src/main/kotlin/de/uapcore/lightpit/RequestMapping.kt

Sat, 06 Jan 2024 20:31:14 +0100

author
Mike Becker <universe@uap-core.de>
date
Sat, 06 Jan 2024 20:31:14 +0100
changeset 298
1275eb652008
parent 292
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child 311
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permissions
-rw-r--r--

add language selection cookie - fixes #352

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1 /*
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2 * Copyright 2021 Mike Becker. All rights reserved.
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3 *
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4 * Redistribution and use in source and binary forms, with or without
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5 * modification, are permitted provided that the following conditions are met:
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6 *
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7 * 1. Redistributions of source code must retain the above copyright
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8 * notice, this list of conditions and the following disclaimer.
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9 *
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10 * 2. Redistributions in binary form must reproduce the above copyright
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11 * notice, this list of conditions and the following disclaimer in the
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12 * documentation and/or other materials provided with the distribution.
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13 *
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14 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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15 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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17 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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20 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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21 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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22 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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24 */
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25
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26 package de.uapcore.lightpit
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27
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28 import de.uapcore.lightpit.dao.DataAccessObject
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29 import de.uapcore.lightpit.entities.HasNode
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30 import de.uapcore.lightpit.viewmodel.NavMenu
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31 import de.uapcore.lightpit.viewmodel.View
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32 import jakarta.servlet.http.HttpServletRequest
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33 import jakarta.servlet.http.HttpServletResponse
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34 import jakarta.servlet.http.HttpSession
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35 import java.util.*
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36 import kotlin.math.min
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37 import java.sql.Date as SqlDate
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38
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39 typealias MappingMethod = (HttpRequest, DataAccessObject) -> Unit
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40 typealias PathParameters = Map<String, String>
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41
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42 sealed class OptionalPathInfo<in T : HasNode>(info: T) {
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43 class Specific<T: HasNode>(val elem: T) : OptionalPathInfo<T>(elem)
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44 data object All : OptionalPathInfo<HasNode>(object : HasNode { override val node = "-"})
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45 data object None : OptionalPathInfo<HasNode>(object : HasNode { override val node = "~"})
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46 data object NotFound : OptionalPathInfo<HasNode>(object : HasNode { override val node = ""})
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47 val node = info.node
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48 }
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49
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50 sealed interface ValidationResult<T>
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51 class ValidationError<T>(val message: String): ValidationResult<T>
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52 class ValidatedValue<T>(val result: T): ValidationResult<T>
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53
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54 class HttpRequest(
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55 val request: HttpServletRequest,
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56 val response: HttpServletResponse,
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57 val pathParams: PathParameters = emptyMap()
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58 ) {
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59 val session: HttpSession = request.session
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60
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61 val remoteUser: String? = request.remoteUser
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62
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63 /**
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64 * The name of the content page.
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65 *
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66 * @see Constants#REQ_ATTR_CONTENT_PAGE
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67 */
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68 var contentPage = ""
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69 set(value) {
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70 field = value
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71 request.setAttribute(Constants.REQ_ATTR_CONTENT_PAGE, jspPath(value))
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72 }
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73
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74 /**
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75 * The name of the content page.
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76 *
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77 * @see Constants#REQ_ATTR_PAGE_TITLE
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78 */
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79 var pageTitle = ""
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80 set(value) {
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81 field = value
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82 request.setAttribute(Constants.REQ_ATTR_PAGE_TITLE, value)
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83 }
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84
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85 /**
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86 * A list of additional style sheets.
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87 *
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88 * @see Constants#REQ_ATTR_STYLESHEET
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89 */
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90 var styleSheets = emptyList<String>()
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91 set(value) {
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92 field = value
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93 request.setAttribute(Constants.REQ_ATTR_STYLESHEET,
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94 value.map { it.withExt(".css") }
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95 )
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96 }
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97
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98 /**
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99 * A list of additional style sheets.
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100 *
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101 * @see Constants#REQ_ATTR_JAVASCRIPT
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102 */
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103 var javascript = ""
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104 set(value) {
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105 field = value
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106 request.setAttribute(Constants.REQ_ATTR_JAVASCRIPT,
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107 value.withExt(".js")
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108 )
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109 }
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110
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111 /**
