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1 | <?php |
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2 | |||
3 | declare(strict_types=1); |
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4 | |||
5 | /* |
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6 | * This file is part of the Sonata Project package. |
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7 | * |
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8 | * (c) Thomas Rabaix <[email protected]> |
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9 | * |
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10 | * For the full copyright and license information, please view the LICENSE |
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11 | * file that was distributed with this source code. |
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12 | */ |
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13 | |||
14 | namespace Sonata\AdminBundle\Datagrid; |
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15 | |||
16 | /** |
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17 | * @author Fabien Potencier <[email protected]> |
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18 | * @author Thomas Rabaix <[email protected]> |
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19 | * |
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20 | * @implements \Iterator<object> |
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21 | */ |
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22 | abstract class Pager implements \Iterator, \Countable, \Serializable, PagerInterface |
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23 | { |
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24 | public const TYPE_DEFAULT = 'default'; |
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25 | public const TYPE_SIMPLE = 'simple'; |
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26 | |||
27 | /** |
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28 | * @var int |
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29 | */ |
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30 | protected $page = 1; |
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31 | |||
32 | /** |
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33 | * @var int |
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34 | */ |
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35 | protected $maxPerPage = 0; |
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36 | |||
37 | /** |
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38 | * @var int |
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39 | */ |
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40 | protected $lastPage = 1; |
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41 | |||
42 | /** |
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43 | * @var int |
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44 | */ |
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45 | protected $nbResults = 0; |
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46 | |||
47 | /** |
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48 | * @var int |
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49 | */ |
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50 | protected $cursor = 1; |
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51 | |||
52 | /** |
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53 | * @var array<string, mixed> |
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54 | */ |
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55 | protected $parameters = []; |
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56 | |||
57 | /** |
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58 | * @var int |
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59 | */ |
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60 | protected $currentMaxLink = 1; |
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61 | |||
62 | /** |
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63 | * @var int|false |
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64 | */ |
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65 | protected $maxRecordLimit = false; |
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66 | |||
67 | /** |
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68 | * @var int |
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69 | */ |
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70 | protected $maxPageLinks = 0; |
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71 | |||
72 | /** |
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73 | * Results are null prior to its initialization in `initializeIterator()`. |
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74 | * |
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75 | * @var object[]|null |
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76 | */ |
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77 | protected $results; |
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78 | |||
79 | /** |
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80 | * @var int |
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81 | */ |
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82 | protected $resultsCounter = 0; |
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83 | |||
84 | /** |
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85 | * @var ProxyQueryInterface|null |
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86 | */ |
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87 | protected $query; |
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88 | |||
89 | /** |
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90 | * @var string[] |
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91 | */ |
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92 | protected $countColumn = ['id']; |
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93 | |||
94 | /** |
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95 | * @param int $maxPerPage Number of records to display per page |
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96 | */ |
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97 | public function __construct(int $maxPerPage = 10) |
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98 | { |
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99 | $this->setMaxPerPage($maxPerPage); |
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100 | } |
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101 | |||
102 | /** |
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103 | * Returns the current pager's max link. |
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104 | */ |
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105 | public function getCurrentMaxLink(): int |
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106 | { |
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107 | return $this->currentMaxLink; |
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108 | } |
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109 | |||
110 | /** |
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111 | * Returns the current pager's max record limit. |
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112 | * |
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113 | * @return int|false |
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114 | */ |
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115 | public function getMaxRecordLimit() |
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116 | { |
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117 | return $this->maxRecordLimit; |
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118 | } |
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119 | |||
120 | /** |
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121 | * Sets the current pager's max record limit. |
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122 | */ |
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123 | public function setMaxRecordLimit(int $limit): void |
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124 | { |
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125 | $this->maxRecordLimit = $limit; |
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126 | } |
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127 | |||
128 | /** |
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129 | * Returns an array of page numbers to use in pagination links. |
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130 | * |
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131 | * @return int[] |
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132 | */ |
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133 | public function getLinks(?int $nbLinks = null): array |
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134 | { |
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135 | if (null === $nbLinks) { |
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136 | $nbLinks = $this->getMaxPageLinks(); |
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137 | } |
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138 | $links = []; |
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139 | $tmp = $this->page - floor($nbLinks / 2); |
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140 | $check = $this->lastPage - $nbLinks + 1; |
