Empty screens: Implement people empty screen.

Riot/Modules/People/PeopleViewController.m

@@ -461,4 +461,53 @@
     [super searchBarCancelButtonClicked:searchBar];
 }
 
+#pragma mark - Empty view management
+
+- (void)updateEmptyView
+{
+    [self.emptyView fillWith:[UIImage imageNamed:@"people_empty_screen_artwork"]
+                       title:NSLocalizedStringFromTable(@"people_empty_view_title", @"Vector", nil)
+             informationText:NSLocalizedStringFromTable(@"people_empty_view_information", @"Vector", nil)];
+}
+
+- (BOOL)shouldShowEmptyView
+{
+    return [self totalItemCounts] == 0;
+}
+
+// Total items to display on the screen
+- (NSUInteger)totalItemCounts
+{
+    return recentsDataSource.invitesCellDataArray.count
+    + recentsDataSource.conversationCellDataArray.count
+    + recentsDataSource.peopleCellDataArray.count
+    + [self numberOfContactsInContactsDataSource];
+}
+
+- (NSUInteger)numberOfContactsInContactsDataSource
+{
+    BOOL areLocalContactsAccessAuthorized = [CNContactStore authorizationStatusForEntityType:CNEntityTypeContacts] == CNAuthorizationStatusAuthorized;
+    
+    NSInteger nbOfItemsInContactDataSource = 0;
+    
+    for (NSInteger i = 0; i < contactsSectionNumber; i++)
+    {
+        nbOfItemsInContactDataSource += [contactsDataSource tableView:self.recentsTableView numberOfRowsInSection:i];
+    }
+    
+    NSInteger numberOfContactsInContactsDataSource;
+    
+    // No local contacts to show and no search in directory
+    if (!areLocalContactsAccessAuthorized && contactsSectionNumber == 1 && nbOfItemsInContactDataSource <= 1)
+    {
+        numberOfContactsInContactsDataSource = 0;
+    }
+    else
+    {
+        numberOfContactsInContactsDataSource = nbOfItemsInContactDataSource;
+    }
+    
+    return numberOfContactsInContactsDataSource;
+}
+
 @end