Mercurial > gemma
annotate pkg/imports/wx.go @ 2730:c642905c0b3b
Cosmetics: Break overlong line.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Tue, 19 Mar 2019 14:39:04 +0100 |
parents | 7cb027be277d |
children | 5850ac0f9ab6 |
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, 2019 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 // * Tom Gottfried <tom.gottfried@intevation.de> |
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14 |
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15 package imports |
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16 |
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17 import ( |
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18 "context" |
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19 "database/sql" |
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20 "encoding/json" |
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21 "errors" |
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22 "fmt" |
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23 "io" |
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24 "time" |
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25 |
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26 "gemma.intevation.de/gemma/pkg/wfs" |
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27 ) |
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28 |
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29 // WaterwayAxis is an import job to import |
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30 // the waterway axes in form of line string geometries |
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31 // and attribute data from a WFS service. |
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32 type WaterwayAxis struct { |
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33 // URL the GetCapabilities URL of the WFS service. |
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34 URL string `json:"url"` |
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35 // FeatureType selects the feature type of the WFS service. |
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36 FeatureType string `json:"feature-type"` |
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37 // SortBy works around misconfigured services to |
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38 // establish a sort order to get the features. |
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39 SortBy string `json:"sort-by"` |
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40 // User is an optional username for Basic Auth. |
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41 User string `json:"user,omitempty"` |
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42 // Password is an optional password for Basic Auth. |
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43 Password string `json:"password,omitempty"` |
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44 } |
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45 |
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46 // WXJobKind is the import queue type identifier. |
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47 const WXJobKind JobKind = "wx" |
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48 |
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49 type wxJobCreator struct{} |
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50 |
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51 func init() { |
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52 RegisterJobCreator(WXJobKind, wxJobCreator{}) |
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53 } |
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54 |
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55 func (wxJobCreator) Description() string { return "waterway axis" } |
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56 |
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57 func (wxJobCreator) AutoAccept() bool { return true } |
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58 |
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59 func (wxJobCreator) Create() Job { return new(WaterwayAxis) } |
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60 |
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61 func (wxJobCreator) Depends() []string { |
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62 return []string{ |
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63 "waterway_axis", |
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64 } |
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65 } |
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66 |
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67 // StageDone is a NOP for waterway axis imports. |
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68 func (wxJobCreator) StageDone(context.Context, *sql.Tx, int64) error { |
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69 return nil |
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70 } |
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71 |
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72 // CleanUp for waterway axis imports is a NOP. |
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73 func (*WaterwayAxis) CleanUp() error { return nil } |
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74 |
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75 type waterwayAxisProperties struct { |
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76 ObjNam string `json:"hydro_objnam"` |
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77 NObjNnm *string `json:"hydro_nobjnm"` |
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78 } |
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79 |
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80 const ( |
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81 deleteWaterwayAxisSQL = ` |
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82 WITH resp AS ( |
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83 SELECT best_utm(area::geometry) AS t, |
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84 ST_Transform(area::geometry, best_utm(area::geometry)) AS a |
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85 FROM users.responsibility_areas |
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86 WHERE country = users.current_user_country() |
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87 ) |
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88 DELETE FROM waterway.waterway_axis |
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89 WHERE pg_has_role('sys_admin', 'MEMBER') |
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90 OR ST_Covers((SELECT a FROM resp), |
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91 ST_Transform(wtwaxs::geometry, (SELECT t FROM resp))) |
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92 ` |
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93 |
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94 checkCrossingAxisSQL = ` |
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95 SELECT ST_AsText(ST_Intersection(new_line.wtwaxs, axis.wtwaxs)) |
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96 FROM waterway.waterway_axis AS axis, waterway.waterway_axis AS new_line |
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97 WHERE new_line.id = $1 AND axis.id <> $1 |
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98 AND ST_Crosses(new_line.wtwaxs::geometry, axis.wtwaxs::geometry) |
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99 ` |
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100 |
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101 insertWaterwayAxisSQL = ` |
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102 WITH resp AS ( |
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103 SELECT best_utm(area::geometry) AS t, |
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104 ST_Transform(area::geometry, best_utm(area::geometry)) AS a |
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105 FROM users.responsibility_areas |
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106 WHERE country = users.current_user_country() |
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107 ) |
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108 INSERT INTO waterway.waterway_axis (wtwaxs, objnam, nobjnam) |
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109 SELECT ST_Transform(clipped.geom, 4326)::geography, $3, $4 |
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110 FROM resp, |
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111 ST_Node(ST_Transform( |
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112 ST_GeomFromWKB($1, $2::integer), t)) AS new_line (new_line), |
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113 LATERAL (SELECT (ST_Dump( |
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114 CASE WHEN pg_has_role('sys_admin', 'MEMBER') |
