From 7e9bf3911e0457bf5af21672d4325882584b78ad Mon Sep 17 00:00:00 2001
From: Kitsune Ral <Kitsune-Ral@users.sf.net>
Date: Sat, 16 Feb 2019 20:00:46 +0900
Subject: Room::canSwitchVersions()

---
 lib/room.cpp | 40 +++++++++++++++++++++++-----------------
 lib/room.h   |  3 +++
 2 files changed, 26 insertions(+), 17 deletions(-)

(limited to 'lib')

diff --git a/lib/room.cpp b/lib/room.cpp
index 3a37053d..538c1562 100644
--- a/lib/room.cpp
+++ b/lib/room.cpp
@@ -573,6 +573,26 @@ void Room::markAllMessagesAsRead()
         d->markMessagesAsRead(d->timeline.crbegin());
 }
 
+bool Room::canSwitchVersions() const
+{
+    // TODO, #276: m.room.power_levels
+    const auto* plEvt =
+            d->currentState.value({"m.room.power_levels", ""});
+    if (!plEvt)
+        return true;
+
+    const auto plJson = plEvt->contentJson();
+    const auto currentUserLevel =
+        plJson.value("users"_ls).toObject()
+        .value(localUser()->id()).toInt(
+            plJson.value("users_default"_ls).toInt());
+    const auto tombstonePowerLevel =
+        plJson.value("events").toObject()
+        .value("m.room.tombstone"_ls).toInt(
+            plJson.value("state_default"_ls).toInt());
+    return currentUserLevel >= tombstonePowerLevel;
+}
+
 bool Room::hasUnreadMessages() const
 {
     return unreadCount() >= 0;
@@ -1622,24 +1642,10 @@ void Room::checkVersion()
     {
         qCDebug(MAIN) << this << "version is" << version()
                       << "which the server doesn't count as stable";
-        // TODO, #276: m.room.power_levels
-        if (const auto* plEvt =
-                d->currentState.value({"m.room.power_levels", ""}))
+        if (canSwitchVersions())
         {
-            const auto plJson = plEvt->contentJson();
-            const auto currentUserLevel =
-                plJson.value("users"_ls).toObject()
-                .value(localUser()->id()).toInt(
-                    plJson.value("users_default"_ls).toInt());
-            const auto tombstonePowerLevel =
-                plJson.value("events").toObject()
-                .value("m.room.tombstone"_ls).toInt(
-                    plJson.value("state_default"_ls).toInt());
-            if (currentUserLevel >= tombstonePowerLevel)
-            {
-                qCDebug(MAIN) << "The current user has enough privileges to fix it";
-                emit unstableVersion(defaultVersion, stableVersions);
-            }
+            qCDebug(MAIN) << "The current user has enough privileges to fix it";
+            emit unstableVersion(defaultVersion, stableVersions);
         }
     }
 }
diff --git a/lib/room.h b/lib/room.h
index e09da94c..f12627f3 100644
--- a/lib/room.h
+++ b/lib/room.h
@@ -424,6 +424,9 @@ namespace QMatrixClient
             /// Mark all messages in the room as read
             void markAllMessagesAsRead();
 
+            /// Whether the current user is allowed to upgrade the room
+            bool canSwitchVersions() const;
+
             /// Switch the room's version (aka upgrade)
             void switchVersion(QString newVersion);
 
-- 
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