Add Entity-Attribute-Value (EAV) pattern

More/EAV/example.php

@@ -0,0 +1,68 @@
+<?php
+
+use DesignPatterns\More\EAV\Entity;
+use DesignPatterns\More\EAV\Attribute;
+use DesignPatterns\More\EAV\Value;
+
+// color attribute
+$color = (new Attribute())->setName('Color');
+// color values
+$colorSilver    = (new Value($color))->setName('Silver');
+$colorGold      = (new Value($color))->setName('Gold');
+$colorSpaceGrey = (new Value($color))->setName('Space Grey');
+
+// memory attribute
+$memory  = (new Attribute())->setName('Memory');
+// memory values
+$memory4Gb  = (new Value($memory))->setName('4GB');
+$memory8Gb  = (new Value($memory))->setName('8GB');
+$memory16Gb = (new Value($memory))->setName('16GB');
+
+// storage attribute
+$storage  = (new Attribute())->setName('Storage');
+// storage values
+$storage128Gb   = (new Value($storage))->setName('128GB');
+$storage256Gb   = (new Value($storage))->setName('256GB');
+$storage512Gb   = (new Value($storage))->setName('512GB');
+$storage1Tb     = (new Value($storage))->setName('1TB');
+
+// entities
+$mac = (new Entity())
+    ->setName('MacBook')
+    // colors
+    ->addValue($colorSilver)
+    ->addValue($colorGold)
+    ->addValue($colorSpaceGrey)
+    // memories
+    ->addValue($memory8Gb)
+    // storages
+    ->addValue($storage256Gb)
+    ->addValue($storage512Gb)
+;
+
+$macAir = (new Entity())
+    ->setName('MacBook Air')
+    // colors
+    ->addValue($colorSilver)
+    // memories
+    ->addValue($memory4Gb)
+    ->addValue($memory8Gb)
+    // storages
+    ->addValue($storage128Gb)
+    ->addValue($storage256Gb)
+    ->addValue($storage512Gb)
+;
+
+$macPro = (new Entity())
+    ->setName('MacBook Pro')
+    // colors
+    ->addValue($colorSilver)
+    // memories
+    ->addValue($memory8Gb)
+    ->addValue($memory16Gb)
+    // storages
+    ->addValue($storage128Gb)
+    ->addValue($storage256Gb)
+    ->addValue($storage512Gb)
+    ->addValue($storage1Tb)
+;