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141 | $limit = $check > 0 ? $check : 1; |
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142 | $begin = $tmp > 0 ? ($tmp > $limit ? $limit : $tmp) : 1; |
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143 | |||
144 | $i = (int) $begin; |
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145 | while ($i < $begin + $nbLinks && $i <= $this->lastPage) { |
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146 | $links[] = $i++; |
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147 | } |
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148 | |||
149 | $this->currentMaxLink = \count($links) ? $links[\count($links) - 1] : 1; |
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150 | |||
151 | return $links; |
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152 | } |
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153 | |||
154 | /** |
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155 | * Returns true if the current query requires pagination. |
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156 | */ |
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157 | public function haveToPaginate(): bool |
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158 | { |
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159 | return $this->getMaxPerPage() && $this->getNbResults() > $this->getMaxPerPage(); |
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160 | } |
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161 | |||
162 | /** |
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163 | * Returns the current cursor. |
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164 | */ |
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165 | public function getCursor(): int |
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166 | { |
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167 | return $this->cursor; |
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168 | } |
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169 | |||
170 | /** |
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171 | * Sets the current cursor. |
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172 | */ |
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173 | public function setCursor(int $pos): void |
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174 | { |
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175 | if ($pos < 1) { |
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176 | $this->cursor = 1; |
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177 | } else { |
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178 | if ($pos > $this->nbResults) { |
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179 | $this->cursor = $this->nbResults; |
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180 | } else { |
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181 | $this->cursor = $pos; |
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182 | } |
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183 | } |
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184 | } |
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185 | |||
186 | /** |
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187 | * Returns an object by cursor position. |
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188 | */ |
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189 | public function getObjectByCursor(int $pos): ?object |
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190 | { |
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191 | $this->setCursor($pos); |
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192 | |||
193 | return $this->getCurrent(); |
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194 | } |
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195 | |||
196 | /** |
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197 | * Returns the current object. |
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198 | */ |
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199 | public function getCurrent(): ?object |
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200 | { |
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201 | return $this->retrieveObject($this->cursor); |
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202 | } |
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203 | |||
204 | /** |
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205 | * Returns the next object. |
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206 | */ |
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207 | public function getNext(): ?object |
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208 | { |
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209 | if ($this->cursor + 1 > $this->nbResults) { |
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210 | return null; |
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211 | } |
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212 | |||
213 | return $this->retrieveObject($this->cursor + 1); |
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214 | } |
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215 | |||
216 | /** |
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217 | * Returns the previous object. |
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218 | */ |
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219 | public function getPrevious(): ?object |
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220 | { |
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221 | if ($this->cursor - 1 < 1) { |
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222 | return null; |
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223 | } |
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224 | |||
225 | return $this->retrieveObject($this->cursor - 1); |
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226 | } |
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227 | |||
228 | /** |
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229 | * Returns the first index on the current page. |
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230 | */ |
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231 | public function getFirstIndex(): int |
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232 | { |
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233 | if (0 === $this->page) { |
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234 | return 1; |
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235 | } |
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236 | |||
237 | return ($this->page - 1) * $this->maxPerPage + 1; |
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238 | } |
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239 | |||
240 | /** |
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241 | * Returns the last index on the current page. |
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242 | */ |
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243 | public function getLastIndex(): int |
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244 | { |
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245 | if (0 === $this->page) { |
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246 | return $this->nbResults; |
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247 | } |
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248 | if ($this->page * $this->maxPerPage >= $this->nbResults) { |
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249 | return $this->nbResults; |
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250 | } |
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251 | |||
252 | return $this->page * $this->maxPerPage; |
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253 | } |
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254 | |||
255 | public function getNbResults(): int |
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256 | { |
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257 | return $this->nbResults; |
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258 | } |
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259 | |||
260 | public function getFirstPage(): int |
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261 | { |
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262 | return 1; |
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263 | } |
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264 | |||
265 | public function getLastPage(): int |
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266 | { |
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267 | return $this->lastPage; |
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268 | } |
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269 | |||
270 | public function getPage(): int |
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271 | { |
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272 | return $this->page; |
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273 | } |
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274 | |||
275 | public function getNextPage(): int |
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276 | { |
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277 | return min($this->getPage() + 1, $this->getLastPage()); |
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278 | } |
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279 | |||
