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      1 // Copyright 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/manifest_handlers/minimum_chrome_version_checker.h"
      6 
      7 #include "base/strings/utf_string_conversions.h"
      8 #include "base/version.h"
      9 #include "chrome/common/chrome_version_info.h"
     10 #include "chrome/common/extensions/extension.h"
     11 #include "chrome/common/extensions/extension_manifest_constants.h"
     12 #include "extensions/common/error_utils.h"
     13 #include "grit/chromium_strings.h"
     14 #include "ui/base/l10n/l10n_util.h"
     15 
     16 namespace keys = extension_manifest_keys;
     17 namespace errors = extension_manifest_errors;
     18 
     19 namespace extensions {
     20 
     21 MinimumChromeVersionChecker::MinimumChromeVersionChecker() {
     22 }
     23 
     24 MinimumChromeVersionChecker::~MinimumChromeVersionChecker() {
     25 }
     26 
     27 bool MinimumChromeVersionChecker::Parse(Extension* extension, string16* error) {
     28   std::string minimum_version_string;
     29   if (!extension->manifest()->GetString(keys::kMinimumChromeVersion,
     30                                         &minimum_version_string)) {
     31     *error = ASCIIToUTF16(errors::kInvalidMinimumChromeVersion);
     32     return false;
     33   }
     34 
     35   Version minimum_version(minimum_version_string);
     36   if (!minimum_version.IsValid()) {
     37     *error = ASCIIToUTF16(errors::kInvalidMinimumChromeVersion);
     38     return false;
     39   }
     40 
     41   chrome::VersionInfo current_version_info;
     42   Version current_version(current_version_info.Version());
     43   if (!current_version.IsValid()) {
     44     NOTREACHED();
     45     return false;
     46   }
     47 
     48   if (current_version.CompareTo(minimum_version) < 0) {
     49     *error = ErrorUtils::FormatErrorMessageUTF16(
     50         errors::kChromeVersionTooLow,
     51         l10n_util::GetStringUTF8(IDS_PRODUCT_NAME),
     52         minimum_version_string);
     53     return false;
     54   }
     55   return true;
     56 }
     57 
     58 const std::vector<std::string> MinimumChromeVersionChecker::Keys() const {
     59   return SingleKey(keys::kMinimumChromeVersion);
     60 }
     61 
     62 }  // namespace extensions
     63