Mercurial > gemma

annotate pkg/geoserver/templates.go @ 5694:3bc15e38c7e8 sr-v2

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Typo fix
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 12 Feb 2024 14:43:31 +0100
parents 24156a964eaa
children
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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) 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 // * Bernhard Reiter <bernhard.reiter@intevation.de>
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15
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16 package geoserver
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17
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18 import (
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19 "context"
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20 "database/sql"
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21 "regexp"
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22 "strconv"
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23 "strings"
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24 "text/template"
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25
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26 "gemma.intevation.de/gemma/pkg/auth"
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27 "gemma.intevation.de/gemma/pkg/models"
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28 )
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29
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30 const (
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31 selectConfigValSQL = `
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32 SELECT config_val FROM sys_admin.system_config
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33 WHERE config_key = $1`
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34 )
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35
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36 func init() {
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37 RegisterStylePreprocessor(
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38 "sounding_results_areas_geoserver",
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39 templateContourLinesFunc("morphology_classbreaks"))
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40 RegisterStylePreprocessor(
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41 "sounding_results_marking_points_geoserver",
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42 templateContourLinesFunc("morphology_classbreaks"))
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43 RegisterStylePreprocessor(
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44 "sounding_differences",
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45 templateContourLinesFunc("morphology_classbreaks_compare"))
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46 RegisterStylePreprocessor(
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47 "distance_marks_geoserver",
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48 templateConfigValues)
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49 RegisterStylePreprocessor(
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50 "distance_marks_ashore_geoserver",
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51 templateConfigValues)
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52 RegisterStylePreprocessor(
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53 "waterway_area",
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54 templateConfigValues)
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55 RegisterStylePreprocessor(
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56 "waterway_axis",
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57 templateConfigValues)
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58 // TODO: Add more layers.
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59 }
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60
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61 func templateConfigValues(tmplTxt string) (string, error) {
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62 // As SLDs cannot handle opacity as hex part of the color setting
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63 // we split out the 7-8 chars of keys ending on "_fill" color settings
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64 // into keys ending on "_fill_opacity"
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65 tmpl, err := template.New("template").Parse(tmplTxt)
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66 if err != nil {
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67 return "", err
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68 }
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69
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70 // Try to extract the needed keys from the template.
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71 keys := extractKeysFromTemplate(tmplTxt)
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72
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73 // filter out keys ending on "_opacity" and put them in their own slice
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74 var opacityKeys []string
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75 n := 0
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76 for _, key := range keys {
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77 if strings.HasSuffix(key, "_opacity") {
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78 opacityKeys = append(opacityKeys, key)
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79 } else {
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80 keys[n] = key
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81 n++
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82 }
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83 }
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84 keys = keys[:n]
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85
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86 kv, err := loadConfigValues(keys)
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87 if err != nil {
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88 return "", err
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89 }
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90
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91 // if there convert opacity hex value into float between 0-1
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92 // otherwise just use 1.0
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93 for _, opacityKey := range opacityKeys {
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94 fillKey := opacityKey[0 : len(opacityKey)-8]
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95 fillValue := kv[fillKey]
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96 if fillValue != "" && len(fillValue) == 9 {
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97 opacity, err := strconv.ParseInt(fillValue[7:9], 16, 0)
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98 if err == nil {
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99 kv[opacityKey] = strconv.FormatFloat(
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100 float64(opacity)/255, 'f', 2, 64)
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101 kv[fillKey] = kv[fillKey][0:7]
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102 } else {
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103 return "", err
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104 }
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105
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106 } else {
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107 kv[opacityKey] = "1.0"
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108 }
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109 }
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110
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111 var buf strings.Builder
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112 if err = tmpl.Execute(&buf, kv); err != nil {
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113 return "", err
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114 }
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115 return buf.String(), nil
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116
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117 }
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118
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119 // TODO: Use the parse tree of the template to extract keys.
