Move 'intents' parsing out of Extension

chrome/common/extensions/web_intents_handler.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/common/extensions/web_intents_handler.h"
+
+#include "base/lazy_instance.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string_number_conversions.h"
+#include "base/utf_string_conversions.h"
+#include "base/values.h"
+#include "chrome/common/extensions/extension_manifest_constants.h"
+#include "extensions/common/error_utils.h"
+#include "webkit/glue/web_intent_service_data.h"
+
+namespace extensions {
+
+namespace keys = extension_manifest_keys;
+namespace values = extension_manifest_values;
+namespace errors = extension_manifest_errors;
+
+namespace {
+
+// Parses a single web intent action in the manifest.
+bool LoadWebIntentsAction(const std::string& action_name,
+                          const DictionaryValue& intent_service,
+                          Extension* extension,
+                          string16* error,
+                          WebIntentServiceDataList* intents_services) {
+  DCHECK(error);
+  webkit_glue::WebIntentServiceData service;
+  std::string value;
+
+  service.action = UTF8ToUTF16(action_name);
+
+  const ListValue* mime_types = NULL;
+  if (!intent_service.HasKey(keys::kIntentType) ||
+      !intent_service.GetList(keys::kIntentType, &mime_types) ||
+      mime_types->GetSize() == 0) {
+    *error = ErrorUtils::FormatErrorMessageUTF16(
+        errors::kInvalidIntentType, action_name);
+    return false;
+  }
+
+  std::string href;
+  if (intent_service.HasKey(keys::kIntentPath)) {
+    if (!intent_service.GetString(keys::kIntentPath, &href)) {
+      *error = ASCIIToUTF16(errors::kInvalidIntentHref);
+      return false;
+    }
+  }
+
+  if (intent_service.HasKey(keys::kIntentHref)) {
+    if (!href.empty()) {
+      *error = ErrorUtils::FormatErrorMessageUTF16(
+          errors::kInvalidIntentHrefOldAndNewKey, action_name,
+          keys::kIntentPath, keys::kIntentHref);
+       return false;
+    }
+    if (!intent_service.GetString(keys::kIntentHref, &href)) {
+      *error = ASCIIToUTF16(errors::kInvalidIntentHref);
+      return false;
+    }
+  }
+
+  // For packaged/hosted apps, empty href implies the respective launch URLs.
+  if (href.empty()) {
+    if (extension->is_hosted_app()) {
+      href = extension->launch_web_url();
+    } else if (extension->is_legacy_packaged_app()) {
+      href = extension->launch_local_path();
+    }
+  }
+
+  // If there still is not an  href, the manifest is malformed, unless this is a
+  // platform app in which case the href should not be present.
+  if (href.empty() && !extension->is_platform_app()) {
+    *error = ErrorUtils::FormatErrorMessageUTF16(
+        errors::kInvalidIntentHrefEmpty, action_name);
+    return false;
+  } else if (!href.empty() && extension->is_platform_app()) {
+    *error = ErrorUtils::FormatErrorMessageUTF16(
+        errors::kInvalidIntentHrefInPlatformApp, action_name);
+    return false;
+  }
+
+  GURL service_url(href);
+  if (extension->is_hosted_app()) {
+    // Hosted apps require an absolute URL for intents.
+    if (!service_url.is_valid() ||
+        !(extension->web_extent().MatchesURL(service_url))) {
+      *error = ErrorUtils::FormatErrorMessageUTF16(
+          errors::kInvalidIntentPageInHostedApp, action_name);
+      return false;
+    }
+    service.service_url = service_url;
+  } else if (extension->is_platform_app()) {
+    service.service_url = extension->GetBackgroundURL();
+  } else {
+    // We do not allow absolute intent URLs in non-hosted apps.
