Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like CHTMLTable often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use CHTMLTable, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 18 | class CHTMLTable |
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| 19 | { |
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| 20 | const FOOTER = 'footer'; |
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| 21 | |||
| 22 | private $tableSpec; |
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| 23 | private $tableHead; |
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| 24 | private $tableBody; |
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| 25 | private $tableFoot; |
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| 26 | |||
| 27 | /** |
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| 28 | * Constructor |
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| 29 | * |
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| 30 | * Creates a table with table head, table body and if specified, a table |
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| 31 | * footer. It is possible to specify the table and the tabel cells settings |
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| 32 | * per column. |
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| 33 | * |
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| 34 | * @param [] $tableSpecs table settings. |
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| 35 | * @param [] $data table cell data. |
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| 36 | * @param [] $columnSpecs table columns cell settings. |
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| 37 | */ |
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| 38 | 10 | public function __construct($tableSpecs = [], $data = [], $columnSpecs = []) |
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| 42 | |||
| 43 | /** |
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| 44 | * Creates a table with cell data. |
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| 45 | * |
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| 46 | * Creates a table with table head, table body with table data and if |
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| 47 | * specified, a table footer. It is possible to specify the table and the |
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| 48 | * tabel cells settings per column. |
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| 49 | * |
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| 50 | * @param [] $tableSpec table settings. |
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| 51 | * @param [] $data table cell data. |
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| 52 | * @param [] $columnSpecs table columns cell settings. |
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| 53 | * |
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| 54 | * @return object the html table object. |
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| 55 | */ |
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| 56 | 10 | public function create($tableSpecs = [], $data = [], $columnSpecs = []) |
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| 67 | |||
| 68 | /** |
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| 69 | * Helper method to reset main parts of table tags. |
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| 70 | * |
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| 71 | * Sets the table head, table body and table foot tag to null. |
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| 72 | * |
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| 73 | * @return void |
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| 74 | */ |
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| 75 | 10 | private function resetTableTags() |
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| 81 | |||
| 82 | /** |
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| 83 | * Helper method to set the table specifications. |
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| 84 | * |
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| 85 | * Merges the table specifications with the default specifications. |
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| 86 | * Default table CSS id is html-table. |
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| 87 | * |
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| 88 | * @param [] $table table settings. |
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| 89 | * |
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| 90 | * @return void |
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| 91 | */ |
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| 92 | 10 | private function setTableSpecifications($tableSpec) |
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| 105 | |||
| 106 | /** |
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| 107 | * Helper method to check if a CSS class tag is present |
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| 108 | * |
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| 109 | * Checks if a CSS class tag is present in the table specification. |
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| 110 | * |
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| 111 | * @param [] $tableSpec the table specification. |
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| 112 | * |
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| 113 | * @return boolean true if class is present in the table specification, |
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| 114 | * false otherwise. |
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| 115 | */ |
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| 116 | 10 | private function isClassPresent($tableSpec) |
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| 120 | |||
| 121 | /** |
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| 122 | * Helper method to reset the id tag. |
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| 123 | * |
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| 124 | * Sets the CSS id tag to null. |
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| 125 | * |
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| 126 | * @param [] $tableSpec the table specification. |
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| 127 | * |
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| 128 | * @return [] the table specification without the CSS id tag. |
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| 129 | */ |
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| 130 | 1 | private function removeId($tableSpec) { |
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| 135 | |||
| 136 | /** |
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| 137 | * Helper method to create the table head. |
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| 138 | * |
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| 139 | * Creates the table head. The title of the columns are set according to |
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| 140 | * the table tag in the column specifications. Otherwise, the title is set |
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| 141 | * to the keys name in the table cell data array. |
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| 142 | * |
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| 143 | * @param [] $data table cell data. |
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| 144 | * @param [] $columnSpecs table columns cell settings. |
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| 145 | * |
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| 146 | * @return void |
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| 147 | */ |
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| 148 | 10 | private function createTableHead($data, $columnSpecs) |
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| 163 | |||
| 164 | /** |
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| 165 | * Helper method to set the column titles from the data array. |
