Mercurial > gemma

annotate pkg/controllers/surveys.go @ 4244:4394daeea96a json-handler-middleware

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Moved JSONHandler into middleware package.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 22 Aug 2019 11:26:48 +0200
parents d776110b4db0
children fc082c611b8b
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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 Wilde <sascha.wilde@intevation.de>
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13 // * Sascha L. Teichmann <sascha.teichmann@intevation.de>
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14 // * Bernhard Reiter <bernhard.reiter@intevation.de>
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15
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16 package controllers
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17
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18 import (
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19 "database/sql"
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20 "net/http"
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21
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22 "github.com/gorilla/mux"
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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 mw "gemma.intevation.de/gemma/pkg/middleware"
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27 )
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28
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29 const (
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30 listSurveysSQL = `
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31 SELECT
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32 s.bottleneck_id,
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33 s.date_info::text,
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34 s.depth_reference,
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35 g.objname AS gauge_objname,
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36 r.value AS waterlevel_value
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37 FROM waterway.bottlenecks AS b
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38 JOIN waterway.sounding_results AS s ON b.bottleneck_id = s.bottleneck_id
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39 JOIN waterway.gauges AS g
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40 ON b.gauge_location = g.location AND s.date_info::timestamptz <@ g.validity
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41 LEFT JOIN waterway.gauges_reference_water_levels AS r
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42 ON s.depth_reference = r.depth_reference
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43 AND g.location = r.location AND g.validity = r.validity
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44 WHERE b.objnam = $1 AND s.date_info::timestamptz <@ b.validity`
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45 )
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46
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47 func listSurveys(req *http.Request) (jr mw.JSONResult, err error) {
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48
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49 bottleneckName := mux.Vars(req)["bottleneck"]
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50
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51 var rows *sql.Rows
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52
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53 rows, err = mw.JSONConn(req).QueryContext(req.Context(), listSurveysSQL, bottleneckName)
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54 if err != nil {
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55 return
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56 }
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57 defer rows.Close()
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58
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59 surveys := []*models.Survey{}
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60
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61 // as we do not use the values here, we could simply the code here
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62 // to work without an explicit mdels/surverys.go
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63 // (like done in controllers/search.go)
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64 for rows.Next() {
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65 var survey models.Survey
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66 var level sql.NullInt64
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67 if err = rows.Scan(
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68 &survey.BottleneckID,
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69 &survey.DateInfo,
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70 &survey.DepthReference,
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71 &survey.ReferenceGauge,
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72 &level,
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73 ); err != nil {
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74 return
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75 }
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76 if level.Valid {
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77 survey.WaterLevelValue = &level.Int64
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78 }
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79 surveys = append(surveys, &survey)
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80 }
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81
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82 if err = rows.Err(); err != nil {
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83 return
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84 }
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85
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86 jr = mw.JSONResult{
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87 Result: struct {
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88 Surveys []*models.Survey `json:"surveys"`
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89 }{surveys},
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90 }
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91 return
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92 }