Accepting and declining invites

Hook up accept and decline buttons in the invites UI. Accept
will attempt to accept and then navigate to the room; decline
shows a confirmation dialog.

Fixes #106

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/FakeMatrixClient.kt

@@ -52,9 +52,10 @@ class FakeMatrixClient(
     private var createDmFailure: Throwable? = null
     private var findDmResult: MatrixRoom? = FakeMatrixRoom()
     private var logoutFailure: Throwable? = null
+    private val getRoomResults = mutableMapOf<RoomId, MatrixRoom>()
 
     override fun getRoom(roomId: RoomId): MatrixRoom? {
-        return FakeMatrixRoom(roomId)
+        return getRoomResults[roomId]
     }
 
     override fun findDM(userId: UserId): MatrixRoom? {
@@ -136,4 +137,8 @@ class FakeMatrixClient(
     fun givenFindDmResult(result: MatrixRoom?) {
         findDmResult = result
     }
+
+    fun givenGetRoomResult(roomId: RoomId, result: MatrixRoom) {
+        getRoomResults[roomId] = result
+    }
 }

libraries/matrix/test/src/main/kotlin/io/element/android/libraries/matrix/test/room/FakeMatrixRoom.kt

@@ -21,9 +21,9 @@ import io.element.android.libraries.matrix.api.core.RoomId
 import io.element.android.libraries.matrix.api.core.UserId
 import io.element.android.libraries.matrix.api.room.MatrixRoom
 import io.element.android.libraries.matrix.api.room.RoomMember
+import io.element.android.libraries.matrix.api.timeline.MatrixTimeline
 import io.element.android.libraries.matrix.test.A_ROOM_ID
 import io.element.android.libraries.matrix.test.timeline.FakeMatrixTimeline
-import io.element.android.libraries.matrix.api.timeline.MatrixTimeline
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.emptyFlow
@@ -46,12 +46,20 @@ class FakeMatrixRoom(
 
     private var userDisplayNameResult = Result.success<String?>(null)
     private var userAvatarUrlResult = Result.success<String?>(null)
+    private var acceptInviteResult = Result.success(Unit)
+    private var rejectInviteResult = Result.success(Unit)
     private var dmMember: RoomMember? = null
     private var fetchMemberResult: Result<Unit> = Result.success(Unit)
 
     var areMembersFetched: Boolean = false
         private set
 
+    var isInviteAccepted: Boolean = false
+        private set
+
+    var isInviteRejected: Boolean = false
+        private set
+
     private var leaveRoomError: Throwable? = null
 
     override fun syncUpdateFlow(): Flow<Long> {
@@ -131,6 +139,15 @@ class FakeMatrixRoom(
     }
 
     override suspend fun leave(): Result<Unit> = leaveRoomError?.let { Result.failure(it) } ?: Result.success(Unit)
+    override suspend fun acceptInvitation(): Result<Unit> {
+        isInviteAccepted = true
+        return acceptInviteResult
+    }
+
+    override suspend fun rejectInvitation(): Result<Unit> {
+        isInviteRejected = true
+        return rejectInviteResult
+    }
 
     override fun close() = Unit
 
@@ -153,4 +170,13 @@ class FakeMatrixRoom(
     fun givenUserAvatarUrlResult(avatarUrl: Result<String?>) {
         userAvatarUrlResult = avatarUrl
     }
+
+    fun givenAcceptInviteResult(result: Result<Unit>) {
+        acceptInviteResult = result
+    }
+
+    fun givenRejectInviteResult(result: Result<Unit>) {
+        rejectInviteResult = result
+    }
+
 }