Jitsi: handle switch to another conference, now possible since we support PiP

vector/src/main/java/im/vector/app/features/call/conference/JitsiCallViewActions.kt

@@ -18,4 +18,12 @@ package im.vector.app.features.call.conference
 
 import im.vector.app.core.platform.VectorViewModelAction
 
-sealed class JitsiCallViewActions : VectorViewModelAction
+sealed class JitsiCallViewActions : VectorViewModelAction {
+    data class SwitchTo(val args: VectorJitsiActivity.Args,
+                        val withConfirmation: Boolean) : JitsiCallViewActions()
+
+    /**
+     * The ViewModel will either ask the View to finish, or to join another conf.
+     */
+    object OnConferenceLeft: JitsiCallViewActions()
+}

vector/src/main/java/im/vector/app/features/call/conference/JitsiCallViewEvents.kt

@@ -27,4 +27,11 @@ sealed class JitsiCallViewEvents : VectorViewEvents {
             val confId: String,
             val userInfo: JitsiMeetUserInfo
     ) : JitsiCallViewEvents()
+
+    data class ConfirmSwitchingConference(
+            val args: VectorJitsiActivity.Args
+    ) : JitsiCallViewEvents()
+
+    object LeaveConference : JitsiCallViewEvents()
+    object Finish : JitsiCallViewEvents()
 }

vector/src/main/java/im/vector/app/features/call/conference/JitsiCallViewModel.kt

@@ -19,12 +19,15 @@ package im.vector.app.features.call.conference
 import com.airbnb.mvrx.Fail
 import com.airbnb.mvrx.MvRxViewModelFactory
 import com.airbnb.mvrx.Success
+import com.airbnb.mvrx.Uninitialized
 import com.airbnb.mvrx.ViewModelContext
 import dagger.assisted.Assisted
-import dagger.assisted.AssistedInject
 import dagger.assisted.AssistedFactory
+import dagger.assisted.AssistedInject
+import im.vector.app.core.extensions.exhaustive
 import im.vector.app.core.platform.VectorViewModel
 import im.vector.app.features.themes.ThemeProvider
+import io.reactivex.disposables.Disposable
 import org.jitsi.meet.sdk.JitsiMeetUserInfo
 import org.matrix.android.sdk.api.query.QueryStringValue
 import org.matrix.android.sdk.api.session.Session
@@ -36,7 +39,6 @@ import java.net.URL
 
 class JitsiCallViewModel @AssistedInject constructor(
         @Assisted initialState: JitsiCallViewState,
-        @Assisted private val args: VectorJitsiActivity.Args,
         private val session: Session,
         private val jitsiMeetPropertiesFactory: JitsiWidgetPropertiesFactory,
         private val themeProvider: ThemeProvider
@@ -44,15 +46,23 @@ class JitsiCallViewModel @AssistedInject constructor(
 
     @AssistedFactory
     interface Factory {
-        fun create(initialState: JitsiCallViewState, args: VectorJitsiActivity.Args): JitsiCallViewModel
+        fun create(initialState: JitsiCallViewState): JitsiCallViewModel
     }
 
+    private var currentWidgetObserver: Disposable? = null
     private val widgetService = session.widgetService()
 
     private var confIsStarted = false
+    private var pendingArgs: VectorJitsiActivity.Args? = null
 
     init {
-        widgetService.getRoomWidgetsLive(args.roomId, QueryStringValue.Equals(args.widgetId), WidgetType.Jitsi.values())
+        observeWidget(initialState.roomId, initialState.widgetId)
+    }
+
+    private fun observeWidget(roomId: String, widgetId: String) {
+        confIsStarted = false
+        currentWidgetObserver?.dispose()
+        currentWidgetObserver = widgetService.getRoomWidgetsLive(roomId, QueryStringValue.Equals(widgetId), WidgetType.Jitsi.values())
                 .asObservable()
                 .distinctUntilChanged()
                 .subscribe {
@@ -77,19 +87,19 @@ class JitsiCallViewModel @AssistedInject constructor(
                 .disposeOnClear()
     }
 
