Query.php
471 lines
| 1 | <?php |
| 2 | |
| 3 | if ( ! defined( 'ABSPATH' ) ) { |
| 4 | exit; |
| 5 | } |
| 6 | |
| 7 | class AC_Meta_Query { |
| 8 | |
| 9 | /** |
| 10 | * @var WP_Meta_Query |
| 11 | */ |
| 12 | private $query; |
| 13 | |
| 14 | /** |
| 15 | * @var string |
| 16 | */ |
| 17 | private $sql; |
| 18 | |
| 19 | /** |
| 20 | * @var array |
| 21 | */ |
| 22 | private $select = array(); |
| 23 | |
| 24 | /** |
| 25 | * @var string|false |
| 26 | */ |
| 27 | private $count = false; |
| 28 | |
| 29 | /** |
| 30 | * @var bool |
| 31 | */ |
| 32 | private $distinct = false; |
| 33 | |
| 34 | /** |
| 35 | * @var bool |
| 36 | */ |
| 37 | private $join = false; |
| 38 | |
| 39 | /** |
| 40 | * @var array |
| 41 | */ |
| 42 | private $join_where = array(); |
| 43 | |
| 44 | /** |
| 45 | * @var array |
| 46 | */ |
| 47 | private $where = array(); |
| 48 | |
| 49 | /** |
| 50 | * @var array |
| 51 | */ |
| 52 | private $group_by = array(); |
| 53 | |
| 54 | /** |
| 55 | * @var array |
| 56 | */ |
| 57 | private $order_by = array(); |
| 58 | |
| 59 | /** |
| 60 | * @param string $meta_type |
| 61 | */ |
| 62 | public function __construct( $meta_type ) { |
| 63 | $this->set_query( $meta_type ); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Add a single field or multiple comma separated |
| 68 | * |
| 69 | * @param string $field e.g. id or id, meta_value |
| 70 | * |
| 71 | * @return $this |
| 72 | */ |
| 73 | public function select( $field ) { |
| 74 | $fields = explode( ',', $field ); |
| 75 | |
| 76 | foreach ( $fields as $field ) { |
| 77 | $this->select[] = trim( $field ); |
| 78 | } |
| 79 | |
| 80 | return $this; |
| 81 | } |
| 82 | |
| 83 | /** |
| 84 | * Add a COUNT clause AS count |
| 85 | * |
| 86 | * @param string $field |
| 87 | * |
| 88 | * @return $this |
| 89 | */ |
| 90 | public function count( $field ) { |
| 91 | $this->count = $field; |
| 92 | |
| 93 | return $this; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Group by an aggregated column. |
| 98 | * |
| 99 | * Supports: count |
| 100 | * |
| 101 | * @param string $field |
| 102 | * |
| 103 | * @return $this |
| 104 | */ |
| 105 | public function group_by( $field ) { |
| 106 | $this->group_by = $field; |
| 107 | |
| 108 | return $this; |
| 109 | } |
| 110 | |
| 111 | public function join( $type = 'inner' ) { |
| 112 | $this->join = strtoupper( $type ); |
| 113 | |
| 114 | return $this; |
| 115 | } |
| 116 | |
| 117 | public function left_join() { |
| 118 | return $this->join( 'left' ); |
| 119 | } |
| 120 | |
| 121 | /** |
| 122 | * @see get_where_clause() |
| 123 | * |
| 124 | * @return $this |
| 125 | */ |
| 126 | public function join_where( $field, $operator = null, $value = null, $boolean = 'AND' ) { |
| 127 | // set default join |
| 128 | if ( ! $this->join ) { |
| 129 | $this->join(); |
| 130 | } |
| 131 | |
| 132 | $this->join_where[] = $this->get_where_clause( $field, $operator, $value, $boolean ); |
| 133 | |
| 134 | return $this; |
| 135 | } |
| 136 | |
| 137 | public function order_by( $order_by, $order = 'asc' ) { |
| 138 | $parts = explode( ',', $order_by ); |
