Mercurial > gemma
annotate controllers/user.go @ 257:dfc2b035e055
Slimming down the signature of the JSONHandler type to
not take the http.ResponseWriter.
Idea of this handler is to simply transform JSON to JSON.
The input is already parsed. The output is generated from
JSONResult. So there is no need to pass the ResponseWriter
to the handler function.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Fri, 27 Jul 2018 13:03:56 +0200 |
parents | de6fdb316b8f |
children | ab9859981ee3 |
rev | line source |
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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 "database/sql/driver" |
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6 "encoding/json" |
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7 "errors" |
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8 "fmt" |
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9 "net/http" |
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10 "regexp" |
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11 "strings" |
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12 |
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13 "github.com/gorilla/mux" |
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14 |
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15 "gemma.intevation.de/gemma/auth" |
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16 ) |
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17 |
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18 type ( |
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19 Email string |
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20 Country string |
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21 Role string |
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22 |
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23 BoundingBox struct { |
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24 X1 float64 `json:"x1"` |
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25 Y1 float64 `json:"y1"` |
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26 X2 float64 `json:"x2"` |
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27 Y2 float64 `json:"y2"` |
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28 } |
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29 |
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30 User struct { |
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31 User string `json:"user"` |
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32 Role Role `json:"role"` |
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33 Password string `json:"password,omitempty"` |
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34 Email Email `json:"email"` |
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35 Country Country `json:"country"` |
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36 Extent *BoundingBox `json:"extent"` |
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37 } |
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38 ) |
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39 |
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40 const ( |
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41 createUserSQL = `SELECT sys_admin.create_user($1, $2, $3, $4, NULL, $5)` |
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42 createUserExtentSQL = `SELECT sys_admin.create_user($1, $2, $3, $4, |
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43 ST_MakeBox2D(ST_Point($5, $6), ST_Point($7, $8)), $9)` |
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44 |
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45 updateUserSQL = `SELECT sys_admin.update_user($1, $2, $3, $4, $5, NULL, $6)` |
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46 updateUserExtentSQL = `SELECT sys_admin.update_user($1, $2, $3, $4, $5, |
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47 ST_MakeBox2D(ST_Point($6, $7), ST_Point($8, $9)), $10)` |
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48 |
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49 deleteUserSQL = `SELECT sys_admin.delete_user($1)` |
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50 |
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51 listUsersSQL = `SELECT |
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52 rolname, |
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53 username, |
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54 country, |
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55 email_address, |
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56 ST_XMin(map_extent), ST_YMin(map_extent), |
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57 ST_XMax(map_extent), ST_YMax(map_extent) |
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58 FROM sys_admin.list_users` |
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59 |
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60 listUserSQL = `SELECT |
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61 rolname, |
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62 country, |
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63 email_address, |
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64 ST_XMin(map_extent), ST_YMin(map_extent), |
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65 ST_XMax(map_extent), ST_YMax(map_extent) |
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66 FROM sys_admin.list_users |
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67 WHERE username = $1` |
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68 ) |
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69 |
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70 var errNoString = errors.New("Not a string") |
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71 |
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72 var ( |
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73 // https://stackoverflow.com/questions/201323/how-to-validate-an-email-address-using-a-regular-expression |
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74 emailRe = regexp.MustCompile( |
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75 `(?:[a-z0-9!#$%&'*+/=?^_` + "`" + |
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76 `{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_` + "`" + |
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77 `{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]` + |
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78 `|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")` + |
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79 `@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?` + |
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80 `|\[(?:(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9]))\.){3}` + |
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81 `(?:(2(5[0-5]|[0-4][0-9])|1[0-9][0-9]|[1-9]?[0-9])|[a-z0-9-]*[a-z0-9]` + |
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82 `:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]` + |
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83 `|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])`) |
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84 errNoEmailAddress = errors.New("Not a valid email address") |
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85 ) |
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86 |
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87 func (e *Email) UnmarshalJSON(data []byte) error { |
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88 var s string |
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89 if err := json.Unmarshal(data, &s); err != nil { |
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90 return err |
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91 } |
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92 if !emailRe.MatchString(s) { |
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93 return errNoEmailAddress |
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94 } |
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95 *e = Email(s) |
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96 return nil |
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97 } |
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98 |
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99 func (e Email) Value() (driver.Value, error) { |
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100 return string(e), nil |
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101 } |
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102 |
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103 func (e *Email) Scan(src interface{}) (err error) { |
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104 if s, ok := src.(string); ok { |
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105 *e = Email(s) |
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106 } else { |
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107 err = errNoString |
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108 } |
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109 return |
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110 } |
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111 |
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112 var ( |
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113 validCountries = []string{ |
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114 "AT", "BG", "DE", "HU", "HR", |
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115 "MD", "RO", "RS", "SK", "UA", |
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116 } |
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117 errNoValidCountry = errors.New("Not a valid country") |
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118 ) |
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119 |
