Mercurial > gemma

annotate pkg/models/intservices.go @ 877:254cd247826d geo-style

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The XSLT stuff is not need (Puh!).
author Sascha L. Teichmann <teichmann@intevation.de>
date Sun, 30 Sep 2018 20:09:02 +0200
parents 8b9bd9ccdd93
children 876d1f5433be
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 package models
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2
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3 import (
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4 "context"
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5 "database/sql"
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6 "log"
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7 "net/http"
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8 "sync"
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9
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10 "gemma.intevation.de/gemma/pkg/auth"
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11 "gemma.intevation.de/gemma/pkg/config"
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12 )
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13
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14 type IntEntry struct {
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15 Name string `json:"name"`
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16 Style sql.NullString `json:"-"` // This should be done separately.
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17 WMS bool `json:"wms"`
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18 WFS bool `json:"wfs"`
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19 }
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20
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21 type IntServices struct {
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22 entries []IntEntry
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23 mu sync.Mutex
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24 }
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25
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26 const (
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27 selectPublishedServices = `SELECT relname, style, as_wms, as_wfs
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28 FROM sys_admin.published_services JOIN pg_class ON name = oid ORDER by relname`
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29
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30 updateStyleSQL = `
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31 UPDATE sys_admin.published_services
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32 SET style = $1::bytea
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33 WHERE name IN (SELECT oid FROM pg_class WHERE relname = $2)`
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34 )
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35
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36 var InternalServices = &IntServices{}
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37
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38 func UpdateInternalStyle(req *http.Request, name, style string) error {
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39 return auth.RunAsSessionUser(req, func(conn *sql.Conn) error {
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40 _, err := conn.ExecContext(
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41 req.Context(), updateStyleSQL,
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42 style, name)
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43 if err == nil {
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44 InternalServices.Invalidate()
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45 }
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46 return err
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47 })
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48 }
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49
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50 func (ps *IntServices) Find(name string) (string, bool) {
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51 ps.mu.Lock()
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52 defer ps.mu.Unlock()
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53
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54 if ps.entries == nil {
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55 if err := ps.load(); err != nil {
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56 log.Printf("error: %v\n", err)
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57 return "", false
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58 }
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59 }
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60
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61 if ps.has(name) {
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62 return config.GeoServerURL() + "/" + name, true
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63 }
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64 return "", false
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65 }
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66
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67 func (ps *IntServices) has(service string) bool {
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68 var check func(*IntEntry) bool
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69 switch service {
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70 case "wms":
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71 check = func(e *IntEntry) bool { return e.WMS }
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72 case "wfs":
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73 check = func(e *IntEntry) bool { return e.WFS }
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74 default:
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75 return false
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76 }
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77 for i := range ps.entries {
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78 if check(&ps.entries[i]) {
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79 return true
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80 }
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81 }
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82 return false
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83 }
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84
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85 func (ps *IntServices) load() error {
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86 // make empty slice to prevent retry if slice is empty.
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87 ps.entries = []IntEntry{}
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88 return auth.RunAs("sys_admin", context.Background(),
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89 func(conn *sql.Conn) error {
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90 rows, err := conn.QueryContext(
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91 context.Background(), selectPublishedServices)
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92 if err != nil {
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93 return err
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94 }
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95 defer rows.Close()
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96 for rows.Next() {
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97 var entry IntEntry
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98 if err := rows.Scan(
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99 &entry.Name, &entry.Style,
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100 &entry.WMS, &entry.WFS,
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101 ); err != nil {
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102 return err
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103 }
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104 ps.entries = append(ps.entries, entry)
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105 }
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106 return rows.Err()
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107 })
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108 }
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109
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110 func (ps *IntServices) Invalidate() {
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111 ps.mu.Lock()
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112 ps.entries = nil
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113 ps.mu.Unlock()
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114 }
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115
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116 func InternalAll(IntEntry) bool { return true }
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117 func IntWMS(entry IntEntry) bool { return entry.WMS }
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118 func IntWFS(entry IntEntry) bool { return entry.WFS }
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119
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120 func IntByName(name string) func(IntEntry) bool {
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121 return func(entry IntEntry) bool { return entry.Name == name }
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122 }
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123
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124 func IntAnd(a, b func(IntEntry) bool) func(IntEntry) bool {
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125 return func(entry IntEntry) bool { return a(entry) && b(entry) }
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126 }
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127
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128 func IntWithStyle(entry IntEntry) bool {
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129 return entry.Style.Valid
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130 }
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131
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132 func (ps *IntServices) Filter(accept func(IntEntry) bool) []IntEntry {
444
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133 ps.mu.Lock()
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134 defer ps.mu.Unlock()
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135 if ps.entries == nil {
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136 if err := ps.load(); err != nil {
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137 log.Printf("error: %v\n", err)
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138 return nil
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139 }
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140 }
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141 pe := make([]IntEntry, 0, len(ps.entries))
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142 for _, e := range ps.entries {
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143 if accept(e) {
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144 pe = append(pe, e)
444
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145 }
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146 }
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147
445
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148 return pe
444
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149 }