SQ-166/Empty state(s) for favourites

app/src/main/java/net/squanchy/eventdetails/widget/EventDetailsLayout.java

@@ -117,6 +117,7 @@ private int getColorFromTheme(Resources.Theme theme, @AttrRes int attributeId) {
     private void updateDescription(Optional<String> description) {
         if (description.isPresent()) {
             descriptionHeader.setVisibility(VISIBLE);
+            descriptionTextView.setVisibility(VISIBLE);
             descriptionTextView.setText(parseHtml(description.get()));
         } else {
             descriptionHeader.setVisibility(GONE);

app/src/main/java/net/squanchy/favorites/FavoritesPageView.java

@@ -18,8 +18,10 @@
 import net.squanchy.schedule.domain.view.Schedule;
 import net.squanchy.schedule.view.ScheduleViewPagerAdapter;
 
+import io.reactivex.Observable;
 import io.reactivex.android.schedulers.AndroidSchedulers;
 import io.reactivex.disposables.Disposable;
+import io.reactivex.functions.BiFunction;
 
 import static net.squanchy.support.ContextUnwrapper.unwrapToActivityContext;
 
@@ -31,6 +33,8 @@ public class FavoritesPageView extends CoordinatorLayout implements LifecycleVie
     private Navigator navigate;
     private Analytics analytics;
     private FavoritesListView favoritesListView;
+    private View emptyViewSignedIn;
+    private View emptyViewSignedOut;
 
     public FavoritesPageView(Context context, AttributeSet attrs) {
         this(context, attrs, 0);
@@ -44,17 +48,21 @@ public FavoritesPageView(Context context, AttributeSet attrs, int defStyleAttr)
     protected void onFinishInflate() {
         super.onFinishInflate();
 
-        Activity activity = unwrapToActivityContext(getContext());
-        FavoritesComponent component = FavoritesInjector.obtain(activity);
-        service = component.service();
-        navigate = component.navigator();
-        analytics = component.analytics();
-
         progressBar = findViewById(R.id.progressbar);
-
         favoritesListView = (FavoritesListView) findViewById(R.id.favorites_list);
+        emptyViewSignedIn = findViewById(R.id.empty_view_signed_in);
+        emptyViewSignedOut = findViewById(R.id.empty_view_signed_out);
+        emptyViewSignedOut.setOnClickListener(view -> navigate.toSignIn());
 
         setupToolbar();
+
+        if (!isInEditMode()) {
+            Activity activity = unwrapToActivityContext(getContext());
+            FavoritesComponent component = FavoritesInjector.obtain(activity);
+            service = component.service();
+            navigate = component.navigator();
+            analytics = component.analytics();
+        }
     }
 
     private void setupToolbar() {
@@ -77,11 +85,15 @@ private void setupToolbar() {
 
     @Override
     public void onStart() {
-        subscription = service.schedule(true)
+        subscription = Observable.combineLatest(service.schedule(true), service.currentUserIsSignedIn(), toScheduleAndLoggedIn())
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(schedule -> updateWith(schedule, this::onEventClicked));
     }
 
+    private BiFunction<Schedule, Boolean, ScheduledAndSignedIn> toScheduleAndLoggedIn() {
+        return ScheduledAndSignedIn::new;
+    }
+
     private void onEventClicked(Event event) {
         analytics.trackItemSelected(ContentType.FAVORITES_ITEM, event.id());
         navigate.toEventDetails(event.id());
@@ -92,8 +104,57 @@ public void onStop() {
         subscription.dispose();
     }
 