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120 func (c *Country) UnmarshalJSON(data []byte) error { |
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121 var s string |
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122 if err := json.Unmarshal(data, &s); err != nil { |
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123 return err |
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124 } |
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125 s = strings.ToUpper(s) |
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126 for _, v := range validCountries { |
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127 if v == s { |
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128 *c = Country(v) |
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129 return nil |
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130 } |
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131 } |
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132 return errNoValidCountry |
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133 } |
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134 |
243
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135 func (c Country) Value() (driver.Value, error) { |
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136 return string(c), nil |
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137 } |
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138 |
250
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139 func (c *Country) Scan(src interface{}) (err error) { |
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140 if s, ok := src.(string); ok { |
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141 *c = Country(s) |
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142 } else { |
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143 err = errNoString |
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144 } |
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145 return |
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146 } |
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147 |
189
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148 var ( |
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149 validRoles = []string{ |
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150 "waterway_user", |
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151 "waterway_admin", |
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152 "sys_admin", |
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153 } |
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154 errNoValidRole = errors.New("Not a valid role") |
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155 ) |
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156 |
243
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157 func (r Role) Value() (driver.Value, error) { |
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158 return string(r), nil |
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159 } |
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160 |
250
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161 func (r *Role) Scan(src interface{}) (err error) { |
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162 if s, ok := src.(string); ok { |
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163 *r = Role(s) |
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164 } else { |
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165 err = errNoString |
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166 } |
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167 return |
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168 } |
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169 |
189
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170 func (r *Role) UnmarshalJSON(data []byte) error { |
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171 var s string |
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172 if err := json.Unmarshal(data, &s); err != nil { |
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173 return err |
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174 } |
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175 s = strings.ToLower(s) |
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176 for _, v := range validRoles { |
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177 if v == s { |
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178 *r = Role(v) |
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179 return nil |
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180 } |
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181 } |
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182 return errNoValidRole |
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183 } |
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184 |
240
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185 func deleteUser( |
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186 input interface{}, req *http.Request, |
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187 db *sql.DB, |
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188 ) (jr JSONResult, err error) { |
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189 |
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190 user := mux.Vars(req)["user"] |
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191 if user == "" { |
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192 err = JSONError{http.StatusBadRequest, "error: user empty"} |
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193 return |
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194 } |
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195 |
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196 session, _ := auth.GetSession(req) |
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197 if session.User == user { |
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198 err = JSONError{http.StatusBadRequest, "error: cannot delete yourself"} |
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199 return |
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200 } |
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201 |
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202 if _, err = db.Exec(deleteUserSQL, user); err != nil { |
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203 return |
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204 } |
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205 |
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206 // Running in a go routine should not be necessary. |
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207 go func() { auth.ConnPool.Logout(user) }() |
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208 |
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209 jr = JSONResult{Code: http.StatusNoContent} |
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210 return |
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211 } |
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212 |
237
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213 func updateUser( |
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214 input interface{}, req *http.Request, |
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215 db *sql.DB, |
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216 ) (jr JSONResult, err error) { |
235
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217 |
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218 user := mux.Vars(req)["user"] |
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219 if user == "" { |
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220 err = JSONError{http.StatusBadRequest, "error: user empty"} |
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221 return |
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222 } |
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223 |
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224 newUser := input.(*User) |
235
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225 |
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226 if newUser.Extent == nil { |
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227 _, err = db.Exec( |
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228 updateUserSQL, |
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229 user, |
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230 newUser.Role, |
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231 newUser.User, |
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232 newUser.Password, |
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233 newUser.Country, |
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234 newUser.Email, |
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235 ) |
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236 } else { |
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237 _, err = db.Exec( |
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238 updateUserExtentSQL, |
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239 user, |
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240 newUser.Role, |
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241 newUser.User, |
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242 newUser.Password, |
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243 newUser.Country, |
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244 newUser.Extent.X1, newUser.Extent.Y1, |
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245 newUser.Extent.X2, newUser.Extent.Y2, |
243
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246 newUser.Email, |
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247 ) |
235
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248 } |
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249 |
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250 if err != nil { |
