Mercurial > gemma
annotate pkg/imports/wx.go @ 2295:b6cd295bf75d
import_schedule: default for sort-by: 'hydro_scamin'
author | Thomas Junk <thomas.junk@intevation.de> |
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date | Mon, 18 Feb 2019 11:16:13 +0100 |
parents | 7c83b5277c1c |
children | 02505fcff63c |
rev | line source |
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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 |
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14 package imports |
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15 |
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16 import ( |
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17 "context" |
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18 "database/sql" |
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19 "encoding/json" |
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20 "errors" |
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21 "fmt" |
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22 "io" |
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23 "time" |
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24 |
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25 "gemma.intevation.de/gemma/pkg/wfs" |
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26 ) |
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27 |
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28 // WaterwayAxis is an import job to import |
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29 // the waterway axes in form of line string geometries |
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30 // and attribute data from a WFS service. |
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31 type WaterwayAxis struct { |
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32 // URL the GetCapabilities URL of the WFS service. |
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33 URL string `json:"url"` |
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34 // FeatureType selects the feature type of the WFS service. |
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35 FeatureType string `json:"feature-type"` |
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36 // SortBy works around misconfigured services to |
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37 // establish a sort order to get the features. |
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38 SortBy string `json:"sort-by"` |
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39 } |
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40 |
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41 // WXJobKind is the import queue type identifier. |
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42 const WXJobKind JobKind = "wx" |
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43 |
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44 type wxJobCreator struct{} |
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45 |
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46 func init() { |
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47 RegisterJobCreator(WXJobKind, wxJobCreator{}) |
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48 } |
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49 |
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50 func (wxJobCreator) Description() string { return "waterway axis" } |
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51 |
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52 func (wxJobCreator) AutoAccept() bool { return true } |
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53 |
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54 func (wxJobCreator) Create() Job { return new(WaterwayAxis) } |
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55 |
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56 func (wxJobCreator) Depends() []string { |
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57 return []string{ |
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58 "waterway_axis", |
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59 } |
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60 } |
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61 |
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62 // StageDone is a NOP for waterway axis imports. |
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63 func (wxJobCreator) StageDone(context.Context, *sql.Tx, int64) error { |
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64 return nil |
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65 } |
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66 |
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67 // CleanUp for waterway axis imports is a NOP. |
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68 func (*WaterwayAxis) CleanUp() error { return nil } |
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69 |
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70 type waterwayAxisProperties struct { |
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71 ObjNam string `json:"hydro_objnam"` |
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72 NObjNnm *string `json:"hydro_nobjnm"` |
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73 } |
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74 |
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75 const ( |
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76 deleteWaterwayAxisSQL = ` |
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77 WITH resp AS ( |
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78 SELECT best_utm(area::geometry) AS t, |
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79 ST_Transform(area::geometry, best_utm(area::geometry)) AS a |
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80 FROM users.responsibility_areas |
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81 WHERE country = users.current_user_country() |
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82 ) |
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83 DELETE FROM waterway.waterway_axis |
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84 WHERE ST_Covers( |
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85 (SELECT a FROM resp), |
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86 ST_Transform(wtwaxs::geometry, (SELECT t FROM resp))) |
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87 ` |
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88 |
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89 insertWaterwayAxisSQL = ` |
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90 WITH resp AS ( |
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91 SELECT best_utm(area::geometry) AS t, |
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92 ST_Transform(area::geometry, best_utm(area::geometry)) AS a |
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93 FROM users.responsibility_areas |
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94 WHERE country = users.current_user_country() |
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95 ) |
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96 INSERT INTO waterway.waterway_axis (wtwaxs, objnam, nobjnam) |
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97 SELECT ST_Transform(clipped.geom, 4326)::geography, $3, $4 FROM ( |
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98 SELECT (ST_Dump( |
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99 ST_Intersection( |
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100 (SELECT a FROM resp), |
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101 ST_Transform( |
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102 ST_GeomFromWKB($1, $2::integer), |
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103 (SELECT t FROM resp) |
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104 ) |
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105 ) |
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106 )).geom AS geom |
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107 ) AS clipped |
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108 WHERE clipped.geom IS NOT NULL |
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109 ` |
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110 ) |
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111 |
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112 // Do executes the actual waterway axis import. |
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113 func (wx *WaterwayAxis) Do( |
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114 ctx context.Context, |
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115 importID int64, |
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116 conn *sql.Conn, |
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117 feedback Feedback, |
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118 ) (interface{}, error) { |
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119 |
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120 start := time.Now() |
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121 |
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122 feedback.Info("Import waterway axis") |
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123 |
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124 feedback.Info("Loading capabilities from %s", wx.URL) |
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125 caps, err := wfs.GetCapabilities(wx.URL) |
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126 if err != nil { |
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127 feedback.Error("Loading capabilities failed: %v", err) |
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128 return nil, err |
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129 } |
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130 |
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131 ft := caps.FindFeatureType(wx.FeatureType) |
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132 if ft == nil { |
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133 return nil, fmt.Errorf("Unknown feature type '%s'", wx.FeatureType) |
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134 } |
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135 |
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136 feedback.Info("Found feature type '%s", wx.FeatureType) |
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137 |
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138 epsg, err := wfs.CRSToEPSG(ft.DefaultCRS) |
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139 if err != nil { |
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140 feedback.Error("Unsupported CRS name '%s'", ft.DefaultCRS) |
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141 return nil, err |
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142 } |
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143 |
