From c1d28d644130dc2660b0e148cd3eebe17392f7e1 Mon Sep 17 00:00:00 2001
From: vnmedeiros <vnicius.nm.ba@gmail.com>
Date: Thu, 17 Dec 2020 10:09:38 -0300
Subject: [PATCH] feat: add get image blurhash #456

---
 composer.json                                |  5 +--
 src/classes/entities/class-tainacan-item.php | 34 ++++++++++++++++++++
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/composer.json b/composer.json
index d03574e01..c6480e1ff 100644
--- a/composer.json
+++ b/composer.json
@@ -1,10 +1,11 @@
 {
-    "name": "medialabufg/tainacan",
+    "name": "tainacan/tainacan",
     "description": "Transforme seu site wordpress em um repositório digital.",
     "type": "wordpress-plugin",
     "require": {
         "respect/validation": "^1.1",
-        "smalot/pdfparser": "*"
+        "smalot/pdfparser": "*",
+        "kornrunner/blurhash": "^1.1"
     },
     "require-dev": {
         "squizlabs/php_codesniffer": "^2.2 || ^3.0.2",
diff --git a/src/classes/entities/class-tainacan-item.php b/src/classes/entities/class-tainacan-item.php
index db05c9d0d..17e179b35 100644
--- a/src/classes/entities/class-tainacan-item.php
+++ b/src/classes/entities/class-tainacan-item.php
@@ -130,13 +130,47 @@ class Item extends Entity {
 
 		array_unshift($sizes, 'full');
 
+		if( in_array('tainacan-small', $sizes ) ) {
+			$tmp_src = wp_get_attachment_image_src( $this->get__thumbnail_id(), 'tainacan-small' );
+			$blurhash = $this->get_iamge_blurhash($tmp_src[0], $tmp_src[1], $tmp_src[2]);
+		}
+
 		foreach ( $sizes as $size ) {
 			$thumbs[$size] = wp_get_attachment_image_src( $this->get__thumbnail_id(), $size );
+			$thumbs[$size][] = $blurhash;
 		}
 
 		return apply_filters("tainacan-item-get-thumbnail", $thumbs, $this);
 	}
 
+	private function get_iamge_blurhash($file_path, $width, $height) {
+		$image = imagecreatefromstring(file_get_contents($file_path));
+		if($image == false) 
+			return '';
+
+		$max_width = 45;
+		if( $width > $max_width ) {
+			$image = imagescale($image, $max_width);
+			$width = imagesx($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 = 3;
+		$blurhash = \kornrunner\Blurhash\Blurhash::encode($pixels, $components_x, $components_y);
+		return $blurhash;
+	}
+
 	/**
 	 * @param $id
 	 */