Mercurial > gemma

annotate controllers/user.go @ 237:3771788d3dae

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Reduce boilerplate code when writing JSON parsing/generating endpoints.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 26 Jul 2018 17:07:03 +0200
parents 7d1f0ffdfa41
children 9012e4045da4
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rev   line source
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63dd5216eee4 Refactored gemma server to be more REST-like.
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1 package controllers
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2
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3 import (
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4 "database/sql"
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5 "encoding/json"
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6 "errors"
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7 "net/http"
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8 "regexp"
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9 "strings"
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10
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11 "github.com/gorilla/mux"
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12 )
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13
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14 type (
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15 Email string
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16 Country string
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17 Role string
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18
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19 BoundingBox struct {
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20 X1 float64 `json:"x1"`
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21 Y1 float64 `json:"y1"`
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22 X2 float64 `json:"x2"`
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23 Y2 float64 `json:"y2"`
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24 }
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25
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26 User struct {
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27 User string `json:"user"`
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28 Role Role `json:"role"`
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29 Password string `json:"password"`
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30 Email Email `json:"email"`
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31 Country Country `json:"country"`
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32 Extent *BoundingBox `json:"extent"`
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33 }
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34 )
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35
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36 const (
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37 createUserSQL = `SELECT sys_admin.create_user($1, $2, $3, $4, NULL, $5)`
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38 createUserExtentSQL = `SELECT sys_admin.create_user($1, $2, $3, $4,
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39 ST_MakeBox2D(ST_Point($5, $6), ST_Point($7, $8)), $9)`
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40
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41 updateUserSQL = `SELECT sys_admin.update_user($1, $2, $3, $4, $5, NULL, $6)`
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42 updateUserExtentSQL = `SELECT sys_admin.update_user($1, $2, $3, $4, $5,
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43 ST_MakeBox2D(ST_Point($6, $7), ST_Point($8, $9)), $10)`
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44 )
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45
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46 var (
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47 // https://stackoverflow.com/questions/201323/how-to-validate-an-email-address-using-a-regular-expression
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48 emailRe = regexp.MustCompile(
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49 `(?:[a-z0-9!#$%&'*+/=?^_` + "`" +
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50 `{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_` + "`" +
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51 `{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]` +
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52 `|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")` +
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53 `@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?` +
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54 `|\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\.){3}` +
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55 `(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]` +
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56 `:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]` +
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57 `|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])`)
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58 errNoEmailAddress = errors.New("Not a valid email address")
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59 )
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60
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61 func (e *Email) UnmarshalJSON(data []byte) error {
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62 var s string
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63 if err := json.Unmarshal(data, &s); err != nil {
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64 return err
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65 }
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66 if !emailRe.MatchString(s) {
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67 return errNoEmailAddress
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68 }
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69 *e = Email(s)
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70 return nil
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71 }
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72
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73 var (
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74 validCountries = []string{
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75 "AT", "BG", "DE", "HU", "HR",
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76 "MD", "RO", "RS", "SK", "UA",
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77 }
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78 errNoValidCountry = errors.New("Not a valid country")
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79 )
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80
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81 func (c *Country) UnmarshalJSON(data []byte) error {
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82 var s string
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83 if err := json.Unmarshal(data, &s); err != nil {
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84 return err
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85 }
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86 s = strings.ToUpper(s)
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87 for _, v := range validCountries {
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88 if v == s {
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89 *c = Country(v)
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90 return nil
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91 }
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92 }
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93 return errNoValidCountry
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94 }
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95
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96 var (
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97 validRoles = []string{
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98 "waterway_user",
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99 "waterway_admin",
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100 "sys_admin",
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101 }
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102 errNoValidRole = errors.New("Not a valid role")
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103 )
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104
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105 func (r *Role) UnmarshalJSON(data []byte) error {
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106 var s string
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107 if err := json.Unmarshal(data, &s); err != nil {
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108 return err
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109 }
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110 s = strings.ToLower(s)
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111 for _, v := range validRoles {
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112 if v == s {
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113 *r = Role(v)
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114 return nil
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115 }
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116 }
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117 return errNoValidRole
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118 }
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119
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120 func updateUser(
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121 rw http.ResponseWriter, req *http.Request,
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122 input interface{},
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123 db *sql.DB,
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124 ) (jr JSONResult, err error) {
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125
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126 user := mux.Vars(req)["user"]
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127 if user == "" {
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128 err = JSONError{http.StatusBadRequest, "error: user empty"}
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129 return
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130 }
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131
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132 newUser := input.(*User)
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133
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134 if newUser.Extent == nil {
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135 _, err = db.Exec(
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136 updateUserSQL,
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137 user,
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138 string(newUser.Role),
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139 newUser.User,
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140 newUser.Password,
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141 string(newUser.Country),
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142 string(newUser.Email),
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143 )
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144 } else {
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145 _, err = db.Exec(
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146 updateUserExtentSQL,
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147 user,
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148 string(newUser.Role),
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149 newUser.User,
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150 newUser.Password,
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151 string(newUser.Country),
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152 newUser.Extent.X1, newUser.Extent.Y1,
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153 newUser.Extent.X2, newUser.Extent.Y2,
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154 string(newUser.Email),
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155 )
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156 }
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157
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158 if err != nil {
186
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159 return
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160 }
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161
237
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162 jr = JSONResult{
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163 Code: http.StatusCreated,
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164 Result: struct {
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165 Result string `json:"result"`
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166 }{
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167 Result: "success",
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168 },
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169 }
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170 return
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171 }
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172
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173 func createUser(
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174 rw http.ResponseWriter, req *http.Request,
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175 input interface{},
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176 db *sql.DB,
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177 ) (jr JSONResult, err error) {
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178
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179 user := input.(*User)
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180
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181 if user.Extent == nil {
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182 _, err = db.Exec(
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183 createUserSQL,
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184 string(user.Role),
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185 user.User,
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186 user.Password,
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187 string(user.Country),
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188 string(user.Email),
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189 )
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190 } else {
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191 _, err = db.Exec(
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192 createUserExtentSQL,
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193 string(user.Role),
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194 user.User,
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195 user.Password,
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196 string(user.Country),
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197 user.Extent.X1, user.Extent.Y1,
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198 user.Extent.X2, user.Extent.Y2,
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199 string(user.Email),
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200 )
186
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201 }
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202
187
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203 if err != nil {
237
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204 return
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205 }
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206
237
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207 jr = JSONResult{
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208 Code: http.StatusCreated,
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209 Result: struct {
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210 Result string `json:"result"`
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211 }{
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212 Result: "success",
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213 },
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214 }
237
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215 return
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216 }