typescriptifying ApplyMap

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/map/ApplyMap";
+import {addPanelIfNeeded} from "../../navigation";
 
 export class LeftPanelViewModel extends ViewModel {
     constructor(options) {

src/observable/index.ts

@@ -14,36 +14,11 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {SortedMapList} from "./list/SortedMapList.js";
-import {FilteredMap} from "./map/FilteredMap.js";
-import {MappedMap} from "./map/MappedMap.js";
-import {JoinedMap} from "./map/JoinedMap.js";
-import {BaseObservableMap} from "./map/BaseObservableMap";
+
 // re-export "root" (of chain) collection
 export { ObservableMap } from "./map/ObservableMap";
 export { ObservableArray } from "./list/ObservableArray";
 export { SortedArray } from "./list/SortedArray";
 export { MappedList } from "./list/MappedList";
 export { AsyncMappedList } from "./list/AsyncMappedList";
-export { ConcatList } from "./list/ConcatList";
-
-
-// avoid circular dependency between these classes
-// and BaseObservableMap (as they extend it)
-Object.assign(BaseObservableMap.prototype, {
-    sortValues(comparator) {
-        return new SortedMapList(this, comparator);
-    },
-
-    mapValues(mapper, updater) {
-        return new MappedMap(this, mapper, updater);
-    },
-
-    filterValues(filter) {
-        return new FilteredMap(this, filter);
-    },
-
-    join(...otherMaps) {
-        return new JoinedMap([this].concat(otherMaps));
-    }
-});
+export { ConcatList } from "./list/ConcatList";

src/observable/map/ApplyMap.ts

@@ -14,45 +14,73 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import {BaseObservableMap} from "./BaseObservableMap";
+import {BaseObservableMap, BaseObservableMapConfig} from "./BaseObservableMap";
+import {SubscriptionHandle} from "../BaseObservable";
+import {config} from "./config";
+import {JoinedMap} from "./JoinedMap.js";
+import {MappedMap} from "./MappedMap.js";
+import {FilteredMap} from "./FilteredMap.js";
+import {SortedMapList} from "../list/SortedMapList.js";
 
-export class ApplyMap extends BaseObservableMap {
-    constructor(source, apply) {
+
+export class ApplyMap<K, V> extends BaseObservableMap<K, V> {
+    private _source: BaseObservableMap<K, V>;
+    private _subscription?: SubscriptionHandle;
+    private _apply?: Apply<K, V>;
+    private _config: BaseObservableMapConfig<K, V>;
+
+    constructor(source: BaseObservableMap<K, V>, apply?: Apply<K, V>) {
         super();
         this._source = source;
         this._apply = apply;
-        this._subscription = null;
+        this._config = config<K, V>();
+    }
+
+    join(...otherMaps: Array<typeof this>): JoinedMap<K, V> {
+        return this._config.join(this, ...otherMaps);
+    }
+
+    mapValues(mapper: any, updater?: (params: any) => void): MappedMap<K, V> {
+        return this._config.mapValues(this, mapper, updater);
+    }
+
+    sortValues(comparator?: (a: any, b: any) => number): SortedMapList {
+        return this._config.sortValues(this, comparator);
+    }
+
+    filterValues(filter: (v: V, k: K) => boolean): FilteredMap<K, V> {
+        return this._config.filterValues(this, filter);
     }
 
     hasApply() {
         return !!this._apply;
     }
 
-    setApply(apply) {
+    setApply(apply?: Apply<K, V>) {
         this._apply = apply;
-        if (apply) {
+        if (this._apply) {
             this.applyOnce(this._apply);
         }
     }
 
-    applyOnce(apply) {
+    applyOnce(apply: Apply<K, V>) {
         for (const [key, value] of this._source) {
             apply(key, value);
         }
     }
 
-    onAdd(key, value) {
+    onAdd(key: K, value: V) {
         if (this._apply) {
             this._apply(key, value);
         }
         this.emitAdd(key, value);
     }
 
-    onRemove(key, value) {
+    onRemove(key: K, value: V) {
         this.emitRemove(key, value);
     }
 
-    onUpdate(key, value, params) {
+    onUpdate(key: K, value: V, params: any) {
         if (this._apply) {
             this._apply(key, value, params);
         }
@@ -69,7 +97,7 @@ export class ApplyMap extends BaseObservableMap {
 
     onUnsubscribeLast() {
         super.onUnsubscribeLast();
-        this._subscription = this._subscription();
+        if (this._subscription) this._subscription = this._subscription();
     }
 
     onReset() {
@@ -87,7 +115,9 @@ export class ApplyMap extends BaseObservableMap {
         return this._source.size;
     }
 
-    get(key) {
+    get(key: K) {
         return this._source.get(key);
     }
 }
+
+type Apply<K, V> = (key: K, value: V, params?: any) => void;

src/observable/map/FilteredMap.ts

@@ -23,7 +23,7 @@ import {SortedMapList} from "../list/SortedMapList.js";
 
 export class FilteredMap<K, V> extends BaseObservableMap<K, V> {
     private _source: BaseObservableMap<K, V>;
-    private _config: BaseObservableMapConfig<K, V>
+    private _config: BaseObservableMapConfig<K, V>;
     private _filter: (value: V, key: K) => boolean;
     private _included?: Map<K, boolean>;
     private _subscription?: SubscriptionHandle;