Mercurial > gemma
annotate pkg/imports/wx.go @ 5413:99f32f0dc70c marking-single-beam
Added tools to classify vertices by their heights with class breaks.
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Wed, 07 Jul 2021 11:42:25 +0200 |
parents | 6fe3662aafeb |
children | 6270951dda28 |
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 // WXJobKind is the import queue type identifier. |
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18 const WXJobKind JobKind = "wx" |
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19 |
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20 func init() { |
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21 RegisterJobCreator(WXJobKind, |
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22 &WFSFeatureJobCreator{ |
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23 description: "waterway axis", |
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24 depends: [2][]string{{"waterway_axis"}}, |
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25 newConsumer: newSQLConsumer( |
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26 prepareStmnts(insertWaterwayAxisSQL), |
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27 consume, |
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28 axisInvalidation, |
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29 newMultiLineFeature(func() interface{} { |
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30 return new(waterwayAxisProperties) |
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31 }), |
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32 ), |
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33 }) |
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34 } |
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35 |
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36 type waterwayAxisProperties struct { |
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37 ObjNam string `json:"hydro_objnam"` |
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38 NObjNnm *string `json:"hydro_nobjnm"` |
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39 } |
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40 |
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41 const ( |
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42 insertWaterwayAxisSQL = ` |
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43 WITH resp AS ( |
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44 SELECT users.current_user_area_utm() AS a |
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45 ), |
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46 g AS ( |
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47 SELECT |
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48 ST_Multi(ST_Node(ST_CollectionExtract(ST_Transform(new_ax, 4326), 2))) |
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49 AS new_ax |
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50 FROM ST_GeomFromWKB($1, $2::integer) AS new_line (new_line), |
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51 LATERAL (SELECT |
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52 CASE WHEN pg_has_role('sys_admin', 'MEMBER') |
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53 OR ST_Covers((SELECT a FROM resp), |
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54 ST_Transform(new_line, (SELECT ST_SRID(a) FROM resp))) |
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55 THEN new_line |
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56 ELSE ST_Intersection((SELECT ST_Buffer(a, -0.0001) FROM resp), |
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57 ST_Node(ST_Transform(new_line, (SELECT ST_SRID(a) FROM resp)))) |
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58 END) AS new_ax (new_ax) |
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59 -- Do nothing if intersection is empty: |
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60 WHERE NOT ST_IsEmpty(new_ax) |
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61 ), |
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62 t AS ( |
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63 UPDATE waterway.waterway_axis SET last_found = current_timestamp |
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65 -- to avoid evaluating more costly conditions including those | |
66 -- introduced by row level security policies: | |
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67 WHERE (SELECT new_ax FROM g) IS NOT NULL |
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68 AND validity @> current_timestamp |
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69 AND ( |
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70 wtwaxs, objnam, nobjnam |
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71 ) IS NOT DISTINCT FROM ( |
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72 (SELECT new_ax FROM g), $3, $4) |
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73 RETURNING 1 |
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74 ) |
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75 INSERT INTO waterway.waterway_axis (wtwaxs, objnam, nobjnam) |
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76 SELECT new_ax, $3, $4 |
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77 FROM g |
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78 WHERE NOT EXISTS(SELECT 1 FROM t) |
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79 RETURNING id |
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80 ` |
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81 invalidateAxisSQL = ` |
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82 UPDATE waterway.waterway_axis |
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83 SET validity = tstzrange(lower(validity), current_timestamp) |
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84 WHERE validity @> current_timestamp |
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85 AND last_found < current_timestamp |
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86 ` |
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87 ) |
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88 |
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89 func axisInvalidation(spc *SQLGeometryConsumer) error { |
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90 res, err := spc.tx.ExecContext(spc.ctx, invalidateAxisSQL) |
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91 if err != nil { |
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92 return err |
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93 } |
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94 old, err := res.RowsAffected() |
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95 if err != nil { |
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96 return err |
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97 } |
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98 if old == 0 { |
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99 return ErrFeaturesUnmodified |
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100 } |
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101 spc.feedback.Info( |
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102 "Number of features removed from data source: %d", old) |
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103 return nil |
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104 } |