diff options
Diffstat (limited to 'comm/chat/protocols/matrix/lib/matrix-sdk/event-mapper.js')
| -rw-r--r-- | comm/chat/protocols/matrix/lib/matrix-sdk/event-mapper.js | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/comm/chat/protocols/matrix/lib/matrix-sdk/event-mapper.js b/comm/chat/protocols/matrix/lib/matrix-sdk/event-mapper.js new file mode 100644 index 0000000000..a8b30881ab --- /dev/null +++ b/comm/chat/protocols/matrix/lib/matrix-sdk/event-mapper.js @@ -0,0 +1,86 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.eventMapperFor = eventMapperFor; +var _event = require("./models/event"); +var _event2 = require("./@types/event"); +function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; } +function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; } +function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; } +function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); } +function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); } /* + 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. + */ +function eventMapperFor(client, options) { + let preventReEmit = Boolean(options.preventReEmit); + const decrypt = options.decrypt !== false; + function mapper(plainOldJsObject) { + if (options.toDevice) { + delete plainOldJsObject.room_id; + } + 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 _event.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(_event2.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); + } + + // TODO: once we get rid of the old libolm-backed crypto, we can restrict this to room events (rather than + // to-device events), because the rust implementation decrypts to-device messages at a higher level. + // Generally we probably want to use a different eventMapper implementation for to-device events because + if (event.isEncrypted()) { + if (!preventReEmit) { + client.reEmitter.reEmit(event, [_event.MatrixEventEvent.Decrypted]); + } + if (decrypt) { + client.decryptEventIfNeeded(event); + } + } + if (!preventReEmit) { + client.reEmitter.reEmit(event, [_event.MatrixEventEvent.Replaced, _event.MatrixEventEvent.VisibilityChange]); + room?.reEmitter.reEmit(event, [_event.MatrixEventEvent.BeforeRedaction]); + } + return event; + } + return mapper; +}
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