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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_WEBAPPS_BROWSER_INSTALLABLE_METRICS_SITE_MANIFEST_METRICS_TASK_H_
#define COMPONENTS_WEBAPPS_BROWSER_INSTALLABLE_METRICS_SITE_MANIFEST_METRICS_TASK_H_
#include "base/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/raw_ref.h"
#include "base/memory/weak_ptr.h"
#include "components/webapps/browser/installable/installable_data.h"
#include "mojo/public/cpp/bindings/struct_ptr.h"
#include "third_party/blink/public/mojom/manifest/manifest.mojom.h"
namespace contents {
class WebContents;
}
namespace webapps {
// This class is responsible for gathing metrics for the given site on the given
// web contents to emit the "Site.Manifest" UKM events. To stop collection,
// simply destroy this object.
//
// Invariants:
// - `WebContents` is alive during its lifetime of this class.
// - `WebContents` is not navigated during the lifetime of this class and the
// metrics gathered from it are valid for the `GetLastCommittedURL()`
// retrieved on construction of this class.
//
// Browsertests are located in
// chrome/browser/web_applications/ml_promotion_browsertest.cc
class InstallableManager;
struct InstallableData;
class SiteManifestMetricsTask {
public:
using ResultCallback = base::OnceCallback<void(blink::mojom::ManifestPtr)>;
~SiteManifestMetricsTask();
// Create the task, start collecting the manifest from the web_contents and
// pass the task back to the MLInstallabilityPromoter. If the result of
// fetching the manifest is that the URL changed, then we return an empty
// manifest and the MLInstallabilityPromoter handles manifest URL changes.
// If there is no manifest present, the callback runs with a nullptr.
static std::unique_ptr<SiteManifestMetricsTask> CreateAndStart(
content::WebContents& web_contents,
ResultCallback collect_data_and_self_destruct_callback);
private:
SiteManifestMetricsTask(
content::WebContents& web_contents,
ResultCallback collect_data_and_self_destruct_callback);
void Start();
void OnDidFetchManifest(const InstallableData& data);
blink::mojom::ManifestPtr manifest_;
const raw_ref<content::WebContents> web_contents_;
ResultCallback collect_data_and_self_destruct_callback_;
raw_ptr<InstallableManager> manager_;
base::WeakPtrFactory<SiteManifestMetricsTask> weak_factory_{this};
};
} // namespace webapps
#endif // COMPONENTS_WEBAPPS_BROWSER_INSTALLABLE_METRICS_SITE_MANIFEST_METRICS_TASK_H_
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