Add support for joining rooms from a space. (#4501)

* Add support for joining rooms from a space.

Doesn't yet handle the Join button 🤔

* Handle the join button for both rooms and spaces.

Also refactor more instances of spaceRoom to spaceRoomProxy.

ElementX/Sources/Services/Client/ClientProxy.swift

@@ -542,6 +542,17 @@ class ClientProxy: ClientProxyProtocol {
         }
     }
     
+    func canJoinRoom(with rules: [AllowRule]) -> Bool {
+        for rule in rules {
+            if case let .roomMembership(roomID) = rule,
+               let room = try? client.getRoom(roomId: roomID),
+               room.membership() == .joined {
+                return true
+            }
+        }
+        return false
+    }
+    
     func uploadMedia(_ media: MediaInfo) async -> Result<String, ClientProxyError> {
         guard let mimeType = media.mimeType else {
             MXLog.error("Failed uploading media, invalid mime type: \(media)")

ElementX/Sources/Services/Client/ClientProxyProtocol.swift

@@ -165,6 +165,8 @@ protocol ClientProxyProtocol: AnyObject {
     
     func knockRoomAlias(_ roomAlias: String, message: String?) async -> Result<Void, ClientProxyError>
     
+    func canJoinRoom(with rules: [AllowRule]) -> Bool
+    
     func uploadMedia(_ media: MediaInfo) async -> Result<String, ClientProxyError>
     
     func roomForIdentifier(_ identifier: String) async -> RoomProxyType?