-    private fun startConference(jitsiWidget: Widget) {
-        val me = session.getRoomMember(session.myUserId, args.roomId)?.toMatrixItem()
+    private fun startConference(jitsiWidget: Widget) = withState { state ->
+        val me = session.getRoomMember(session.myUserId, state.roomId)?.toMatrixItem()
         val userInfo = JitsiMeetUserInfo().apply {
             displayName = me?.getBestName()
             avatar = me?.avatarUrl?.let { session.contentUrlResolver().resolveFullSize(it) }?.let { URL(it) }
         }
-        val roomName = session.getRoomSummary(args.roomId)?.displayName
+        val roomName = session.getRoomSummary(state.roomId)?.displayName
 
         val ppt = widgetService.getWidgetComputedUrl(jitsiWidget, themeProvider.isLightTheme())
                 ?.let { url -> jitsiMeetPropertiesFactory.create(url) }
 
         _viewEvents.post(JitsiCallViewEvents.StartConference(
-                enableVideo = args.enableVideo,
+                enableVideo = state.enableVideo,
                 jitsiUrl = "https://${ppt?.domain}",
                 subject = roomName ?: "",
                 confId = ppt?.confId ?: "",
@@ -98,6 +108,45 @@ class JitsiCallViewModel @AssistedInject constructor(
     }
 
     override fun handle(action: JitsiCallViewActions) {
+        when (action) {
+            is JitsiCallViewActions.SwitchTo      -> handleSwitchTo(action)
+            JitsiCallViewActions.OnConferenceLeft -> handleOnConferenceLeft()
+        }.exhaustive
+    }
+
+    private fun handleSwitchTo(action: JitsiCallViewActions.SwitchTo) = withState { state ->
+        // Check if it is the same conf
+        if (action.args.roomId != state.roomId
+                || action.args.widgetId != state.widgetId) {
+            if (action.withConfirmation) {
+                // Ask confirmation to switch
+                _viewEvents.post(JitsiCallViewEvents.ConfirmSwitchingConference(action.args))
+            } else {
+                // Ask the view to leave the conf, then the view will tell us when it's done, to join the new conf
+                pendingArgs = action.args
+                _viewEvents.post(JitsiCallViewEvents.LeaveConference)
+            }
+        }
+    }
+
+    private fun handleOnConferenceLeft() {
+        val safePendingArgs = pendingArgs
+        pendingArgs = null
+
+        if (safePendingArgs == null) {
+            // Quit
+            _viewEvents.post(JitsiCallViewEvents.Finish)
+        } else {
+            setState {
+                copy(
+                        roomId = safePendingArgs.roomId,
+                        widgetId = safePendingArgs.widgetId,
+                        enableVideo = safePendingArgs.enableVideo,
+                        widget = Uninitialized
+                )
+            }
+            observeWidget(safePendingArgs.roomId, safePendingArgs.widgetId)
+        }
     }
 
     companion object : MvRxViewModelFactory<JitsiCallViewModel, JitsiCallViewState> {
@@ -107,8 +156,7 @@ class JitsiCallViewModel @AssistedInject constructor(
         @JvmStatic
         override fun create(viewModelContext: ViewModelContext, state: JitsiCallViewState): JitsiCallViewModel? {
             val callActivity: VectorJitsiActivity = viewModelContext.activity()
-            val callArgs: VectorJitsiActivity.Args = viewModelContext.args()
-            return callActivity.viewModelFactory.create(state, callArgs)
+            return callActivity.viewModelFactory.create(state)
         }
 
         override fun initialState(viewModelContext: ViewModelContext): JitsiCallViewState? {
@@ -116,7 +164,8 @@ class JitsiCallViewModel @AssistedInject constructor(
 
             return JitsiCallViewState(
                     roomId = args.roomId,
-                    widgetId = args.widgetId
+                    widgetId = args.widgetId,
+                    enableVideo = args.enableVideo
             )
         }
     }

vector/src/main/java/im/vector/app/features/call/conference/JitsiCallViewState.kt

@@ -24,5 +24,6 @@ import org.matrix.android.sdk.api.session.widgets.model.Widget
 data class JitsiCallViewState(
         val roomId: String = "",
         val widgetId: String = "",
+        val enableVideo: Boolean = false,
         val widget: Async<Widget> = Uninitialized
 ) : MvRxState

vector/src/main/java/im/vector/app/features/call/conference/VectorJitsiActivity.kt

