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118 lines
3.3 KiB
118 lines
3.3 KiB
// Copyright 2019 The Flutter team. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'dart:convert';
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import 'dart:typed_data';
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import 'package:http/http.dart' as http;
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import 'package:logging/logging.dart';
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import 'api_error.dart';
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import 'photo.dart';
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import 'search_photos_response.dart';
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final _unsplashBaseUrl = Uri.parse('https://api.unsplash.com/');
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/// Unsplash API Client. Requires an
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/// [Unsplash API](https://unsplash.com/developers) `accessKey` to make
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/// requests to the Unsplash API.
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class Unsplash {
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Unsplash({
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required String accessKey,
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http.BaseClient? httpClient,
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}) : _accessKey = accessKey,
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_client = httpClient ?? http.Client();
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final String _accessKey;
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final http.Client _client;
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final _log = Logger('Unsplash');
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Future<SearchPhotosResponse?> searchPhotos({
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required String query,
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num page = 1,
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num perPage = 10,
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List<num> collections = const [],
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SearchPhotosOrientation? orientation,
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}) async {
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final searchPhotosUrl = _unsplashBaseUrl
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.replace(path: '/search/photos', queryParameters: <String, String>{
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'query': query,
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if (page != 1) 'page': '$page',
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if (perPage != 10) 'per_page': '$perPage',
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if (collections.isNotEmpty) 'collections': collections.join(','),
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if (orientation == SearchPhotosOrientation.landscape)
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'orientation': 'landscape',
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if (orientation == SearchPhotosOrientation.portrait)
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'orientation': 'portrait',
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if (orientation == SearchPhotosOrientation.squarish)
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'orientation': 'squarish',
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});
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_log.info('GET $searchPhotosUrl');
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final response = await _client.get(
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searchPhotosUrl,
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headers: {
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'Accept-Version': 'v1',
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'Authorization': 'Client-ID $_accessKey',
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},
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);
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dynamic body;
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try {
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body = json.fuse(utf8).decode(response.bodyBytes);
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} catch (e) {
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throw UnsplashException('Invalid JSON received');
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}
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if (body is Map &&
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body['errors'] is List &&
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body['errors'].isNotEmpty as bool) {
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final apiError = ApiError.fromJson(response.body)!;
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throw UnsplashException(apiError.errors!.join(', '));
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}
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return SearchPhotosResponse.fromJson(json.encode(body));
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}
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Future<Uint8List> download(Photo photo) async {
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// For detail on how downloading photos from Unsplash, please see
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// https://help.unsplash.com/en/articles/2511258-guideline-triggering-a-download
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_log.info('GET ${photo.urls!.full}');
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final futureBytes = http.readBytes(Uri.parse(photo.urls!.full!), headers: {
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'Accept-Version': 'v1',
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'Authorization': 'Client-ID $_accessKey',
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});
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_log.info('GET ${photo.links!.downloadLocation}');
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unawaited(http.get(Uri.parse(photo.links!.downloadLocation!), headers: {
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'Accept-Version': 'v1',
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'Authorization': 'Client-ID $_accessKey',
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}));
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return futureBytes;
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}
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}
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enum SearchPhotosOrientation {
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landscape,
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portrait,
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squarish,
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}
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class UnsplashException implements Exception {
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UnsplashException([this.message]);
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final String? message;
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@override
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String toString() {
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if (message == null) {
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return 'UnsplashException';
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}
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return 'UnsplashException: $message';
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}
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}
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