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| 1 | <?php |
| 2 | |
| 3 | namespace Miniframe\ORM\Collection; |
| 4 | |
| 5 | use Miniframe\Core\Registry; |
| 6 | use Miniframe\ORM\Middleware\ORM; |
| 7 | |
| 8 | class OneToMany implements \ArrayAccess, \Iterator, \Countable |
| 9 | { |
| 10 | /** |
| 11 | * The actual collection |
| 12 | * |
| 13 | * @var array|null |
| 14 | */ |
| 15 | protected $collection = null; |
| 16 | /** |
| 17 | * Position within the array |
| 18 | * |
| 19 | * @var int|string|null |
| 20 | */ |
| 21 | protected $position = null; |
| 22 | |
| 23 | /** |
| 24 | * Name of the type of entities in this collection |
| 25 | * |
| 26 | * @var string |
| 27 | */ |
| 28 | protected $entityClassName; |
| 29 | /** |
| 30 | * Name of the column that should match $columnValue |
| 31 | * |
| 32 | * @var string |
| 33 | */ |
| 34 | protected $columnName; |
| 35 | /** |
| 36 | * The value that should be in $columnName |
| 37 | * |
| 38 | * @var mixed |
| 39 | */ |
| 40 | protected $columnValue; |
| 41 | |
| 42 | /** |
| 43 | * Collection object for a OneToMany join |
| 44 | * |
| 45 | * @param string $entityClassName Name of the type of entities in this collection. |
| 46 | * @param string $columnName Name of the column that should match $columnValue. |
| 47 | * @param mixed $columnValue The value that should be in $columnName. |
| 48 | */ |
| 49 | public function __construct(string $entityClassName, string $columnName, $columnValue) |
| 50 | { |
| 51 | $this->entityClassName = $entityClassName; |
| 52 | $this->columnName = $columnName; |
| 53 | $this->columnValue = $columnValue; |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Prepares the data collection when it's accessed for the first time |
| 58 | * |
| 59 | * @return void |
| 60 | */ |
| 61 | protected function prepare(): void |
| 62 | { |
| 63 | if ($this->collection !== null) { |
| 64 | return; |
| 65 | } |
| 66 | $this->collection = Registry::get(ORM::class) |
| 67 | ->getRepository($this->entityClassName) |
| 68 | ->findBy([$this->columnName => $this->columnValue]); |
| 69 | |
| 70 | $this->rewind(); |
| 71 | } |
| 72 | |
| 73 | /** |
| 74 | * ArrayAccess::offsetExists — Whether an offset exists |
| 75 | * |
| 76 | * @param mixed $offset An offset to check for. |
| 77 | * |
| 78 | * @return boolean |
| 79 | */ |
| 80 | public function offsetExists($offset): bool |
| 81 | { |
| 82 | $this->prepare(); |
| 83 | return isset($this->collection[$offset]); // @TODO maybe use array_key_exists ? |
| 84 | } |
| 85 | |
| 86 | /** |
| 87 | * ArrayAccess::offsetGet — Offset to retrieve |
| 88 | * |
| 89 | * @param mixed $offset The offset to retrieve. |
| 90 | * |
| 91 | * @return mixed |
| 92 | */ |
| 93 | public function offsetGet($offset) |
| 94 | { |
| 95 | $this->prepare(); |
| 96 | return $this->collection[$offset]; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * ArrayAccess::offsetSet — Assign a value to the specified offset |
| 101 | * |
| 102 | * @param mixed $offset The offset to assign the value to. |
| 103 | * @param mixed $value The value to set. |
| 104 | * |
| 105 | * @return void |
| 106 | */ |
| 107 | public function offsetSet($offset, $value): void |
| 108 | { |
| 109 | $this->prepare(); |
| 110 | if (is_null($offset)) { |
| 111 | $this->collection[] = $value; |
| 112 | } else { |
| 113 | $this->collection[$offset] = $value; |
| 114 | } |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * ArrayAccess::offsetUnset — Unset an offset |
| 119 | * |
| 120 | * @param mixed $offset The offset to unset. |
| 121 | * |
| 122 | * @return void |
| 123 | */ |
| 124 | public function offsetUnset($offset): void |
| 125 | { |
| 126 | $this->prepare(); |
| 127 | unset($this->collection[$offset]); |
| 128 | } |
| 129 | |
| 130 | /** |
| 131 | * Iterator::current — Return the current element |
| 132 | * |
| 133 | * @return mixed |
| 134 | */ |
| 135 | public function current() |
| 136 | { |
| 137 | $this->prepare(); |
| 138 | return $this->collection[$this->position] ?? null; |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * Iterator::next — Move forward to next element |
| 143 | * |
| 144 | * @return void |
| 145 | */ |
| 146 | public function next(): void |
| 147 | { |
| 148 | $this->prepare(); |
| 149 | $keys = array_keys($this->collection); |
| 150 | $index = array_search($this->position, $keys) + 1; |
| 151 | $this->position = $keys[$index] ?? null; |
| 152 | } |
| 153 | |
| 154 | /** |
| 155 | * Iterator::key — Return the key of the current element |
| 156 | * |
| 157 | * @return mixed |
| 158 | */ |
| 159 | public function key() |
| 160 | { |
| 161 | $this->prepare(); |
| 162 | return $this->position; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Iterator::valid — Checks if current position is valid |
| 167 | * |
| 168 | * @return boolean |
| 169 | */ |
| 170 | public function valid(): bool |
| 171 | { |
| 172 | $this->prepare(); |
| 173 | return $this->position !== null; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Iterator::rewind — Rewind the Iterator to the first element |
| 178 | * |
| 179 | * @return void |
| 180 | */ |
| 181 | public function rewind(): void |
| 182 | { |
| 183 | $this->prepare(); |
| 184 | $this->position = array_key_first($this->collection); |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Countable::count — Count elements of an object |
| 189 | * |
| 190 | * @return integer |
| 191 | */ |
| 192 | public function count(): int |
| 193 | { |
| 194 | $this->prepare(); |
| 195 | return count($this->collection); |
| 196 | } |
| 197 | } |