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/BudgetChunk.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)
+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 OperationType.
+    mojom::blink::OperationType type = mojom::blink::OperationType::SILENT_PUSH;
+    m_service->GetCost(type, convertToBaseCallback(WTF::bind(&BudgetService::asyncGetCost, wrapPersistent(this), wrapPersistent(resolver))));
+    return promise;
+}
+
+void BudgetService::asyncGetCost(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();
+
+    // TODO(harkness): Get the origin from the ScriptState.
+    RefPtr<SecurityOrigin> origin(scriptState->getExecutionContext()->getSecurityOrigin());
+    m_service->GetBudget(origin, convertToBaseCallback(WTF::bind(&BudgetService::asyncGetBudget, wrapPersistent(this), unretained(scriptState), wrapPersistent(resolver))));

[harkness, 2016/08/15 01:06:39]

I couldn't find documentation about when to use unretained() vs. the various
wrap options. Is the use of unretained() safe if I check it in the return? Or do
I need to do more work? Is this documented anywhere?

+    return promise;
+}
+
+void BudgetService::asyncGetBudget(ScriptState* scriptState, ScriptPromiseResolver* resolver, const mojo::WTFArray<mojom::blink::BudgetStatePtr> expectations) const
+{
+
+    Vector<v8::Local<v8::Value>> budget;
+    if (!scriptState) {
+        resolver->resolve(budget);
+        return;
+    }
+
+    // Copy the chunks into the budget array.
+    budget.grow(expectations.size());
+    for (uint i = 0; i < expectations.size(); i++) {
+        BudgetChunk chunk;
+        chunk.setAmount(expectations[i]->budget_at);
+        chunk.setExpiration(expectations[i]->time);
+
+        budget[i] = freezeV8Object(toV8(chunk, scriptState), scriptState->isolate());

[harkness, 2016/08/15 01:06:39]

This line crashes, uploading so you can take a look.

+    }
+
+    resolver->resolve(budget);
 }
 
 } // namespace blink