// Copyright (c) 2012 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.

#ifndef COMPONENTS_WEBDATA_COMMON_WEB_DATA_RESULTS_H_
#define COMPONENTS_WEBDATA_COMMON_WEB_DATA_RESULTS_H_

#include <stdint.h>

#include "base/callback.h"
#include "base/macros.h"
#include "build/build_config.h"
#include "components/webdata/common/webdata_export.h"

class WDTypedResult;

//
// Result types for WebDataService.
//
typedef enum {
  BOOL_RESULT = 1,              // WDResult<bool>
  KEYWORDS_RESULT,              // WDResult<WDKeywordsResult>
  INT64_RESULT,                 // WDResult<int64_t>
#if defined(OS_WIN)             //
  PASSWORD_IE7_RESULT,          // WDResult<IE7PasswordInfo>
#endif                          //
  WEB_APP_IMAGES,               // WDResult<WDAppImagesResult>
  TOKEN_RESULT,                 // WDResult<std::vector<std::string>>
  AUTOFILL_VALUE_RESULT,        // WDResult<std::vector<base::string16>>
  AUTOFILL_CHANGES,             // WDResult<std::vector<AutofillChange>>
  AUTOFILL_PROFILE_RESULT,      // WDResult<AutofillProfile>
  AUTOFILL_PROFILES_RESULT,     // WDResult<std::vector<
                                //     std::unique_ptr<AutofillProfile>>>
  AUTOFILL_CREDITCARD_RESULT,   // WDResult<CreditCard>
  AUTOFILL_CREDITCARDS_RESULT,  // WDResult<std::vector<
                                //     std::unique_ptr<CreditCard>>>
} WDResultType;

//
// The top level class for a result.
//
class WEBDATA_EXPORT WDTypedResult {
 public:
  virtual ~WDTypedResult() {
  }

  // Return the result type.
  WDResultType GetType() const {
    return type_;
  }

 protected:
  explicit WDTypedResult(WDResultType type)
    : type_(type) {
  }

 private:
  WDResultType type_;
  DISALLOW_COPY_AND_ASSIGN(WDTypedResult);
};

// A result containing one specific pointer or literal value.
template <class T> class WDResult : public WDTypedResult {
 public:
  WDResult(WDResultType type, const T& v) : WDTypedResult(type), value_(v) {}
  WDResult(WDResultType type, T&& v)
      : WDTypedResult(type), value_(std::move(v)) {}

  ~WDResult() override {}

  // Return a single value result.
  const T& GetValue() const { return value_; }
  T GetValue() { return std::move(value_); }

 private:
  T value_;

  DISALLOW_COPY_AND_ASSIGN(WDResult);
};

#endif  // COMPONENTS_WEBDATA_COMMON_WEB_DATA_RESULTS_H_