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112 * The name of the navigation menu JSP.
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113 *
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114 * @see Constants#REQ_ATTR_NAVIGATION
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115 */
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116 var navigationMenu: NavMenu? = null
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117 set(value) {
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118 field = value
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119 request.setAttribute(Constants.REQ_ATTR_NAVIGATION, navigationMenu)
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120 }
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121
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122 var redirectLocation: String? = null
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123 set(value) {
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124 field = value
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125 if (value == null) {
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126 request.removeAttribute(Constants.REQ_ATTR_REDIRECT_LOCATION)
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127 } else {
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128 request.setAttribute(Constants.REQ_ATTR_REDIRECT_LOCATION, baseHref + value)
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129 }
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130 }
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131
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132 var feedPath: String? = null
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133 set(value) {
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134 field = value
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135 if (value == null) {
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136 request.removeAttribute(Constants.REQ_ATTR_FEED_HREF)
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137 } else {
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138 request.setAttribute(Constants.REQ_ATTR_FEED_HREF, baseHref + value)
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139 }
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140 }
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141
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142 /**
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143 * The view object.
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144 *
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145 * @see Constants#REQ_ATTR_VIEWMODEL
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146 */
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147 var view: View? = null
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148 set(value) {
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149 field = value
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150 request.setAttribute(Constants.REQ_ATTR_VIEWMODEL, value)
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151 }
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152
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153 /**
198
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154 * Additional port info, if necessary.
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155 */
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156 private val portInfo =
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157 if ((request.scheme == "http" && request.serverPort == 80)
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158 || (request.scheme == "https" && request.serverPort == 443)
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159 ) "" else ":${request.serverPort}"
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160
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161 /**
184
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162 * The base path of this application.
179
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163 */
198
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164 val baseHref get() = "${request.scheme}://${request.serverName}$portInfo${request.contextPath}/"
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165
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166 private fun String.withExt(ext: String) = if (endsWith(ext)) this else plus(ext)
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167 private fun jspPath(name: String) = Constants.JSP_PATH_PREFIX.plus(name).withExt(".jsp")
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168
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169 fun param(name: String): String? = request.getParameter(name)
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170 fun paramArray(name: String): Array<String> = request.getParameterValues(name) ?: emptyArray()
179
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171
210
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172 fun <T> param(name: String, validator: (String?) -> (ValidationResult<T>),
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173 defaultValue: T, errorMessages: MutableList<String>): T {
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174 return when (val result = validator(param(name))) {
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175 is ValidationError -> {
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176 errorMessages.add(i18n(result.message))
210
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177 defaultValue
209
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178 }
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179 is ValidatedValue -> {
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180 result.result
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181 }
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182 }
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183 }
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184
292
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185
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186 fun <T : HasNode> lookupPathParam(paramName: String, list: List<T>): OptionalPathInfo<T> {
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187 return when (val node = this.pathParams[paramName]) {
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188 null -> OptionalPathInfo.All
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189 "-" -> OptionalPathInfo.All
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190 "~" -> OptionalPathInfo.None
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191 else -> list.find { it.node == node }
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192 ?.let { OptionalPathInfo.Specific(it) }
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193 ?: OptionalPathInfo.NotFound
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194 }
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195 }
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196
284
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197 val body: String by lazy {
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198 request.reader.lineSequence().joinToString("\n")
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199 }
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200
198
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201 private fun forward(jsp: String) {
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202 request.getRequestDispatcher(jspPath(jsp)).forward(request, response)
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203 }
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204
198
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205 fun renderFeed(page: String? = null) {
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206 page?.let { contentPage = it }
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207 forward("feed")
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208 }
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209
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210 fun render(page: String? = null) {
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211 page?.let { contentPage = it }
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212 forward("site")
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213 }
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214
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215 fun renderCommit(location: String? = null) {
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216 location?.let { redirectLocation = it }
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217 contentPage = Constants.JSP_COMMIT_SUCCESSFUL
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218 render()
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219 }
205
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220
260
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221 fun i18n(key: String): String = ResourceBundle.getBundle("localization/strings", response.locale).getString(key)
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222 }
179
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223
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224 /**
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225 * A path pattern optionally containing placeholders.
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226 *
