Almost all actions in Declarative Web Request require all_urls host permissions

chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_checker.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_CHECKER_H_
+#define CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_CHECKER_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/gtest_prod_util.h"
+#include "chrome/browser/extensions/api/declarative_webrequest/webrequest_action.h"
+#include "chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h"
+#include "chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry.h"
+
+namespace extensions {
+
+class Extension;
+
+// This class encapsulates rules consistency checks for Declarative WebRequest.
+class WebRequestRulesChecker {
+ public:
+  explicit WebRequestRulesChecker(const Extension* extension);
+  WebRequestRule::ConsistencyChecker GetChecker();
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(WebRequestRulesCheckerTest, StageChecker);
+  FRIEND_TEST_ALL_PREFIXES(WebRequestRulesCheckerTest, HostPermissionsChecker);
+
+  // This budles all checkers and is returned by GetChecker. Returns true in
+  // case of consistency and MUST set |error| otherwise.
+  bool Checker(const WebRequestConditionSet* conditions,
+               const WebRequestActionSet* actions,
+               std::string* error);
+
+  // Check that the |extension| has host permissions for all URLs if actions
+  // requiring them are present.
+  bool HostPermissionsChecker(const WebRequestActionSet* actions,
+                              std::string* error);
+  // Check that every action is applicable in the same request stage as at
+  // least one condition.
+  static bool StageChecker(const WebRequestConditionSet* conditions,
+                           const WebRequestActionSet* actions,
+                           std::string* error);
+
+  const Extension* const extension_;
+
+  DISALLOW_COPY_AND_ASSIGN(WebRequestRulesChecker);
+};
+
+}  // namespace extensions
+
+#endif  // CHROME_BROWSER_EXTENSIONS_API_DECLARATIVE_WEBREQUEST_WEBREQUEST_RULES_CHECKER_H_