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| 1 | <?php | 
| 2 | /** | 
| 3 | * Pop PHP Framework (https://www.popphp.org/) | 
| 4 | * | 
| 5 | * @link https://github.com/popphp/popphp-framework | 
| 6 | * @author Nick Sagona, III <dev@noladev.com> | 
| 7 | * @copyright Copyright (c) 2009-2025 NOLA Interactive, LLC. | 
| 8 | * @license https://www.popphp.org/license New BSD License | 
| 9 | */ | 
| 10 | |
| 11 | /** | 
| 12 | * @namespace | 
| 13 | */ | 
| 14 | namespace Pop\Db\Sql\Schema; | 
| 15 | |
| 16 | use Pop\Db\Adapter\AbstractAdapter; | 
| 17 | |
| 18 | /** | 
| 19 | * Schema ALTER table class | 
| 20 | * | 
| 21 | * @category Pop | 
| 22 | * @package Pop\Db | 
| 23 | * @author Nick Sagona, III <dev@noladev.com> | 
| 24 | * @copyright Copyright (c) 2009-2025 NOLA Interactive, LLC. | 
| 25 | * @license https://www.popphp.org/license New BSD License | 
| 26 | * @version 6.6.5 | 
| 27 | */ | 
| 28 | class Alter extends AbstractStructure | 
| 29 | { | 
| 30 | |
| 31 | /** | 
| 32 | * Existing columns in the table | 
| 33 | * @var array | 
| 34 | */ | 
| 35 | protected array $existingColumns = []; | 
| 36 | |
| 37 | /** | 
| 38 | * Columns to be dropped | 
| 39 | * @var array | 
| 40 | */ | 
| 41 | protected array $dropColumns = []; | 
| 42 | |
| 43 | /** | 
| 44 | * Indices to be dropped | 
| 45 | * @var array | 
| 46 | */ | 
| 47 | protected array $dropIndices = []; | 
| 48 | |
| 49 | /** | 
| 50 | * Constraints to be dropped | 
| 51 | * @var array | 
| 52 | */ | 
| 53 | protected array $dropConstraints = []; | 
| 54 | |
| 55 | /** | 
| 56 | * Constructor | 
| 57 | * | 
| 58 | * Instantiate the ALTER table object | 
| 59 | * | 
| 60 | * @param string $table | 
| 61 | * @param AbstractAdapter $db | 
| 62 | */ | 
| 63 | public function __construct(string $table, $db) | 
| 64 | { | 
| 65 | parent::__construct($table, $db); | 
| 66 | |
| 67 | if (count($this->info['columns']) > 0) { | 
| 68 | foreach ($this->info['columns'] as $name => $column) { | 
| 69 | $size = null; | 
| 70 | $precision = null; | 
| 71 | if (str_contains($column['type'], '(')) { | 
| 72 | $type = substr($column['type'], 0, strpos($column['type'], '(')); | 
| 73 | if (str_contains($column['type'], ',')) { | 
| 74 | $size = substr($column['type'], (strpos($column['type'], '(') + 1)); | 
| 75 | $size = substr($size, 0, strpos($size, ',')); | 
| 76 | $precision = substr($column['type'], (strpos($column['type'], ',') + 1)); | 
| 77 | $precision = trim(substr($precision, 0, strpos($precision, ')'))); | 
| 78 | } else { | 
| 79 | $size = substr($column['type'], (strpos($column['type'], '(') + 1)); | 
| 80 | $size = substr($size, 0, strpos($size, ')')); | 
| 81 | } | 
| 82 | } else { | 
| 83 | $type = $column['type']; | 
| 84 | } | 
| 85 | |
| 86 | $this->existingColumns[$name] = [ | 
| 87 | 'type' => $type, | 
| 88 | 'size' => $size, | 
| 89 | 'precision' => $precision, | 
| 90 | 'nullable' => $column['null'], | 
| 91 | 'default' => null, | 
| 92 | 'increment' => false, | 
