1 | <?php |
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2 | /** |
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3 | * BEdita, API-first content management framework |
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4 | * Copyright 2016 ChannelWeb Srl, Chialab Srl |
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5 | * |
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6 | * This file is part of BEdita: you can redistribute it and/or modify |
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7 | * it under the terms of the GNU Lesser General Public License as published |
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8 | * by the Free Software Foundation, either version 3 of the License, or |
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9 | * (at your option) any later version. |
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10 | * |
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11 | * See LICENSE.LGPL or <http://gnu.org/licenses/lgpl-3.0.html> for more details. |
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12 | */ |
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13 | |||
14 | namespace BEdita\Core\Model\Behavior; |
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15 | |||
16 | use Cake\Datasource\EntityInterface; |
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17 | use Cake\Event\Event; |
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18 | use Cake\ORM\Behavior; |
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19 | use Cake\ORM\TableRegistry; |
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20 | use Cake\Utility\Text; |
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21 | |||
22 | /** |
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23 | * UniqueName behavior |
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24 | * |
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25 | * Creates or updates a unique name of objects (see `objects.uname` field). |
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26 | * |
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27 | * Unique name is created tyipically from object title or from other object properties in case of missing title. |
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28 | * An object type may impose custom rule. |
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29 | * Name must be unique inside current project. |
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30 | * |
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31 | * @since 4.0.0 |
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32 | */ |
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33 | class UniqueNameBehavior extends Behavior |
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34 | { |
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35 | /** |
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36 | * Max regenerate iterations to avoid duplicates. |
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37 | * |
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38 | * @var int |
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39 | */ |
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40 | const UNAME_MAX_REGENERATE = 10; |
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41 | |||
42 | /** |
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43 | * Default configuration. |
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44 | * |
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45 | * Possible keys are: |
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46 | * - 'sourceField' field value to use for unique name creation |
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47 | * - 'prefix' constant prefix to use |
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48 | * - 'replacement' character replacement for space |
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49 | * - 'separator' seaparator of `hash` suffix |
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50 | * - 'hashlength' `hash` suffix length |
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51 | * - 'generator' callable function for unique name generation, if set all other keys are ignored |
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52 | * |
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53 | * @var array |
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54 | */ |
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55 | protected $_defaultConfig = [ |
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56 | 'sourceField' => 'title', |
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57 | 'prefix' => '', |
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58 | 'replacement' => '-', |
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59 | 'separator' => '_', |
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60 | 'hashlength' => 6, |
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61 | 'generator' => null, |
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62 | ]; |
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63 | |||
64 | /** |
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65 | * Setup unique name of a BEdita object $entity if a new entity is created |
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66 | * If no custom generator is used unique name is built using a friendly |
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67 | * url `slug` version of a `sourceField` (default 'title') |
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68 | * |
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69 | * @param \Cake\Datasource\EntityInterface $entity The entity to save |
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70 | * @return void |
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71 | */ |
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72 | public function uniqueName(EntityInterface $entity) |
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73 | { |
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74 | $uname = $entity->get('uname'); |
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75 | if (empty($uname)) { |
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76 | $uname = $this->generateUniqueName($entity); |
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77 | } |
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78 | $count = 0; |
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79 | while ($this->uniqueNameExists($uname, $entity->get('id')) |
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80 | && ($count++ < self::UNAME_MAX_REGENERATE)) { |
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81 | $uname = $this->generateUniqueName($entity, true); |
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82 | } |
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83 | |||
84 | $entity->set('uname', $uname); |
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85 | } |
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86 | |||
87 | /** |
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88 | * Generate unique name string from $config parameters. |
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89 | * If $regenerate parameter is true, random hash is added to uname string. |
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90 | * A 'callable' item is called if set in config('generator') instead of generateUniqueName(...) |
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91 | * |
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92 | * @param \Cake\Datasource\EntityInterface $entity The entity to save |
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93 | * @param bool $regenerate if true it adds hash string to uname |
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94 | * @param array $cfg Optional config parameters to override defaults |
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95 | * @return string uname |
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96 | */ |
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97 | public function generateUniqueName(EntityInterface $entity, $regenerate = false, array $cfg = []) |
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98 | { |
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99 | $config = array_merge($this->getConfig(), $cfg); |
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100 | $generator = $config['generator']; |
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101 | if (is_callable($generator)) { |
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102 | return $generator($entity, $regenerate); |
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103 | } |
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104 | $fieldValue = $entity->get($config['sourceField']); |
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105 | if (empty($fieldValue)) { |
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106 | $fieldValue = (string)$entity->get('type'); |
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107 | $regenerate = true; |
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108 | } |
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109 | |||
110 | return $this->uniqueNameFromValue($fieldValue, $regenerate); |
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111 | } |
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112 | |||
113 | /** |
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114 | * Generate unique name string from $config parameters. |
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115 | * If $regenerate parameter is true, random hash is added to uname string. |
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116 | * |
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117 | * @param string $value String to use in unique name creation |
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118 | * @param bool $regenerate if true it adds hash string to uname |
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119 | * @param array $cfg parameters to create unique name |
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120 | * @return string uname |
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121 | */ |
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122 | public function uniqueNameFromValue($value, $regenerate = false, array $cfg = []) |
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123 | { |
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124 | $config = array_merge($this->getConfig(), $cfg); |
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125 | $uname = $config['prefix'] . Text::slug($value, $config['replacement']); |
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126 | if ($regenerate) { |
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127 | $hash = Text::uuid(); |
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128 | $hash = str_replace('-', '', $hash); |
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129 | if (!empty($config['hashlength'])) { |
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130 | $hash = substr($hash, 0, $config['hashlength']); |
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131 | } |
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132 | $uname .= $config['separator'] . $hash; |
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133 | } |
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134 | |||
135 | return strtolower($uname); |
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136 | } |
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137 | |||
138 | /** |
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139 | * Verify $uname is unique |
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140 | * |
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141 | * @param string $uname to check |
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142 | * @param int $id object id to exclude from check |
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143 | * @return bool |
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144 | */ |
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145 | public function uniqueNameExists($uname, $id = null) |
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146 | { |
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147 | $options = ['uname' => $uname]; |
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148 | if (!empty($id)) { |
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149 | $options['id <>'] = $id; |
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150 | } |
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151 | |||
152 | return TableRegistry::get('Objects')->exists($options); |
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153 | } |
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154 | |||
155 | /** |
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156 | * Setup unique name for a BEdita object represented by $entity |
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157 | * through `uniqueName()` method |
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158 | * |
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159 | * @param \Cake\Event\Event $event The event dispatched |
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160 | * @param \Cake\Datasource\EntityInterface $entity The entity to save |
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161 | * @return void |
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162 | */ |
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163 | public function beforeSave(Event $event, EntityInterface $entity) |
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164 | { |
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165 | $this->uniqueName($entity); |
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166 | } |
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167 | } |
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168 |
This check looks for parameters that have been defined for a function or method, but which are not used in the method body.