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144 if wx.SortBy != "" { |
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145 feedback.Info("Features will be sorted by '%s'", wx.SortBy) |
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146 } |
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147 |
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148 urls, err := wfs.GetFeaturesGET( |
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149 caps, wx.FeatureType, "application/json", wx.SortBy) |
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150 if err != nil { |
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151 feedback.Error("Cannot create GetFeature URLs. %v", err) |
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152 return nil, err |
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153 } |
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154 |
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155 tx, err := conn.BeginTx(ctx, nil) |
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156 if err != nil { |
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157 return nil, err |
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158 } |
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159 defer tx.Rollback() |
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160 |
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161 insertStmt, err := tx.PrepareContext(ctx, insertWaterwayAxisSQL) |
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162 if err != nil { |
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163 return nil, err |
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164 } |
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165 defer insertStmt.Close() |
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166 |
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167 // Delete the old features. |
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168 if _, err := tx.ExecContext(ctx, deleteWaterwayAxisSQL); err != nil { |
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169 return nil, err |
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170 } |
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171 |
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172 var ( |
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173 unsupported = stringCounter{} |
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174 missingProperties int |
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175 badProperties int |
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176 features int |
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177 ) |
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178 |
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179 if err := wfs.DownloadURLs(urls, func(url string, r io.Reader) error { |
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180 feedback.Info("Get features from: '%s'", url) |
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181 rfc, err := wfs.ParseRawFeatureCollection(r) |
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182 if err != nil { |
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183 return fmt.Errorf("parsing GetFeature document failed: %v", err) |
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184 } |
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185 if rfc.CRS != nil { |
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186 crsName := rfc.CRS.Properties.Name |
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187 if epsg, err = wfs.CRSToEPSG(crsName); err != nil { |
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188 feedback.Error("Unsupported CRS: %d", crsName) |
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189 return err |
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190 } |
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191 } |
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192 |
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193 // No features -> ignore. |
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194 if rfc.Features == nil { |
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195 return nil |
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196 } |
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197 |
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198 feedback.Info("Using EPSG: %d", epsg) |
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199 |
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200 for _, feature := range rfc.Features { |
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201 if feature.Properties == nil || feature.Geometry.Coordinates == nil { |
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202 missingProperties++ |
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203 continue |
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204 } |
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205 |
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206 var props waterwayAxisProperties |
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207 |
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208 if err := json.Unmarshal(*feature.Properties, &props); err != nil { |
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209 badProperties++ |
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210 continue |
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211 } |
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212 |
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213 var nobjnam sql.NullString |
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214 if props.NObjNnm != nil { |
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215 nobjnam = sql.NullString{String: *props.NObjNnm, Valid: true} |
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216 } |
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217 |
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218 switch feature.Geometry.Type { |
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219 case "LineString": |
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220 var l lineSlice |
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221 if err := json.Unmarshal(*feature.Geometry.Coordinates, &l); err != nil { |
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222 return err |
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223 } |
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224 if _, err := insertStmt.ExecContext( |
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225 ctx, |
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226 l.asWKB(), |
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227 epsg, |
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228 props.ObjNam, |
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229 nobjnam, |
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230 ); err != nil { |
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231 return err |
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232 } |
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233 features++ |
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234 case "MultiLineString": |
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235 var ls []lineSlice |
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236 if err := json.Unmarshal(*feature.Geometry.Coordinates, &ls); err != nil { |
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237 return err |
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238 } |
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239 for _, l := range ls { |
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240 if _, err := insertStmt.ExecContext( |
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241 ctx, |
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242 l.asWKB(), |
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243 epsg, |
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244 props.ObjNam, |
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245 nobjnam, |
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246 ); err != nil { |
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247 return err |
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248 } |
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249 features++ |
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250 } |
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251 default: |
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252 unsupported[feature.Geometry.Type]++ |
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253 } |
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254 } |
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255 return nil |
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256 }); err != nil { |
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257 return nil, err |
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258 } |
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259 |
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260 if badProperties > 0 { |
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261 feedback.Warn("Bad properties: %d", badProperties) |
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262 } |
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263 |
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264 if missingProperties > 0 { |
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265 feedback.Warn("Missing properties: %d", missingProperties) |
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266 } |
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267 |
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268 if len(unsupported) != 0 { |
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269 feedback.Warn("Unsupported types found: %s", unsupported) |
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270 } |
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271 |
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272 if features == 0 { |
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273 err := errors.New("No features found") |
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274 feedback.Error("%v", err) |
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275 return nil, err |
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276 } |
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277 |
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278 if err = tx.Commit(); err == nil { |
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279 feedback.Info("Storing %d features took %s", |
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280 features, time.Since(start)) |
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281 } |
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282 |
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283 return nil, err |
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284 } |