| 93 | 'primary' => $column['primary'], | 
| 94 | 'unsigned' => false, | 
| 95 | 'attributes' => [], | 
| 96 | 'modify' => null | 
| 97 | ]; | 
| 98 | } | 
| 99 | } | 
| 100 | } | 
| 101 | |
| 102 | /** | 
| 103 | * Modify a column | 
| 104 | * | 
| 105 | * @param string $oldName | 
| 106 | * @param string $newName | 
| 107 | * @param ?string $type | 
| 108 | * @param mixed $size | 
| 109 | * @param mixed $precision | 
| 110 | * @return Alter | 
| 111 | */ | 
| 112 | public function modifyColumn(string $oldName, string $newName, ?string $type = null, mixed $size = null, mixed $precision = null): Alter | 
| 113 | { | 
| 114 | if (isset($this->existingColumns[$oldName])) { | 
| 115 | if ($type !== null) { | 
| 116 | $this->existingColumns[$oldName]['type'] = $type; | 
| 117 | } | 
| 118 | if ($size !== null) { | 
| 119 | $this->existingColumns[$oldName]['size'] = $size; | 
| 120 | } | 
| 121 | if ($precision !== null) { | 
| 122 | $this->existingColumns[$oldName]['precision'] = $precision; | 
| 123 | } | 
| 124 | |
| 125 | $this->existingColumns[$oldName]['modify'] = $newName; | 
| 126 | } | 
| 127 | |
| 128 | return $this; | 
| 129 | } | 
| 130 | |
| 131 | /** | 
| 132 | * Drop a column | 
| 133 | * | 
| 134 | * @param string $name | 
| 135 | * @return Alter | 
| 136 | */ | 
| 137 | public function dropColumn(string $name): Alter | 
| 138 | { | 
| 139 | if (!in_array($name, $this->dropColumns)) { | 
| 140 | $this->dropColumns[] = $name; | 
| 141 | } | 
| 142 | return $this; | 
| 143 | } | 
| 144 | |
| 145 | /** | 
| 146 | * Drop an index | 
| 147 | * | 
| 148 | * @param string $name | 
| 149 | * @return Alter | 
| 150 | */ | 
| 151 | public function dropIndex(string $name): Alter | 
| 152 | { | 
| 153 | if (!in_array($name, $this->dropIndices)) { | 
| 154 | $this->dropIndices[] = $name; | 
| 155 | } | 
| 156 | return $this; | 
| 157 | } | 
| 158 | |
| 159 | /** | 
| 160 | * Drop a constraint | 
| 161 | * | 
| 162 | * @param string $name | 
| 163 | * @return Alter | 
| 164 | */ | 
| 165 | public function dropConstraint(string $name): Alter | 
| 166 | { | 
| 167 | if (!in_array($name, $this->dropConstraints)) { | 
| 168 | $this->dropConstraints[] = $name; | 
| 169 | } | 
| 170 | return $this; | 
| 171 | } | 
| 172 | |
| 173 | /** | 
| 174 | * Set the AFTER column (MySQL-only)) | 
| 175 | * | 
| 176 | * @param string $column | 
| 177 | * @return Alter | 
| 178 | */ | 
| 179 | public function after(string $column): Alter | 
| 180 | { | 
| 181 | if (($this->currentColumn !== null) && isset($this->columns[$this->currentColumn])) { | 
| 182 | $this->columns[$this->currentColumn]['after'] = $column; | 
| 183 | } | 
| 184 | return $this; | 
| 185 | } | 
| 186 | |
| 187 | /** | 
| 188 | * Render the table schema | 
| 189 | * | 
| 190 | * @return string | 
| 191 | */ | 
| 192 | public function render(): string | 
| 193 | { | 
| 194 | $schema = ''; | 
| 195 | |
| 196 | // Modify existing columns | 
| 197 | foreach ($this->existingColumns as $name => $column) { | 
