loris/lib/business_logic/instance/instance.dart

import 'dart:convert';

import 'package:http/http.dart';
import 'package:loris/global.dart' as global;

class InstanceInformation {
  final InstanceConfiguration configuration;

  InstanceInformation(this.configuration);
  static InstanceInformation fromJson(Map<String, dynamic> json) {
    return InstanceInformation(
      InstanceConfiguration.fromJson(
        json["configuration"],
      ),
    );
  }
}

class InstanceConfiguration {
  final StatusConfiguration statusconfig;

  InstanceConfiguration(this.statusconfig);
  static InstanceConfiguration fromJson(Map<String, dynamic> json) {
    return InstanceConfiguration(
      StatusConfiguration.fromJson(json["statuses"]),
    );
  }
}

class StatusConfiguration {
  final int maxChars;
  final int maxMediaAttachments;

  StatusConfiguration(this.maxChars, this.maxMediaAttachments);
  static StatusConfiguration fromJson(Map<String, dynamic> json) {
    return StatusConfiguration(
      json["max_characters"],
      json["max_media_attachments"],
    );
  }
}

Future<Map<int, InstanceInformation?>> instanceInformationForIdentity(
  String id,
) async {
  final Uri url = Uri(
    scheme: "https",
    host: global.settings!.identities[id]!.instanceUrl,
    path: "/api/v1/instance",
  );
  final response = await get(
    url,
    headers: global.defaultHeaders,
  );
  if (response.statusCode != 200) {
    return {response.statusCode: null};
  }
  return {
    response.statusCode: InstanceInformation.fromJson(jsonDecode(response.body))
  };
}