[Combined] First pass of JS->TS for MatrixClient

src/event-mapper.ts

@@ -0,0 +1,48 @@
+/*
+Copyright 2021 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+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 { MatrixClient } from "./1client";
+import {MatrixEvent} from "./models/event";
+
+export type EventMapper = (obj: any) => MatrixEvent;
+
+export interface MapperOpts {
+    preventReEmit?: boolean;
+    decrypt?: boolean;
+}
+
+export function eventMapperFor(client: MatrixClient, options: MapperOpts): EventMapper {
+    const preventReEmit = Boolean(options.preventReEmit);
+    const decrypt = options.decrypt !== false;
+    function mapper(plainOldJsObject) {
+        const event = new MatrixEvent(plainOldJsObject);
+        if (event.isEncrypted()) {
+            if (!preventReEmit) {
+                client.reEmitter.reEmit(event, [
+                    "Event.decrypted",
+                ]);
+            }
+            if (decrypt) {
+                client.decryptEventIfNeeded(event);
+            }
+        }
+        if (!preventReEmit) {
+            client.reEmitter.reEmit(event, ["Event.replaced"]);
+        }
+        return event;
+    }
+    return mapper;
+}