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| 166 | * |
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| 167 | * Uses the first row in the table cell data array to set the titles of |
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| 168 | * the columns. The name of the columns are the key name in the associative |
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| 169 | * array containing data for the table. |
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| 170 | * |
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| 171 | * @param [] $data table cell data. |
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| 172 | * |
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| 173 | * @return void |
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| 174 | */ |
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| 175 | 10 | private function setColumnTitlesFromData($data) |
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| 184 | |||
| 185 | /** |
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| 186 | * Helper method to set the column titles from column specifications. |
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| 187 | * |
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| 188 | * Uses column specifications to set the name of the columns in the table |
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| 189 | * head. |
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| 190 | * |
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| 191 | * @param [] $columnSpecs table columns cell settings |
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| 192 | * |
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| 193 | * @return void |
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| 194 | */ |
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| 195 | 6 | private function setColumnTitlesFromColumnSpecifications($columnSpecs) |
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| 205 | |||
| 206 | /** |
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| 207 | * Helper method to check if the column cell belongs to the footer. |
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| 208 | * |
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| 209 | * Checks the type tag, in the column specification for one column, if the |
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| 210 | * tag is present and set to footer. |
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| 211 | * |
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| 212 | * @param [] $columnSpec cell settings for one column. |
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| 213 | * |
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| 214 | * @return boolean true if the cell type belongs to the footer, false otherwise. |
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| 215 | */ |
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| 216 | 6 | private function isTableFooter($columnSpec) |
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| 227 | |||
| 228 | /** |
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| 229 | * Helper method to get title from a column specification, if specified. |
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| 230 | * |
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| 231 | * Uses the title tag in the column specification for one column to get |
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| 232 | * the title. If the title tag is not set, the title is the key name in |
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| 233 | * the associative array containing data for the table. |
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| 234 | * |
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| 235 | * @param [] $key the name of the key for the table cell data. |
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| 236 | * @param [] $columnSpec cell settings for one column. |
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| 237 | * |
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| 238 | * @return [] the name from the title tag in the cell specification. |
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| 239 | * Otherwise, the table cell data key name. |
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| 240 | */ |
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| 241 | 6 | private function getTitle($key, $columnSpec) |
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| 245 | |||
| 246 | /** |
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| 247 | * Helper method to create the table body with table cell data. |
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| 248 | * |
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| 249 | * Sets the table cell data in the table body. |
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| 250 | * |
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| 251 | * @param [] $data table cell data. |
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| 252 | * @param [] $columnSpecs table columns cell settings. |
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| 253 | * |
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| 254 | * @return void |
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| 255 | */ |
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| 256 | 10 | private function createTableBody($data, $columnSpecs) |
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| 263 | |||
| 264 | /** |
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| 265 | * Helper method to set table data in table body. |
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| 266 | * |
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| 267 | * Sets table data according to the column specifications, if it is |
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| 268 | * specified. Otherwise it sets the data as it is stored in the data array. |
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| 269 | * |
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| 270 | * @param [] $data table cell data. |
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| 271 | * @param [] $columnSpecs table columns cell settings. |
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| 272 | * |
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| 273 | * @return void |
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| 274 | */ |
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| 275 | 10 | private function setTableData($data, $columnSpecs) |
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| 283 | |||
| 284 | /** |
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| 285 | * Helper method to set table data from the data array. |
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| 286 | * |
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| 287 | * Sets table data from the data array. |
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| 288 | * |
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| 289 | * @param [] $data table cell data. |
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| 290 | * |
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| 291 | * @return void |
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| 292 | */ |
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| 293 | 10 | private function setTableDataFromData($data) |
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| 305 | |||
| 306 | /** |
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| 307 | * Helper method to set table data according to the column specifications. |
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| 308 | * |
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| 309 | * Sets the table data according to the column specifications, if the cell |
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| 310 | * does not belong to the footer. Adds a colspan tag, if it is specified |
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| 311 | * for the cell in the column. |
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| 312 | * |
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| 313 | * @param [] $data table cell data. |
