core\images\Resize

Complexity

Total Complexity

32

Size/Duplication

Total Lines	251
Duplicated Lines	3.98 %

Coupling/Cohesion

Components	1
Dependencies	0

Importance

Changes	1
Bugs	0	Features	0

<?php
		Class Resize
		{
			// *** Class variables
			private $image;
			private $width;
			private $height;
			private $imageResized;

			/**
			 * Resize constructor.
			 * @param null|string $fileName
			 */
			public function __construct($fileName)
			{
				// *** Open up the file
				$this->image = $this->openImage($fileName);

				// *** Get width and height
				$this->width  = imagesx($this->image);
				$this->height = imagesy($this->image);
			}

			## --------------------------------------------------------
			/**
			 * @param null|string $file
			 * @return bool|resource
			 */
			private function openImage($file)
			{
				// *** Get extension
				$extension = strtolower(strrchr($file, '.'));

				switch ($extension)
				{
					case '.jpg':
					case '.jpeg':
						$img = @imagecreatefromjpeg($file);
						break;
					case '.gif':
						$img = @imagecreatefromgif($file);
						break;
					case '.png':
						$img = @imagecreatefrompng($file);
						break;
					default:
						$img = false;
						break;
				}
				return $img;
			}

			## --------------------------------------------------------

			public function resizeImage($newWidth, $newHeight, $option = "auto")
			{
				// *** Get optimal width and height - based on $option
				$optionArray = $this->getDimensions($newWidth, $newHeight, $option);

				$optimalWidth  = $optionArray['optimalWidth'];
				$optimalHeight = $optionArray['optimalHeight'];


				// *** Resample - create image canvas of x, y size
				$this->imageResized = imagecreatetruecolor($optimalWidth, $optimalHeight);
				imagecopyresampled($this->imageResized, $this->image, 0, 0, 0, 0, $optimalWidth, $optimalHeight, $this->width, $this->height);


				// *** if option is 'crop', then crop too
				if ($option == 'crop') {
					$this->crop($optimalWidth, $optimalHeight, $newWidth, $newHeight);
				}
			}

			## --------------------------------------------------------
			/**
			 * @param $newWidth
			 * @param $newHeight
			 * @param string $option
			 * @return array
			 */
			private function getDimensions($newWidth, $newHeight, $option)
			{

			   switch ($option)
				{
					case 'exact':
						$optimalWidth = $newWidth;
						$optimalHeight = $newHeight;
						break;
					case 'portrait':
						$optimalWidth = $this->getSizeByFixedHeight($newHeight);
						$optimalHeight = $newHeight;
						break;
					case 'landscape':
						$optimalWidth = $newWidth;
						$optimalHeight = $this->getSizeByFixedWidth($newWidth);
						break;
					case 'auto':
						$optionArray = $this->getSizeByAuto($newWidth, $newHeight);
						$optimalWidth = $optionArray['optimalWidth'];
						$optimalHeight = $optionArray['optimalHeight'];
						break;
					case 'crop':
						$optionArray = $this->getOptimalCrop($newWidth, $newHeight);
						$optimalWidth = $optionArray['optimalWidth'];
						$optimalHeight = $optionArray['optimalHeight'];
						break;
				   default:
					   $optimalWidth = "";
					   $optimalHeight = "";
					   break;
				}
				return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
			}

			## --------------------------------------------------------

			private function getSizeByFixedHeight($newHeight)
			{
				$ratio = $this->width / $this->height;
				$newWidth = $newHeight * $ratio;
				return $newWidth;
			}

			private function getSizeByFixedWidth($newWidth)
			{
				$ratio = $this->height / $this->width;
				$newHeight = $newWidth * $ratio;
				return $newHeight;
			}

			private function getSizeByAuto($newWidth, $newHeight)
			{
				if ($this->height < $this->width) {
								// *** Image to be resized is wider (landscape)
				{
					$optimalWidth = $newWidth;
				}
					$optimalHeight = $this->getSizeByFixedWidth($newWidth);
				} elseif ($this->height > $this->width) {
								// *** Image to be resized is taller (portrait)
				{
					$optimalWidth = $this->getSizeByFixedHeight($newHeight);
				}
					$optimalHeight = $newHeight;
				} else
				// *** Image to be resizerd is a square
				{
					if ($newHeight < $newWidth) {
						$optimalWidth = $newWidth;
						$optimalHeight = $this->getSizeByFixedWidth($newWidth);
					} else if ($newHeight > $newWidth) {
						$optimalWidth = $this->getSizeByFixedHeight($newHeight);
						$optimalHeight = $newHeight;
					} else {
						// *** Sqaure being resized to a square
						$optimalWidth = $newWidth;
						$optimalHeight = $newHeight;
					}
				}

				return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
			}

			## --------------------------------------------------------

			private function getOptimalCrop($newWidth, $newHeight)
			{

				$heightRatio = $this->height / $newHeight;
				$widthRatio  = $this->width / $newWidth;

				if ($heightRatio < $widthRatio) {
					$optimalRatio = $heightRatio;
				} else {
					$optimalRatio = $widthRatio;
				}

				$optimalHeight = $this->height / $optimalRatio;
				$optimalWidth  = $this->width / $optimalRatio;

				return array('optimalWidth' => $optimalWidth, 'optimalHeight' => $optimalHeight);
			}

			## --------------------------------------------------------

			private function crop($optimalWidth, $optimalHeight, $newWidth, $newHeight)
			{
				// *** Find center - this will be used for the crop
				$cropStartX = ($optimalWidth / 2) - ($newWidth / 2);
				$cropStartY = ($optimalHeight / 2) - ($newHeight / 2);

				$crop = $this->imageResized;

				// *** Now crop from center to exact requested size
				$this->imageResized = imagecreatetruecolor($newWidth, $newHeight);
				imagecopyresampled($this->imageResized, $crop, 0, 0, $cropStartX, $cropStartY, $newWidth, $newHeight, $newWidth, $newHeight);
			}

			## --------------------------------------------------------
			/**
			 * @param string $savePath
			 * @param string $imageQuality
			 */
			public function saveImage($savePath, $imageQuality = "100")
			{
				// *** Get extension
				$extension = strrchr($savePath, '.');
	   			$extension = strtolower($extension);

				switch ($extension)
				{
					case '.jpg':
					case '.jpeg':
						if (imagetypes() & IMG_JPG) {
							imagejpeg($this->imageResized, $savePath, $imageQuality);
						}
						break;

					case '.gif':
						if (imagetypes() & IMG_GIF) {
							imagegif($this->imageResized, $savePath);
						}
						break;

					case '.png':
						// *** Scale quality from 0-100 to 0-9
						$scaleQuality = round(($imageQuality / 100) * 9);

						// *** Invert quality setting as 0 is best, not 9
						$invertScaleQuality = 9 - $scaleQuality;

						if (imagetypes() & IMG_PNG) {
							 imagepng($this->imageResized, $savePath, $invertScaleQuality);
						}
						break;

					// ... etc

					default:
						// *** No extension - No save.
						break;
				}

				imagedestroy($this->imageResized);
			}


			## --------------------------------------------------------

		}