convert Direction to ts

src/matrix/room/timeline/Direction.ts

@@ -15,34 +15,29 @@ limitations under the License.
 */
 
 export class Direction {
-    constructor(isForward) {
+    constructor(public readonly isForward: boolean) {
-        this._isForward = isForward;
     }
 
-    get isForward() {
+    get isBackward(): boolean {
-        return this._isForward;
-    }
-
-    get isBackward() {
         return !this.isForward;
     }
 
-    asApiString() {
+    asApiString(): string {
         return this.isForward ? "f" : "b";
     }
 
-    reverse() {
+    reverse(): Direction {
         return this.isForward ? Direction.Backward : Direction.Forward
     }
 
-    static get Forward() {
+    static get Forward(): Direction {
         return _forward;
     }
 
-    static get Backward() {
+    static get Backward(): Direction {
         return _backward;
     }
 }
 
-const _forward = Object.freeze(new Direction(true));
+const _forward = new Direction(true);
-const _backward = Object.freeze(new Direction(false));
+const _backward = new Direction(false);

src/matrix/room/timeline/Timeline.js

@@ -17,7 +17,7 @@ limitations under the License.
 
 import {SortedArray, AsyncMappedList, ConcatList, ObservableArray} from "../../../observable/index.js";
 import {Disposables} from "../../../utils/Disposables.js";
-import {Direction} from "./Direction.js";
+import {Direction} from "./Direction";
 import {TimelineReader} from "./persistence/TimelineReader.js";
 import {PendingEventEntry} from "./entries/PendingEventEntry.js";
 import {RoomMember} from "../members/RoomMember.js";

src/matrix/room/timeline/entries/FragmentBoundaryEntry.js

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import {BaseEntry} from "./BaseEntry";
-import {Direction} from "../Direction.js";
+import {Direction} from "../Direction";
 import {isValidFragmentId} from "../common.js";
 import {KeyLimits} from "../../../storage/common";
 

src/matrix/room/timeline/persistence/TimelineReader.js

@@ -15,7 +15,7 @@ limitations under the License.
 */
 
 import {directionalConcat, directionalAppend} from "./common.js";
-import {Direction} from "../Direction.js";
+import {Direction} from "../Direction";
 import {EventEntry} from "../entries/EventEntry.js";
 import {FragmentBoundaryEntry} from "../entries/FragmentBoundaryEntry.js";