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// Copyright 2024 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_AUTOFILL_IOS_BROWSER_FORM_FETCH_BATCHER_H_
#define COMPONENTS_AUTOFILL_IOS_BROWSER_FORM_FETCH_BATCHER_H_
#import <optional>
#import <vector>
#import "base/memory/weak_ptr.h"
#import "base/time/time.h"
#import "components/autofill/core/common/form_data.h"
#import "components/autofill/ios/browser/autofill_driver_ios_bridge.h"
#import "ios/web/public/js_messaging/web_frame.h"
namespace autofill {
// Controller for recurrently doing batches of form extraction requests on a
// given frame. Can be safely deleted while there is an ongoing batch where the
// scheduled batch will simply be no op (the equivalent of canceling a task).
// Can only do unfiltered extractions where it gives back all forms that could
// be extracted.
class FormFetchBatcher {
public:
FormFetchBatcher(const FormFetchBatcher&) = delete;
FormFetchBatcher(FormFetchBatcher&&) = delete;
FormFetchBatcher(id<AutofillDriverIOSBridge> bridge,
base::WeakPtr<web::WebFrame> frame,
base::TimeDelta batch_period);
~FormFetchBatcher();
// Pushes a request into the current batch. Automatically schedules a new
// batch if there isn't already one. Consumes the request. Applies
// `form_name_filter` filtering which will filter forms by name when
// specified.
void PushRequest(
FormFetchCompletion&& fetch_request,
std::optional<std::u16string> form_name_filter = std::nullopt);
// Pushes a request into the current batch, runs immediately the current
// batch, and cancels the scheduled task if there is one. Otherwise, works the
// same way as PushRequest().
void PushRequestAndRun(
FormFetchCompletion&& fetch_request,
std::optional<std::u16string> form_name_filter = std::nullopt);
private:
// Runs an extraction of forms in the frame's document to complete the current
// batch of requests. The batch isn't completed yet when calling this as there
// is still the form extraction to be done.
void Run();
// Completes the current batch of pending form extraction requests after
// receiving the results from the scheduled form extraction. Clears the
// pending requests and makes the batcher available for a new batch.
void Complete(std::optional<std::vector<autofill::FormData>> forms);
// Interface for fetching forms.
id<AutofillDriverIOSBridge> bridge_;
// Web frame on which the batcher extract forms.
base::WeakPtr<web::WebFrame> frame_;
// Queued fetch requests for the next scheduled batch.
std::vector<FormFetchCompletion> fetch_requests_;
// Period of time between the batches.
base::TimeDelta batch_period_;
// True if a batch was scheduled, so no further scheduling is required.
bool batch_scheduled_ = false;
base::WeakPtrFactory<FormFetchBatcher> weak_factory_{this};
};
} // namespace autofill
#endif // COMPONENTS_AUTOFILL_IOS_BROWSER_FORM_FETCH_BATCHER_H_
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