Typescript conversion for src/observable/map

.ts-eslintrc.js

@@ -20,6 +20,10 @@ module.exports = {
     rules: {
         "@typescript-eslint/no-floating-promises": 2,
         "@typescript-eslint/no-misused-promises": 2,
-        "semi": ["error", "always"]
+        "no-unused-vars": "off",
+        "@typescript-eslint/no-unused-vars": ["warn"],
+        "no-undef": "off",
+        "semi": ["error", "always"],
+        "@typescript-eslint/explicit-function-return-type": ["error"]
     }
 };

src/domain/SessionPickerViewModel.js

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {SortedArray} from "../observable/index.js";
+import {SortedArray} from "../observable";
 import {ViewModel} from "./ViewModel";
 import {avatarInitials, getIdentifierColorNumber} from "./avatar";
 

src/domain/session/leftpanel/LeftPanelViewModel.js

@@ -20,8 +20,8 @@ import {RoomTileViewModel} from "./RoomTileViewModel.js";
 import {InviteTileViewModel} from "./InviteTileViewModel.js";
 import {RoomBeingCreatedTileViewModel} from "./RoomBeingCreatedTileViewModel.js";
 import {RoomFilter} from "./RoomFilter.js";
-import {ApplyMap} from "../../../observable/map/ApplyMap.js";
-import {addPanelIfNeeded} from "../../navigation/index";
+import {ApplyMap} from "../../../observable";
+import {addPanelIfNeeded} from "../../navigation";
 
 export class LeftPanelViewModel extends ViewModel {
     constructor(options) {

src/domain/session/rightpanel/MemberListViewModel.js

@@ -46,8 +46,8 @@ export class MemberListViewModel extends ViewModel {
             const vm = new MemberTileViewModel(this.childOptions({member, emitChange, mediaRepository}));
             this.nameDisambiguator.disambiguate(vm);
             return vm;
-        }
-        const updater = (vm, params, newMember) => {
+        };
+        const updater = (params, vm, newMember) => {
             vm.updateFrom(newMember);
             this.nameDisambiguator.disambiguate(vm);
         };

src/domain/session/room/timeline/ReactionsViewModel.js

@@ -13,7 +13,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
-import {ObservableMap} from "../../../../observable/map/ObservableMap";
+import {ObservableMap} from "../../../../observable";
 
 export class ReactionsViewModel {
     constructor(parentTile) {

src/lib.ts

@@ -78,8 +78,7 @@ export {
     MappedList,
     AsyncMappedList,
     ConcatList,
-    ObservableMap
-} from "./observable/index";
+} from "./observable";
 export {
     BaseObservableValue,
     ObservableValue,

src/matrix/Session.js

@@ -21,7 +21,7 @@ import {RoomStatus} from "./room/common";
 import {RoomBeingCreated} from "./room/RoomBeingCreated";
 import {Invite} from "./room/Invite.js";
 import {Pusher} from "./push/Pusher";
-import { ObservableMap } from "../observable/index.js";
+import {ObservableMap} from "../observable";
 import {User} from "./User.js";
 import {DeviceMessageHandler} from "./DeviceMessageHandler.js";
 import {Account as E2EEAccount} from "./e2ee/Account.js";
@@ -192,7 +192,7 @@ export class Session {
     /**
      * Enable secret storage by providing the secret storage credential.
      * This will also see if there is a megolm key backup and try to enable that if so.
-     * 
+     *
      * @param  {string} type       either "passphrase" or "recoverykey"
      * @param  {string} credential either the passphrase or the recovery key, depending on the type
      * @return {Promise} resolves or rejects after having tried to enable secret storage
@@ -663,7 +663,7 @@ export class Session {
         if (this._e2eeAccount && deviceOneTimeKeysCount) {
             changes.e2eeAccountChanges = this._e2eeAccount.writeSync(deviceOneTimeKeysCount, txn, log);
         }
-    
+
         const deviceLists = syncResponse.device_lists;
         if (this._deviceTracker && Array.isArray(deviceLists?.changed) && deviceLists.changed.length) {
             await log.wrap("deviceLists", log => this._deviceTracker.writeDeviceChanges(deviceLists.changed, txn, log));
@@ -908,7 +908,7 @@ export class Session {
     Creates an empty (summary isn't loaded) the archived room if it isn't
     loaded already, assuming sync will either remove it (when rejoining) or
     write a full summary adopting it from the joined room when leaving
-    
+
     @internal
     */
     createOrGetArchivedRoomForSync(roomId) {

src/matrix/room/members/MemberList.js

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {ObservableMap} from "../../../observable/map/ObservableMap";
+import {ObservableMap} from "../../../observable";
 import {RetainedValue} from "../../../utils/RetainedValue";
 
