comunicmobile/lib/helpers/conversations_helper.dart

import 'package:comunic/helpers/database/conversations_database_helper.dart';
import 'package:comunic/lists/conversations_list.dart';
import 'package:comunic/lists/users_list.dart';
import 'package:comunic/models/api_request.dart';
import 'package:comunic/models/conversation.dart';
import 'package:comunic/utils/account_utils.dart';

/// Conversation helper
///
/// @author Pierre HUBERT

class ConversationsHelper {
  final ConversationsDatabaseHelper _conversationsDatabaseHelper =
      ConversationsDatabaseHelper();

  /// Download the list of conversations from the server
  Future<ConversationsList> downloadList() async {
    final response =
        await APIRequest(uri: "conversations/getList", needLogin: true).exec();

    if (response.code != 200) return null;

    try {
      ConversationsList list = ConversationsList();
      response.getArray().forEach((f) => list.add(Conversation(
            id: f["ID"],
            ownerID: f["ID_owner"],
            lastActive: f["last_active"],
            name: f["name"] == false ? null : f["name"],
            following: f["following"] == 1,
            sawLastMessage: f["saw_last_message"] == 1,
            members: f["members"].map<int>((f) => int.parse(f)).toList(),
          )));

      // Update the database
      await _conversationsDatabaseHelper.clearTable();
      await _conversationsDatabaseHelper.insertAll(list);

      return list;
    } on Exception catch (e) {
      print(e.toString());
      return null;
    }
  }

  /// Get the name of a [conversation]. This requires information about the
  /// users of this conversation
  static String getConversationName(
      Conversation conversation, UsersList users) {
    if (conversation.has_name) return conversation.name;

    String name = "";
    int count = 0;
    for (int i = 0; i < 3 && i < conversation.members.length; i++)
      if (conversation.members[i] != userID()) {
        name += (count > 0 ? ", " : "") +
            users.getUser(conversation.members[i]).fullName;
        count++;
      }

    if (conversation.members.length > 3) name += ", ...";

    return name;
  }
}