PaymentHandler: Implement set/get methods in PaymentInstruments (blink)

third_party/WebKit/Source/modules/payments/PaymentInstruments.cpp

 // Copyright 2017 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/payments/PaymentInstruments.h"
 
+#include <utility>
+
+#include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromise.h"
+#include "bindings/core/v8/ScriptPromiseResolver.h"
+#include "bindings/core/v8/V8StringResource.h"
+#include "core/dom/DOMException.h"
 #include "modules/payments/PaymentInstrument.h"
+#include "modules/payments/PaymentManager.h"
+#include "platform/wtf/Vector.h"
 
 namespace blink {
+namespace {
 
-PaymentInstruments::PaymentInstruments() {}
+static const char kPaymentManagerUnavailable[] = "Payment manager unavailable";
+
+bool rejectError(ScriptPromiseResolver* resolver,
+                 payments::mojom::blink::PaymentHandlerStatus status) {
+  switch (status) {
+    case payments::mojom::blink::PaymentHandlerStatus::SUCCESS:
+      return false;
+    case payments::mojom::blink::PaymentHandlerStatus::NOT_IMPLEMENTED:
+      resolver->Reject(
+          DOMException::Create(kNotSupportedError, "Not implemented yet"));
+      return true;
+    case payments::mojom::blink::PaymentHandlerStatus::NOT_FOUND:
+      resolver->Reject(DOMException::Create(kNotFoundError,
+                                            "There is no stored instrument"));
+      return true;
+    case payments::mojom::blink::PaymentHandlerStatus::NO_ACTIVE_WORKER:
+      resolver->Reject(DOMException::Create(kInvalidStateError,
+                                            "There is no stored instrument"));
+      return true;
+    case payments::mojom::blink::PaymentHandlerStatus::STORAGE_OPERATION_FAILED:
+      resolver->Reject(DOMException::Create(kInvalidStateError,
+                                            "There is no stored instrument"));
+      return true;
+  }
+  NOTREACHED();
+  return false;
+}
+
+}  // namespace
+
+PaymentInstruments::PaymentInstruments(
+    const payments::mojom::blink::PaymentManagerPtr& manager)
+    : manager_(manager) {}
 
 ScriptPromise PaymentInstruments::deleteInstrument(
     const String& instrument_key) {
   NOTIMPLEMENTED();
   return ScriptPromise();
 }
 
-ScriptPromise PaymentInstruments::get(const String& instrument_key) {
-  NOTIMPLEMENTED();
-  return ScriptPromise();
+ScriptPromise PaymentInstruments::get(ScriptState* script_state,
+                                      const String& instrument_key) {
+  if (!manager_.is_bound()) {
+    return ScriptPromise::RejectWithDOMException(
+        script_state,
+        DOMException::Create(kInvalidStateError, kPaymentManagerUnavailable));
+  }
+
+  ScriptPromiseResolver* resolver = ScriptPromiseResolver::Create(script_state);
+  ScriptPromise promise = resolver->Promise();
+
+  manager_->GetPaymentInstrument(
+      instrument_key, ConvertToBaseCallback(WTF::Bind(
+                          &PaymentInstruments::onGetPaymentInstrument,
+                          WrapPersistent(this), WrapPersistent(resolver))));
+  return promise;
 }
 
 ScriptPromise PaymentInstruments::keys() {
   NOTIMPLEMENTED();
   return ScriptPromise();
 }
 
 ScriptPromise PaymentInstruments::has(const String& instrument_key) {
   NOTIMPLEMENTED();
   return ScriptPromise();
 }
 
