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annotate pkg/imports/wx.go @ 2723:a10022399e24

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WFS downloads: Fetch user and password from config.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 19 Mar 2019 12:42:43 +0100
parents 56c8ef515d93
children dff749c07ae0
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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 insertWaterwayAxisSQL = `
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95 WITH resp AS (
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96 SELECT best_utm(area::geometry) AS t,
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97 ST_Transform(area::geometry, best_utm(area::geometry)) AS a
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98 FROM users.responsibility_areas
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99 WHERE country = users.current_user_country()
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100 )
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101 INSERT INTO waterway.waterway_axis (wtwaxs, objnam, nobjnam)
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102 SELECT ST_Transform(clipped.geom, 4326)::geography, $3, $4
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103 FROM resp,
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104 ST_Node(ST_Transform(
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105 ST_GeomFromWKB($1, $2::integer), t)) AS new_line (new_line),
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106 LATERAL (SELECT (ST_Dump(
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107 CASE WHEN pg_has_role('sys_admin', 'MEMBER')
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108 THEN new_line
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109 ELSE ST_Intersection(a, new_line)
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110 END
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111 )).geom AS geom
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112 ) AS clipped
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113 `
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114 )
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115
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116 // Do executes the actual waterway axis import.
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117 func (wx *WaterwayAxis) Do(
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118 ctx context.Context,
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119 importID int64,
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120 conn *sql.Conn,
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parents:
diff changeset
121 feedback Feedback,
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parents:
diff changeset
122 ) (interface{}, error) {
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parents:
diff changeset
123
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124 start := time.Now()
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125
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diff changeset
126 feedback.Info("Import waterway axis")
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127
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diff changeset
128 feedback.Info("Loading capabilities from %s", wx.URL)
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diff changeset
129 caps, err := wfs.GetCapabilities(wx.URL)
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diff changeset
130 if err != nil {
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diff changeset
131 feedback.Error("Loading capabilities failed: %v", err)
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diff changeset
132 return nil, err
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133 }
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134
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diff changeset
135 ft := caps.FindFeatureType(wx.FeatureType)
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diff changeset
136 if ft == nil {
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diff changeset
137 return nil, fmt.Errorf("Unknown feature type '%s'", wx.FeatureType)
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138 }
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139
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140 feedback.Info("Found feature type '%s", wx.FeatureType)
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141
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diff changeset
142 epsg, err := wfs.CRSToEPSG(ft.DefaultCRS)
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diff changeset
143 if err != nil {
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diff changeset
144 feedback.Error("Unsupported CRS name '%s'", ft.DefaultCRS)
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145 return nil, err
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146 }
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parents: 1680
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147
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148 if wx.SortBy != "" {
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149 feedback.Info("Features will be sorted by '%s'", wx.SortBy)
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150 }
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diff changeset
151
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152 dl, err := wfs.GetFeatures(caps, wx.FeatureType, wx.SortBy)
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153 if err != nil {
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154 feedback.Error("Cannot create GetFeature URLs. %v", err)
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155 return nil, err
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156 }
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157
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diff changeset
158 tx, err := conn.BeginTx(ctx, nil)
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diff changeset
159 if err != nil {
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diff changeset
160 return nil, err
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parents: 1680
diff changeset
161 }
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diff changeset
162 defer tx.Rollback()
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diff changeset
163
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diff changeset
164 insertStmt, err := tx.PrepareContext(ctx, insertWaterwayAxisSQL)
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diff changeset
165 if err != nil {
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diff changeset
166 return nil, err
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parents: 1680
diff changeset
167 }
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diff changeset
168 defer insertStmt.Close()
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diff changeset
169
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diff changeset
170 // Delete the old features.