| 198 | if ($column['modify'] !== null) { | 
| 199 | if ($this->isMysql()) { | 
| 200 | $schema .= 'ALTER TABLE ' . $this->quoteId($this->table) . | 
| 201 | ' CHANGE COLUMN ' . $this->quoteId($name) . ' ' . | 
| 202 | $this->getColumnSchema($column['modify'], $column) . ';' . PHP_EOL; | 
| 203 | } else { | 
| 204 | if ($column['modify'] == $name) { | 
| 205 | $schema .= 'ALTER TABLE ' . $this->quoteId($this->table) . ' ALTER COLUMN ' . | 
| 206 | $this->getColumnSchema($column['modify'], $column) . ';' . PHP_EOL; | 
| 207 | } else { | 
| 208 | $schema .= 'ALTER TABLE ' . $this->quoteId($this->table) . ' RENAME COLUMN ' . | 
| 209 | $this->quoteId($name) . ' ' . $this->quoteId($column['modify']) . ';' . PHP_EOL; | 
| 210 | } | 
| 211 | } | 
| 212 | } | 
| 213 | } | 
| 214 | |
| 215 | // Add new columns | 
| 216 | foreach ($this->columns as $name => $column) { | 
| 217 | $schema .= 'ALTER TABLE ' . $this->quoteId($this->table) . ' ADD ' . $this->getColumnSchema($name, $column); | 
| 218 | if (($this->isMysql()) && !empty($column['after'])) { | 
| 219 | $schema .= ' AFTER ' . $this->quoteId($column['after']); | 
| 220 | } | 
| 221 | $schema .= ';' . PHP_EOL; | 
| 222 | } | 
| 223 | |
| 224 | // Drop columns | 
| 225 | foreach ($this->dropColumns as $name => $column) { | 
| 226 | $schema .= 'ALTER TABLE ' . $this->quoteId($this->table) . ' DROP COLUMN ' . $this->quoteId($column) . ';' . PHP_EOL; | 
| 227 | } | 
| 228 | |
| 229 | // Drop indices | 
| 230 | foreach ($this->dropIndices as $index) { | 
| 231 | if ($this->isMysql()) { | 
| 232 | $schema .= 'ALTER TABLE ' . $this->quoteId($this->table) . ' DROP INDEX ' . $this->quoteId($index) . ';' . PHP_EOL; | 
| 233 | } else { | 
| 234 | $schema .= 'DROP INDEX ' . $this->quoteId($this->table . '.' . $index) . ';' . PHP_EOL; | 
| 235 | } | 
| 236 | } | 
| 237 | |
| 238 | // Drop constraints | 
| 239 | foreach ($this->dropConstraints as $constraint) { | 
| 240 | if ($this->isMysql()) { | 
| 241 | $schema .= 'ALTER TABLE ' . $this->quoteId($this->table) . ' DROP FOREIGN KEY ' . | 
| 242 | $this->quoteId($constraint) . ';' . PHP_EOL; | 
| 243 | } else { | 
| 244 | $schema .= 'ALTER TABLE ' . $this->quoteId($this->table) . ' DROP CONSTRAINT ' . | 
| 245 | $this->quoteId($constraint) . ';' . PHP_EOL; | 
| 246 | } | 
| 247 | } | 
| 248 | |
| 249 | // Add indices | 
| 250 | if (count($this->indices) > 0) { | 
| 251 | $schema .= Formatter\Table::createIndices($this->indices, $this->table, $this); | 
| 252 | } | 
| 253 | |
| 254 | // Add constraints | 
| 255 | if (count($this->constraints) > 0) { | 
| 256 | $schema .= Formatter\Table::createConstraints($this->constraints, $this->table, $this); | 
| 257 | } | 
| 258 | |
| 259 | return $schema . PHP_EOL; | 
| 260 | } | 
| 261 | |
| 262 | /** | 
| 263 | * Render the table schema to string | 
| 264 | * | 
| 265 | * @return string | 
| 266 | */ | 
| 267 | public function __toString(): string | 
| 268 | { | 
| 269 | return $this->render(); | 
| 270 | } | 
| 271 | |
| 272 | } |