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120 var findKeysRe = regexp.MustCompile(`{{[-]?\s*\.([^-.\s]+)\s*[-]?}}`)
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121
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122 func extractKeysFromTemplate(tmpl string) []string {
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123 parts := findKeysRe.FindAllStringSubmatch(tmpl, -1)
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124 keys := make(map[string]struct{})
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125 for _, part := range parts {
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126 keys[part[1]] = struct{}{}
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127 }
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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128 out := make([]string, len(keys))
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129 var i int
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130 for key := range keys {
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131 out[i] = key
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132 i++
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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133 }
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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134 return out
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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135 }
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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136
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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137 func loadConfigValues(keys []string) (map[string]string, error) {
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
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138 kv := make(map[string]string, len(keys))
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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139 if len(keys) == 0 {
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140 return kv, nil
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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141 }
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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142 ctx := context.Background()
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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143 if err := auth.RunAs(
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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144 ctx,
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
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parents: 3854
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145 "sys_admin",
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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146 func(conn *sql.Conn) error {
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
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147 stmt, err := conn.PrepareContext(ctx, selectConfigValSQL)
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
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parents: 3854
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148 if err != nil {
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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149 return err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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150 }
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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151 defer stmt.Close()
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152 for _, key := range keys {
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153 var val string
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154 if err := stmt.QueryRowContext(ctx, key).Scan(&val); err != nil {
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
diff changeset
155 return err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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156 }
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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157 kv[key] = val
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158 }
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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159 return nil
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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160 },
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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161 ); err != nil {
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
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162 return nil, err
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
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163 }
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
diff changeset
164
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
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165 return kv, nil
3828
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166 }
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167
3831
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168 func templateContourLinesFunc(configKey string) func(string) (string, error) {
0ffea636d6b0 Prepared class break templating mechanism to work with differences, too. Needs an adjusted template.
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169 return func(data string) (string, error) {
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170 return templateContourLines(data, configKey)
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171 }
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172 }
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173
0ffea636d6b0 Prepared class break templating mechanism to work with differences, too. Needs an adjusted template.
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174 func templateContourLines(data, configKey string) (string, error) {
3828
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175 tmpl, err := template.New("template").Parse(data)
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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176 if err != nil {
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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177 return "", err
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178 }
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179
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180 var cb []models.ClassBreak
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181
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182 if cb, err = countourLinesClassBreaks(configKey); err != nil {
3828
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183 return "", err
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184 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
185
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186 var buf strings.Builder
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
187 if err = tmpl.Execute(&buf, cb); err != nil {
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188 return "", err
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
189 }
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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190 return buf.String(), nil
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
191 }
885eb90255ff Cleanup templating of styles [WIP].
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192
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3831
diff changeset
193 func countourLinesClassBreaks(configKey string) ([]models.ClassBreak, error) {
3828
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194
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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195 var config string
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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196 ctx := context.Background()
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
197 if err := auth.RunAs(
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
198 ctx,
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
199 "sys_admin",
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
200 func(conn *sql.Conn) error {
3831
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3830
diff changeset
201 return conn.QueryRowContext(
0ffea636d6b0 Prepared class break templating mechanism to work with differences, too. Needs an adjusted template.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3830
diff changeset
202 ctx,
4232
8aff98c84a5a Example how to style distance_marks WMS layer with templating.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3854
diff changeset
203 selectConfigValSQL,
3831
0ffea636d6b0 Prepared class break templating mechanism to work with differences, too. Needs an adjusted template.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3830
diff changeset
204 configKey,
0ffea636d6b0 Prepared class break templating mechanism to work with differences, too. Needs an adjusted template.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3830
diff changeset
205 ).Scan(&config)
3828
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
206 },
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
207 ); err != nil {
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
208 return nil, err
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
209 }
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
210
3854
3fcc4e11fc00 Validate the config values of the morpho classes when saving. Also don't trigger the expensive re-calculation of the contour lines if only the colors changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3831
diff changeset
211 cc, err := models.ParseColorValues(config)
3828
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
212 if err != nil {
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
213 return nil, err
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
214 }
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
215
3854
3fcc4e11fc00 Validate the config values of the morpho classes when saving. Also don't trigger the expensive re-calculation of the contour lines if only the colors changed.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3831
diff changeset
216 return cc.ClassBreaks(), nil
3828
885eb90255ff Cleanup templating of styles [WIP].
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 3826
diff changeset
217 }