Expose Durable Storage API to script

Source/modules/quota/StorageManager.cpp

Index: Source/modules/quota/StorageManager.cpp
diff --git a/Source/modules/quota/StorageManager.cpp b/Source/modules/quota/StorageManager.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2a868e95e02fe4badfdf05172bed3ecbb76ac079
--- /dev/null
+++ b/Source/modules/quota/StorageManager.cpp
@@ -0,0 +1,112 @@
+// 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/DOMError.h"
+#include "core/dom/Document.h"
+#include "modules/permissions/PermissionController.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 {
+
+WebPermissionClient* getPermissionClient(ExecutionContext* executionContext)

[mlamouri (slow - plz ping), 2015/07/16 10:12:17]

Maybe you can move that to static Permissions::GetClient(ExecutionContext*)?

Add a TODO on my name. I think ideally, the client should supplement the
ExecutionContext or something like that.

[dgrogan, 2015/07/16 19:15:52]

Ok, I will give that a shot and break it off into a different CL if it works
out. Though the cross-module dependency issue will be part of the TODO.

+{
+    if (executionContext->isDocument()) {
+        Document* document = toDocument(executionContext);
+        if (!document->frame())
+            return nullptr;
+        PermissionController* controller = PermissionController::from(*document->frame());
+        return controller ? controller->client() : nullptr;
+    }
+    return Platform::current()->permissionClient();
+}
+
+} // namespace
+
+class DurableStoragePermissionCallbacks : public WebCallbacks<WebPermissionStatus, void> {
+public:
+    DurableStoragePermissionCallbacks(PassRefPtr<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:
+    RefPtr<ScriptPromiseResolver> m_resolver;
+};
+
+ScriptPromise StorageManager::requestPersistent(ScriptState* scriptState)
+{
+    WTF_LOG_ERROR("Got into StorageManager::requestPersistent");
+    RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+    ExecutionContext* executionContext = scriptState->executionContext();
+    SecurityOrigin* securityOrigin = executionContext->securityOrigin();
+    // TODO(dgrogan): Restrict to secure contexts, both here and in the browser
+    // process. https://github.com/whatwg/storage/issues/5
+    if (securityOrigin->isUnique()) {
+        resolver->reject(DOMException::create(NotSupportedError));
+        return promise;
+    }
+    if (executionContext->isDocument()) {
+        WebPermissionClient* permissionClient = getPermissionClient(executionContext);
+        ASSERT(permissionClient);
+        permissionClient->requestDurablePermission(KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()), new DurableStoragePermissionCallbacks(resolver));
+    } else {
+        // worker
+        resolver->reject(DOMException::create(NotSupportedError));
+        return promise;
+    }
+
+    return promise;
+}
+
+ScriptPromise StorageManager::persistentPermission(ScriptState* scriptState)
+{
+    RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+    ExecutionContext* executionContext = scriptState->executionContext();
+    SecurityOrigin* securityOrigin = executionContext->securityOrigin();
+    // TODO(dgrogan): Restrict to secure contexts, both here and in the browser
+    // process. https://github.com/whatwg/storage/issues/5
+    if (securityOrigin->isUnique()) {
+        // Add a test for this branch.
+        resolver->resolve("denied"); // Move to a constant.
+        return promise;
+    }
+    WebPermissionClient* permissionClient = getPermissionClient(executionContext);
+    permissionClient->queryPermission(WebPermissionTypeDurableStorage, KURL(KURL(), scriptState->executionContext()->securityOrigin()->toString()),  new DurableStoragePermissionCallbacks(resolver));
+    return promise;
+}
+
+}