| 139 | |
| 140 | foreach ( $parts as $order_by ) { |
| 141 | $this->order_by[] = array( |
| 142 | 'order_by' => trim( $order_by ), |
| 143 | 'order' => strtoupper( $order ), |
| 144 | ); |
| 145 | } |
| 146 | |
| 147 | return $this; |
| 148 | } |
| 149 | |
| 150 | public function distinct() { |
| 151 | $this->distinct = true; |
| 152 | |
| 153 | return $this; |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Set a where clause |
| 158 | * |
| 159 | * @param string|array $field |
| 160 | * @param string $operator |
| 161 | * @param string|int|array $value |
| 162 | * @param string $type |
| 163 | * |
| 164 | * @return array |
| 165 | */ |
| 166 | private function get_where_clause( $field, $operator = null, $value = null, $boolean = 'AND' ) { |
| 167 | // allows to omit operator |
| 168 | if ( null === $value ) { |
| 169 | $value = $operator; |
| 170 | $operator = '='; |
| 171 | } |
| 172 | |
| 173 | $where = array( |
| 174 | 'nested' => false, |
| 175 | 'boolean' => strtoupper( $boolean ), |
| 176 | 'field' => $field, |
| 177 | 'operator' => strtoupper( $operator ), |
| 178 | 'value' => $value, |
| 179 | ); |
| 180 | |
| 181 | // set default join |
| 182 | if ( $field === 'post_type' && ! $this->join ) { |
| 183 | $this->join(); |
| 184 | } |
| 185 | |
| 186 | $nested = array(); |
| 187 | |
| 188 | if ( is_array( $field ) ) { |
| 189 | for ( $i = 0; $i < count( $field ); $i++ ) { |
| 190 | $nested[] = array_pop( $this->where ); |
| 191 | } |
| 192 | } |
| 193 | |
| 194 | if ( $nested ) { |
| 195 | $where['nested'] = true; |
| 196 | $where['field'] = array_reverse( $nested ); |
| 197 | } |
| 198 | |
| 199 | return $where; |
| 200 | } |
| 201 | |
| 202 | /** |
| 203 | * @see get_where_clause() |
| 204 | * |
| 205 | * @return $this |
| 206 | */ |
| 207 | public function remove_where( $field, $operator = null, $value = null, $boolean = 'AND' ) { |
| 208 | $where = $this->get_where_clause( $field, $operator, $value, $boolean ); |
| 209 | |
| 210 | foreach ( $this->where as $k => $v ) { |
| 211 | if ( $v == $where ) { |
| 212 | unset( $this->where[ $k ] ); |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | return $this; |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * @see get_where_clause() |
| 221 | * |
| 222 | * @return $this |
| 223 | */ |
| 224 | public function where( $field, $operator = null, $value = null, $boolean = 'AND' ) { |
| 225 | $this->where[] = $this->get_where_clause( $field, $operator, $value, $boolean ); |
| 226 | |
| 227 | return $this; |
| 228 | } |
| 229 | |
| 230 | /** |
| 231 | * @see get_where_clause() |
| 232 | * |
| 233 | * @return $this |
| 234 | */ |
| 235 | public function or_where( $field, $operator = null, $value = null ) { |
| 236 | return $this->where( $field, $operator, $value, 'OR' ); |
| 237 | } |
| 238 | |
| 239 | /** |
| 240 | * @param array $in |
| 241 | * |
| 242 | * @return $this |
| 243 | */ |
| 244 | public function where_in( array $in ) { |
| 245 | return $this->where( 'id', 'in', $in ); |
| 246 | } |
| 247 | |
| 248 | public function where_is_null( $field ) { |
