GroupsViewController: Add space beta announce cell.

Riot/Modules/Communities/DataSources/GroupsDataSource.m

@@ -15,9 +15,77 @@
  */
 
 #import "GroupsDataSource.h"
+#import "Riot-Swift.h"
+
+@interface GroupsDataSource() <BetaAnnounceCellDelegate>
+
+@property (nonatomic) NSInteger betaAnnounceSection;
+@property (nonatomic) BOOL showBetaAnnounce;
+
+@end
 
 @implementation GroupsDataSource
 
+- (instancetype)initWithMatrixSession:(MXSession *)matrixSession
+{
+    self = [super initWithMatrixSession:matrixSession];
+    if (self)
+    {
+        _showBetaAnnounce = !RiotSettings.shared.hideSpaceBetaAnnounce;
+    }
+    return self;
+}
+
+- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
+{
+    NSInteger count = 0;
+    self.betaAnnounceSection = self.groupInvitesSection = self.joinedGroupsSection = -1;
+    
+    // Check whether all data sources are ready before rendering groups.
+    if (self.state == MXKDataSourceStateReady)
+    {
+        if (self.showBetaAnnounce)
+        {
+            self.betaAnnounceSection = count++;
+        }
+        if (groupsInviteCellDataArray.count)
+        {
+            self.groupInvitesSection = count++;
+        }
+        if (groupsCellDataArray.count)
+        {
+            self.joinedGroupsSection = count++;
+        }
+    }
+    
+    return count;
+}
+
+- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
+{
+    if (indexPath.section == self.betaAnnounceSection)
+    {
+        BetaAnnounceCell *cell = [tableView dequeueReusableCellWithIdentifier:BetaAnnounceCell.reuseIdentifier forIndexPath:indexPath];
+        [cell vc_hideSeparator];
+        [cell updateWithTheme:ThemeService.shared.theme];
+        cell.delegate = self;
+        return cell;
+        
+    }
+    
+    return [super tableView:tableView cellForRowAtIndexPath:indexPath];
+}
+
+- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
+{
+    if (section == self.betaAnnounceSection)
+    {
+        return 1;
+    }
+    
+    return [super tableView:tableView numberOfRowsInSection:section];
+}
+
 - (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
 {
     NSString* sectionTitle = nil;
@@ -44,4 +112,13 @@
     return (indexPath.section == self.joinedGroupsSection);
 }
 
+#pragma mark - BetaAnnounceCellDelegate
+
+- (void)betaAnnounceCellDidTapCloseButton:(BetaAnnounceCell *)cell
+{
+    self.showBetaAnnounce = NO;
+    RiotSettings.shared.hideSpaceBetaAnnounce = YES;
+    [self.delegate dataSource:self didCellChange:nil];
+}
+
 @end