 export class MemberList extends RetainedValue {

src/matrix/room/timeline/Timeline.js

@@ -15,7 +15,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {SortedArray, AsyncMappedList, ConcatList, ObservableArray} from "../../../observable/index.js";
+import {SortedArray, AsyncMappedList, ConcatList, ObservableArray} from "../../../observable";
 import {Disposables} from "../../../utils/Disposables";
 import {Direction} from "./Direction";
 import {TimelineReader} from "./persistence/TimelineReader.js";
@@ -45,7 +45,7 @@ export class Timeline {
         });
         this._readerRequest = null;
         this._allEntries = null;
-        /** Stores event entries that we had to fetch from hs/storage for reply previews (because they were not in timeline) */ 
+        /** Stores event entries that we had to fetch from hs/storage for reply previews (because they were not in timeline) */
         this._contextEntriesNotInTimeline = new Map();
         /** Only used to decrypt non-persisted context entries fetched from the homeserver */
         this._decryptEntries = null;
@@ -189,7 +189,7 @@ export class Timeline {
         // before it has any subscriptions, we bail out if this isn't
         // the case yet. This can happen when sync adds or replaces entries
         // before load has finished and the view has subscribed to the timeline.
-        // 
+        //
         // Once the subscription is setup, MappedList will set up the local
         // relations as needed with _applyAndEmitLocalRelationChange,
         // so we're not missing anything by bailing out.
@@ -239,7 +239,7 @@ export class Timeline {
                 if (err.name === "CompareError") {
                     // see FragmentIdComparer, if the replacing entry is on a fragment
                     // that is currently not loaded into the FragmentIdComparer, it will
-                    // throw a CompareError, and it means that the event is not loaded 
+                    // throw a CompareError, and it means that the event is not loaded
                     // in the timeline (like when receiving a relation for an event
                     // that is not loaded in memory) so we can just drop this error as
                     // replacing an event that is not already loaded is a no-op.
@@ -311,7 +311,7 @@ export class Timeline {
      * - timeline
      * - storage
      * - homeserver
-     * @param {EventEntry[]} entries 
+     * @param {EventEntry[]} entries
      */
     async _loadContextEntriesWhereNeeded(entries) {
         for (const entry of entries) {
@@ -392,7 +392,7 @@ export class Timeline {
      * [loadAtTop description]
      * @param  {[type]} amount [description]
      * @return {boolean} true if the top of the timeline has been reached
-     * 
+     *
      */
     async loadAtTop(amount) {
         if (this._disposables.isDisposed) {
@@ -547,7 +547,7 @@ export function tests() {
                 content: {},
                 relatedEventId: event2.event_id
             }}));
-            // 4. subscribe (it's now safe to iterate timeline.entries) 
+            // 4. subscribe (it's now safe to iterate timeline.entries)
             timeline.entries.subscribe(new ListObserver());
             // 5. check the local relation got correctly aggregated
             const locallyRedacted = await poll(() => Array.from(timeline.entries)[0].isRedacting);

src/observable/BaseObservable.ts

@@ -34,7 +34,7 @@ export abstract class BaseObservable<T> {
         if (this._handlers.size === 1) {
             this.onSubscribeFirst();
         }
-        return () => {
+        return (): undefined => {
             return this.unsubscribe(handler);
         };
     }
@@ -63,22 +63,23 @@ export abstract class BaseObservable<T> {
     // Add iterator over handlers here
 }
 
+// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
 export function tests() {
     class Collection extends BaseObservable<{}> {
         firstSubscribeCalls: number = 0;
         firstUnsubscribeCalls: number = 0;
 
-        onSubscribeFirst() { this.firstSubscribeCalls += 1; }
-        onUnsubscribeLast() { this.firstUnsubscribeCalls += 1; }
+        onSubscribeFirst(): void { this.firstSubscribeCalls += 1; }
+        onUnsubscribeLast(): void { this.firstUnsubscribeCalls += 1; }
     }
 
     return {
-        test_unsubscribe(assert) {
+        test_unsubscribe(assert): void {
             const c = new Collection();
             const unsubscribe = c.subscribe({});
             unsubscribe();
             assert.equal(c.firstSubscribeCalls, 1);
             assert.equal(c.firstUnsubscribeCalls, 1);
         }
-    }
+    };
 }

src/observable/ObservableValue.ts

@@ -20,7 +20,7 @@ import type {SubscriptionHandle} from "./BaseObservable";
 
 // like an EventEmitter, but doesn't have an event type
 export abstract class BaseObservableValue<T> extends BaseObservable<(value: T) => void> {
-    emit(argument: T) {
+    emit(argument: T): void {
         for (const h of this._handlers) {
             h(argument);
         }
@@ -68,7 +68,7 @@ class WaitForHandle<T> implements IWaitHandle<T> {
         return this._promise;
     }
 