| 249 | return $this->where( $field, '', 'IS NULL' ); |
| 250 | } |
| 251 | |
| 252 | public function where_post_type( $post_type ) { |
| 253 | return $this->where( 'post_type', '=', $post_type ); |
| 254 | } |
| 255 | |
| 256 | private function parse_field( $field ) { |
| 257 | switch ( $field ) { |
| 258 | case 'id': |
| 259 | $field = $this->join ? 'pt.' . $this->query->primary_id_column : 'mt' . $this->query->meta_id_column; |
| 260 | |
| 261 | break; |
| 262 | case 'meta_key': |
| 263 | case 'meta_value': |
| 264 | $field = 'mt.' . $field; |
| 265 | |
| 266 | break; |
| 267 | case 'taxonomy': |
| 268 | case 'post_type': |
| 269 | $field = 'pt.' . $field; |
| 270 | |
| 271 | break; |
| 272 | } |
| 273 | |
| 274 | return $field; |
| 275 | } |
| 276 | |
| 277 | private function parse_where( $where, $clauses ) { |
| 278 | global $wpdb; |
| 279 | |
| 280 | foreach ( $clauses as $clause ) { |
| 281 | |
| 282 | if ( $clause['nested'] ) { |
| 283 | $clause['field'][0]['boolean'] = null; |
| 284 | |
| 285 | $where .= sprintf( ' %s ( %s ) ', $clause['boolean'], $this->parse_where( '', $clause['field'] ) ); |
| 286 | } else { |
| 287 | switch ( $clause['operator'] ) { |
| 288 | case 'IN': |
| 289 | $clause['value'] = sprintf( ' ( %s ) ', implode( ', ', array_map( 'intval', $clause['value'] ) ) ); |
| 290 | |
| 291 | break; |
| 292 | default: |
| 293 | $valid_raw = array( 'IS NULL', 'IS NOT NULL' ); |
| 294 | |
| 295 | if ( ! in_array( $clause['value'], $valid_raw ) ) { |
| 296 | $clause['value'] = $wpdb->prepare( '%s', $clause['value'] ); |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | $clause['field'] = $this->parse_field( $clause['field'] ); |
| 301 | |
| 302 | $where .= implode( ' ', $clause ); |
| 303 | } |
| 304 | |
| 305 | } |
| 306 | |
| 307 | return $where; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * @return array |
| 312 | */ |
| 313 | public function get() { |
| 314 | global $wpdb; |
| 315 | |
| 316 | if ( ! $this->query ) { |
| 317 | return array(); |
| 318 | } |
| 319 | |
| 320 | // parse SELECT |
| 321 | $select = 'SELECT '; |
| 322 | $select .= $this->distinct ? 'DISTINCT ' : ''; |
| 323 | |
| 324 | if ( empty( $this->select ) ) { |
| 325 | $this->select( 'id' ); |
| 326 | } |
| 327 | |
| 328 | $fields = array(); |
| 329 | |
| 330 | foreach ( $this->select as $field ) { |
| 331 | $parsed = $this->parse_field( $field ); |
| 332 | |
| 333 | // output 'id' in the results |
| 334 | if ( 'id' === $field ) { |
| 335 | $parsed .= ' AS id'; |
| 336 | } |
| 337 | |
| 338 | $fields[] = $parsed; |
| 339 | } |
| 340 | |
| 341 | if ( $this->count ) { |
| 342 | $fields[] = sprintf( 'COUNT(%s) AS count', $this->parse_field( $this->count ) ); |
| 343 | } |
| 344 | |
| 345 | $select .= implode( ', ', $fields ); |
| 346 | |
| 347 | // parse FROM |
| 348 | $from_tpl = ' FROM %s AS %s'; |
| 349 | |
| 350 | $from = sprintf( $from_tpl, $this->query->meta_table, 'mt' ); |
| 351 | $join = ''; |
| 352 | |
| 353 | if ( $this->join ) { |
| 354 | $from = sprintf( $from_tpl, $this->query->primary_table, 'pt' ); |
| 355 | $join = sprintf( ' %s JOIN %s AS mt ON mt.%s = pt.%s %s', |