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115 THEN new_line |
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116 ELSE ST_Intersection(a, new_line) |
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117 END |
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118 )).geom AS geom |
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119 ) AS clipped |
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120 RETURNING id |
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121 ` |
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122 ) |
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123 |
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124 // Do executes the actual waterway axis import. |
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125 func (wx *WaterwayAxis) Do( |
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126 ctx context.Context, |
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127 importID int64, |
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128 conn *sql.Conn, |
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129 feedback Feedback, |
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130 ) (interface{}, error) { |
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131 |
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132 start := time.Now() |
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133 |
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134 feedback.Info("Import waterway axis") |
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135 |
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136 feedback.Info("Loading capabilities from %s", wx.URL) |
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137 caps, err := wfs.GetCapabilities(wx.URL) |
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138 if err != nil { |
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139 feedback.Error("Loading capabilities failed: %v", err) |
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140 return nil, err |
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141 } |
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142 |
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143 ft := caps.FindFeatureType(wx.FeatureType) |
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144 if ft == nil { |
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145 return nil, fmt.Errorf("Unknown feature type '%s'", wx.FeatureType) |
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146 } |
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147 |
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148 feedback.Info("Found feature type '%s", wx.FeatureType) |
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149 |
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150 epsg, err := wfs.CRSToEPSG(ft.DefaultCRS) |
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151 if err != nil { |
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152 feedback.Error("Unsupported CRS name '%s'", ft.DefaultCRS) |
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153 return nil, err |
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154 } |
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155 |
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156 if wx.SortBy != "" { |
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157 feedback.Info("Features will be sorted by '%s'", wx.SortBy) |
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158 } |
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159 |
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160 dl, err := wfs.GetFeatures(caps, wx.FeatureType, wx.SortBy) |
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161 if err != nil { |
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162 feedback.Error("Cannot create GetFeature URLs. %v", err) |
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163 return nil, err |
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164 } |
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165 |
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166 tx, err := conn.BeginTx(ctx, nil) |
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167 if err != nil { |
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168 return nil, err |
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169 } |
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170 defer tx.Rollback() |
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171 |
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172 insertStmt, err := tx.PrepareContext(ctx, insertWaterwayAxisSQL) |
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173 if err != nil { |
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174 return nil, err |
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175 } |
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176 defer insertStmt.Close() |
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177 |
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178 checkCrossingStmt, err := tx.PrepareContext(ctx, checkCrossingAxisSQL) |
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179 if err != nil { |
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180 return nil, err |
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181 } |
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182 defer checkCrossingStmt.Close() |
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183 |
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184 // Delete the old features. |
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185 if _, err := tx.ExecContext(ctx, deleteWaterwayAxisSQL); err != nil { |
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186 return nil, err |
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187 } |
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188 |
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189 var ( |
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190 unsupported = stringCounter{} |
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191 missingProperties int |
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192 badProperties int |
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193 features int |
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194 ) |
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195 |
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196 if err := dl.Download(wx.User, wx.Password, func(url string, r io.Reader) error { |
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197 feedback.Info("Get features from: '%s'", url) |
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198 rfc, err := wfs.ParseRawFeatureCollection(r) |
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199 if err != nil { |
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200 return fmt.Errorf("parsing GetFeature document failed: %v", err) |
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201 } |
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202 if rfc.CRS != nil { |
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203 crsName := rfc.CRS.Properties.Name |
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204 if epsg, err = wfs.CRSToEPSG(crsName); err != nil { |
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205 feedback.Error("Unsupported CRS: %d", crsName) |
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206 return err |
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207 } |
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208 } |
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209 |
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210 // No features -> ignore. |
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211 if rfc.Features == nil { |
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212 return nil |
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213 } |
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214 |
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215 feedback.Info("Using EPSG: %d", epsg) |
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216 |
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217 for _, feature := range rfc.Features { |
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218 if feature.Properties == nil || feature.Geometry.Coordinates == nil { |
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219 missingProperties++ |
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220 continue |
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221 } |
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222 |
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223 var props waterwayAxisProperties |
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224 |
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225 if err := json.Unmarshal(*feature.Properties, &props); err != nil { |