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parents: 1680
diff changeset
171 if _, err := tx.ExecContext(ctx, deleteWaterwayAxisSQL); err != nil {
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parents: 1680
diff changeset
172 return nil, err
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parents: 1680
diff changeset
173 }
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diff changeset
174
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diff changeset
175 var (
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176 unsupported = stringCounter{}
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diff changeset
177 missingProperties int
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diff changeset
178 badProperties int
1681
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diff changeset
179 features int
1680
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diff changeset
180 )
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diff changeset
181
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182 // TODO: Fetch from parameters.
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diff changeset
183 user, password := "", ""
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184
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diff changeset
185 if err := dl.Download(user, password, func(url string, r io.Reader) error {
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parents: 1828
diff changeset
186 feedback.Info("Get features from: '%s'", url)
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diff changeset
187 rfc, err := wfs.ParseRawFeatureCollection(r)
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diff changeset
188 if err != nil {
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parents: 1754
diff changeset
189 return fmt.Errorf("parsing GetFeature document failed: %v", err)
1679
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diff changeset
190 }
1681
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parents: 1680
diff changeset
191 if rfc.CRS != nil {
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parents: 1680
diff changeset
192 crsName := rfc.CRS.Properties.Name
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diff changeset
193 if epsg, err = wfs.CRSToEPSG(crsName); err != nil {
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parents: 1680
diff changeset
194 feedback.Error("Unsupported CRS: %d", crsName)
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parents: 1680
diff changeset
195 return err
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parents: 1680
diff changeset
196 }
1679
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diff changeset
197 }
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parents: 1677
diff changeset
198
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diff changeset
199 // No features -> ignore.
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parents: 1677
diff changeset
200 if rfc.Features == nil {
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parents: 1677
diff changeset
201 return nil
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parents: 1677
diff changeset
202 }
1680
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parents: 1679
diff changeset
203
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509e8728e846 Fixed pre-calculated size of 2D WKB line strings.
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parents: 1682
diff changeset
204 feedback.Info("Using EPSG: %d", epsg)
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parents: 1682
diff changeset
205
1679
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parents: 1677
diff changeset
206 for _, feature := range rfc.Features {
1681
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parents: 1680
diff changeset
207 if feature.Properties == nil || feature.Geometry.Coordinates == nil {
1680
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parents: 1679
diff changeset
208 missingProperties++
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
209 continue
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
210 }
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
211
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
212 var props waterwayAxisProperties
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parents: 1679
diff changeset
213
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
214 if err := json.Unmarshal(*feature.Properties, &props); err != nil {
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
215 badProperties++
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
216 continue
de8089944b19 Waterway axis import: Started extracting properties from the features.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1679
diff changeset
217 }
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
218
1681
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parents: 1680
diff changeset
219 var nobjnam sql.NullString
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parents: 1680
diff changeset
220 if props.NObjNnm != nil {
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parents: 1680
diff changeset
221 nobjnam = sql.NullString{String: *props.NObjNnm, Valid: true}
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parents: 1680
diff changeset
222 }
1680
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
223
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parents: 1677
diff changeset
224 switch feature.Geometry.Type {
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parents: 1677
diff changeset
225 case "LineString":
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parents: 1764
diff changeset
226 var l lineSlice
1681
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
227 if err := json.Unmarshal(*feature.Geometry.Coordinates, &l); err != nil {
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parents: 1680
diff changeset
228 return err
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
229 }
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parents: 1680
diff changeset
230 if _, err := insertStmt.ExecContext(
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parents: 1680
diff changeset
231 ctx,
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parents: 1680
diff changeset
232 l.asWKB(),
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parents: 1680
diff changeset
233 epsg,
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parents: 1680
diff changeset
234 props.ObjNam,
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235 nobjnam,
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parents: 1680
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236 ); err != nil {
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parents: 1680
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237 return err
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parents: 1680
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238 }
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239 features++
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240 case "MultiLineString":
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241 var ls []lineSlice
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parents: 1680
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242 if err := json.Unmarshal(*feature.Geometry.Coordinates, &ls); err != nil {
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parents: 1680
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243 return err
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parents: 1680
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244 }
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parents: 1680
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245 for _, l := range ls {
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parents: 1680
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246 if _, err := insertStmt.ExecContext(
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parents: 1680
diff changeset
247 ctx,
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parents: 1680
diff changeset
248 l.asWKB(),
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parents: 1680
diff changeset
249 epsg,
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parents: 1680
diff changeset
250 props.ObjNam,
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parents: 1680
diff changeset
251 nobjnam,
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parents: 1680
diff changeset
252 ); err != nil {
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
253 return err
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parents: 1680
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254 }
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parents: 1680
diff changeset
255 features++
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
256 }
1679
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diff changeset
257 default:
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diff changeset
258 unsupported[feature.Geometry.Type]++
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parents: 1677
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259 }
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parents: 1677
diff changeset
260 }
2dc7768be0e4 Waterway axis import: More on reading data from WFS. TODO: Parse to concrete features.
