Mercurial > gemma
annotate pkg/models/intservices.go @ 913:876d1f5433be geo-style
Started with direct applying style after modification via controller. WIP.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Tue, 02 Oct 2018 23:29:55 +0200 |
parents | 254cd247826d |
children | 2ebf677fc2e1 |
rev | line source |
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Moved some models used in controllers to to model package because they may be needed elsewhere (e.g. GeoServer config).
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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(accept ...func(IntEntry) bool) func(IntEntry) bool { |
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125 return func(entry IntEntry) bool { |
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126 for _, a := range accept { |
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127 if !a(entry) { |
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128 return false |
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129 } |
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130 } |
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131 return true |
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132 } |
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133 } |
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134 |
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135 func IntWithStyle(entry IntEntry) bool { |
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136 return entry.Style.Valid |
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137 } |
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138 |
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139 func (ps *IntServices) Filter(accept func(IntEntry) bool) []IntEntry { |
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140 ps.mu.Lock() |
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141 defer ps.mu.Unlock() |
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142 if ps.entries == nil { |
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143 if err := ps.load(); err != nil { |
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144 log.Printf("error: %v\n", err) |
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145 return nil |
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146 } |
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147 } |
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148 pe := make([]IntEntry, 0, len(ps.entries)) |
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149 for _, e := range ps.entries { |
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150 if accept(e) { |
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151 pe = append(pe, e) |
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152 } |
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153 } |
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154 |
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155 return pe |
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156 } |