-    dispose() {
+    dispose(): void {
         if (this._subscription) {
             this._subscription();
             this._subscription = null;
@@ -82,7 +82,7 @@ class WaitForHandle<T> implements IWaitHandle<T> {
 
 class ResolvedWaitForHandle<T> implements IWaitHandle<T> {
     constructor(public promise: Promise<T>) {}
-    dispose() {}
+    dispose(): void {}
 }
 
 export class ObservableValue<T> extends BaseObservableValue<T> {
@@ -113,7 +113,7 @@ export class RetainedObservableValue<T> extends ObservableValue<T> {
         this._freeCallback = freeCallback;
     }
 
-    onUnsubscribeLast() {
+    onUnsubscribeLast(): void {
         super.onUnsubscribeLast();
         this._freeCallback();
     }
@@ -130,15 +130,15 @@ export class FlatMapObservableValue<P, C> extends BaseObservableValue<C | undefi
         super();
     }
 
-    onUnsubscribeLast() {
+    onUnsubscribeLast(): void {
         super.onUnsubscribeLast();
         this.sourceSubscription = this.sourceSubscription!();
         if (this.targetSubscription) {
             this.targetSubscription = this.targetSubscription();
         }
     }
 
-    onSubscribeFirst() {
+    onSubscribeFirst(): void {
         super.onSubscribeFirst();
         this.sourceSubscription = this.source.subscribe(() => {
             this.updateTargetSubscription();
@@ -147,7 +147,7 @@ export class FlatMapObservableValue<P, C> extends BaseObservableValue<C | undefi
         this.updateTargetSubscription();
     }
 
-    private updateTargetSubscription() {
+    private updateTargetSubscription(): void {
         const sourceValue = this.source.get();
         if (sourceValue) {
             const target = this.mapper(sourceValue);
@@ -174,9 +174,10 @@ export class FlatMapObservableValue<P, C> extends BaseObservableValue<C | undefi
     }
 }
 
+// eslint-disable-next-line @typescript-eslint/explicit-function-return-type
 export function tests() {
     return {
-        "set emits an update": assert => {
+        "set emits an update": (assert): void => {
             const a = new ObservableValue<number>(0);
             let fired = false;
             const subscription = a.subscribe(v => {
@@ -187,7 +188,7 @@ export function tests() {
             assert(fired);
             subscription();
         },
-        "set doesn't emit if value hasn't changed": assert => {
+        "set doesn't emit if value hasn't changed": (assert): void => {
             const a = new ObservableValue(5);
             let fired = false;
             const subscription = a.subscribe(() => {
@@ -198,32 +199,32 @@ export function tests() {
             assert(!fired);
             subscription();
         },
-        "waitFor promise resolves on matching update": async assert => {
+        "waitFor promise resolves on matching update": async (assert): Promise<void> => {
             const a = new ObservableValue(5);
             const handle = a.waitFor(v => v === 6);
-            Promise.resolve().then(() => {
+            await Promise.resolve().then(() => {
                 a.set(6);
             });
             await handle.promise;
             assert.strictEqual(a.get(), 6);
         },
-        "waitFor promise rejects when disposed": async assert => {
+        "waitFor promise rejects when disposed": async (assert): Promise<void> => {
             const a = new ObservableValue<number>(0);
             const handle = a.waitFor(() => false);
-            Promise.resolve().then(() => {
+            await Promise.resolve().then(() => {
                 handle.dispose();
             });
             await assert.rejects(handle.promise, AbortError);
         },
-        "flatMap.get": assert => {
+        "flatMap.get": (assert): void => {
             const a = new ObservableValue<undefined | {count: ObservableValue<number>}>(undefined);
             const countProxy = a.flatMap(a => a!.count);
             assert.strictEqual(countProxy.get(), undefined);
             const count = new ObservableValue<number>(0);
             a.set({count});
             assert.strictEqual(countProxy.get(), 0);
         },
-        "flatMap update from source": assert => {
+        "flatMap update from source": (assert): void => {
             const a = new ObservableValue<undefined | {count: ObservableValue<number>}>(undefined);
             const updates: (number | undefined)[] = [];
             a.flatMap(a => a!.count).subscribe(count => {
@@ -233,7 +234,7 @@ export function tests() {
             a.set({count});
             assert.deepEqual(updates, [0]);
         },
-        "flatMap update from target": assert => {
+        "flatMap update from target": (assert): void => {
             const a = new ObservableValue<undefined | {count: ObservableValue<number>}>(undefined);
             const updates: (number | undefined)[] = [];
             a.flatMap(a => a!.count).subscribe(count => {
@@ -244,5 +245,5 @@ export function tests() {
             count.set(5);
             assert.deepEqual(updates, [0, 5]);
         }
-    }
+    };
 }