| 356 | $this->join, |
| 357 | $this->query->meta_table, |
| 358 | $this->query->meta_id_column, |
| 359 | $this->query->primary_id_column, |
| 360 | $this->parse_where( '', $this->join_where ) |
| 361 | ); |
| 362 | } |
| 363 | |
| 364 | // parse WHERE |
| 365 | $where = $this->parse_where( ' WHERE 1=1', $this->where ); |
| 366 | |
| 367 | // parse GROUP BY |
| 368 | $group_by = ''; |
| 369 | |
| 370 | if ( $this->group_by ) { |
| 371 | $group_by = ' GROUP BY ' . $this->parse_field( $this->group_by ); |
| 372 | } |
| 373 | |
| 374 | // parse ORDER BY |
| 375 | $order_by = ''; |
| 376 | |
| 377 | if ( ! empty( $this->order_by ) ) { |
| 378 | $order_by_clauses = array(); |
| 379 | |
| 380 | foreach ( $this->order_by as $order_by_clause ) { |
| 381 | $order_by_clauses[] = $this->parse_field( $order_by_clause['order_by'] ) . ' ' . $order_by_clause['order']; |
| 382 | } |
| 383 | |
| 384 | $order_by = ' ORDER BY ' . implode( ', ', $order_by_clauses ); |
| 385 | } |
| 386 | |
| 387 | // build query and store it |
| 388 | $sql = $select . $from . $join . $where . $group_by . $order_by; |
| 389 | |
| 390 | $this->set_sql( $sql ); |
| 391 | |
| 392 | $results = $wpdb->get_results( $sql ); |
| 393 | |
| 394 | if ( ! is_array( $results ) ) { |
| 395 | return array(); |
| 396 | } |
| 397 | |
| 398 | $return = $results; |
| 399 | |
| 400 | if ( count( $fields ) === 1 ) { |
| 401 | $return = array(); |
| 402 | $field = $this->select[0]; |
| 403 | |
| 404 | foreach ( $results as $result ) { |
| 405 | $return[] = $result->$field; |
| 406 | } |
| 407 | } |
| 408 | |
| 409 | return $return; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * Return last sql that was queried |
| 414 | * |
| 415 | * @return string |
| 416 | */ |
| 417 | public function get_sql() { |
| 418 | $sql = preg_replace( '/ +/', ' ', $this->sql ); |
| 419 | $sql = preg_replace( '/(SELECT|FROM|LEFT|INNER|WHERE|(AND|OR) \(|(AND|OR) (?!\()|ORDER BY|GROUP BY)/', "\n$1", $sql ); |
| 420 | |
| 421 | return $sql . "\n"; |
| 422 | } |
| 423 | |
| 424 | private function set_sql( $sql ) { |
| 425 | $this->sql = $sql; |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * @return WP_Meta_Query |
| 430 | */ |
| 431 | public function get_query() { |
| 432 | return $this->query; |
| 433 | } |
| 434 | |
| 435 | private function set_query( $type ) { |
| 436 | global $wpdb; |
| 437 | |
| 438 | switch ( $type ) { |
| 439 | case 'user': |
| 440 | $table = $wpdb->users; |
| 441 | $id = 'ID'; |
| 442 | |
| 443 | break; |
| 444 | case 'comment': |
| 445 | $table = $wpdb->comments; |
| 446 | $id = 'comment_ID'; |
| 447 | |
| 448 | break; |
| 449 | case 'post': |
| 450 | $table = $wpdb->posts; |
| 451 | $id = 'ID'; |
| 452 | |
| 453 | break; |
| 454 | case 'term': |
| 455 | $table = $wpdb->terms; |
| 456 | $id = 'term_id'; |
| 457 | |
| 458 | break; |
| 459 | |
| 460 | default: |
| 461 | return false; |
| 462 | } |
| 463 | |
| 464 | $this->query = new WP_Meta_Query(); |
| 465 | $this->query->get_sql( $type, $table, $id ); |
| 466 | |
| 467 | return true; |
| 468 | } |
| 469 | |
| 470 | } |
| 471 |