Mercurial > gemma

annotate pkg/imports/wx.go @ 2721:56c8ef515d93

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WFS downloader: Use new GML/GeoJSON factory function in gemma.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Tue, 19 Mar 2019 12:28:22 +0100
parents 2b6f73c30016
children a10022399e24
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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 }
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41
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42 // WXJobKind is the import queue type identifier.
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43 const WXJobKind JobKind = "wx"
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44
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45 type wxJobCreator struct{}
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46
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47 func init() {
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48 RegisterJobCreator(WXJobKind, wxJobCreator{})
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49 }
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50
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51 func (wxJobCreator) Description() string { return "waterway axis" }
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52
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53 func (wxJobCreator) AutoAccept() bool { return true }
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54
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55 func (wxJobCreator) Create() Job { return new(WaterwayAxis) }
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56
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57 func (wxJobCreator) Depends() []string {
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58 return []string{
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59 "waterway_axis",
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60 }
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61 }
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62
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63 // StageDone is a NOP for waterway axis imports.
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64 func (wxJobCreator) StageDone(context.Context, *sql.Tx, int64) error {
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65 return nil
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66 }
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67
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68 // CleanUp for waterway axis imports is a NOP.
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69 func (*WaterwayAxis) CleanUp() error { return nil }
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70
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71 type waterwayAxisProperties struct {
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72 ObjNam string `json:"hydro_objnam"`
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73 NObjNnm *string `json:"hydro_nobjnm"`
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74 }
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75
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76 const (
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77 deleteWaterwayAxisSQL = `
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78 WITH resp AS (
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79 SELECT best_utm(area::geometry) AS t,
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80 ST_Transform(area::geometry, best_utm(area::geometry)) AS a
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81 FROM users.responsibility_areas
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82 WHERE country = users.current_user_country()
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83 )
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84 DELETE FROM waterway.waterway_axis
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85 WHERE pg_has_role('sys_admin', 'MEMBER')
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86 OR ST_Covers((SELECT a FROM resp),
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87 ST_Transform(wtwaxs::geometry, (SELECT t FROM resp)))
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88 `
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89
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90 insertWaterwayAxisSQL = `
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91 WITH resp AS (
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92 SELECT best_utm(area::geometry) AS t,
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93 ST_Transform(area::geometry, best_utm(area::geometry)) AS a
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94 FROM users.responsibility_areas
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95 WHERE country = users.current_user_country()
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96 )
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97 INSERT INTO waterway.waterway_axis (wtwaxs, objnam, nobjnam)
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98 SELECT ST_Transform(clipped.geom, 4326)::geography, $3, $4
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99 FROM resp,
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100 ST_Node(ST_Transform(
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101 ST_GeomFromWKB($1, $2::integer), t)) AS new_line (new_line),
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102 LATERAL (SELECT (ST_Dump(
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103 CASE WHEN pg_has_role('sys_admin', 'MEMBER')
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104 THEN new_line
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105 ELSE ST_Intersection(a, new_line)
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106 END
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107 )).geom AS geom
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108 ) AS clipped
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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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parents: 1677
diff changeset
122 feedback.Info("Import waterway axis")
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parents: 1677
diff changeset
123
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parents: 1677
diff changeset
124 feedback.Info("Loading capabilities from %s", wx.URL)
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parents: 1677
diff changeset
125 caps, err := wfs.GetCapabilities(wx.URL)
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parents: 1677
diff changeset
126 if err != nil {
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parents: 1677
diff changeset
127 feedback.Error("Loading capabilities failed: %v", err)
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parents: 1677
diff changeset
128 return nil, err
