comunicmobile/lib/utils/post_utils.dart

import 'package:comunic/enums/post_visibility_level.dart';
import 'package:comunic/ui/tiles/post_visibility_level_tile.dart';
import 'package:comunic/utils/intl_utils.dart';
import 'package:flutter/material.dart';
import 'package:meta/meta.dart';

/// Post utilities
///
/// @author Pierre HUBERT

/// Show post visibility level picker and return selected visibility level
Future<PostVisibilityLevel> showPostVisibilityPicker({
  @required BuildContext context,
  @required PostVisibilityLevel initialLevel,
  @required bool isGroup,
}) async {
  assert(context != null);
  assert(initialLevel != null);
  assert(isGroup != null);

  final newLevel = await showDialog<PostVisibilityLevel>(
    context: context,
    builder: (c) => AlertDialog(
          title: Text(tr("Select new post visibility level")),

          // Show all options
          content: Column(
            children: <Widget>[
              // Public
              PostVisibilityLevelTile(
                level: PostVisibilityLevel.PUBLIC,
                title: tr("Public"),
                onSelect: (o) => Navigator.pop(c, o),
              ),

              // Friends only (User page only)
              PostVisibilityLevelTile(
                level: PostVisibilityLevel.FRIENDS,
                title: tr("Friends only"),
                onSelect: (o) => Navigator.pop(c, o),
                visible: !isGroup,
              ),

              // User only (User page only)
              PostVisibilityLevelTile(
                level: PostVisibilityLevel.USER,
                title: tr("Me only"),
                onSelect: (o) => Navigator.pop(c, o),
                visible: !isGroup,
              ),

              // Group members only (Group page only)
              PostVisibilityLevelTile(
                level: PostVisibilityLevel.GROUP_MEMBERS,
                title: tr("Group members only"),
                onSelect: (o) => Navigator.pop(c, o),
                visible: isGroup,
              ),
            ],
          ),

          // Dialog actions
          actions: <Widget>[
            // Cancel
            FlatButton(
              child: Text(tr("Cancel").toUpperCase()),
              onPressed: () => Navigator.pop(c, null),
            ),
          ],
        ),
  );

  return newLevel == null ? initialLevel : newLevel;
}