Added avatar image upload

1 files changed, 172 insertions, 0 deletions

diff --git a/app/Core/Thumbnail.php b/app/Core/Thumbnail.php
new file mode 100644
index 00000000..733d3a3c
--- /dev/null
+++ b/app/Core/Thumbnail.php
@@ -0,0 +1,172 @@
+<?php
+
+namespace Kanboard\Core;
+
+/**
+ * Thumbnail Generator
+ *
+ * @package core
+ * @author  Frederic Guillot
+ */
+class Thumbnail
+{
+    protected $metadata = array();
+    protected $srcImage;
+    protected $dstImage;
+
+    /**
+     * Create a thumbnail from a local file
+     *
+     * @static
+     * @access public
+     * @param  string $filename
+     * @return Thumbnail
+     */
+    public static function createFromFile($filename)
+    {
+        $self = new static();
+        $self->fromFile($filename);
+        return $self;
+    }
+
+    /**
+     * Create a thumbnail from a string
+     *
+     * @static
+     * @access public
+     * @param  string $blob
+     * @return Thumbnail
+     */
+    public static function createFromString($blob)
+    {
+        $self = new static();
+        $self->fromString($blob);
+        return $self;
+    }
+
+    /**
+     * Load the local image file in memory with GD
+     *
+     * @access public
+     * @param  string $filename
+     * @return Thumbnail
+     */
+    public function fromFile($filename)
+    {
+        $this->metadata = getimagesize($filename);
+        $this->srcImage = imagecreatefromstring(file_get_contents($filename));
+        return $this;
+    }
+
+    /**
+     * Load the image blob in memory with GD
+     *
+     * @access public
+     * @param  string $blob
+     * @return Thumbnail
+     */
+    public function fromString($blob)
+    {
+        if (!function_exists('getimagesizefromstring')) {
+            $uri = 'data://application/octet-stream;base64,' . base64_encode($blob);
+            $this->metadata = getimagesize($uri);
+        } else {
+            $this->metadata = getimagesizefromstring($blob);
+        }
+
+        $this->srcImage = imagecreatefromstring($blob);
+        return $this;
+    }
+
+    /**
+     * Resize the image
+     *
+     * @access public
+     * @param  int $width
+     * @param  int $height
+     * @return Thumbnail
+     */
+    public function resize($width = 250, $height = 100)
+    {
+        $srcWidth = $this->metadata[0];
+        $srcHeight = $this->metadata[1];
+        $dstX = 0;
+        $dstY = 0;
+
+        if ($width == 0 && $height == 0) {
+            $width = 100;
+            $height = 100;
+        }
+
+        if ($width > 0 && $height == 0) {
+            $dstWidth = $width;
+            $dstHeight = floor($srcHeight * ($width / $srcWidth));
+            $this->dstImage = imagecreatetruecolor($dstWidth, $dstHeight);
+        } elseif ($width == 0 && $height > 0) {
+            $dstWidth = floor($srcWidth * ($height / $srcHeight));
+            $dstHeight = $height;
+            $this->dstImage = imagecreatetruecolor($dstWidth, $dstHeight);
+        } else {
+            $srcRatio = $srcWidth / $srcHeight;
+            $resizeRatio = $width / $height;
+
+            if ($srcRatio <= $resizeRatio) {
+                $dstWidth = $width;
+                $dstHeight = floor($srcHeight * ($width / $srcWidth));
+                $dstY = ($dstHeight - $height) / 2 * (-1);
+            } else {
+                $dstWidth = floor($srcWidth * ($height / $srcHeight));
+                $dstHeight = $height;
+                $dstX = ($dstWidth - $width) / 2 * (-1);
+            }
+
+            $this->dstImage = imagecreatetruecolor($width, $height);
+        }
+
+        imagecopyresampled($this->dstImage, $this->srcImage, $dstX, $dstY, 0, 0, $dstWidth, $dstHeight, $srcWidth, $srcHeight);
+
+        return $this;
+    }
+
+    /**
+     * Save the thumbnail to a local file
+     *
+     * @access public
+     * @param  string $filename
+     * @return Thumbnail
+     */
+    public function toFile($filename)
+    {
+        imagejpeg($this->dstImage, $filename);
+        imagedestroy($this->dstImage);
+        imagedestroy($this->srcImage);
+        return $this;
+    }
+
+    /**
+     * Return the thumbnail as a string
+     *
+     * @access public
+     * @return string
+     */
+    public function toString()
+    {
+        ob_start();
+        imagejpeg($this->dstImage, null);
+        imagedestroy($this->dstImage);
+        imagedestroy($this->srcImage);
+        return ob_get_clean();
+    }
+
+    /**
+     * Output the thumbnail directly to the browser or stdout
+     *
+     * @access public
+     */
+    public function toOutput()
+    {
+        imagejpeg($this->dstImage, null);
+        imagedestroy($this->dstImage);
+        imagedestroy($this->srcImage);
+    }
+}