Cleanup extension permissions module.

chrome/browser/extensions/extension_permissions_api_helpers.cc

Index: chrome/browser/extensions/extension_permissions_api_helpers.cc
diff --git a/chrome/browser/extensions/extension_permissions_api_helpers.cc b/chrome/browser/extensions/extension_permissions_api_helpers.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a63909ba729154464010c6b7a8fe75539151bd6f
--- /dev/null
+++ b/chrome/browser/extensions/extension_permissions_api_helpers.cc
@@ -0,0 +1,113 @@
+// 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/extension_permissions_api_helpers.h"
+
+#include "base/values.h"
+#include "chrome/common/extensions/extension.h"
+#include "chrome/common/extensions/extension_error_utils.h"
+#include "chrome/common/extensions/extension_permission_set.h"
+#include "chrome/common/extensions/url_pattern_set.h"
+
+namespace extensions {
+namespace permissions_api {
+
+namespace {
+
+const char kInvalidOrigin[] =
+    "Invalid value for origin pattern *: *";
+const char kUnknownPermissionError[] =
+    "'*' is not a recognized permission.";
+
+const char kApisKey[] = "permissions";
+const char kOriginsKey[] = "origins";
+
+}  // namespace
+
+DictionaryValue* PackPermissionsToValue(const ExtensionPermissionSet* set) {
+  DictionaryValue* value = new DictionaryValue();
+
+  // Generate the list of API permissions.
+  ListValue* apis = new ListValue();
+  ExtensionPermissionsInfo* info = ExtensionPermissionsInfo::GetInstance();
+  for (ExtensionAPIPermissionSet::const_iterator i = set->apis().begin();
+       i != set->apis().end(); ++i)
+    apis->Append(Value::CreateStringValue(info->GetByID(*i)->name()));
+
+  // Generate the list of origin permissions.
+  URLPatternSet hosts = set->explicit_hosts();
+  ListValue* origins = new ListValue();
+  for (URLPatternSet::const_iterator i = hosts.begin(); i != hosts.end(); ++i)
+    origins->Append(Value::CreateStringValue(i->GetAsString()));
+
+  value->Set(kApisKey, apis);
+  value->Set(kOriginsKey, origins);
+  return value;
+}
+
+// Creates a new ExtensionPermissionSet from its |value| and passes ownership to
+// the caller through |ptr|. Sets |bad_message| to true if the message is badly
+// formed. Returns false if the method fails to unpack a permission set.
+bool UnpackPermissionsFromValue(DictionaryValue* value,
+                                scoped_refptr<ExtensionPermissionSet>* ptr,
+                                bool* bad_message,
+                                std::string* error) {
+  ExtensionPermissionsInfo* info = ExtensionPermissionsInfo::GetInstance();
+  ExtensionAPIPermissionSet apis;
+  if (value->HasKey(kApisKey)) {
+    ListValue* api_list = NULL;
+    if (!value->GetList(kApisKey, &api_list)) {
+      *bad_message = true;
+      return false;
+    }
+    for (size_t i = 0; i < api_list->GetSize(); ++i) {
+      std::string api_name;
+      if (!api_list->GetString(i, &api_name)) {
+        *bad_message = true;
+        return false;
+      }
+
+      ExtensionAPIPermission* permission = info->GetByName(api_name);
+      if (!permission) {
+        *error = ExtensionErrorUtils::FormatErrorMessage(
+            kUnknownPermissionError, api_name);
+        return false;
+      }
+      apis.insert(permission->id());
+    }
+  }
+
+  URLPatternSet origins;
+  if (value->HasKey(kOriginsKey)) {
+    ListValue* origin_list = NULL;
+    if (!value->GetList(kOriginsKey, &origin_list)) {
+      *bad_message = true;
+      return false;
+    }
+    for (size_t i = 0; i < origin_list->GetSize(); ++i) {
+      std::string pattern;
+      if (!origin_list->GetString(i, &pattern)) {
+        *bad_message = true;
+        return false;
+      }
+
+      URLPattern origin(Extension::kValidHostPermissionSchemes);
+      URLPattern::ParseResult parse_result = origin.Parse(pattern);
+      if (URLPattern::PARSE_SUCCESS != parse_result) {
+        *error = ExtensionErrorUtils::FormatErrorMessage(
+            kInvalidOrigin,
+            pattern,
+            URLPattern::GetParseResultString(parse_result));
+        return false;
+      }
+      origins.AddPattern(origin);
+    }
+  }
+
+  *ptr = new ExtensionPermissionSet(apis, origins, URLPatternSet());
+  return true;
+}
+
+}  // namespace permissions_api
+}  // namespace extensions