From 9ceeb2d220acb0acdccd98cb57bbb960f338c19e Mon Sep 17 00:00:00 2001
From: Germain Souquet <germains@element.io>
Date: Thu, 14 Oct 2021 17:09:00 +0100
Subject: [PATCH] Delete UnstableValue and use hardcoded value for m.thread

---
 src/@types/event.ts | 14 +++-----------
 src/models/event.ts |  3 +--
 2 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/src/@types/event.ts b/src/@types/event.ts
index 581b80d4425..b7ecb83390f 100644
--- a/src/@types/event.ts
+++ b/src/@types/event.ts
@@ -94,7 +94,9 @@ export enum RelationType {
     Replace = "m.replace",
     /**
      * Note, "io.element.thread" is hardcoded
-     * TypeScript does not allow computed values in enums
+     * Should be replaced with "m.thread" once MSC3440 lands
+     * Can not use `UnstableValue` as TypeScript does not
+     * allow computed values in enums
      * https://github.com/microsoft/TypeScript/issues/27976
      */
     Thread = "io.element.thread",
@@ -174,16 +176,6 @@ export const UNSTABLE_ELEMENT_FUNCTIONAL_USERS = new UnstableValue(
     "io.element.functional_members",
     "io.element.functional_members");
 
-/**
- * Note, "io.element.thread" is hardcoded in the RelationType enum
- * TypeScript does not allow computed values in enums
- * https://github.com/microsoft/TypeScript/issues/27976
- */
-export const UNSTABLE_ELEMENT_THREAD_RELATION = new UnstableValue(
-    "m.thread",
-    "io.element.thread",
-);
-
 export interface IEncryptedFile {
     url: string;
     mimetype?: string;
diff --git a/src/models/event.ts b/src/models/event.ts
index 70bc02d4b5c..b6e41982f5b 100644
--- a/src/models/event.ts
+++ b/src/models/event.ts
@@ -28,7 +28,6 @@ import {
     EventType,
     MsgType,
     RelationType,
-    UNSTABLE_ELEMENT_THREAD_RELATION,
 } from "../@types/event";
 import { Crypto } from "../crypto";
 import { deepSortedObjectEntries } from "../utils";
@@ -423,7 +422,7 @@ export class MatrixEvent extends EventEmitter {
      */
     public get threadRootId(): string {
         const relatesTo = this.getWireContent()?.["m.relates_to"];
-        if (relatesTo?.rel_type === UNSTABLE_ELEMENT_THREAD_RELATION.name) {
+        if (relatesTo?.rel_type === RelationType.Thread) {
             return relatesTo.event_id;
         }
     }