Added budget_service.mojom

third_party/WebKit/Source/modules/budget/BudgetService.cpp

 // Copyright 2016 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 "modules/budget/BudgetService.h"
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "core/dom/DOMException.h"
 #include "core/dom/ExceptionCode.h"
+#include "modules/budget/BudgetState.h"
+#include "public/platform/InterfaceProvider.h"
+#include "public/platform/Platform.h"
+#include "public/platform/modules/budget_service/budget_service.mojom-blink.h"
 
 namespace blink {
 
-BudgetService::BudgetService() {}
+BudgetService::BudgetService()
+{
+    Platform::current()->interfaceProvider()->getInterface(mojo::GetProxy(&m_service));
 
-ScriptPromise BudgetService::getCost(ScriptState* scriptState, const AtomicString& actionType)
+    // Set a connection error handler, so that if an embedder doesn't
+    // implement a BudgetSerice mojo service, the developer will get a
+    // actionable information.
+    m_service.set_connection_error_handler(convertToBaseCallback(WTF::bind(&BudgetService::onConnectionError, wrapWeakPersistent(this))));
+}
+
+BudgetService::~BudgetService()
 {
-    // TODO(harkness): Trigger the cost calculation.
-    return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError, "Not yet implemented"));
+}
+
+ScriptPromise BudgetService::getCost(ScriptState* scriptState, const AtomicString& /* actionType */)
+{
+    DCHECK(m_service);
+
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+
+    // TODO(harkness): Map the actionType to BudgetOperationType.
+    // Get the cost for the action from the browser BudgetService.
+    mojom::blink::BudgetOperationType type = mojom::blink::BudgetOperationType::SILENT_PUSH;
+    m_service->GetCost(type, convertToBaseCallback(WTF::bind(&BudgetService::gotCost, wrapPersistent(this), wrapPersistent(resolver))));
+    return promise;
+}
+
+void BudgetService::gotCost(ScriptPromiseResolver* resolver, double cost) const
+{
+    resolver->resolve(cost);
 }
 
 ScriptPromise BudgetService::getBudget(ScriptState* scriptState)
 {
-    // TODO(harkness): Trigger the budget calculation.
-    return ScriptPromise::rejectWithDOMException(scriptState, DOMException::create(NotSupportedError, "Not yet implemented"));
+    DCHECK(m_service);
+
+    ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState);
+    ScriptPromise promise = resolver->promise();
+
+    ExecutionContext* context = scriptState->getExecutionContext();
+    if (!context)
+        return promise;
+
+    // Get the budget from the browser BudgetService.
+    RefPtr<SecurityOrigin> origin(context->getSecurityOrigin());
+    m_service->GetBudget(origin, convertToBaseCallback(WTF::bind(&BudgetService::gotBudget, wrapPersistent(this), wrapPersistent(resolver))));
+    return promise;
+}
+
+void BudgetService::gotBudget(ScriptPromiseResolver* resolver, const mojo::WTFArray<mojom::blink::BudgetStatePtr> expectations) const
+{
+    // Copy the chunks into the budget array.
+    HeapVector<Member<BudgetState>> budget(expectations.size());
+    for (size_t i = 0; i < expectations.size(); i++)
+        budget[i] = new BudgetState(expectations[i]->budget_at, expectations[i]->time);
+
+    resolver->resolve(budget);
+}
+
+void BudgetService::onConnectionError()
+{
+    LOG(ERROR) << "Unable to connect to the Mojo BudgetService.";
+    // TODO(harkness): Reject in flight promises.
 }
 
 } // namespace blink