Implementation of beginning of Declarative Web Request API backend

chrome/browser/extensions/api/declarative_webrequest/webrequest_rule.cc

+// Copyright (c) 2012 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.
+
+#include "chrome/browser/extensions/api/declarative_webrequest/webrequest_rule.h"
+
+#include "base/logging.h"
+#include "chrome/browser/extensions/api/declarative_webrequest/webrequest_action.h"
+#include "chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h"
+
+namespace extensions {
+
+WebRequestRule::WebRequestRule(
+    const GlobalRuleId& id,
+    scoped_ptr<WebRequestConditionSet> conditions,
+    scoped_ptr<WebRequestActionSet> actions)
+    : id_(id),
+      conditions_(conditions.release()),
+      actions_(actions.release()) {
+  CHECK(conditions_.get());
+  CHECK(actions_.get());
+}
+
+WebRequestRule::~WebRequestRule() {}
+
+// static
+bool WebRequestRule::CheckConsistency(
+    WebRequestConditionSet* conditions,
+    WebRequestActionSet* actions,
+    std::string* error) {
+  // TODO(battre): Implement this.
+  return true;
+}
+
+// static
+scoped_ptr<WebRequestRule> WebRequestRule::Create(
+    URLMatcherConditionFactory* url_matcher_condition_factory,
+    const std::string& extension_id,
+    linked_ptr<RulesRegistry::Rule> rule,
+    std::string* error) {
+  scoped_ptr<WebRequestRule> error_result;
+
+  scoped_ptr<WebRequestConditionSet> conditions =
+      WebRequestConditionSet::Create(
+          url_matcher_condition_factory, rule->conditions, error);
+  if (!error->empty())
+    return error_result.Pass();
+  CHECK(conditions.get());
+
+  scoped_ptr<WebRequestActionSet> actions =
+      WebRequestActionSet::Create(rule->actions, error);
+  if (!error->empty())
+    return error_result.Pass();
+  CHECK(actions.get());
+
+  if (!CheckConsistency(conditions.get(), actions.get(), error)) {
+    DCHECK(!error->empty());
+    return error_result.Pass();
+  }
+
+  GlobalRuleId rule_id = make_pair(extension_id, *(rule->id));
+  return scoped_ptr<WebRequestRule>(
+      new WebRequestRule(rule_id, conditions.Pass(), actions.Pass()));
+}
+
+}  // namespace extensions