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node_modules/matrix-js-sdk/lib/event-mapper.js

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+import _objectSpread from "@babel/runtime/helpers/objectSpread2";
+/*
+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 { MatrixEvent, MatrixEventEvent } from "./models/event.js";
+import { RelationType } from "./@types/event.js";
+export function eventMapperFor(client, options) {
+  let preventReEmit = Boolean(options.preventReEmit);
+  const decrypt = options.decrypt !== false;
+  function mapper(plainOldJsObject) {
+    const room = client.getRoom(plainOldJsObject.room_id);
+    let event;
+    // If the event is already known to the room, let's re-use the model rather than duplicating.
+    // We avoid doing this to state events as they may be forward or backwards looking which tweaks behaviour.
+    if (room && plainOldJsObject.state_key === undefined) {
+      event = room.findEventById(plainOldJsObject.event_id);
+    }
+    if (!event || event.status) {
+      event = new MatrixEvent(plainOldJsObject);
+    } else {
+      // merge the latest unsigned data from the server
+      event.setUnsigned(_objectSpread(_objectSpread({}, event.getUnsigned()), plainOldJsObject.unsigned));
+      // prevent doubling up re-emitters
+      preventReEmit = true;
+    }
+
+    // if there is a complete edit bundled alongside the event, perform the replacement.
+    // (prior to MSC3925, events were automatically replaced on the server-side. MSC3925 proposes that that doesn't
+    // happen automatically but the server does provide us with the whole content of the edit event.)
+    const bundledEdit = event.getServerAggregatedRelation(RelationType.Replace);
+    if (bundledEdit?.content) {
+      const replacement = mapper(bundledEdit);
+      // XXX: it's worth noting that the spec says we should only respect encrypted edits if, once decrypted, the
+      //   replacement has a `m.new_content` property. The problem is that we haven't yet decrypted the replacement
+      //   (it should be happening in the background), so we can't enforce this. Possibly we should for decryption
+      //   to complete, but that sounds a bit racy. For now, we just assume it's ok.
+      event.makeReplaced(replacement);
+    }
+    const thread = room?.findThreadForEvent(event);
+    if (thread) {
+      event.setThread(thread);
+    }
+    if (event.isEncrypted()) {
+      if (!preventReEmit) {
+        client.reEmitter.reEmit(event, [MatrixEventEvent.Decrypted]);
+      }
+      if (decrypt) {
+        client.decryptEventIfNeeded(event);
+      }
+    }
+    if (!preventReEmit) {
+      client.reEmitter.reEmit(event, [MatrixEventEvent.Replaced, MatrixEventEvent.VisibilityChange]);
+      room?.reEmitter.reEmit(event, [MatrixEventEvent.BeforeRedaction]);
+    }
+    return event;
+  }
+  return mapper;
+}
+//# sourceMappingURL=event-mapper.js.map