-ScriptPromise PaymentInstruments::set(const String& instrument_key,
-                                      const PaymentInstrument& details) {
-  NOTIMPLEMENTED();
-  return ScriptPromise();
+ScriptPromise PaymentInstruments::set(ScriptState* script_state,
+                                      const String& instrument_key,
+                                      const PaymentInstrument& details,
+                                      ExceptionState& exception_state) {
+  if (!manager_.is_bound()) {
+    return ScriptPromise::RejectWithDOMException(
+        script_state,
+        DOMException::Create(kInvalidStateError, kPaymentManagerUnavailable));
+  }
+
+  ScriptPromiseResolver* resolver = ScriptPromiseResolver::Create(script_state);
+  ScriptPromise promise = resolver->Promise();
+
+  payments::mojom::blink::PaymentInstrumentPtr instrument =
+      payments::mojom::blink::PaymentInstrument::New();
+  instrument->name = details.hasName() ? details.name() : WTF::g_empty_string;
+  if (details.hasEnabledMethods()) {
+    instrument->enabled_methods =
+        WTF::Vector<WTF::String>(details.enabledMethods());

[haraken, 2017/04/13 01:32:31]

Why do we need the static cast?

[zino, 2017/04/15 03:30:10]

Done.

+  }
+
+  if (details.hasCapabilities()) {
+    v8::Local<v8::String> value;
+    if (!v8::JSON::Stringify(script_state->GetContext(),
+                             details.capabilities().V8Value().As<v8::Object>())
+             .ToLocal(&value)) {
+      exception_state.ThrowTypeError(
+          "Capabilities should be a JSON-serializable object");
+      return exception_state.Reject(script_state);
+    }
+    instrument->stringified_capabilities =
+        V8StringToWebCoreString<String>(value, kDoNotExternalize);

[haraken, 2017/04/13 01:32:31]

ToCoreString

[zino, 2017/04/15 03:30:10]

Done.

+  } else {
+    instrument->stringified_capabilities = WTF::g_empty_string;
+  }
+
+  manager_->SetPaymentInstrument(
+      instrument_key, std::move(instrument),
+      ConvertToBaseCallback(
+          WTF::Bind(&PaymentInstruments::onSetPaymentInstrument,
+                    WrapPersistent(this), WrapPersistent(resolver))));
+  return promise;
 }
 
 DEFINE_TRACE(PaymentInstruments) {}
 
+void PaymentInstruments::onGetPaymentInstrument(
+    ScriptPromiseResolver* resolver,
+    payments::mojom::blink::PaymentInstrumentPtr stored_instrument,
+    payments::mojom::blink::PaymentHandlerStatus status) {
+  DCHECK(resolver);
+  if (rejectError(resolver, status))
+    return;
+  PaymentInstrument instrument;
+  instrument.setName(stored_instrument->name);
+  Vector<WTF::String> enabled_methods;

[haraken, 2017/04/13 01:32:31]

Drop WTF::.

[zino, 2017/04/15 03:30:10]

Done.

+  for (const auto& method : stored_instrument->enabled_methods) {
+    enabled_methods.push_back(method);
+  }
+
+  instrument.setEnabledMethods(enabled_methods);
+  if (!stored_instrument->stringified_capabilities.IsEmpty()) {
+    ScriptState::Scope scope(resolver->GetScriptState());
+    ExceptionState exception_state(resolver->GetScriptState()->GetIsolate(),
+                                   ExceptionState::kGetterContext,
+                                   "PaymentInstruments", "get");
+    instrument.setCapabilities(
+        ScriptValue(resolver->GetScriptState(),
+                    FromJSONString(resolver->GetScriptState()->GetIsolate(),
+                                   stored_instrument->stringified_capabilities,
+                                   exception_state)));
+    if (exception_state.HadException()) {
+      resolver->Reject(exception_state.GetException());

[haraken, 2017/04/13 01:32:31]

I guess you need to call exception_state.Clear(). Otherwise, the exception will
be thrown...?

[zino, 2017/04/15 03:30:10]

Done.

I used exception_state.Reject instead.
The function calls ClearException internally.

+      return;
+    }
+  }
+  resolver->Resolve(instrument);
+}
+
+void PaymentInstruments::onSetPaymentInstrument(
+    ScriptPromiseResolver* resolver,
+    payments::mojom::blink::PaymentHandlerStatus status) {
+  DCHECK(resolver);
+  if (rejectError(resolver, status))
+    return;
+  resolver->Resolve();
+}
+
 }  // namespace blink