Mercurial > gemma
annotate pkg/models/common.go @ 3334:8c96b7379aea
client: fairway availability: made store action work with both types of feature objects
author | Markus Kottlaender <markus@intevation.de> |
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date | Mon, 20 May 2019 17:14:47 +0200 |
parents | 97bba8b51b9c |
children | 8080007d3c06 |
rev | line source |
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1017
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1 // This is Free Software under GNU Affero General Public License v >= 3.0 |
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2 // without warranty, see README.md and license for details. |
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3 // |
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4 // SPDX-License-Identifier: AGPL-3.0-or-later |
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5 // License-Filename: LICENSES/AGPL-3.0.txt |
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6 // |
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7 // Copyright (C) 2018 by via donau |
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH |
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9 // Software engineering by Intevation GmbH |
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10 // |
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11 // Author(s): |
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12 // * Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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13 |
643
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Cross sections: Using the database in the web service.
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14 package models |
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15 |
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16 import ( |
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17 "database/sql/driver" |
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18 "encoding/json" |
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19 "errors" |
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20 "fmt" |
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21 "strings" |
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22 "time" |
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23 |
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24 "gemma.intevation.de/gemma/pkg/common" |
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25 ) |
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26 |
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27 var ( |
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28 errNoString = errors.New("Not a string") |
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29 errNoByteSlice = errors.New("Not a byte slice") |
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30 ) |
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31 |
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32 // WGS84 is the EPSG of the World Geodetic System 1984. |
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33 const WGS84 = 4326 |
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34 |
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35 type ( |
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36 Date struct{ time.Time } |
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37 Time struct{ time.Time } |
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38 |
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39 // Country is a valid country 2 letter code. |
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40 Country string |
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41 // UniqueCountries is a list of unique countries. |
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42 UniqueCountries []Country |
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43 ) |
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44 |
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45 func (d Date) MarshalJSON() ([]byte, error) { |
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46 return json.Marshal(d.Format(common.DateFormat)) |
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47 } |
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48 |
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49 func (d *Date) UnmarshalJSON(data []byte) error { |
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50 var s string |
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51 if err := json.Unmarshal(data, &s); err != nil { |
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52 return err |
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53 } |
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54 d2, err := time.Parse(common.DateFormat, s) |
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55 if err == nil { |
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56 *d = Date{d2} |
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57 } |
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58 return err |
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59 } |
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60 |
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61 func (t Time) MarshalJSON() ([]byte, error) { |
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62 return json.Marshal(t.Format(common.TimeFormat)) |
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63 } |
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64 |
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65 func (t *Time) UnmarshalJSON(data []byte) error { |
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66 var s string |
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67 if err := json.Unmarshal(data, &s); err != nil { |
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68 return err |
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69 } |
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70 t2, err := time.Parse(common.TimeFormat, s) |
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71 if err == nil { |
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72 *t = Time{t2} |
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73 } |
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74 return err |
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75 } |
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76 |
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77 var ( |
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78 validCountries = []string{ |
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79 "AT", "BG", "DE", "HU", "HR", |
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80 "MD", "RO", "RS", "SK", "UA", |
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81 } |
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82 ) |
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83 |
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84 // UnmarshalJSON ensures that the given string forms a valid |
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85 // two letter country code. |
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86 func (c *Country) UnmarshalJSON(data []byte) error { |
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87 var s string |
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88 if err := json.Unmarshal(data, &s); err != nil { |
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89 return err |
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90 } |
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91 u := strings.ToUpper(s) |
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92 for _, v := range validCountries { |
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93 if v == u { |
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94 *c = Country(v) |
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95 return nil |
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96 } |
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97 } |
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98 return fmt.Errorf("'%s' is not a valid country", s) |
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99 } |
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100 |
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101 // Value implements the driver.Valuer interface. |
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102 func (c Country) Value() (driver.Value, error) { |
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103 return string(c), nil |
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104 } |
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105 |
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106 // Scan implements the sql.Scanner interfaces. |
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107 func (c *Country) Scan(src interface{}) (err error) { |
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108 if s, ok := src.(string); ok { |
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109 *c = Country(s) |
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110 } else { |
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111 err = errNoString |
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112 } |
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113 return |
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114 } |
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115 |
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116 func (uc *UniqueCountries) UnmarshalJSON(data []byte) error { |
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117 var countries []Country |
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118 if err := json.Unmarshal(data, &countries); err != nil { |
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119 return err |
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120 } |
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121 unique := map[Country]struct{}{} |
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122 for _, c := range countries { |
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123 if _, found := unique[c]; found { |
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124 return fmt.Errorf("country '%s' is not unique", string(c)) |
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125 } |
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126 unique[c] = struct{}{} |
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127 } |
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128 *uc = countries |
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129 return nil |
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130 } |
2231
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131 |
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132 func (uc UniqueCountries) String() string { |
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133 var b strings.Builder |
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134 for i, c := range uc { |
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135 if i > 0 { |
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136 b.WriteString(", ") |
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137 } |
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138 b.WriteString(string(c)) |
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139 } |
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140 return b.String() |
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141 } |