-    public void updateWith(Schedule schedule, ScheduleViewPagerAdapter.OnEventClickedListener listener) {
-        favoritesListView.updateWith(schedule, listener);
+    private void updateWith(ScheduledAndSignedIn scheduledAndSignedIn, ScheduleViewPagerAdapter.OnEventClickedListener listener) {
+        if (scheduledAndSignedIn.hasFavorites()) {
+            updateWith(scheduledAndSignedIn.schedule, listener);
+        } else {
+            if (scheduledAndSignedIn.signedIn) {
+                promptToFavorite();
+            } else {
+                promptToSign();
+            }
+        }
+    }
+
+    private void updateWith(Schedule schedule, ScheduleViewPagerAdapter.OnEventClickedListener listener) {
+        if (schedule.isEmpty()) {
+            promptToFavorite();
+        } else {
+            favoritesListView.updateWith(schedule, listener);
+            favoritesListView.setVisibility(VISIBLE);
+            emptyViewSignedIn.setVisibility(GONE);
+        }
+
+        progressBar.setVisibility(GONE);
+        emptyViewSignedOut.setVisibility(GONE);
+    }
+
+    private void promptToFavorite() {
+        favoritesListView.setVisibility(GONE);
+        progressBar.setVisibility(GONE);
+        emptyViewSignedOut.setVisibility(GONE);
+        emptyViewSignedIn.setVisibility(VISIBLE);
+    }
+
+    public void promptToSign() {
+        favoritesListView.setVisibility(GONE);
         progressBar.setVisibility(GONE);
+        emptyViewSignedOut.setVisibility(VISIBLE);
+        emptyViewSignedIn.setVisibility(GONE);
+    }
+
+    private static class ScheduledAndSignedIn {
+
+        final Schedule schedule;
+        final boolean signedIn;
+
+        private ScheduledAndSignedIn(Schedule schedule, boolean signedIn) {
+            this.schedule = schedule;
+            this.signedIn = signedIn;
+        }
+
+        boolean hasFavorites() {
+            return !schedule.isEmpty();
+        }
     }
 }

app/src/main/java/net/squanchy/favorites/view/NoFavoritesView.java

@@ -0,0 +1,60 @@
+package net.squanchy.favorites.view;
+
+import android.content.Context;
+import android.support.annotation.Nullable;
+import android.support.design.widget.FloatingActionButton;
+import android.support.design.widget.Snackbar;
+import android.util.AttributeSet;
+import android.view.View;
+import android.widget.LinearLayout;
+
+import net.squanchy.R;
+
+public class NoFavoritesView extends LinearLayout {
+
+    private static final int MAGIC_NUMBER_TO_TRIGGER_ACHIEVEMENT = 5;
+    private FloatingActionButton favoriteButton;
+
+    public NoFavoritesView(Context context) {
+        super(context);
+    }
+
+    public NoFavoritesView(Context context, @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public NoFavoritesView(Context context, @Nullable AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        super.onFinishInflate();
+        super.setOrientation(VERTICAL);
+        inflate(getContext(), R.layout.merge_no_favorites_view, this);
+
+        favoriteButton = (FloatingActionButton) findViewById(R.id.favorite_fab_example);
+        favoriteButton.setOnClickListener(new OnClickListener() {
+            int counter = 0;
+
+            @Override
+            public void onClick(View view) {
+                favoriteButton.setImageResource(
+                        counter % 2 == 0 ?
+                                R.drawable.ic_favorite_filled :
+                                R.drawable.ic_favorite_empty
+                );
+
+                counter++;
+                if (counter == MAGIC_NUMBER_TO_TRIGGER_ACHIEVEMENT) {
+                    Snackbar.make(NoFavoritesView.this, R.string.achievement_unlocked, Snackbar.LENGTH_LONG).show();
+                }
+            }
+        });
+    }
+
+    @Override
+    public void setOrientation(int orientation) {
+        throw new UnsupportedOperationException("Changing orientation is not supported for " + NoFavoritesView.class.getSimpleName());
+    }
+}

app/src/main/java/net/squanchy/schedule/ScheduleService.java

@@ -56,6 +56,11 @@ public Observable<Schedule> schedule(boolean onlyFavorites) {
         });
     }
 
+    public Observable<Boolean> currentUserIsSignedIn() {
+        return authService.currentUser()
+                .map(optionalUser -> optionalUser.map(user -> !user.isAnonymous()).or(false));
+    }
+
     private Function<List<Event>, HashMap<String, List<Event>>> groupEventsByDay() {
         return events -> Lists.reduce(new HashMap<>(), events, listToDaysHashMap());
     }

app/src/main/java/net/squanchy/schedule/domain/view/Schedule.java

@@ -6,9 +6,14 @@
 
 @AutoValue
 public abstract class Schedule {
+
     public static Schedule create(List<SchedulePage> pages) {
         return new AutoValue_Schedule(pages);
     }
 
     public abstract List<SchedulePage> pages();
+
+    public boolean isEmpty() {
+        return pages().isEmpty();
+    }
 }

