Mercurial > gemma
annotate pkg/geoserver/templates.go @ 4423:f42c6efd76fe
Waterlevel: only generate csvFilename when dates are present
author | Thomas Junk <thomas.junk@intevation.de> |
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date | Wed, 18 Sep 2019 15:37:42 +0200 |
parents | 124a5a7fe8d6 |
children | 4c56682f83f7 |
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_contour_lines_geoserver", |
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39 templateContourLinesFunc("morphology_classbreaks")) |
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40 RegisterStylePreprocessor( |
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41 "sounding_differences", |
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42 templateContourLinesFunc("morphology_classbreaks_compare")) |
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43 RegisterStylePreprocessor( |
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44 "distance_marks_geoserver", |
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45 templateConfigValues) |
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46 RegisterStylePreprocessor( |
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47 "distance_marks_ashore_geoserver", |
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48 templateConfigValues) |
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49 RegisterStylePreprocessor( |
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50 "waterway_area", |
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51 templateConfigValues) |
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52 RegisterStylePreprocessor( |
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53 "waterway_axis", |
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54 templateConfigValues) |
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55 // TODO: Add more layers. |
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56 } |
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57 |
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58 func templateConfigValues(tmplTxt string) (string, error) { |
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59 // As SLDs cannot handle opacity as hex part of the color setting |
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60 // we split out the 7-8 chars of keys ending on "_fill" color settings |
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61 // into keys ending on "_fill_opacity" |
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62 tmpl, err := template.New("template").Parse(tmplTxt) |
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63 if err != nil { |
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64 return "", err |
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65 } |
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66 |
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67 // Try to extract the needed keys from the template. |
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68 keys := extractKeysFromTemplate(tmplTxt) |
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69 |
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70 // filter out keys ending on "_opacity" and put them in their own slice |
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71 var opacityKeys []string |
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72 n := 0 |
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73 for _, key := range keys { |
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74 if strings.HasSuffix(key, "_opacity") { |
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75 opacityKeys = append(opacityKeys, key) |
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76 } else { |
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77 keys[n] = key |
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78 n++ |
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79 } |
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80 } |
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81 keys = keys[:n] |
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82 |
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83 kv, err := loadConfigValues(keys) |
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84 if err != nil { |
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85 return "", err |
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86 } |
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87 |
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88 // if there convert opacity hex value into float between 0-1 |
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89 // otherwise just use 1.0 |
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90 for _, opacityKey := range opacityKeys { |
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91 fillKey := opacityKey[0 : len(opacityKey)-8] |
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92 fillValue := kv[fillKey] |
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93 if fillValue != "" && len(fillValue) == 9 { |
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94 opacity, err := strconv.ParseInt(fillValue[7:9], 16, 0) |
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95 if err == nil { |
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96 kv[opacityKey] = strconv.FormatFloat( |
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97 float64(opacity)/255, 'f', 2, 64) |
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98 kv[fillKey] = kv[fillKey][0:7] |
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99 } else { |
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100 return "", err |
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101 } |
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102 |
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103 } else { |
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104 kv[opacityKey] = "1.0" |
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105 } |
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106 } |
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107 |
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108 var buf strings.Builder |
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109 if err = tmpl.Execute(&buf, kv); err != nil { |
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110 return "", err |
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111 } |
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112 return buf.String(), nil |
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113 |
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114 } |
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115 |
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116 // TODO: Use the parse tree of the template to extract keys. |
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117 var findKeysRe = regexp.MustCompile(`{{[-]?\s*\.([^-.\s]+)\s*[-]?}}`) |
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118 |
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119 func extractKeysFromTemplate(tmpl string) []string { |
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120 parts := findKeysRe.FindAllStringSubmatch(tmpl, -1) |
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121 keys := make(map[string]struct{}) |
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122 for _, part := range parts { |
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123 keys[part[1]] = struct{}{} |
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124 } |
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125 out := make([]string, len(keys)) |
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126 var i int |
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127 for key := range keys { |
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128 out[i] = key |
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129 i++ |
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130 } |
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131 return out |
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132 } |
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133 |
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134 func loadConfigValues(keys []string) (map[string]string, error) { |
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135 kv := make(map[string]string, len(keys)) |
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136 if len(keys) == 0 { |
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137 return kv, nil |
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138 } |
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139 ctx := context.Background() |
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140 if err := auth.RunAs( |
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141 ctx, |
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142 "sys_admin", |
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143 func(conn *sql.Conn) error { |
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144 stmt, err := conn.PrepareContext(ctx, selectConfigValSQL) |
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145 if err != nil { |
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146 return err |
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147 } |
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148 defer stmt.Close() |
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149 for _, key := range keys { |
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150 var val string |
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151 if err := stmt.QueryRowContext(ctx, key).Scan(&val); err != nil { |
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152 return err |
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153 } |
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154 kv[key] = val |
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155 } |
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156 return nil |
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157 }, |
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158 ); err != nil { |
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159 return nil, err |
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160 } |
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161 |
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162 return kv, nil |
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163 } |
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164 |
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165 func templateContourLinesFunc(configKey string) func(string) (string, error) { |
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166 return func(data string) (string, error) { |
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167 return templateContourLines(data, configKey) |
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168 } |
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169 } |
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170 |
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171 func templateContourLines(data, configKey string) (string, error) { |
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172 tmpl, err := template.New("template").Parse(data) |
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173 if err != nil { |
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174 return "", err |
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175 } |
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176 |
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177 var cb []models.ClassBreak |
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178 |
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179 if cb, err = countourLinesClassBreaks(configKey); err != nil { |
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180 return "", err |
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181 } |
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182 |
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183 var buf strings.Builder |
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184 if err = tmpl.Execute(&buf, cb); err != nil { |
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185 return "", err |
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186 } |
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187 return buf.String(), nil |
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188 } |
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189 |
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190 func countourLinesClassBreaks(configKey string) ([]models.ClassBreak, error) { |
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191 |
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192 var config string |
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193 ctx := context.Background() |
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194 if err := auth.RunAs( |
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195 ctx, |
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196 "sys_admin", |
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197 func(conn *sql.Conn) error { |
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198 return conn.QueryRowContext( |
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199 ctx, |
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200 selectConfigValSQL, |
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201 configKey, |
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202 ).Scan(&config) |
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203 }, |
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204 ); err != nil { |
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205 return nil, err |
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206 } |
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207 |
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208 cc, err := models.ParseColorValues(config) |
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209 if err != nil { |
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210 return nil, err |
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211 } |
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212 |
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213 return cc.ClassBreaks(), nil |
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214 } |