Source/modules/quota/StorageQuota.cpp

/*
 * Copyright (C) 2014 Google Inc. All rights reserved.
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 * modification, are permitted provided that the following conditions are
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 * in the documentation and/or other materials provided with the
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#include "config.h"
#include "modules/quota/StorageQuota.h"

#include "bindings/core/v8/ScriptPromise.h"
#include "bindings/core/v8/ScriptPromiseResolver.h"
#include "core/dom/DOMError.h"
#include "core/dom/ExceptionCode.h"
#include "core/dom/ExecutionContext.h"
#include "modules/quota/StorageQuotaCallbacksImpl.h"
#include "modules/quota/StorageQuotaClient.h"
#include "platform/weborigin/KURL.h"
#include "platform/weborigin/SecurityOrigin.h"
#include "public/platform/Platform.h"
#include "public/platform/WebStorageQuotaCallbacks.h"
#include "public/platform/WebStorageQuotaType.h"

namespace blink {

namespace {

struct StorageTypeMapping {
    WebStorageQuotaType type;
    const char* const name;
};

const StorageTypeMapping storageTypeMappings[] = {
    { WebStorageQuotaTypeTemporary, "temporary" },
    { WebStorageQuotaTypePersistent, "persistent" },
};

WebStorageQuotaType stringToStorageQuotaType(const String& type)
{
    for (size_t i = 0; i < WTF_ARRAY_LENGTH(storageTypeMappings); ++i) {
        if (storageTypeMappings[i].name == type)
            return storageTypeMappings[i].type;
    }
    ASSERT_NOT_REACHED();
    return WebStorageQuotaTypeTemporary;
}

} // namespace

StorageQuota::StorageQuota()
{
    ScriptWrappable::init(this);
}

Vector<String> StorageQuota::supportedTypes() const
{
    Vector<String> types;
    for (size_t i = 0; i < WTF_ARRAY_LENGTH(storageTypeMappings); ++i)
        types.append(storageTypeMappings[i].name);
    return types;
}

ScriptPromise StorageQuota::queryInfo(ScriptState* scriptState, String type)
{
    RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
    ScriptPromise promise = resolver->promise();

    SecurityOrigin* securityOrigin = scriptState->executionContext()->securityOrigin();
    if (securityOrigin->isUnique()) {
        resolver->reject(DOMError::create(NotSupportedError));
        return promise;
    }

    KURL storagePartition = KURL(KURL(), securityOrigin->toString());
    OwnPtr<StorageQuotaCallbacks> callbacks = StorageQuotaCallbacksImpl::create(resolver);
    Platform::current()->queryStorageUsageAndQuota(storagePartition, stringToStorageQuotaType(type), callbacks.release());
    return promise;
}

ScriptPromise StorageQuota::requestPersistentQuota(ScriptState* scriptState, unsigned long long newQuota)
{
    StorageQuotaClient* client = StorageQuotaClient::from(scriptState->executionContext());
    if (!client) {
        RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
        ScriptPromise promise = resolver->promise();
        resolver->reject(DOMError::create(NotSupportedError));
        return promise;
    }

    return client->requestPersistentQuota(scriptState, newQuota);
}

} // namespace blink