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parents: 1677
diff changeset
129 }
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parents: 1677
diff changeset
130
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parents: 1677
diff changeset
131 ft := caps.FindFeatureType(wx.FeatureType)
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diff changeset
132 if ft == nil {
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diff changeset
133 return nil, fmt.Errorf("Unknown feature type '%s'", wx.FeatureType)
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134 }
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parents: 1677
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135
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parents: 1696
diff changeset
136 feedback.Info("Found feature type '%s", wx.FeatureType)
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137
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parents: 1680
diff changeset
138 epsg, err := wfs.CRSToEPSG(ft.DefaultCRS)
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parents: 1680
diff changeset
139 if err != nil {
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parents: 1680
diff changeset
140 feedback.Error("Unsupported CRS name '%s'", ft.DefaultCRS)
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parents: 1680
diff changeset
141 return nil, err
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parents: 1680
diff changeset
142 }
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parents: 1680
diff changeset
143
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parents: 1696
diff changeset
144 if wx.SortBy != "" {
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parents: 1696
diff changeset
145 feedback.Info("Features will be sorted by '%s'", wx.SortBy)
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parents: 1696
diff changeset
146 }
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parents: 1696
diff changeset
147
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parents: 2719
diff changeset
148 dl, err := wfs.GetFeatures(caps, wx.FeatureType, wx.SortBy)
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parents: 1677
diff changeset
149 if err != nil {
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diff changeset
150 feedback.Error("Cannot create GetFeature URLs. %v", err)
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diff changeset
151 return nil, err
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parents: 1677
diff changeset
152 }
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153
1681
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parents: 1680
diff changeset
154 tx, err := conn.BeginTx(ctx, nil)
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parents: 1680
diff changeset
155 if err != nil {
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parents: 1680
diff changeset
156 return nil, err
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parents: 1680
diff changeset
157 }
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parents: 1680
diff changeset
158 defer tx.Rollback()
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parents: 1680
diff changeset
159
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parents: 1680
diff changeset
160 insertStmt, err := tx.PrepareContext(ctx, insertWaterwayAxisSQL)
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
161 if err != nil {
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
162 return nil, err
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parents: 1680
diff changeset
163 }
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parents: 1680
diff changeset
164 defer insertStmt.Close()
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parents: 1680
diff changeset
165
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parents: 1680
diff changeset
166 // Delete the old features.
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parents: 1680
diff changeset
167 if _, err := tx.ExecContext(ctx, deleteWaterwayAxisSQL); err != nil {
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
168 return nil, err
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parents: 1680
diff changeset
169 }
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diff changeset
170
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diff changeset
171 var (
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diff changeset
172 unsupported = stringCounter{}
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diff changeset
173 missingProperties int
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diff changeset
174 badProperties int
1681
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diff changeset
175 features int
1680
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diff changeset
176 )
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parents: 1677
diff changeset
177
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parents: 2649
diff changeset
178 // TODO: Fetch from parameters.
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diff changeset
179 user, password := "", ""
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diff changeset
180
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parents: 2719
diff changeset
181 if err := dl.Download(user, password, func(url string, r io.Reader) error {
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parents: 1828
diff changeset
182 feedback.Info("Get features from: '%s'", url)
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diff changeset
183 rfc, err := wfs.ParseRawFeatureCollection(r)
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parents: 1677
diff changeset
184 if err != nil {
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parents: 1754
diff changeset
185 return fmt.Errorf("parsing GetFeature document failed: %v", err)
1679
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parents: 1677
diff changeset
186 }
1681
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parents: 1680
diff changeset
187 if rfc.CRS != nil {
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parents: 1680
diff changeset
188 crsName := rfc.CRS.Properties.Name
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parents: 1680
diff changeset
189 if epsg, err = wfs.CRSToEPSG(crsName); err != nil {
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parents: 1680
diff changeset
190 feedback.Error("Unsupported CRS: %d", crsName)
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parents: 1680
diff changeset
191 return err
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parents: 1680
diff changeset
192 }
1679
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parents: 1677
diff changeset
193 }
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parents: 1677
diff changeset
194
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parents: 1677
diff changeset
195 // No features -> ignore.
