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annotate pkg/geoserver/templates.go @ 3972:72473ebd9d64

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Bufferd kill signal channel to not miss signals if recieving code is not ready.
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 17 Jul 2019 11:26:36 +0200
parents 3fcc4e11fc00
children 8aff98c84a5a
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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) 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 // * Markus Kottländer <markus.kottlaender@intevation.de>
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14
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15 package geoserver
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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 "strings"
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21 "text/template"
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22
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23 "gemma.intevation.de/gemma/pkg/auth"
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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 selectClassBreaksSQL = `
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29 SELECT config_val FROM sys_admin.system_config
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30 WHERE config_key = $1`
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31 )
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32
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33 func init() {
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34 RegisterStylePreprocessor(
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35 "sounding_results_contour_lines_geoserver",
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36 templateContourLinesFunc("morphology_classbreaks"))
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37 RegisterStylePreprocessor(
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38 "sounding_differences",
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39 templateContourLinesFunc("morphology_classbreaks_compare"))
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40 }
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41
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42 func templateContourLinesFunc(configKey string) func(string) (string, error) {
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43 return func(data string) (string, error) {
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44 return templateContourLines(data, configKey)
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45 }
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46 }
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47
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48 func templateContourLines(data, configKey string) (string, error) {
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49 tmpl, err := template.New("template").Parse(data)
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50 if err != nil {
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51 return "", err
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52 }
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53
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54 var cb []models.ClassBreak
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55
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56 if cb, err = countourLinesClassBreaks(configKey); err != nil {
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57 return "", err
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58 }
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59
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60 var buf strings.Builder
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61 if err = tmpl.Execute(&buf, cb); err != nil {
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62 return "", err
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63 }
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64 return buf.String(), nil
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65 }
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66
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67 func countourLinesClassBreaks(configKey string) ([]models.ClassBreak, error) {
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68
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69 var config string
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70 ctx := context.Background()
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71 if err := auth.RunAs(
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72 ctx,
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73 "sys_admin",
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74 func(conn *sql.Conn) error {
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75 return conn.QueryRowContext(
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76 ctx,
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77 selectClassBreaksSQL,
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78 configKey,
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79 ).Scan(&config)
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80 },
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81 ); err != nil {
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82 return nil, err
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83 }
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84
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85 cc, err := models.ParseColorValues(config)
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86 if err != nil {
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87 return nil, err
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88 }
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89
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90 return cc.ClassBreaks(), nil
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91 }