+    if (service_url.is_valid()) {
+      *error = ErrorUtils::FormatErrorMessageUTF16(
+          errors::kCannotAccessPage, href);
+      return false;
+    }
+    service.service_url = extension->GetResourceURL(href);
+  }
+
+  if (intent_service.HasKey(keys::kIntentTitle) &&
+      !intent_service.GetString(keys::kIntentTitle, &service.title)) {
+    *error = ASCIIToUTF16(errors::kInvalidIntentTitle);
+    return false;
+  }
+
+  if (intent_service.HasKey(keys::kIntentDisposition)) {
+    if (extension->is_platform_app()) {
+      *error = ErrorUtils::FormatErrorMessageUTF16(
+          errors::kInvalidIntentDispositionInPlatformApp, action_name);
+      return false;
+    }
+    if (!intent_service.GetString(keys::kIntentDisposition, &value) ||
+        (value != values::kIntentDispositionWindow &&
+         value != values::kIntentDispositionInline)) {
+      *error = ASCIIToUTF16(errors::kInvalidIntentDisposition);
+      return false;
+    }
+    if (value == values::kIntentDispositionInline) {
+      service.disposition =
+          webkit_glue::WebIntentServiceData::DISPOSITION_INLINE;
+    } else {
+      service.disposition =
+          webkit_glue::WebIntentServiceData::DISPOSITION_WINDOW;
+    }
+  }
+
+  for (size_t i = 0; i < mime_types->GetSize(); ++i) {
+    if (!mime_types->GetString(i, &service.type)) {
+      *error = ErrorUtils::FormatErrorMessageUTF16(
+          errors::kInvalidIntentTypeElement, action_name,
+          std::string(base::IntToString(i)));
+      return false;
+    }
+    intents_services->push_back(service);
+  }
+  return true;
+}
+
+}  // namespace
+
+WebIntentsInfo::WebIntentsInfo() {}
+WebIntentsInfo::~WebIntentsInfo() {}
+
+static base::LazyInstance<WebIntentServiceDataList> g_empty_intents_data =
+    LAZY_INSTANCE_INITIALIZER;
+
+// static
+const WebIntentServiceDataList& WebIntentsInfo::GetIntentsServices(
+    const Extension* extension) {
+  WebIntentsInfo* info = static_cast<WebIntentsInfo*>(
+      extension->GetManifestData(keys::kIntents));
+  return info ? info->intents_services_ : g_empty_intents_data.Get();
+}
+
+WebIntentsHandler::WebIntentsHandler() {
+}
+
+WebIntentsHandler::~WebIntentsHandler() {
+}
+
+bool WebIntentsHandler::Parse(const base::Value* value,
+                              Extension* extension,
+                              string16* error) {
+  scoped_ptr<WebIntentsInfo> info(new WebIntentsInfo);
+  const DictionaryValue* all_services = NULL;
+  if (!value->GetAsDictionary(&all_services)) {
+    *error = ASCIIToUTF16(errors::kInvalidIntents);
+    return false;
+  }
+
+  for (DictionaryValue::key_iterator iter(all_services->begin_keys());
+       iter != all_services->end_keys(); ++iter) {
+    // Any entry in the intents dictionary can either have a list of
+    // dictionaries, or just a single dictionary attached to that. Try
+    // lists first, fall back to single dictionary.
+    const ListValue* service_list = NULL;
+    const DictionaryValue* one_service = NULL;
+    if (all_services->GetListWithoutPathExpansion(*iter, &service_list)) {
+      for (size_t i = 0; i < service_list->GetSize(); ++i) {
+        if (!service_list->GetDictionary(i, &one_service)) {
+            *error = ASCIIToUTF16(errors::kInvalidIntent);
+            return false;
+        }
+        if (!LoadWebIntentsAction(*iter, *one_service, extension,
+                                  error, &info->intents_services_))
+          return false;
+      }
+    } else {
+      if (!all_services->GetDictionaryWithoutPathExpansion(*iter,
+                                                           &one_service)) {
+        *error = ASCIIToUTF16(errors::kInvalidIntent);
+        return false;
+      }
+      if (!LoadWebIntentsAction(*iter, *one_service, extension,
+                                error, &info->intents_services_))
+        return false;
+    }
+  }
+  extension->SetManifestData(keys::kIntents, info.release());
+  return true;
+}
+
+}  // namespace extensions