From 4f7468a95af24b82b15244dfec2c2bc4ab23fb72 Mon Sep 17 00:00:00 2001
From: Kegan Dougal <kegan@matrix.org>
Date: Tue, 30 Nov 2021 15:35:29 +0000
Subject: [PATCH] compare(): Add checks for 'ph-123' room IDs

These will be used to place placeholders correctly.
---
 src/matrix/Sync3.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/matrix/Sync3.ts b/src/matrix/Sync3.ts
index d6ae3407..5c88d973 100644
--- a/src/matrix/Sync3.ts
+++ b/src/matrix/Sync3.ts
@@ -159,8 +159,14 @@ export class Sync3 {
         if (roomIdA === roomIdB) {
             return 0;
         }
-        const indexA = this.roomIdToRoomIndex[roomIdA];
-        const indexB = this.roomIdToRoomIndex[roomIdB];
+        let indexA = this.roomIdToRoomIndex[roomIdA];
+        let indexB = this.roomIdToRoomIndex[roomIdB];
+        if (indexA === undefined && roomIdA.startsWith("ph-")) {
+            indexA = Number(roomIdA.substr(3));
+        }
+        if (indexB === undefined && roomIdB.startsWith("ph-")) {
+            indexB = Number(roomIdB.substr(3));
+        }
         if (indexA === undefined || indexB === undefined) {
             console.error("sync3 cannot compare: missing indices for rooms", roomIdA, roomIdB, indexA, indexB);
         }