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227 * The special directories . and .. are disallowed in the pattern.
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228 * Placeholders start with a % sign.
179
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229 *
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230 * @param pattern the pattern
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231 */
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232 class PathPattern(pattern: String) {
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233 private val nodePatterns: List<String>
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234 private val collection: Boolean
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235
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236 private fun parse(pattern: String): List<String> {
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237 val nodes = pattern.split("/").filter { it.isNotBlank() }.toList()
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238 require(nodes.none { it == "." || it == ".." }) { "Path must not contain '.' or '..' nodes." }
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239 return nodes
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240 }
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241
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242 /**
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243 * Matches a path against this pattern.
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244 * The path must be canonical in the sense that no . or .. parts occur.
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245 *
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246 * @param path the path to match
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247 * @return true if the path matches the pattern, false otherwise
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248 */
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249 fun matches(path: String): Boolean {
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250 if (collection xor path.endsWith("/")) return false
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251 val nodes = parse(path)
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252 if (nodePatterns.size != nodes.size) return false
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253 for (i in nodePatterns.indices) {
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254 val pattern = nodePatterns[i]
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255 val node = nodes[i]
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256 if (pattern.startsWith("%")) continue
179
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257 if (pattern != node) return false
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258 }
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259 return true
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260 }
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261
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262 /**
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263 * Returns the path parameters found in the specified path using this pattern.
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264 * The return value of this method is undefined, if the patter does not match.
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265 *
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266 * @param path the path
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267 * @return the path parameters, if any, or an empty map
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268 * @see .matches
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269 */
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270 fun obtainPathParameters(path: String): PathParameters {
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271 val params = mutableMapOf<String, String>()
179
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272 val nodes = parse(path)
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273 for (i in 0 until min(nodes.size, nodePatterns.size)) {
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274 val pattern = nodePatterns[i]
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275 val node = nodes[i]
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276 if (pattern.startsWith("%")) {
179
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277 params[pattern.substring(1)] = node
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278 }
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279 }
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280 return params
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281 }
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282
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283 override fun hashCode(): Int {
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284 val str = StringBuilder()
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285 for (node in nodePatterns) {
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286 if (node.startsWith("%")) {
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287 str.append("/%")
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288 } else {
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289 str.append('/')
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290 str.append(node)
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291 }
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292 }
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293 if (collection) str.append('/')
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294 return str.toString().hashCode()
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295 }
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296
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297 override fun equals(other: Any?): Boolean {
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298 if (other is PathPattern) {
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299 if (collection xor other.collection || nodePatterns.size != other.nodePatterns.size) return false
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300 for (i in nodePatterns.indices) {
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301 val left = nodePatterns[i]
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302 val right = other.nodePatterns[i]
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303 if (left.startsWith("%") && right.startsWith("%")) continue
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304 if (left != right) return false
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305 }
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306 return true
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307 } else {
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308 return false
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309 }
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310 }
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311
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312 init {
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313 nodePatterns = parse(pattern)
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314 collection = pattern.endsWith("/")
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315 }
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316 }
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317
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318 // <editor-fold desc="Validators">
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319
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320 fun dateOptValidator(input: String?): ValidationResult<SqlDate?> {
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321 return if (input.isNullOrBlank()) {
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322 ValidatedValue(null)
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323 } else {
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324 try {
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325 ValidatedValue(SqlDate.valueOf(input))
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326 } catch (ignored: IllegalArgumentException) {
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327 ValidationError("validation.date.format")
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328 }
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329 }
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330 }
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331
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332 fun boolValidator(input: String?): ValidationResult<Boolean> {
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333 return if (input.isNullOrBlank()) {
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334 ValidatedValue(false)
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335 } else {
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336 ValidatedValue(!(input.equals("false", true) || input == "0"))
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337 }
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338 }
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339
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340 // </editor-fold>

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