1 // Copyright (c) 2013 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 #include "chrome/common/extensions/permissions/media_galleries_permission.h"
6
7 #include <set>
8 #include <string>
9
10 #include "base/logging.h"
11 #include "base/strings/utf_string_conversions.h"
12 #include "extensions/common/permissions/permissions_info.h"
13 #include "grit/generated_resources.h"
14 #include "ui/base/l10n/l10n_util.h"
15
16 namespace {
17
18 // copyTo permission requires delete permission as a prerequisite.
19 // delete permission requires read permission as a prerequisite.
IsValidPermissionSet(bool has_read,bool has_copy_to,bool has_delete)20 bool IsValidPermissionSet(bool has_read, bool has_copy_to, bool has_delete) {
21 if (has_copy_to)
22 return has_read && has_delete;
23 if (has_delete)
24 return has_read;
25 return true;
26 }
27
28 } // namespace
29
30 namespace extensions {
31
32 const char MediaGalleriesPermission::kAllAutoDetectedPermission[] =
33 "allAutoDetected";
34 const char MediaGalleriesPermission::kReadPermission[] = "read";
35 const char MediaGalleriesPermission::kCopyToPermission[] = "copyTo";
36 const char MediaGalleriesPermission::kDeletePermission[] = "delete";
37
MediaGalleriesPermission(const APIPermissionInfo * info)38 MediaGalleriesPermission::MediaGalleriesPermission(
39 const APIPermissionInfo* info)
40 : SetDisjunctionPermission<MediaGalleriesPermissionData,
41 MediaGalleriesPermission>(info) {
42 }
43
~MediaGalleriesPermission()44 MediaGalleriesPermission::~MediaGalleriesPermission() {
45 }
46
FromValue(const base::Value * value)47 bool MediaGalleriesPermission::FromValue(const base::Value* value) {
48 if (!SetDisjunctionPermission<MediaGalleriesPermissionData,
49 MediaGalleriesPermission>::FromValue(value)) {
50 return false;
51 }
52
53 bool has_read = false;
54 bool has_copy_to = false;
55 bool has_delete = false;
56 for (std::set<MediaGalleriesPermissionData>::const_iterator it =
57 data_set_.begin(); it != data_set_.end(); ++it) {
58 if (it->permission() == kAllAutoDetectedPermission) {
59 continue;
60 }
61 if (it->permission() == kReadPermission) {
62 has_read = true;
63 continue;
64 }
65 if (it->permission() == kCopyToPermission) {
66 has_copy_to = true;
67 continue;
68 }
69 if (it->permission() == kDeletePermission) {
70 has_delete = true;
71 continue;
72 }
73
74 // No other permissions, so reaching this means
75 // MediaGalleriesPermissionData is probably out of sync in some way.
76 // Fail so developers notice this.
77 NOTREACHED();
78 return false;
79 }
80
81 return IsValidPermissionSet(has_read, has_copy_to, has_delete);
82 }
83
GetMessages() const84 PermissionMessages MediaGalleriesPermission::GetMessages() const {
85 DCHECK(HasMessages());
86 PermissionMessages result;
87
88 bool has_all_auto_detected = false;
89 bool has_read = false;
90 bool has_copy_to = false;
91 bool has_delete = false;
92
93 for (std::set<MediaGalleriesPermissionData>::const_iterator it =
94 data_set_.begin(); it != data_set_.end(); ++it) {
95 if (it->permission() == kAllAutoDetectedPermission)
96 has_all_auto_detected = true;
97 else if (it->permission() == kReadPermission)
98 has_read = true;
99 else if (it->permission() == kCopyToPermission)
100 has_copy_to = true;
101 else if (it->permission() == kDeletePermission)
102 has_delete = true;
103 }
104
105 if (!IsValidPermissionSet(has_read, has_copy_to, has_delete)) {
106 NOTREACHED();
107 return result;
108 }
109
110 // If |has_all_auto_detected| is false, then Chrome will prompt the user at
111 // runtime when the extension call the getMediaGalleries API.
112 if (!has_all_auto_detected)
113 return result;
114 // No access permission case.
115 if (!has_read)
116 return result;
117
118 // Separate PermissionMessage IDs for read, copyTo, and delete. Otherwise an
119 // extension can silently gain new access capabilities.
120 result.push_back(PermissionMessage(
121 PermissionMessage::kMediaGalleriesAllGalleriesRead,
122 l10n_util::GetStringUTF16(
123 IDS_EXTENSION_PROMPT_WARNING_MEDIA_GALLERIES_READ)));
124
125 // For copyTo and delete, the proper combined permission message will be
126 // derived in ChromePermissionMessageProvider::GetWarningMessages(), such
127 // that the user get 1 entry for all media galleries access permissions,
128 // rather than several separate entries.
129 if (has_copy_to) {
130 result.push_back(PermissionMessage(
131 PermissionMessage::kMediaGalleriesAllGalleriesCopyTo,
132 base::string16()));
133 }
134 if (has_delete) {
135 result.push_back(PermissionMessage(
136 PermissionMessage::kMediaGalleriesAllGalleriesDelete,
137 base::string16()));
138 }
139 return result;
140 }
141
142 } // namespace extensions
143