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| 1 | <?php |
| 2 | |
| 3 | namespace Flow\Data\Utils; |
| 4 | |
| 5 | use RecursiveArrayIterator; |
| 6 | use RecursiveIteratorIterator; |
| 7 | |
| 8 | /** |
| 9 | * This object can be used to easily set keys in a multi-dimensional array. |
| 10 | * |
| 11 | * Usage: |
| 12 | * |
| 13 | * $arr = new Flow\Data\MultiDimArray; |
| 14 | * $arr[[1,2,3]] = 4; |
| 15 | * $arr[[2,3,4]] = 5; |
| 16 | * var_export( $arr->all() ); |
| 17 | * |
| 18 | * array ( |
| 19 | * 1 => array ( |
| 20 | * 2 => array ( |
| 21 | * 3 => 4, |
| 22 | * ), |
| 23 | * ), |
| 24 | * 2 => array ( |
| 25 | * 3 => array ( |
| 26 | * 4 => 5, |
| 27 | * ), |
| 28 | * ), |
| 29 | * ) |
| 30 | */ |
| 31 | class MultiDimArray implements \ArrayAccess { |
| 32 | /** @var array */ |
| 33 | protected $data = []; |
| 34 | |
| 35 | public function all() { |
| 36 | return $this->data; |
| 37 | } |
| 38 | |
| 39 | /** |
| 40 | * Probably not what you want. primary key value is lost, you only |
| 41 | * receive the final key in a composite key set. |
| 42 | * @return RecursiveIteratorIterator |
| 43 | */ |
| 44 | public function getIterator() { |
| 45 | $it = new RecursiveArrayIterator( $this->data ); |
| 46 | return new RecursiveIteratorIterator( $it ); |
| 47 | } |
| 48 | |
| 49 | public function offsetSet( $offset, $value ): void { |
| 50 | $data =& $this->data; |
| 51 | foreach ( (array)$offset as $key ) { |
| 52 | if ( !isset( $data[$key] ) ) { |
| 53 | $data[$key] = []; |
| 54 | } |
| 55 | $data =& $data[$key]; |
| 56 | } |
| 57 | $data = $value; |
| 58 | } |
| 59 | |
| 60 | #[\ReturnTypeWillChange] |
| 61 | public function offsetGet( $offset ) { |
| 62 | $data =& $this->data; |
| 63 | foreach ( (array)$offset as $key ) { |
| 64 | if ( !isset( $data[$key] ) ) { |
| 65 | throw new \OutOfBoundsException( 'Does not exist' ); |
| 66 | } elseif ( !is_array( $data ) ) { |
| 67 | throw new \OutOfBoundsException( "Requested offset {$key} (full offset " . implode( ':', $offset ) . |
| 68 | "), but $data is not an array." ); |
| 69 | } |
| 70 | $data =& $data[$key]; |
| 71 | } |
| 72 | return $data; |
| 73 | } |
| 74 | |
| 75 | public function offsetUnset( $offset ): void { |
| 76 | $offset = (array)$offset; |
| 77 | // while loop is required to not leave behind empty arrays |
| 78 | $first = true; |
| 79 | while ( $offset ) { |
| 80 | $end = array_pop( $offset ); |
| 81 | $data =& $this->data; |
| 82 | foreach ( $offset as $key ) { |
| 83 | if ( !isset( $data[$key] ) ) { |
| 84 | return; |
| 85 | } |
| 86 | $data =& $data[$key]; |
| 87 | } |
| 88 | if ( $first === true || ( is_array( $data[$end] ) && !count( $data[$end] ) ) ) { |
| 89 | unset( $data[$end] ); |
| 90 | $first = false; |
| 91 | } |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | public function offsetExists( $offset ): bool { |
| 96 | $data =& $this->data; |
| 97 | foreach ( (array)$offset as $key ) { |
| 98 | if ( !isset( $data[$key] ) ) { |
| 99 | return false; |
| 100 | } elseif ( !is_array( $data ) ) { |
| 101 | throw new \OutOfBoundsException( "Requested offset {$key} (full offset " . implode( ':', $offset ) . |
| 102 | "), but $data is not an array." ); |
| 103 | } |
| 104 | $data =& $data[$key]; |
| 105 | } |
| 106 | return true; |
| 107 | } |
| 108 | } |