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parents: 1677
diff changeset
261 return nil
2dc7768be0e4 Waterway axis import: More on reading data from WFS. TODO: Parse to concrete features.
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parents: 1677
diff changeset
262 }); err != nil {
2dc7768be0e4 Waterway axis import: More on reading data from WFS. TODO: Parse to concrete features.
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parents: 1677
diff changeset
263 return nil, err
2dc7768be0e4 Waterway axis import: More on reading data from WFS. TODO: Parse to concrete features.
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parents: 1677
diff changeset
264 }
2dc7768be0e4 Waterway axis import: More on reading data from WFS. TODO: Parse to concrete features.
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parents: 1677
diff changeset
265
1680
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parents: 1679
diff changeset
266 if badProperties > 0 {
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parents: 1679
diff changeset
267 feedback.Warn("Bad properties: %d", badProperties)
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parents: 1679
diff changeset
268 }
de8089944b19 Waterway axis import: Started extracting properties from the features.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1679
diff changeset
269
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
270 if missingProperties > 0 {
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
271 feedback.Warn("Missing properties: %d", missingProperties)
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
272 }
de8089944b19 Waterway axis import: Started extracting properties from the features.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1679
diff changeset
273
1785
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parents: 1764
diff changeset
274 if len(unsupported) != 0 {
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Sascha L. Teichmann <teichmann@intevation.de>
parents: 1764
diff changeset
275 feedback.Warn("Unsupported types found: %s", unsupported)
1679
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parents: 1677
diff changeset
276 }
2dc7768be0e4 Waterway axis import: More on reading data from WFS. TODO: Parse to concrete features.
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parents: 1677
diff changeset
277
1828
1ecfcf46e4da Waterway area/axis: Be more informative if features are bad.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1796
diff changeset
278 if features == 0 {
1ecfcf46e4da Waterway area/axis: Be more informative if features are bad.
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parents: 1796
diff changeset
279 err := errors.New("No features found")
1ecfcf46e4da Waterway area/axis: Be more informative if features are bad.
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parents: 1796
diff changeset
280 feedback.Error("%v", err)
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parents: 1796
diff changeset
281 return nil, err
1ecfcf46e4da Waterway area/axis: Be more informative if features are bad.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1796
diff changeset
282 }
1ecfcf46e4da Waterway area/axis: Be more informative if features are bad.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1796
diff changeset
283
1681
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parents: 1680
diff changeset
284 if err = tx.Commit(); err == nil {
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1680
diff changeset
285 feedback.Info("Storing %d features took %s",
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1680
diff changeset
286 features, time.Since(start))
1679
2dc7768be0e4 Waterway axis import: More on reading data from WFS. TODO: Parse to concrete features.
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parents: 1677
diff changeset
287 }
2dc7768be0e4 Waterway axis import: More on reading data from WFS. TODO: Parse to concrete features.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1677
diff changeset
288
1681
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
289 return nil, err
1675
8fec3887c7e5 Waterway axis import: Added stub.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
290 }