Start to build groups page

lib/helpers/groups_helper.dart

@@ -1,4 +1,5 @@
 import 'package:comunic/lists/groups_list.dart';
+import 'package:comunic/models/advanced_group_info.dart';
 import 'package:comunic/models/api_request.dart';
 import 'package:comunic/models/group.dart';
 import 'package:comunic/utils/api_utils.dart';
@@ -35,6 +36,17 @@ const _APIGroupsPostsCreationLevelsMap = {
 
 final _groupsListCache = GroupsList();
 
+/// Callback for getting advanced user information
+enum GetAdvancedInfoStatus { SUCCESS, ACCESS_DENIED }
+
+class GetAdvancedInfoResult {
+  final GetAdvancedInfoStatus status;
+  final AdvancedGroupInfo info;
+
+  GetAdvancedInfoResult(this.status, this.info) : assert(status != null);
+}
+
+/// Groups helper
 class GroupsHelper {
   /// Download a list of groups information from the server
   Future<GroupsList> _downloadList(Set<int> groups) async {
@@ -92,6 +104,15 @@ class GroupsHelper {
     return list;
   }
 
+  /// Get information about a single group
+  ///
+  /// Throws in case of failure
+  Future<Group> getSingle(int groupID, {bool force = false}) async {
+    return (await getListOrThrow(Set<int>()..add(groupID), force: force))
+        .values
+        .first;
+  }
+
   /// Get the list of groups of a user
   Future<Set<int>> getListUser() async =>
       (await APIRequest(uri: "groups/get_my_list", needLogin: true).exec())
@@ -127,6 +148,27 @@ class GroupsHelper {
         "accept": accept ? "true" : "false",
       });
 
+  /// Get advanced information about the user
+  Future<GetAdvancedInfoResult> getAdvancedInfo(int groupID) async {
+    // Get advanced information about the user
+    final result =
+        await (APIRequest(uri: "groups/get_advanced_info", needLogin: true)
+              ..addInt("id", groupID))
+            .exec();
+
+    switch (result.code) {
+      case 401:
+        return GetAdvancedInfoResult(GetAdvancedInfoStatus.ACCESS_DENIED, null);
+
+      case 200:
+        return GetAdvancedInfoResult(GetAdvancedInfoStatus.SUCCESS,
+            _getAdvancedGroupInfoFromAPI(result.getObject()));
+
+      default:
+        throw Exception("Could not get advanced group information!");
+    }
+  }
+
   /// Turn an API entry into a group object
   Group _getGroupFromAPI(Map<String, dynamic> map) {
     return Group(
@@ -142,4 +184,25 @@ class GroupsHelper {
         virtualDirectory: map["virtual_directory"],
         following: map["following"]);
   }
+
+  /// Get advanced group information
+  AdvancedGroupInfo _getAdvancedGroupInfoFromAPI(Map<String, dynamic> map) =>
+      AdvancedGroupInfo(
+        id: map["id"],
+        name: map["name"],
+        iconURL: map["icon_url"],
+        numberMembers: map["number_members"],
+        membershipLevel: _APIGroupsMembershipLevelsMap[map["membership"]],
+        visibilityLevel: _APIGroupsVisibilityLevelsMap[map["visibility"]],
+        registrationLevel:
+            _APIGroupsRegistrationLevelsMap[map["registration_level"]],
+        postCreationLevel: _APIGroupsPostsCreationLevelsMap[map["posts_level"]],
+        virtualDirectory: map["virtual_directory"],
+        following: map["following"],
+        timeCreate: map["time_create"],
+        description: map["description"],
+        url: map["url"],
+        numberLikes: map["number_likes"],
+        isLiking: map["is_liking"],
+      );
 }