280 | public function getPreviousPage(): int |
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281 | { |
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282 | return max($this->getPage() - 1, $this->getFirstPage()); |
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283 | } |
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284 | |||
285 | public function setPage($page): void |
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286 | { |
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287 | $this->page = (int) $page; |
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288 | |||
289 | if ($this->page <= 0) { |
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290 | // set first page, which depends on a maximum set |
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291 | $this->page = $this->getMaxPerPage() ? 1 : 0; |
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292 | } |
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293 | } |
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294 | |||
295 | public function getMaxPerPage(): int |
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296 | { |
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297 | return $this->maxPerPage; |
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298 | } |
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299 | |||
300 | public function setMaxPerPage($max): void |
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301 | { |
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302 | $max = (int) $max; |
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303 | |||
304 | if ($max > 0) { |
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305 | $this->maxPerPage = $max; |
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306 | if (0 === $this->page) { |
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307 | $this->page = 1; |
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308 | } |
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309 | } else { |
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310 | if (0 === $max) { |
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311 | $this->maxPerPage = 0; |
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312 | $this->page = 0; |
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313 | } else { |
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314 | $this->maxPerPage = 1; |
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315 | if (0 === $this->page) { |
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316 | $this->page = 1; |
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317 | } |
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318 | } |
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319 | } |
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320 | } |
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321 | |||
322 | public function getMaxPageLinks(): int |
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323 | { |
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324 | return $this->maxPageLinks; |
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325 | } |
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326 | |||
327 | public function setMaxPageLinks(int $maxPageLinks): void |
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328 | { |
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329 | $this->maxPageLinks = $maxPageLinks; |
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330 | } |
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331 | |||
332 | /** |
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333 | * Returns true if on the first page. |
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334 | */ |
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335 | public function isFirstPage(): bool |
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336 | { |
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337 | return 1 === $this->page; |
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338 | } |
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339 | |||
340 | /** |
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341 | * Returns true if on the last page. |
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342 | */ |
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343 | public function isLastPage(): bool |
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344 | { |
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345 | return $this->page === $this->lastPage; |
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346 | } |
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347 | |||
348 | /** |
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349 | * Returns the current pager's parameter holder. |
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350 | * |
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351 | * @return array<string, mixed> |
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352 | */ |
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353 | public function getParameters(): array |
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354 | { |
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355 | return $this->parameters; |
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356 | } |
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357 | |||
358 | /** |
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359 | * Returns a parameter. |
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360 | * |
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361 | * @param mixed $default |
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362 | * |
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363 | * @return mixed |
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364 | */ |
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365 | public function getParameter(string $name, $default = null) |
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366 | { |
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367 | return isset($this->parameters[$name]) ? $this->parameters[$name] : $default; |
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368 | } |
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369 | |||
370 | /** |
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371 | * Checks whether a parameter has been set. |
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372 | */ |
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373 | public function hasParameter(string $name): bool |
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374 | { |
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375 | return isset($this->parameters[$name]); |
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376 | } |
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377 | |||
378 | /** |
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379 | * Sets a parameter. |
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380 | * |
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381 | * @param mixed $value |
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382 | */ |
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383 | public function setParameter(string $name, $value): void |
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384 | { |
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385 | $this->parameters[$name] = $value; |
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386 | } |
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387 | |||
388 | /** |
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389 | * @return object|false |
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390 | */ |
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391 | public function current() |
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392 | { |
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393 | if (!$this->isIteratorInitialized()) { |
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394 | $this->initializeIterator(); |
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395 | } |
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396 | |||
397 | return current($this->results); |
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398 | } |
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399 | |||
400 | /** |
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401 | * @return int|string |
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402 | */ |
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403 | public function key() |
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404 | { |
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405 | if (!$this->isIteratorInitialized()) { |
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406 | $this->initializeIterator(); |
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407 | } |
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408 | |||
409 | return key($this->results); |
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410 | } |
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411 | |||
412 | /** |
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413 | * @return object|false |
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414 | */ |
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415 | public function next() |
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416 | { |
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417 | if (!$this->isIteratorInitialized()) { |
