";
import { StorageError } from "../../common";
import { encodeUint32 } from "../utils";
import {KeyLimits} from "../../common";
import {Store} from "../Store";
function encodeKey(roomId, fragmentId, eventIndex) {
interface Annotation {
count: number
me: boolean
firstTimestamp: number
}
interface StorageEntry {
roomId: string
fragmentId: number
eventIndex: number
event: any
displayName?: string
avatarUrl?: string
annotations?: { [key : string]: Annotation }
key: string
eventIdKey: string
}
function encodeKey(roomId: string, fragmentId: number, eventIndex: number): string {
return `${roomId}|${encodeUint32(fragmentId)}|${encodeUint32(eventIndex)}`;
}
function encodeEventIdKey(roomId, eventId) {
function encodeEventIdKey(roomId: string, eventId: string): string {
return `${roomId}|${eventId}`;
}
function decodeEventIdKey(eventIdKey) {
function decodeEventIdKey(eventIdKey: string): { roomId: string, eventId: string } {
const [roomId, eventId] = eventIdKey.split("|");
return {roomId, eventId};
}
class Range {
constructor(IDBKeyRange, only, lower, upper, lowerOpen, upperOpen) {
private _IDBKeyRange: any // TODO what's the appropriate representation here?
private _only?: EventKey
private _lower?: EventKey
private _upper?: EventKey
private _lowerOpen: boolean
private _upperOpen: boolean
constructor(IDBKeyRange: any, only?: EventKey, lower?: EventKey, upper?: EventKey, lowerOpen: boolean = false, upperOpen: boolean = false) {
this._IDBKeyRange = IDBKeyRange;
this._only = only;
this._lower = lower;
@ -42,7 +68,7 @@ class Range {
this._upperOpen = upperOpen;
}
asIDBKeyRange(roomId) {
asIDBKeyRange(roomId: string) {
try {
// only
if (this._only) {
@ -99,66 +125,68 @@ class Range {
* @property {?Gap} gap if a gap entry, the gap
*/
export class TimelineEventStore {
constructor(timelineStore) {
private _timelineStore: Store<StorageEntry>
constructor(timelineStore: Store<StorageEntry>) {
this._timelineStore = timelineStore;
}
/** Creates a range that only includes the given key
* @param {EventKey} eventKey the key
* @return {Range} the created range
* @param eventKey the key
* @return the created range
*/
onlyRange(eventKey) {
onlyRange(eventKey: EventKey): Range {
return new Range(this._timelineStore.IDBKeyRange, eventKey);
}
/** Creates a range that includes all keys before eventKey, and optionally also the key itself.
* @param {EventKey} eventKey the key
* @param {boolean} [open=false] whether the key is included (false) or excluded (true) from the range at the upper end.
* @return {Range} the created range
* @param eventKey the key
* @param [open=false] whether the key is included (false) or excluded (true) from the range at the upper end.
* @return the created range
*/
upperBoundRange(eventKey, open=false) {
upperBoundRange(eventKey: EventKey, open=false): Range {
return new Range(this._timelineStore.IDBKeyRange, undefined, undefined, eventKey, undefined, open);
}
/** Creates a range that includes all keys after eventKey, and optionally also the key itself.
* @param {EventKey} eventKey the key
* @param {boolean} [open=false] whether the key is included (false) or excluded (true) from the range at the lower end.
* @return {Range} the created range
* @param eventKey the key
* @param [open=false] whether the key is included (false) or excluded (true) from the range at the lower end.
* @return the created range
*/
lowerBoundRange(eventKey, open=false) {
lowerBoundRange(eventKey: EventKey, open=false): Range {
return new Range(this._timelineStore.IDBKeyRange, undefined, eventKey, undefined, open);
}
/** Creates a range that includes all keys between `lower` and `upper`, and optionally the given keys as well.
