Mercurial > gemma

annotate pkg/controllers/search.go @ 2672:b997e1fd1d3d import-overview-rework

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fixed warning SQL prefix for selection.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 14 Mar 2019 17:29:36 +0100
parents 5bb1e3c1f364
children 571801483a70
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1017
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1 // This is Free Software under GNU Affero General Public License v >= 3.0
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2 // without warranty, see README.md and license for details.
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3 //
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4 // SPDX-License-Identifier: AGPL-3.0-or-later
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5 // License-Filename: LICENSES/AGPL-3.0.txt
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6 //
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7 // Copyright (C) 2018 by via donau
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8 // – Österreichische Wasserstraßen-Gesellschaft mbH
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9 // Software engineering by Intevation GmbH
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10 //
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11 // Author(s):
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12 // * Sascha Wilde <sascha.wilde@intevation.de>
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13 // * Sascha Teichmann <sascha.teichmann@intevation.de>
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14
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15 package controllers
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16
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17 import (
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18 "database/sql"
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19 "net/http"
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20 "regexp"
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21 "strconv"
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22 "strings"
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23
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24 "gemma.intevation.de/gemma/pkg/models"
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25 )
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26
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27 const (
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28 searchHectometreSQL = `SELECT COALESCE(json_agg(r),'[]')
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29 FROM (SELECT (location_code).hectometre || ' rhm' AS name,
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30 ST_AsGeoJSON(geom)::json AS geom, 'rhm' AS type
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31 FROM waterway.distance_marks_virtual
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32 WHERE (location_code).hectometre = $1) r`
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33
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34 searchMostSQL = `SELECT search_most($1)::text`
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35
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36 listBottlenecksSQL = `
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37 SELECT COALESCE(json_agg(r),'[]')
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38 FROM (
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39 SELECT
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40 objnam AS name,
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41 ST_AsGeoJSON(ST_Centroid(area))::json AS geom,
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42 'bottleneck' AS type
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43 FROM waterway.bottlenecks
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44 ORDER BY objnam) r
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45 `
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46 )
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47
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48 var rkmRegex = regexp.MustCompile(
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49 "^[[:space:]]*([0-9]+)([,.]([0-9]))?[[:space:]]*$",
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50 )
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51
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52 func searchFeature(
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53 input interface{},
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54 req *http.Request,
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55 db *sql.Conn,
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56 ) (jr JSONResult, err error) {
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57
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58 s := input.(*models.SearchRequest)
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59
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60 if len(s.SearchString) == 0 {
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61 err = JSONError{http.StatusBadRequest,
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62 "error: empty search string"}
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63 return
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64 }
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65
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66 var result string
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67
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68 m := rkmRegex.FindStringSubmatch(s.SearchString)
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69 if len(m) != 0 {
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70 // Handle search for river kilometre:
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71 var hectometre int
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72 if hectometre, err = strconv.Atoi(m[1]); err != nil {
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73 return
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74 }
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75
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76 hectometre *= 10
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77 if m[3] != "" {
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78 var h int
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79 if h, err = strconv.Atoi(m[3]); err != nil {
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80 return
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81 }
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82 hectometre += h
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83 }
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84
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85 err = db.QueryRowContext(
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86 req.Context(),
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87 searchHectometreSQL,
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88 hectometre,
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89 ).Scan(&result)
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90 } else {
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91 // Hande search for bottlencks:
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92 err = db.QueryRowContext(
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93 req.Context(),
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94 searchMostSQL,
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95 s.SearchString,
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96 ).Scan(&result)
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97 }
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98
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99 if err != nil {
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100 return
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101 }
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102
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103 jr.Result = strings.NewReader(result)
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104 return
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105 }
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106
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107 func listBottlenecks(
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108 _ interface{},
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109 req *http.Request,
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110 conn *sql.Conn,
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111 ) (jr JSONResult, err error) {
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112
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113 var result string
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114 err = conn.QueryRowContext(
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115 req.Context(), listBottlenecksSQL).Scan(&result)
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116
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117 switch {
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118 case err == sql.ErrNoRows:
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119 err = JSONError{
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120 Code: http.StatusNotFound,
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121 Message: "Cannot find any bottleneck.",
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122 }
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123 return
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124 case err != nil:
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125 return
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126 }
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127
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128 jr = JSONResult{Result: strings.NewReader(result)}
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129 return
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130 }