implementation d'une classe de collection

src/Collection.php

@@ -0,0 +1,86 @@
+<?php
+
+namespace Kletellier\PdoWrapper;
+
+use ArrayIterator;
+use IteratorAggregate;
+use Traversable;
+
+class Collection implements IteratorAggregate
+{
+    private array $elements;
+
+    public function __construct(array $elements = [])
+    {
+        $this->elements = $elements;
+    }
+
+    public function first(): mixed
+    {
+        return reset($this->elements);
+    }
+
+    public function last(): mixed
+    {
+        return end($this->elements);
+    }
+
+    public function count(): int
+    {
+        return count($this->elements);
+    }
+
+    public function clear(): bool
+    {
+        $this->elements = [];
+        return count($this->elements) == 0;
+    }
+
+    public function reduce(callable $fn, mixed $initial): mixed
+    {
+        return array_reduce($this->elements, $fn, $initial);
+    }
+
+    public function map(callable $fn): Collection
+    {
+        $tmp = array_map($fn, $this->elements);
+        return new Collection($tmp);
+    }
+
+    public function each(callable $fn): void
+    {
+        array_walk($this->elements, $fn);
+    }
+
+    public function filter(callable $fn): Collection
+    {
+        $tmp = array_filter($this->elements, $fn, ARRAY_FILTER_USE_BOTH);
+        $collect = new Collection($tmp);
+        return $collect;
+    }
+
+    public function empty(): bool
+    {
+        return empty($this->elements);
+    }
+
+    public function add(mixed $element): void
+    {
+        $this->elements[] = $element;
+    }
+
+    public function values(): array
+    {
+        return array_values($this->elements);
+    }
+
+    public function items(): array
+    {
+        return $this->elements;
+    }
+
+    public function getIterator(): Traversable
+    {
+        return new ArrayIterator($this->elements);
+    }
+}