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418 | $this->initializeIterator(); |
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419 | } |
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420 | |||
421 | --$this->resultsCounter; |
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422 | |||
423 | return next($this->results); |
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424 | } |
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425 | |||
426 | /** |
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427 | * @return object|false |
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428 | */ |
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429 | public function rewind() |
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430 | { |
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431 | if (!$this->isIteratorInitialized()) { |
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432 | $this->initializeIterator(); |
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433 | } |
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434 | |||
435 | $this->resultsCounter = \count($this->results); |
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436 | |||
437 | return reset($this->results); |
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438 | } |
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439 | |||
440 | public function valid(): bool |
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441 | { |
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442 | if (!$this->isIteratorInitialized()) { |
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443 | $this->initializeIterator(); |
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444 | } |
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445 | |||
446 | return $this->resultsCounter > 0; |
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447 | } |
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448 | |||
449 | public function count(): int |
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450 | { |
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451 | return $this->getNbResults(); |
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452 | } |
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453 | |||
454 | public function serialize(): string |
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455 | { |
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456 | $vars = get_object_vars($this); |
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457 | unset($vars['query']); |
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458 | |||
459 | return serialize($vars); |
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460 | } |
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461 | |||
462 | public function unserialize($serialized): void |
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463 | { |
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464 | $array = unserialize($serialized); |
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465 | |||
466 | foreach ($array as $name => $values) { |
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467 | $this->$name = $values; |
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468 | } |
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469 | } |
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470 | |||
471 | /** |
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472 | * @return string[] |
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473 | */ |
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474 | public function getCountColumn(): array |
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475 | { |
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476 | return $this->countColumn; |
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477 | } |
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478 | |||
479 | /** |
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480 | * @param string[] $countColumn |
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481 | */ |
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482 | public function setCountColumn(array $countColumn): void |
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483 | { |
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484 | $this->countColumn = $countColumn; |
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485 | } |
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486 | |||
487 | public function setQuery(ProxyQueryInterface $query): void |
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488 | { |
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489 | $this->query = $query; |
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490 | } |
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491 | |||
492 | public function getQuery(): ?ProxyQueryInterface |
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493 | { |
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494 | return $this->query; |
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495 | } |
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496 | |||
497 | protected function setNbResults(int $nbResults): void |
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498 | { |
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499 | $this->nbResults = $nbResults; |
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500 | } |
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501 | |||
502 | protected function setLastPage(int $page): void |
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503 | { |
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504 | $this->lastPage = $page; |
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505 | |||
506 | if ($this->getPage() > $page) { |
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507 | $this->setPage($page); |
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508 | } |
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509 | } |
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510 | |||
511 | /** |
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512 | * Returns true if the properties used for iteration have been initialized. |
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513 | */ |
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514 | protected function isIteratorInitialized(): bool |
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515 | { |
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516 | return null !== $this->results; |
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517 | } |
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518 | |||
519 | /** |
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520 | * Loads data into properties used for iteration. |
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521 | */ |
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522 | protected function initializeIterator(): void |
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523 | { |
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524 | $this->results = $this->getResults(); |
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525 | $this->resultsCounter = \count($this->results); |
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526 | } |
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527 | |||
528 | /** |
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529 | * Empties properties used for iteration. |
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530 | */ |
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531 | protected function resetIterator(): void |
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532 | { |
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533 | $this->results = null; |
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534 | $this->resultsCounter = 0; |
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535 | } |
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536 | |||
537 | /** |
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538 | * Retrieve the object for a certain offset. |
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539 | */ |
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540 | protected function retrieveObject(int $offset): ?object |
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541 | { |
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542 | $query = $this->getQuery(); |
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543 | |||
544 | if (null === $query) { |
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545 | return null; |
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546 | } |
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547 | |||
548 | $queryForRetrieve = clone $query; |
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549 | $queryForRetrieve |
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550 | ->setFirstResult($offset - 1) |
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551 | ->setMaxResults(1); |
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552 | |||
553 | $results = $queryForRetrieve->execute(); |
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554 | |||
555 | return $results[0] ?? null; |
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556 | } |
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557 | } |
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558 |
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