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annotate pkg/controllers/search.go @ 3929:45be361f2d48

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author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 11 Jul 2019 18:54:22 +0200
parents 1504856c9378
children f68529ff47a4
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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 "strings"
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22
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23 "gemma.intevation.de/gemma/pkg/models"
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24 )
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25
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26 const (
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27 searchMostSQL = `SELECT search_most($1)::text`
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28
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29 listBottlenecksSQL = `
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30 SELECT COALESCE(json_agg(r),'[]')
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31 FROM (
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32 SELECT
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33 objnam AS name,
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34 ST_AsGeoJSON(ST_Centroid(area))::json AS geom,
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35 'bottleneck' AS type
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36 FROM waterway.bottlenecks
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37 WHERE validity @> current_timestamp
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38 ORDER BY objnam) r
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39 `
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40 )
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41
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42 var rkmRegex = regexp.MustCompile(
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43 "^[[:space:]]*([0-9]+)([,.]([0-9]))?[[:space:]]*$",
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44 )
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45
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46 func searchFeature(
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47 input interface{},
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48 req *http.Request,
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49 db *sql.Conn,
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50 ) (jr JSONResult, err error) {
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51
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52 s := input.(*models.SearchRequest)
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53
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54 if len(s.SearchString) == 0 {
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55 err = JSONError{http.StatusBadRequest,
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56 "error: empty search string"}
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57 return
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58 }
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59
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60 var result string
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61 err = db.QueryRowContext(
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62 req.Context(),
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63 searchMostSQL,
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64 s.SearchString,
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65 ).Scan(&result)
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66
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67 if err != nil {
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68 return
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69 }
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70
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71 jr.Result = strings.NewReader(result)
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72 return
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73 }
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74
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75 func listBottlenecks(
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76 _ interface{},
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77 req *http.Request,
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78 conn *sql.Conn,
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79 ) (jr JSONResult, err error) {
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80
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81 var result string
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82 err = conn.QueryRowContext(
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83 req.Context(), listBottlenecksSQL).Scan(&result)
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84
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85 switch {
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86 case err == sql.ErrNoRows:
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87 err = JSONError{
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88 Code: http.StatusNotFound,
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89 Message: "Cannot find any bottleneck.",
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90 }
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91 return
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92 case err != nil:
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93 return
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94 }
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95
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96 jr = JSONResult{Result: strings.NewReader(result)}
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97 return
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98 }