Expose Durable Storage API to script

Source/modules/quota/StorageManager.cpp

+// Copyright 2015 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 "config.h"
+#include "modules/quota/StorageManager.h"
+
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "core/dom/Document.h"
+#include "core/dom/ExceptionCode.h"
+#include "modules/permissions/Permissions.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebCallbacks.h"
+#include "public/platform/modules/permissions/WebPermissionClient.h"
+#include "public/platform/modules/permissions/WebPermissionStatus.h"
+
+namespace blink {
+
+namespace {
+
+class DurableStoragePermissionCallbacks final : public WebCallbacks<WebPermissionStatus*, void> {
+public:
+    DurableStoragePermissionCallbacks(ScriptPromiseResolver* resolver)
+        : m_resolver(resolver)
+    {
+    }
+
+    void onSuccess(WebPermissionStatus* rawStatus) override
+    {
+        OwnPtr<WebPermissionStatus> status = adoptPtr(rawStatus);
+        String toReturn;
+        switch (*status) {
+        case WebPermissionStatusGranted:
+            toReturn = "granted";
+            break;
+        case WebPermissionStatusDenied:
+            toReturn = "denied";
+            break;
+        case WebPermissionStatusPrompt:
+            toReturn = "default";
+            break;
+        }
+        m_resolver->resolve(toReturn);
+    }
+    void onError() override
+    {
+        ASSERT_NOT_REACHED();
+    }
+
+private:
+    Persistent<ScriptPromiseResolver> m_resolver;
+};
+
+} // namespace
+
+ScriptPromise StorageManager::requestPersistent(ScriptState* scriptState)
+{
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+    ExecutionContext* executionContext = scriptState->executionContext();
+    SecurityOrigin* securityOrigin = executionContext->securityOrigin();
+    if (securityOrigin->isUnique()) {

[jsbell, 2015/08/10 18:00:37]

I think the isPrivilegedcontext() check would cover the isUnique() case but I'm
not 100% sure. Maybe toss in a TODO to verify?

(From header docs in SecurityOrigin, unique implies sandboxed, and sandboxed
implies not privileged.)

[dgrogan, 2015/08/10 18:39:56]

Done.

+        resolver->reject(DOMException::create(NotSupportedError));
+        return promise;
+    }
+    String errorMessage;
+    if (!executionContext->isPrivilegedContext(errorMessage)) {
+        resolver->reject(DOMException::create(SecurityError, errorMessage));
+        return promise;
+    }
+    ASSERT(executionContext->isDocument());
+    WebPermissionClient* permissionClient = Permissions::getClient(executionContext);
+    if (!permissionClient) {
+        resolver->reject(DOMException::create(InvalidStateError, "In its current state, the global scope can't query permissions."));

[jsbell, 2015/08/10 18:00:37]

nit: s/query/request/ (to match Permissions.cpp)

[dgrogan, 2015/08/10 18:39:56]

Done.

+        return promise;
+    }
+    permissionClient->requestPermission(WebPermissionTypeDurableStorage, KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()), new DurableStoragePermissionCallbacks(resolver));
+
+    return promise;
+}
+
+ScriptPromise StorageManager::persistentPermission(ScriptState* scriptState)
+{
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+    WebPermissionClient* permissionClient = Permissions::getClient(scriptState->executionContext());
+    if (!permissionClient) {
+        resolver->reject(DOMException::create(InvalidStateError, "In its current state, the global scope can't query permissions."));
+        return promise;
+    }
+    permissionClient->queryPermission(WebPermissionTypeDurableStorage, KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()), new DurableStoragePermissionCallbacks(resolver));
+    return promise;
+}
+
+DEFINE_TRACE(StorageManager)
+{
+}
+
+} // namespace blink