Add Blurhash util

app/Util/Media/Blurhash.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace App\Util\Media;
+
+use App\Util\Blurhash\Blurhash as BlurhashEngine;
+use App\Media;
+
+class Blurhash {
+
+	public static function generate(Media $media)
+	{
+		if(!in_array($media->mime, ['image/png', 'image/jpeg'])) {
+			return;
+		}
+
+		$file  = storage_path('app/' . $media->thumbnail_path);
+
+		if(!is_file($file)) {
+			return;
+		}
+
+		$image = imagecreatefromstring(file_get_contents($file));
+		$width = imagesx($image);
+		$height = imagesy($image);
+
+		$pixels = [];
+		for ($y = 0; $y < $height; ++$y) {
+			$row = [];
+			for ($x = 0; $x < $width; ++$x) {
+				$index = imagecolorat($image, $x, $y);
+				$colors = imagecolorsforindex($image, $index);
+
+				$row[] = [$colors['red'], $colors['green'], $colors['blue']];
+			}
+			$pixels[] = $row;
+		}
+
+		$components_x = 4;
+		$components_y = 4;
+		$blurhash = BlurhashEngine::encode($pixels, $components_x, $components_y);
+		if(strlen($blurhash) > 191) {
+			return;
+		}
+		return $blurhash;
+	}
+
+}