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parents: 1677
diff changeset
196 if rfc.Features == nil {
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parents: 1677
diff changeset
197 return nil
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parents: 1677
diff changeset
198 }
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parents: 1679
diff changeset
199
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parents: 1682
diff changeset
200 feedback.Info("Using EPSG: %d", epsg)
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parents: 1682
diff changeset
201
1679
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parents: 1677
diff changeset
202 for _, feature := range rfc.Features {
1681
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parents: 1680
diff changeset
203 if feature.Properties == nil || feature.Geometry.Coordinates == nil {
1680
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parents: 1679
diff changeset
204 missingProperties++
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
205 continue
de8089944b19 Waterway axis import: Started extracting properties from the features.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1679
diff changeset
206 }
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
207
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
208 var props waterwayAxisProperties
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parents: 1679
diff changeset
209
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
210 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
211 badProperties++
de8089944b19 Waterway axis import: Started extracting properties from the features.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1679
diff changeset
212 continue
de8089944b19 Waterway axis import: Started extracting properties from the features.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1679
diff changeset
213 }
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
214
1681
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parents: 1680
diff changeset
215 var nobjnam sql.NullString
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parents: 1680
diff changeset
216 if props.NObjNnm != nil {
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parents: 1680
diff changeset
217 nobjnam = sql.NullString{String: *props.NObjNnm, Valid: true}
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parents: 1680
diff changeset
218 }
1680
de8089944b19 Waterway axis import: Started extracting properties from the features.
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parents: 1679
diff changeset
219
1679
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parents: 1677
diff changeset
220 switch feature.Geometry.Type {
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parents: 1677
diff changeset
221 case "LineString":
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parents: 1764
diff changeset
222 var l lineSlice
1681
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1680
diff changeset
223 if err := json.Unmarshal(*feature.Geometry.Coordinates, &l); err != nil {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1680
diff changeset
224 return err
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1680
diff changeset
225 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 1680
diff changeset
226 if _, err := insertStmt.ExecContext(
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parents: 1680
diff changeset
227 ctx,
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parents: 1680
diff changeset
228 l.asWKB(),
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parents: 1680
diff changeset
229 epsg,
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parents: 1680
diff changeset
230 props.ObjNam,
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parents: 1680
diff changeset
231 nobjnam,
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parents: 1680
diff changeset
232 ); err != nil {
4d6ce621379e Waterway axis import: Completed, but the final commit unexpectedly resulted in rollback.
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parents: 1680
diff changeset
233 return err
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234 }
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235 features++
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236 case "MultiLineString":
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237 var ls []lineSlice
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238 if err := json.Unmarshal(*feature.Geometry.Coordinates, &ls); err != nil {
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239 return err
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240 }
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241 for _, l := range ls {
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242 if _, err := insertStmt.ExecContext(
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243 ctx,
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244 l.asWKB(),
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245 epsg,
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246 props.ObjNam,
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247 nobjnam,
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248 ); err != nil {
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249 return err
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250 }
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251 features++
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252 }
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253 default:
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254 unsupported[feature.Geometry.Type]++
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255 }
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256 }
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257 return nil
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258 }); err != nil {
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259 return nil, err
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260 }
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261
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262 if badProperties > 0 {
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263 feedback.Warn("Bad properties: %d", badProperties)
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264 }
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parents: 1679
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265
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266 if missingProperties > 0 {
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267 feedback.Warn("Missing properties: %d", missingProperties)
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268 }
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269
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270 if len(unsupported) != 0 {
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diff changeset
271 feedback.Warn("Unsupported types found: %s", unsupported)
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272 }
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273
1828
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parents: 1796
diff changeset
274 if features == 0 {
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diff changeset
275 err := errors.New("No features found")
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diff changeset
276 feedback.Error("%v", err)
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diff changeset
277 return nil, err
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parents: 1796
diff changeset
278 }
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parents: 1796
diff changeset
279
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parents: 1680
diff changeset
280 if err = tx.Commit(); err == nil {
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parents: 1680
diff changeset
281 feedback.Info("Storing %d features took %s",
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parents: 1680
diff changeset
282 features, time.Since(start))
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283 }
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parents: 1677
diff changeset
284
1681
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parents: 1680
diff changeset
285 return nil, err
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parents:
diff changeset
286 }