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251 return |
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252 } |
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253 |
237
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254 jr = JSONResult{ |
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255 Code: http.StatusCreated, |
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256 Result: struct { |
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257 Result string `json:"result"` |
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258 }{ |
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259 Result: "success", |
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260 }, |
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261 } |
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262 return |
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263 } |
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264 |
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265 func createUser( |
257
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266 input interface{}, req *http.Request, |
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267 db *sql.DB, |
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268 ) (jr JSONResult, err error) { |
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269 |
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270 user := input.(*User) |
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271 |
237
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272 if user.Extent == nil { |
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273 _, err = db.Exec( |
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274 createUserSQL, |
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275 user.Role, |
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276 user.User, |
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277 user.Password, |
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278 user.Country, |
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279 user.Email, |
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280 ) |
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281 } else { |
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282 _, err = db.Exec( |
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283 createUserExtentSQL, |
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284 user.Role, |
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285 user.User, |
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286 user.Password, |
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287 user.Country, |
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288 user.Extent.X1, user.Extent.Y1, |
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289 user.Extent.X2, user.Extent.Y2, |
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290 user.Email, |
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291 ) |
186
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292 } |
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293 |
187
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294 if err != nil { |
237
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295 return |
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296 } |
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297 |
237
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298 jr = JSONResult{ |
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299 Code: http.StatusCreated, |
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300 Result: struct { |
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301 Result string `json:"result"` |
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302 }{ |
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303 Result: "success", |
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304 }, |
186
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305 } |
237
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306 return |
186
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307 } |
250
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308 |
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309 func listUsers( |
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310 input interface{}, req *http.Request, |
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311 db *sql.DB, |
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312 ) (jr JSONResult, err error) { |
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313 |
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314 var rows *sql.Rows |
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315 |
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316 rows, err = db.Query(listUsersSQL) |
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317 if err != nil { |
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318 return |
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319 } |
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320 defer rows.Close() |
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321 |
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322 var users []*User |
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323 |
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324 for rows.Next() { |
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325 user := &User{Extent: &BoundingBox{}} |
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326 if err = rows.Scan( |
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327 &user.Role, |
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328 &user.User, |
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329 &user.Country, |
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330 &user.Email, |
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331 &user.Extent.X1, &user.Extent.Y1, |
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332 &user.Extent.X2, &user.Extent.Y2, |
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333 ); err != nil { |
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334 return |
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335 } |
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336 users = append(users, user) |
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337 } |
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338 |
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339 jr = JSONResult{ |
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340 Result: struct { |
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341 Users []*User `json:"users"` |
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342 }{ |
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343 Users: users, |
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344 }, |
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345 } |
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346 return |
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347 } |
254
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348 |
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349 func listUser( |
257
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350 input interface{}, req *http.Request, |
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351 db *sql.DB, |
254
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352 ) (jr JSONResult, err error) { |
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353 |
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354 user := mux.Vars(req)["user"] |
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355 if user == "" { |
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356 err = JSONError{http.StatusBadRequest, "error: user empty"} |
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357 return |
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358 } |
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359 |
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360 result := &User{ |
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361 User: user, |
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362 Extent: &BoundingBox{}, |
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363 } |
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364 |
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365 err = db.QueryRow(listUserSQL, user).Scan( |
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366 &result.Role, |
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367 &result.Country, |
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368 &result.Email, |
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369 &result.Extent.X1, &result.Extent.Y1, |
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370 &result.Extent.X2, &result.Extent.Y2, |
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371 ) |
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372 |
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373 switch { |
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374 case err == sql.ErrNoRows: |
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375 err = JSONError{ |
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376 Code: http.StatusNotFound, |
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377 Message: fmt.Sprintf("Cannot find user %s.", user), |
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378 } |
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379 return |
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380 case err != nil: |
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381 return |
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382 } |
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383 |
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384 jr.Result = result |
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385 return |
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386 } |