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// 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 "mojo/services/catalog/reader.h"
#include "base/json/json_file_value_serializer.h"
#include "base/location.h"
#include "base/task_runner_util.h"
#include "mojo/services/catalog/entry.h"
#include "mojo/shell/public/cpp/names.h"
namespace catalog {
namespace {
scoped_ptr<base::Value> ReadManifest(const base::FilePath& manifest_path) {
JSONFileValueDeserializer deserializer(manifest_path);
int error = 0;
std::string message;
// TODO(beng): probably want to do more detailed error checking. This should
// be done when figuring out if to unblock connection completion.
return deserializer.Deserialize(&error, &message);
}
void OnReadManifest(base::WeakPtr<Reader> reader,
const std::string& name,
const Reader::ReadManifestCallback& callback,
scoped_ptr<base::Value> manifest) {
if (!reader) {
// The Reader was destroyed, we're likely in shutdown. Run the callback so
// we don't trigger a DCHECK.
callback.Run(nullptr);
return;
}
scoped_ptr<Entry> entry;
if (manifest) {
const base::DictionaryValue* dictionary = nullptr;
CHECK(manifest->GetAsDictionary(&dictionary));
entry = Entry::Deserialize(*dictionary);
}
callback.Run(std::move(entry));
}
} // namespace
Reader::Reader(const base::FilePath& package_path,
base::TaskRunner* file_task_runner)
: package_path_(package_path),
file_task_runner_(file_task_runner),
weak_factory_(this) {}
Reader::~Reader() {}
void Reader::Read(const std::string& name,
const ReadManifestCallback& callback) {
base::FilePath manifest_path = GetManifestPath(name);
if (manifest_path.empty()) {
callback.Run(nullptr);
return;
}
std::string type = mojo::GetNameType(name);
CHECK(type == "mojo" || type == "exe");
base::PostTaskAndReplyWithResult(
file_task_runner_, FROM_HERE, base::Bind(&ReadManifest, manifest_path),
base::Bind(&OnReadManifest, weak_factory_.GetWeakPtr(), name, callback));
}
base::FilePath Reader::GetManifestPath(const std::string& name) const {
// TODO(beng): think more about how this should be done for exe targets.
std::string type = mojo::GetNameType(name);
std::string path = mojo::GetNamePath(name);
if (type == "mojo")
return package_path_.AppendASCII(path + "/manifest.json");
else if (type == "exe")
return package_path_.AppendASCII(path + "_manifest.json");
return base::FilePath();
}
} // namespace catalog
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