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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_DOWNLOADER_H_ | |
6 #define SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_DOWNLOADER_H_ | |
7 | |
8 #include <memory> | |
9 #include <string> | |
10 | |
11 #include "base/callback.h" | |
12 #include "google_apis/gaia/oauth2_token_service_request.h" | |
13 #include "sync/api/attachments/attachment.h" | |
14 #include "sync/base/sync_export.h" | |
15 #include "sync/internal_api/public/base/model_type.h" | |
16 | |
17 namespace net { | |
18 class URLRequestContextGetter; | |
19 } // namespace net | |
20 | |
21 namespace syncer { | |
22 | |
23 // AttachmentDownloader is responsible for downloading attachments from server. | |
24 class SYNC_EXPORT AttachmentDownloader { | |
25 public: | |
26 // The result of a DownloadAttachment operation. | |
27 enum DownloadResult { | |
28 DOWNLOAD_SUCCESS, // No error, attachment was downloaded | |
29 // successfully. | |
30 DOWNLOAD_TRANSIENT_ERROR, // A transient error occurred, try again later. | |
31 DOWNLOAD_UNSPECIFIED_ERROR, // An unspecified error occurred. | |
32 }; | |
33 | |
34 typedef base::Callback<void(const DownloadResult&, | |
35 std::unique_ptr<Attachment>)> | |
36 DownloadCallback; | |
37 | |
38 virtual ~AttachmentDownloader(); | |
39 | |
40 // Download attachment referred by |attachment_id| and invoke |callback| when | |
41 // done. | |
42 // | |
43 // |callback| will receive a DownloadResult code and an Attachment object. If | |
44 // DownloadResult is not DOWNLOAD_SUCCESS then attachment pointer is NULL. | |
45 virtual void DownloadAttachment(const AttachmentId& attachment_id, | |
46 const DownloadCallback& callback) = 0; | |
47 | |
48 // Create instance of AttachmentDownloaderImpl. | |
49 // |sync_service_url| is the URL of the sync service. | |
50 // | |
51 // |url_request_context_getter| provides a URLRequestContext. | |
52 // | |
53 // |account_id| is the account id to use for downloads. | |
54 // | |
55 // |scopes| is the set of scopes to use for downloads. | |
56 // | |
57 // |token_service_provider| provides an OAuth2 token service. | |
58 // | |
59 // |store_birthday| is the raw, sync store birthday. | |
60 // | |
61 // |model_type| is the model type this downloader is used with. | |
62 static std::unique_ptr<AttachmentDownloader> Create( | |
63 const GURL& sync_service_url, | |
64 const scoped_refptr<net::URLRequestContextGetter>& | |
65 url_request_context_getter, | |
66 const std::string& account_id, | |
67 const OAuth2TokenService::ScopeSet scopes, | |
68 const scoped_refptr<OAuth2TokenServiceRequest::TokenServiceProvider>& | |
69 token_service_provider, | |
70 const std::string& store_birthday, | |
71 ModelType model_type); | |
72 }; | |
73 | |
74 } // namespace syncer | |
75 | |
76 #endif // SYNC_INTERNAL_API_PUBLIC_ATTACHMENTS_ATTACHMENT_DOWNLOADER_H_ | |
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