1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_BASE_SCREEN_HANDLER_UTILS_H_
6#define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_BASE_SCREEN_HANDLER_UTILS_H_
7
8#include <cstddef>
9#include <string>
10
11#include "base/callback.h"
12#include "base/logging.h"
13#include "base/strings/string16.h"
14#include "base/values.h"
15
16namespace chromeos {
17
18typedef std::vector<std::string> StringList;
19typedef std::vector<base::string16> String16List;
20
21template<typename T>
22struct UnwrapConstRef {
23  typedef T Type;
24};
25
26template<typename T>
27struct UnwrapConstRef<const T&> {
28  typedef T Type;
29};
30
31bool ParseValue(const base::Value* value, bool* out_value);
32bool ParseValue(const base::Value* value, int* out_value);
33bool ParseValue(const base::Value* value, double* out_value);
34bool ParseValue(const base::Value* value, std::string* out_value);
35bool ParseValue(const base::Value* value, base::string16* out_value);
36bool ParseValue(const base::Value* value,
37                const base::DictionaryValue** out_value);
38bool ParseValue(const base::Value* value, StringList* out_value);
39bool ParseValue(const base::Value* value, String16List* out_value);
40
41template<typename T>
42inline bool GetArg(const base::ListValue* args, size_t index, T* out_value) {
43  const base::Value* value;
44  if (!args->Get(index, &value))
45    return false;
46  return ParseValue(value, out_value);
47}
48
49base::FundamentalValue MakeValue(bool v);
50base::FundamentalValue MakeValue(int v);
51base::FundamentalValue MakeValue(double v);
52base::StringValue MakeValue(const std::string& v);
53base::StringValue MakeValue(const base::string16& v);
54
55template<typename T>
56inline const T& MakeValue(const T& v) {
57  return v;
58}
59
60void CallbackWrapper0(base::Callback<void()> callback,
61                      const base::ListValue* args);
62
63template<typename A1>
64void CallbackWrapper1(base::Callback<void(A1)> callback,
65                      const base::ListValue* args) {
66  DCHECK(args);
67  DCHECK_EQ(1u, args->GetSize());
68  typename UnwrapConstRef<A1>::Type arg1;
69  if (!GetArg(args, 0, &arg1)) {
70    NOTREACHED();
71    return;
72  }
73  callback.Run(arg1);
74}
75
76template<typename A1, typename A2>
77void CallbackWrapper2(base::Callback<void(A1, A2)> callback,
78                      const base::ListValue* args) {
79  DCHECK(args);
80  DCHECK_EQ(2u, args->GetSize());
81  typename UnwrapConstRef<A1>::Type arg1;
82  typename UnwrapConstRef<A2>::Type arg2;
83  if (!GetArg(args, 0, &arg1) || !GetArg(args, 1, &arg2)) {
84    NOTREACHED();
85    return;
86  }
87  callback.Run(arg1, arg2);
88}
89
90template<typename A1, typename A2, typename A3>
91void CallbackWrapper3(base::Callback<void(A1, A2, A3)> callback,
92                      const base::ListValue* args) {
93  DCHECK(args);
94  DCHECK_EQ(3u, args->GetSize());
95  typename UnwrapConstRef<A1>::Type arg1;
96  typename UnwrapConstRef<A2>::Type arg2;
97  typename UnwrapConstRef<A3>::Type arg3;
98  if (!GetArg(args, 0, &arg1) ||
99      !GetArg(args, 1, &arg2) ||
100      !GetArg(args, 2, &arg3)) {
101    NOTREACHED();
102    return;
103  }
104  callback.Run(arg1, arg2, arg3);
105}
106
107template<typename A1, typename A2, typename A3, typename A4>
108void CallbackWrapper4(base::Callback<void(A1, A2, A3, A4)> callback,
109                      const base::ListValue* args) {
110  DCHECK(args);
111  DCHECK_EQ(4u, args->GetSize());
112  typename UnwrapConstRef<A1>::Type arg1;
113  typename UnwrapConstRef<A2>::Type arg2;
114  typename UnwrapConstRef<A3>::Type arg3;
115  typename UnwrapConstRef<A4>::Type arg4;
116  if (!GetArg(args, 0, &arg1) ||
117      !GetArg(args, 1, &arg2) ||
118      !GetArg(args, 2, &arg3) ||
119      !GetArg(args, 3, &arg4)) {
120    NOTREACHED();
121    return;
122  }
123  callback.Run(arg1, arg2, arg3, arg4);
124}
125
126}  // namespace chromeos
127
128#endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_BASE_SCREEN_HANDLER_UTILS_H_
129