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| 314 | * @param [] $columnSpecs table columns cell settings. |
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| 315 | * |
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| 316 | * @return void |
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| 317 | */ |
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| 318 | 6 | private function setTableDataAsSpecified($data, $columnSpecs) |
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| 333 | |||
| 334 | /** |
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| 335 | * Helper method to get the colspan value, if specified in the column |
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| 336 | * specification for the cell. |
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| 337 | * |
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| 338 | * @param [] $columnSpec cell settings for one column. |
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| 339 | * |
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| 340 | * @return int the colspan value if specified. Otherwise null. |
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| 341 | */ |
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| 342 | 6 | private function getColspan($columnSpec) |
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| 346 | |||
| 347 | /** |
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| 348 | * Helper method to get the value for a specific position in one row in |
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| 349 | * the data array. |
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| 350 | * |
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| 351 | * Gets the data from a specific position in one row in the data array. |
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| 352 | * If a function is specified for the cell in the column, the data is |
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| 353 | * runned through the function before it is returned. |
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| 354 | * |
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| 355 | * @param [] $row one row of in the array of table data. |
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| 356 | * @param string $key the name of the key in the associative data array. |
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| 357 | * @param [] $columnSpec cell settings for one column. |
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| 358 | */ |
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| 359 | 6 | private function getValue($row, $key, $columnSpec) |
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| 368 | |||
| 369 | /** |
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| 370 | * Helper method t check if the function tag is specified for the cells in |
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| 371 | * one column. |
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| 372 | * |
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| 373 | * Checks if the function tag is set for the cell in one column. |
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| 374 | * |
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| 375 | * @param [] $columnSpec cell settings for one column. |
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| 376 | * |
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| 377 | * @return boolean true if a function is connected to the cell, false otherwise. |
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| 378 | */ |
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| 379 | 6 | private function isFunctionSpecified($columnSpec) |
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| 383 | |||
| 384 | /** |
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| 385 | * Helper method to run the value through a function before it is returned. |
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| 386 | * |
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| 387 | * Runs the value through a function, if a function is connected to the cell |
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| 388 | * in the column. If not function is connected to the cell through the |
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| 389 | * column specification, the value is returned as it is. |
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| 390 | * |
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| 391 | * @param [] $columnSpec cell settings for one column |
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| 392 | * @param mixed $dataValue the value to run through function, if specified. |
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| 393 | * |
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| 394 | * @return the value. |
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| 395 | */ |
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| 396 | 2 | private function getValueThroughFunction($columnSpec, $dataValue) |
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| 404 | |||
| 405 | /** |
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| 406 | * Helper method to create table footer with data. |
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| 407 | * |
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| 408 | * Creates table footer if the cell settings for the column is set to |
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| 409 | * footer in the column specifications. |
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| 410 | * Adds a colspan tag, if it is specified for the cell in the column. |
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| 411 | * |
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| 412 | * @param [] $columnSpecs table columns cell settings. |
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| 413 | * |
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| 414 | * @return void |
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| 415 | */ |
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| 416 | 10 | private function createTableFooter($columnSpecs) |
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| 431 | |||
| 432 | /** |
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| 433 | * Helper method to get table footer data. |
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| 434 | * |
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| 435 | * Gets table footer data from the column specification. Checks if the |
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| 436 | * value should be fetched from a function or from the value tag. |
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| 437 | * If either the function or the value specified, an empty string is |
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| 438 | * returned. |
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| 439 | * |
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| 440 | * @param [] $columnSpec cell settings for one column. |
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| 441 | * |
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| 442 | * @return mixed the cell data value. |
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| 443 | */ |
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| 444 | 2 | private function getFooterData($columnSpec) |
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| 452 | |||
| 453 | /** |
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| 454 | * Gets the table. |
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| 455 | * |
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| 456 | * Gets the table with table data. |
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| 457 | * |
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| 458 | * @return html the table with table data. |
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| 459 | */ |
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| 460 | 10 | public function getHTMLTable() |
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| 475 | } |
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| 476 |
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