Can update posts visibility levels

lib/ui/tiles/post_tile.dart

@@ -18,6 +18,7 @@ import 'package:comunic/ui/widgets/network_image_widget.dart';
 import 'package:comunic/utils/date_utils.dart';
 import 'package:comunic/utils/files_utils.dart';
 import 'package:comunic/utils/intl_utils.dart';
+import 'package:comunic/utils/post_utils.dart';
 import 'package:comunic/utils/ui_utils.dart';
 import 'package:flutter/material.dart';
 
@@ -98,12 +99,12 @@ class _PostTileState extends State<PostTile> {
           ),
         ),
 
-        PopupMenuButton(
+        InkWell(
           child: Icon(
             PostVisibilityLevelsMapIcons[widget.post.visibilityLevel],
             color: Colors.grey,
           ),
-          itemBuilder: (c) => [],
+          onTap: widget.post.canUpdate ? updatePostVisibilityLevel : null,
         ),
 
         PopupMenuButton<_PostActions>(
@@ -457,6 +458,25 @@ class _PostTileState extends State<PostTile> {
     }
   }
 
+  /// Update post visibility level
+  Future<void> updatePostVisibilityLevel() async {
+    final newLevel = await showPostVisibilityPicker(
+      context: context,
+      initialLevel: widget.post.visibilityLevel,
+      isGroup: widget.post.isGroupPost,
+    );
+
+    if (newLevel == null || newLevel == widget.post.visibilityLevel) return;
+
+    // Update post visibility
+    if (!await _postsHelper.setVisibility(widget.post.id, newLevel)) {
+      showSimpleSnack(context, tr("Could not update post visibility!"));
+      return;
+    }
+
+    setState(() => widget.post.visibilityLevel = newLevel);
+  }
+
   /// Update post content
   Future<void> updateContent() async {
     final newContent = await askUserString(

lib/ui/tiles/post_visibility_level_tile.dart

@@ -0,0 +1,38 @@
+import 'package:comunic/enums/post_visibility_level.dart';
+import 'package:flutter/material.dart';
+
+/// Post visibility level tile
+///
+/// @author Pierre HUBERT
+
+class PostVisibilityLevelTile extends StatelessWidget {
+  final PostVisibilityLevel level;
+  final String title;
+  final void Function(PostVisibilityLevel) onSelect;
+  final bool visible;
+
+  const PostVisibilityLevelTile({
+    Key key,
+    @required this.level,
+    @required this.title,
+    @required this.onSelect,
+    this.visible = true,
+  })  : assert(level != null),
+        assert(title != null),
+        assert(onSelect != null),
+        assert(visible != null),
+        super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+
+    if(!visible)
+      return Container();
+
+    return ListTile(
+      leading: Icon(PostVisibilityLevelsMapIcons[level]),
+      title: Text(title),
+      onTap: () => onSelect(level),
+    );
+  }
+}