]>
Commit | Line | Data |
---|---|---|
1 | package api | |
2 | ||
3 | import ( | |
4 | "net/http" | |
5 | "unicode" | |
6 | ||
7 | "github.com/gin-gonic/gin" | |
8 | ) | |
9 | ||
10 | var CONFIG Config | |
11 | ||
12 | type Config struct { | |
13 | JwtSecret string `toml:"jwt_secret"` | |
14 | PasswordResetSecret string `toml:"password_reset_secret"` | |
15 | FreeSMSUser string `toml:"free_sms_user"` | |
16 | FreeSMSPass string `toml:"free_sms_pass"` | |
17 | } | |
18 | ||
19 | func SetConfig(config Config) { | |
20 | CONFIG = config | |
21 | ||
22 | JWT_SECRET = []byte(config.JwtSecret) | |
23 | PASSWORD_RESET_SECRET = []byte(config.PasswordResetSecret) | |
24 | } | |
25 | ||
26 | type Error struct { | |
27 | Code ErrorCode | |
28 | UserMessage string | |
29 | err error | |
30 | } | |
31 | ||
32 | func (e Error) Err() error { | |
33 | if e.err != nil { | |
34 | return e | |
35 | } | |
36 | ||
37 | return nil | |
38 | } | |
39 | ||
40 | func (e Error) Error() string { | |
41 | if e.err != nil { | |
42 | return e.err.Error() | |
43 | } | |
44 | ||
45 | return "" | |
46 | } | |
47 | ||
48 | func NewInternalError(err error) *Error { | |
49 | return &Error{InternalError, "internal error", err} | |
50 | } | |
51 | ||
52 | func ToSnake(in string) string { | |
53 | runes := []rune(in) | |
54 | length := len(runes) | |
55 | ||
56 | var out []rune | |
57 | for i := 0; i < length; i++ { | |
58 | if i > 0 && unicode.IsUpper(runes[i]) && ((i+1 < length && unicode.IsLower(runes[i+1])) || unicode.IsLower(runes[i-1])) { | |
59 | out = append(out, '_') | |
60 | } | |
61 | out = append(out, unicode.ToLower(runes[i])) | |
62 | } | |
63 | ||
64 | return string(out) | |
65 | } | |
66 | ||
67 | type Response struct { | |
68 | StatusCode Status `json:"-"` | |
69 | ErrorCode ErrorCode `json:"-"` | |
70 | ||
71 | Status string `json:"status"` | |
72 | Code string `json:"code,omitempty"` | |
73 | Response interface{} `json:"response,omitempty"` | |
74 | Message string `json:"message,omitempty"` | |
75 | } | |
76 | ||
77 | func (r Response) populateStatus() Response { | |
78 | r.Status = ToSnake(r.StatusCode.String()) | |
79 | ||
80 | if r.ErrorCode != 0 { | |
81 | r.Code = ToSnake(r.ErrorCode.String()) | |
82 | } | |
83 | ||
84 | return r | |
85 | } | |
86 | ||
87 | func ErrorResponse(code ErrorCode, message string) Response { | |
88 | return Response{ | |
89 | StatusCode: NOK, | |
90 | ErrorCode: code, | |
91 | Message: message, | |
92 | } | |
93 | } | |
94 | ||
95 | func SuccessResponse(data interface{}) Response { | |
96 | return Response{ | |
97 | StatusCode: OK, | |
98 | Response: data, | |
99 | } | |
100 | } | |
101 | ||
102 | func WriteJsonResponse(response Response, c *gin.Context) { | |
103 | response = response.populateStatus() | |
104 | ||
105 | c.JSON(StatusToHttpCode(response.StatusCode, response.ErrorCode), response) | |
106 | } | |
107 | ||
108 | func WriteBinary(contentType string, b []byte, c *gin.Context) { | |
109 | c.Data(http.StatusOK, contentType, b) | |
110 | } | |
111 | ||
112 | type Middleware func(*gin.Context) *Error | |
113 | ||
114 | func M(handler Middleware) gin.HandlerFunc { | |
115 | return func(c *gin.Context) { | |
116 | err := handler(c) | |
117 | ||
118 | if err != nil { | |
119 | WriteJsonResponse(ErrorResponse(err.Code, err.UserMessage), c) | |
120 | c.Error(err) | |
121 | c.Abort() | |
122 | } else { | |
123 | c.Next() | |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | type Query interface { | |
129 | ValidateParams() *Error | |
130 | Run() (interface{}, *Error) | |
131 | } | |
132 | ||
133 | func RunQuery(query Query, c *gin.Context) { | |
134 | if err := query.ValidateParams(); err != nil { | |
135 | WriteJsonResponse(ErrorResponse(err.Code, err.UserMessage), c) | |
136 | c.Error(err) | |
137 | return | |
138 | } | |
139 | ||
140 | if out, err := query.Run(); err != nil { | |
141 | WriteJsonResponse(ErrorResponse(err.Code, err.UserMessage), c) | |
142 | c.Error(err) | |
143 | } else { | |
144 | WriteJsonResponse(SuccessResponse(out), c) | |
145 | } | |
146 | } |