app/src/main/res/layout/merge_no_favorites_view.xml

@@ -0,0 +1,27 @@
+<merge xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:tools="http://schemas.android.com/tools"
+  android:layout_width="wrap_content"
+  android:layout_height="wrap_content"
+  android:layout_gravity="center"
+  android:orientation="vertical"
+  tools:parentTag="LinearLayout">
+
+  <android.support.design.widget.FloatingActionButton
+    android:id="@+id/favorite_fab_example"
+    style="@style/EventDetails.Fab"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center_horizontal" />
+
+  <TextView
+    android:id="@+id/text"
+    style="@style/Favorite.Empty.Text"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center_horizontal"
+    android:layout_marginTop="20dp"
+    android:layout_marginLeft="@dimen/card_horizontal_margin"
+    android:layout_marginRight="@dimen/card_horizontal_margin"
+    android:foreground="@drawable/primary_touch_feedback"
+    android:text="@string/prompt_to_favorite" />
+</merge>

app/src/main/res/layout/view_page_favorites.xml

@@ -5,8 +5,7 @@
   android:id="@+id/favorites_content_root"
   android:theme="@style/Theme.Squanchy.Favorites"
   android:layout_width="match_parent"
-  android:layout_height="match_parent"
-  tools:context="net.squanchy.schedule.ScheduleActivity">
+  android:layout_height="match_parent">
 
   <android.support.design.widget.AppBarLayout
     style="@style/Squanchy.Appbar"
@@ -27,6 +26,32 @@
     android:layout_height="match_parent"
     app:layout_behavior="@string/appbar_scrolling_view_behavior" />
 
+  <LinearLayout
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content"
+    android:layout_gravity="center"
+    android:layout_marginLeft="@dimen/card_horizontal_margin"
+    android:layout_marginRight="@dimen/card_horizontal_margin"
+    android:gravity="center_horizontal"
+    android:orientation="vertical">
+
+    <net.squanchy.favorites.view.NoFavoritesView
+      android:id="@+id/empty_view_signed_in"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:visibility="gone" />
+
+    <TextView
+      android:id="@+id/empty_view_signed_out"
+      style="@style/Favorite.Empty.Text"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"
+      android:drawableTop="@drawable/illustration_prompt_to_sign_in"
+      android:visibility="gone"
+      android:text="@string/prompt_to_sign_in_for_favorites"
+      tools:visibility="visible" />
+  </LinearLayout>
+
   <ProgressBar
     android:id="@+id/progressbar"
     android:layout_width="wrap_content"

app/src/main/res/values/refs.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <drawable name="illustration_prompt_to_sign_in">@drawable/illustration_lunch</drawable>
+</resources>

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

@@ -14,9 +14,8 @@
 
   <string name="event_notification_starting_by">By %s</string>
   <string name="event_notification_starting_in">In %s</string>
-  <string name="event_notification_count_starting">%d sessions are starting</string>
-  <string name="room_event_notification"
-    translatable="false">%s: %s</string>
+  <string name="event_notification_count_starting">%s sessions are starting</string>
+  <string name="room_event_notification" translatable="false">%s: %s</string>
   <plurals name="event_notification_ticker">
     <item quantity="one">1 session is about to start.</item>
     <item quantity="other">%d sessions are about to start.</item>
@@ -70,6 +69,9 @@
   <string name="venue_map_content_description">Map to the venue</string>
   <string name="about_title">About</string>
   <string name="settings_account_not_logged_in">Not logged in</string>
+  <string name="prompt_to_sign_in_for_favorites">Get notified about upcoming talks. Your favourite talks are also get synced across all your devices. \n\nTap to sign in</string>
+  <string name="prompt_to_favorite">You have no favourite talks, yet. Find some talk, touch the ♥ button and you are good to go.</string>
+  <string name="achievement_unlocked">Achievement Unlocked: The Fast Learner!</string>
 
   <string name="about_label">About</string>
   <string name="about_powered_by">is powered by</string>

app/src/main/res/values/styles.xml

@@ -449,4 +449,10 @@
     <item name="fontPath">@string/license_notice_typeface</item>
   </style>
 
+  <style name="Favorite.Empty.Text" parent="None">
+    <item name="android:foreground">@drawable/primary_touch_feedback</item>
+    <item name="android:gravity">center_horizontal</item>
+    <item name="android:drawablePadding">@dimen/card_horizontal_margin</item>
+  </style>
+
 </resources>