* @param {EventKey} lower the lower key
* @param {EventKey} upper the upper key
* @param {boolean} [lowerOpen=false] whether the lower key is included (false) or excluded (true) from the range.
* @param {boolean} [upperOpen=false] whether the upper key is included (false) or excluded (true) from the range.
* @return {Range} the created range
* @param lower the lower key
* @param upper the upper key
* @param [lowerOpen=false] whether the lower key is included (false) or excluded (true) from the range.
* @param [upperOpen=false] whether the upper key is included (false) or excluded (true) from the range.
* @return the created range
*/
boundRange(lower, upper, lowerOpen=false, upperOpen=false) {
boundRange(lower: EventKey, upper: EventKey, lowerOpen=false, upperOpen=false): Range {
return new Range(this._timelineStore.IDBKeyRange, undefined, lower, upper, lowerOpen, upperOpen);
}
/** Looks up the last `amount` entries in the timeline for `roomId`.
* @param {string} roomId
* @param {number} fragmentId
* @param {number} amount
* @return {Promise<Entry[]>} a promise resolving to an array with 0 or more entries, in ascending order.
* @param roomId
* @param fragmentId
* @param amount
* @return a promise resolving to an array with 0 or more entries, in ascending order.
*/
async lastEvents(roomId, fragmentId, amount) {
async lastEvents(roomId: string, fragmentId: number, amount: number): Promise<StorageEntry[]> {
const eventKey = EventKey.maxKey;
eventKey.fragmentId = fragmentId;
return this.eventsBefore(roomId, eventKey, amount);
}
/** Looks up the first `amount` entries in the timeline for `roomId`.
* @param {string} roomId
* @param {number} fragmentId
* @param {number} amount
* @return {Promise<Entry[]>} a promise resolving to an array with 0 or more entries, in ascending order.
* @param roomId
* @param fragmentId
* @param amount
* @return a promise resolving to an array with 0 or more entries, in ascending order.
*/
async firstEvents(roomId, fragmentId, amount) {
async firstEvents(roomId: string, fragmentId: number, amount: number): Promise<StorageEntry[]> {
const eventKey = EventKey.minKey;
eventKey.fragmentId = fragmentId;
return this.eventsAfter(roomId, eventKey, amount);
@ -166,24 +194,24 @@ export class TimelineEventStore {
/** Looks up `amount` entries after `eventKey` in the timeline for `roomId` within the same fragment.
* The entry for `eventKey` is not included.
* @param {string} roomId
* @param {EventKey} eventKey
* @param {number} amount
* @return {Promise<Entry[]>} a promise resolving to an array with 0 or more entries, in ascending order.
* @param roomId
* @param eventKey
* @param amount
* @return a promise resolving to an array with 0 or more entries, in ascending order.
*/
eventsAfter(roomId, eventKey, amount) {
eventsAfter(roomId: string, eventKey: EventKey, amount: number): Promise<StorageEntry[]> {
const idbRange = this.lowerBoundRange(eventKey, true).asIDBKeyRange(roomId);
return this._timelineStore.selectLimit(idbRange, amount);
}
/** Looks up `amount` entries before `eventKey` in the timeline for `roomId` within the same fragment.
* The entry for `eventKey` is not included.
* @param {string} roomId
* @param {EventKey} eventKey
* @param {number} amount
* @return {Promise<Entry[]>} a promise resolving to an array with 0 or more entries, in ascending order.
* @param roomId
* @param eventKey
* @param amount
* @return a promise resolving to an array with 0 or more entries, in ascending order.
*/
async eventsBefore(roomId, eventKey, amount) {
async eventsBefore(roomId: string, eventKey: EventKey, amount: number): Promise<StorageEntry[]> {
const range = this.upperBoundRange(eventKey, true).asIDBKeyRange(roomId);
const events = await this._timelineStore.selectLimitReverse(range, amount);
events.reverse(); // because we fetched them backwards
@ -195,20 +223,20 @@ export class TimelineEventStore {
*
* The order in which results are returned might be different than `eventIds`.
