extensions/browser/requirements_checker.h

   1 // Copyright 2015 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 CHROME_BROWSER_EXTENSIONS_REQUIREMENTS_CHECKER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_REQUIREMENTS_CHECKER_H_
   7
   8 #include <vector>
   9
  10 #include "base/callback.h"
  11 #include "base/memory/ref_counted.h"
  12
  13 namespace extensions {
  14 class Extension;
  15
  16 // Validates the 'requirements' extension manifest field. This is an
  17 // asynchronous process that involves several threads, but the public interface
  18 // of this class (including constructor and destructor) must only be used on
  19 // the UI thread.
  20 class RequirementsChecker {
  21  public:
  22   virtual ~RequirementsChecker() {}
  23
  24   using RequirementsCheckedCallback =
  25       base::Callback<void(const std::vector<std::string>& /* requirements */)>;
  26
  27   // The vector passed to the callback are any localized errors describing
  28   // requirement violations. If this vector is non-empty, requirements checking
  29   // failed. This should only be called once. |callback| will always be invoked
  30   // asynchronously on the UI thread. |callback| will only be called once, and
  31   // will be reset after called.
  32   virtual void Check(const scoped_refptr<const Extension>& extension,
  33                      const RequirementsCheckedCallback& callback) = 0;
  34 };
  35
  36 }  // namespace extensions
  37
  38 #endif  // CHROME_BROWSER_EXTENSIONS_REQUIREMENTS_CHECKER_H_