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Add getRelation helper

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This adds a `getRelation` helper to ensure we always read relation info from the
wire content as required in E2E rooms.
This commit is contained in:
J. Ryan Stinnett
2019-05-15 13:42:06 +01:00
parent ce0b014a5a
commit f17ecba519
4 changed files with 26 additions and 19 deletions
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30
src/models/event.js
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@@ -735,20 +735,34 @@ utils.extend(module.exports.MatrixEvent.prototype, {
},
/**
* Get whether the event is a relation event, and of a given type if `relType` is passed in.
* Get whether the event is a relation event, and of a given type if
* `relType` is passed in.
*
* @param {string?} relType if given, checks that the relation is of the given type
* @param {string?} relType if given, checks that the relation is of the
* given type
* @return {boolean}
*/
isRelation(relType = undefined) {
// must use event.content as m.relates_to is not encrypted
// and _clearEvent doesn't have it.
const content = this.event.content;
// Relation info is lifted out of the encrypted content when sent to
// encrypted rooms, so we have to check `getWireContent` for this.
const content = this.getWireContent();
const relation = content && content["m.relates_to"];
return relation && relation.rel_type && relation.event_id &&
((relType && relation.rel_type === relType) || !relType);
},
/**
* Get relation info for the event, if any.
*
* @return {Object}
*/
getRelation() {
if (!this.isRelation()) {
return null;
}
return this.getWireContent()["m.relates_to"];
},
/**
* Set an event that replaces the content of this event, through an m.replace relation.
*
@@ -768,11 +782,7 @@ utils.extend(module.exports.MatrixEvent.prototype, {
}
const oldContent = this.getContent();
const newContent = newEvent.getContent()["m.new_content"];
// need to always replace m.relates_to with the old one,
// even if there is none, as the m.replace relation should
// not be exposed on the target event m.relates_to (that's what the server does).
Object.assign(oldContent, newContent,
{"m.relates_to": oldContent["m.relates_to"]});
Object.assign(oldContent, newContent);
this._replacingEvent = newEvent;
},