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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1.  Redistributions of source code must retain the above copyright
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 *     documentation and/or other materials provided with the distribution.
 * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
 *     its contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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 */

#ifndef THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FORMS_FILE_CHOOSER_H_
#define THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FORMS_FILE_CHOOSER_H_

#include "mojo/public/cpp/bindings/binding.h"
#include "third_party/blink/public/mojom/choosers/file_chooser.mojom-blink.h"
#include "third_party/blink/renderer/core/page/popup_opening_observer.h"
#include "third_party/blink/renderer/platform/heap/handle.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
#include "third_party/blink/renderer/platform/weborigin/kurl.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"
#include "third_party/blink/renderer/platform/wtf/ref_counted.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/vector.h"

namespace blink {

class ChromeClientImpl;
class FileChooser;
class LocalFrame;

using FileChooserFileInfoList = Vector<mojom::blink::FileChooserFileInfoPtr>;

class CORE_EXPORT FileChooserClient : public PopupOpeningObserver {
 public:
  virtual void FilesChosen(FileChooserFileInfoList,
                           const base::FilePath& base_dir) = 0;
  virtual LocalFrame* FrameOrNull() const = 0;
  ~FileChooserClient() override;

  // Accessor for chooser_. This returns null before NewFileChooser() and after
  // DisconnectFileChooser().
  FileChooser* FileChooserOrNull() const { return chooser_.get(); }

 protected:
  FileChooser* NewFileChooser(const mojom::blink::FileChooserParams&);
  bool HasConnectedFileChooser() const { return chooser_.get(); }

  // This should be called if a user chose files or cancel the dialog.
  void DisconnectFileChooser();

 private:
  scoped_refptr<FileChooser> chooser_;
};

class FileChooser : public RefCounted<FileChooser> {
 public:
  CORE_EXPORT static scoped_refptr<FileChooser> Create(
      FileChooserClient*,
      const mojom::blink::FileChooserParams&);
  CORE_EXPORT ~FileChooser();

  LocalFrame* FrameOrNull() const {
    return client_ ? client_->FrameOrNull() : nullptr;
  }
  void DisconnectClient() { client_ = nullptr; }

  const mojom::blink::FileChooserParams& Params() const { return *params_; }

  bool OpenFileChooser(ChromeClientImpl& chrome_client_impl);
  void EnumerateChosenDirectory();

 private:
  FileChooser(FileChooserClient*, const mojom::blink::FileChooserParams&);

  void DidCloseChooser();

  // mojom::blink::FileChooser callback
  void DidChooseFiles(mojom::blink::FileChooserResultPtr result);

  WeakPersistent<FileChooserClient> client_;
  mojom::blink::FileChooserParamsPtr params_;
  Persistent<ChromeClientImpl> chrome_client_impl_;
  mojom::blink::FileChooserPtr file_chooser_;
};

CORE_EXPORT mojom::blink::FileChooserFileInfoPtr
CreateFileChooserFileInfoNative(const String& path,
                                const String& display_name = String());
CORE_EXPORT mojom::blink::FileChooserFileInfoPtr
CreateFileChooserFileInfoFileSystem(const KURL& url,
                                    base::Time modification_time,
                                    int64_t length);

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_CORE_HTML_FORMS_FILE_CHOOSER_H_