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226 badProperties++ |
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227 continue |
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228 } |
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229 |
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230 var nobjnam sql.NullString |
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231 if props.NObjNnm != nil { |
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232 nobjnam = sql.NullString{String: *props.NObjNnm, Valid: true} |
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233 } |
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234 |
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235 switch feature.Geometry.Type { |
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236 case "LineString": |
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237 var l lineSlice |
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238 if err := json.Unmarshal(*feature.Geometry.Coordinates, &l); err != nil { |
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239 return err |
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240 } |
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241 if err := storeLinestring( |
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242 ctx, |
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243 tx, |
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244 feedback, |
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245 l, |
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246 epsg, |
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247 props, |
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248 nobjnam, |
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249 checkCrossingStmt, |
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250 insertStmt); err != nil { |
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251 return err |
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252 } |
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253 features++ |
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254 case "MultiLineString": |
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255 var ls []lineSlice |
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256 if err := json.Unmarshal(*feature.Geometry.Coordinates, &ls); err != nil { |
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257 return err |
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258 } |
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259 for _, l := range ls { |
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260 if err := storeLinestring( |
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261 ctx, |
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262 tx, |
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263 feedback, |
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264 l, |
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265 epsg, |
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266 props, |
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267 nobjnam, |
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268 checkCrossingStmt, |
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269 insertStmt); err != nil { |
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270 return err |
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271 } |
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272 features++ |
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273 } |
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274 default: |
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275 unsupported[feature.Geometry.Type]++ |
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276 } |
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277 } |
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278 return nil |
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279 }); err != nil { |
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280 return nil, err |
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281 } |
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282 |
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283 if badProperties > 0 { |
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284 feedback.Warn("Bad properties: %d", badProperties) |
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285 } |
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286 |
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287 if missingProperties > 0 { |
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288 feedback.Warn("Missing properties: %d", missingProperties) |
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289 } |
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290 |
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291 if len(unsupported) != 0 { |
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292 feedback.Warn("Unsupported types found: %s", unsupported) |
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293 } |
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294 |
1828
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295 if features == 0 { |
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296 err := errors.New("No features found") |
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297 feedback.Error("%v", err) |
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298 return nil, err |
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299 } |
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300 |
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301 if err = tx.Commit(); err == nil { |
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302 feedback.Info("Storing %d features took %s", |
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303 features, time.Since(start)) |
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304 } |
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305 |
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306 return nil, err |
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307 } |
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308 |
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309 func storeLinestring( |
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310 ctx context.Context, |
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311 tx *sql.Tx, |
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312 feedback Feedback, |
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313 l lineSlice, |
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314 epsg int, |
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315 props waterwayAxisProperties, |
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316 nobjnam sql.NullString, |
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317 checkCrossingStmt, insertStmt *sql.Stmt, |
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318 ) error { |
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319 var id int |
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320 if err := insertStmt.QueryRowContext( |
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321 ctx, |
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322 l.asWKB(), |
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323 epsg, |
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324 props.ObjNam, |
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325 nobjnam, |
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326 ).Scan(&id); err != nil { |
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327 return err |
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328 } |
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329 |
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330 var crossing string |
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331 switch err := checkCrossingStmt.QueryRowContext( |
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332 ctx, |
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333 id, |
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334 ).Scan(&crossing); { |
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335 case err != nil && err != sql.ErrNoRows: |
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336 return err |
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337 case err == nil: |
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338 feedback.Warn( |
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339 "Linestring %d crosses previously imported linestring near %s. "+ |
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340 "Finding a contiguous axis may not work here", |
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341 id, crossing) |
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342 } |
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343 return nil |
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344 } |