* Call the return value to obtain the next {id, event} pair.
* @param {string} roomId
* @param {string[]} eventIds
* @return {Function<Promise>}
* @param roomId
* @param eventIds
* @return
*/
// performance comment from above refers to the fact that there *might*
// be a correlation between event_id sorting order and chronology.
// In that case we could avoid running over all eventIds, as the reported order by findExistingKeys
// would match the order of eventIds. That's why findLast is also passed as backwards to keysExist.
// also passing them in chronological order makes sense as that's how we'll receive them almost always.
async findFirstOccurringEventId(roomId, eventIds) {
async findFirstOccurringEventId(roomId: string, eventIds: string[]): Promise<string | undefined> {
const byEventId = this._timelineStore.index("byEventId");
const keys = eventIds.map(eventId => encodeEventIdKey(roomId, eventId));
const results = new Array(keys.length);
let firstFoundKey;
let firstFoundKey: string | undefined;
// find first result that is found and has no undefined results before it
function firstFoundAndPrecedingResolved() {
@ -222,7 +250,8 @@ export class TimelineEventStore {
}
await byEventId.findExistingKeys(keys, false, (key, found) => {
const index = keys.indexOf(key);
// T[].search(T, number), but we want T[].search(R, number), so cast
const index = (keys as IDBValidKey[]).indexOf(key);
results[index] = found;
firstFoundKey = firstFoundAndPrecedingResolved();
return !!firstFoundKey;
@ -231,38 +260,38 @@ export class TimelineEventStore {
}
/** Inserts a new entry into the store. The combination of roomId and eventKey should not exist yet, or an error is thrown.
* @param {Entry} entry the entry to insert
* @return {Promise<>} a promise resolving to undefined if the operation was successful, or a StorageError if not.
* @param entry the entry to insert
* @return a promise resolving to undefined if the operation was successful, or a StorageError if not.
* @throws {StorageError} ...
*/
insert(entry) {
insert(entry: StorageEntry): Promise<IDBValidKey> {
entry.key = encodeKey(entry.roomId, entry.fragmentId, entry.eventIndex);
entry.eventIdKey = encodeEventIdKey(entry.roomId, entry.event.event_id);
// TODO: map error? or in idb/store?
this._timelineStore.add(entry);
return this._timelineStore.add(entry);
}
/** Updates the entry into the store with the given [roomId, eventKey] combination.
* If not yet present, will insert. Might be slower than add.
* @param {Entry} entry the entry to update.
* @return {Promise<>} a promise resolving to undefined if the operation was successful, or a StorageError if not.
* @param entry the entry to update.
* @return a promise resolving to undefined if the operation was successful, or a StorageError if not.
*/
update(entry) {
this._timelineStore.put(entry);
update(entry: StorageEntry): Promise<IDBValidKey> {
return this._timelineStore.put(entry);
}
get(roomId, eventKey) {
get(roomId: string, eventKey: EventKey): Promise<StorageEntry | null> {
return this._timelineStore.get(encodeKey(roomId, eventKey.fragmentId, eventKey.eventIndex));
}
getByEventId(roomId, eventId) {
getByEventId(roomId: string, eventId: string): Promise<StorageEntry | null> {
return this._timelineStore.index("byEventId").get(encodeEventIdKey(roomId, eventId));
}
removeAllForRoom(roomId) {
removeAllForRoom(roomId: string): Promise<undefined> {
const minKey = encodeKey(roomId, KeyLimits.minStorageKey, KeyLimits.minStorageKey);
const maxKey = encodeKey(roomId, KeyLimits.maxStorageKey, KeyLimits.maxStorageKey);
const range = this._timelineStore.IDBKeyRange.bound(minKey, maxKey);
this._timelineStore.delete(range);
return this._timelineStore.delete(range);
}
}