@@ -25,6 +25,7 @@ import android.content.res.Configuration
 import android.os.Bundle
 import android.os.Parcelable
 import android.widget.FrameLayout
+import androidx.appcompat.app.AlertDialog
 import androidx.core.view.isVisible
 import androidx.localbroadcastmanager.content.LocalBroadcastManager
 import com.airbnb.mvrx.Fail
@@ -32,6 +33,7 @@ import com.airbnb.mvrx.MvRx
 import com.airbnb.mvrx.Success
 import com.airbnb.mvrx.viewModel
 import com.facebook.react.modules.core.PermissionListener
+import im.vector.app.R
 import im.vector.app.core.di.ScreenComponent
 import im.vector.app.core.extensions.exhaustive
 import im.vector.app.core.platform.VectorBaseActivity
@@ -85,13 +87,31 @@ class VectorJitsiActivity : VectorBaseActivity<ActivityJitsiBinding>(), JitsiMee
 
         jitsiViewModel.observeViewEvents {
             when (it) {
-                is JitsiCallViewEvents.StartConference -> configureJitsiView(it)
+                is JitsiCallViewEvents.StartConference            -> configureJitsiView(it)
+                is JitsiCallViewEvents.ConfirmSwitchingConference -> handleConfirmSwitching(it)
+                JitsiCallViewEvents.Finish                        -> finish()
+                JitsiCallViewEvents.LeaveConference               -> handleLeaveConference()
             }.exhaustive
         }
 
         registerForBroadcastMessages()
     }
 
+    private fun handleLeaveConference() {
+        jitsiMeetView?.leave()
+    }
+
+    private fun handleConfirmSwitching(action: JitsiCallViewEvents.ConfirmSwitchingConference) {
+        AlertDialog.Builder(this)
+                .setTitle(R.string.dialog_title_warning)
+                .setMessage(R.string.jitsi_leave_conf_to_join_another_one_content)
+                .setPositiveButton(R.string.action_switch) { _, _ ->
+                    jitsiViewModel.handle(JitsiCallViewActions.SwitchTo(action.args, false))
+                }
+                .setNegativeButton(R.string.cancel, null)
+                .show()
+    }
+
     override fun onPictureInPictureModeChanged(isInPictureInPictureMode: Boolean,
                                                newConfig: Configuration) {
         super.onPictureInPictureModeChanged(isInPictureInPictureMode, newConfig)
@@ -170,6 +190,14 @@ class VectorJitsiActivity : VectorBaseActivity<ActivityJitsiBinding>(), JitsiMee
 
     override fun onNewIntent(intent: Intent?) {
         JitsiMeetActivityDelegate.onNewIntent(intent)
+
+        // Is it a switch to another conf?
+        intent?.takeIf { it.hasExtra(MvRx.KEY_ARG) }
+                ?.let { intent.getParcelableExtra<Args>(MvRx.KEY_ARG) }
+                ?.let {
+                    jitsiViewModel.handle(JitsiCallViewActions.SwitchTo(it, true))
+                }
+
         super.onNewIntent(intent)
     }
 
@@ -211,7 +239,7 @@ class VectorJitsiActivity : VectorBaseActivity<ActivityJitsiBinding>(), JitsiMee
         Timber.v("JitsiMeetViewListener.onConferenceTerminated()")
         // Do not finish if there is an error
         if (data["error"] == null) {
-            finish()
+            jitsiViewModel.handle(JitsiCallViewActions.OnConferenceLeft)
         }
     }
 

vector/src/main/res/values/strings.xml

@@ -133,6 +133,7 @@
     <string name="action_close">Close</string>
     <string name="action_copy">Copy</string>
     <string name="action_add">Add</string>
+    <string name="action_switch">Switch</string>
     <string name="action_unpublish">Unpublish</string>
     <string name="copied_to_clipboard">Copied to clipboard</string>
     <string name="disable">Disable</string>
@@ -1318,6 +1319,8 @@
 
 
     <string name="error_jitsi_not_supported_on_old_device">Sorry, conference calls with Jitsi are not supported on old devices (devices with Android OS below 6.0)</string>
+    <string name="jitsi_leave_conf_to_join_another_one_content">Leave the current conference and switch to the other one?</string>
+
     <string name="room_widget_resource_permission_title">This widget wants to use the following resources:</string>
     <string name="room_widget_resource_grant_permission">Allow</string>
     <string name="room_widget_resource_decline_permission">Block All</string>