Size, e.g. of image

src/Exception/ValueObject/InvalidSizeDimensionsException.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\Exception\ValueObject;
+
+/**
+ * An exception used while dimensions of size, passed to the instance of Size class, are invalid
+ *
+ * @author    Meritoo <github@meritoo.pl>
+ * @copyright Meritoo <http://www.meritoo.pl>
+ */
+class InvalidSizeDimensionsException extends \Exception
+{
+    /**
+     * Creates exception
+     *
+     * @param int $width  The width
+     * @param int $height The height
+     * @return InvalidSizeDimensionsException
+     */
+    public static function create($width, $height)
+    {
+        $template = 'Dimensions of size should be positive, but they are not: %d, %d. Is there everything ok?';
+        $message = sprintf($template, $width, $height);
+
+        return new static($message);
+    }
+}

src/Utilities/Regex.php

@@ -40,6 +40,18 @@ class Regex
         'color'            => '/^[a-f0-9]{6}$/i',
         'bundleName'       => '/^(([A-Z]{1}[a-z0-9]+)((?2))*)(Bundle)$/',
         'binaryValue'      => '/[^\x20-\x7E\t\r\n]/',
+
+        /*
+         * Matches:
+         * - "200x125"
+         * - "200 x 125"
+         * - "200 x   125"
+         * - "   200 x   125"
+         * - "   200   x 125   "
+         *
+         * Contains "%s" that should be replaced with separator used to split width and height.
+         */
+        'size'             => '/^[\ ]*(\d+)[\ ]*%s[\ ]*(\d+)[\ ]*$/',
     ];
 
     /**
@@ -920,6 +932,56 @@ class Regex
         return (bool)preg_match($pattern, $value);
     }
 
+    /**
+     * Returns pattern used to validate / verify size
+     *
+     * @param string $separator (optional) Separator used to split width and height. Default: " x ".
+     * @return string
+     */
+    public static function getSizePattern($separator = ' x ')
+    {
+        $escapeMe = [
+            '/',
+            '|',
+            '.',
+            '(',
+            ')',
+            '[',
+            ']',
+        ];
+
+        $cleanSeparator = trim($separator);
+
+        if (in_array($cleanSeparator, $escapeMe, true)) {
+            // I have to escape special character of  regular expression that may be used as separator
+            $separator = str_replace($cleanSeparator, '\\' . $cleanSeparator, $separator);
+        }
+
+        return sprintf(self::$patterns['size'], $separator);
+    }
+
+    /**
+     * Returns information if given value is a size value
+     *
+     * @param string $value     Value to verify
+     * @param string $separator (optional) Separator used to split width and height. Default: " x ".
+     * @return bool
+     */
+    public static function isSizeValue($value, $separator = ' x ')
+    {
+        /*
+         * Not a string?
+         * Nothing to do
+         */
+        if (!is_string($value)) {
+            return false;
+        }
+
+        $pattern = self::getSizePattern($separator);
+
+        return (bool)preg_match($pattern, $value);
+    }
+
     /**
      * Returns slug for given value
      *

src/ValueObject/Size.php

@@ -0,0 +1,245 @@
+<?php
+
+/**
+ * (c) Meritoo.pl, http://www.meritoo.pl
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Meritoo\Common\ValueObject;
+
+use Meritoo\Common\Exception\ValueObject\InvalidSizeDimensionsException;
+use Meritoo\Common\Utilities\Regex;
+
+/**
+ * Size, e.g. of image
+ *
+ * Instance of this class may be created using static methods:
+ * - fromString()
+ * - fromArray()
+ *
+ * @author    Meritoo <github@meritoo.pl>
+ * @copyright Meritoo <http://www.meritoo.pl>
+ */
+class Size
+{
+    /**
+     * The width
+     *
+     * @var int
+     */
+    protected $width;
+
+    /**
+     * The height
+     *
+     * @var int
+     */
+    protected $height;
+
+    /**
+     * Unit used when width or height should be returned with unit
+     *
+     * @var string
+     */
+    protected $unit;
+
+    /**
+     * Separator used when converting to string
+     *
+     * @var string
+     */
+    protected $separator = ' x ';
+
+    /**
+     * Class constructor
+     *
+     * @param int    $width  (optional) The width
+     * @param int    $height (optional) The height
+     * @param string $unit   (optional) Unit used when width or height should be returned with unit. Default: "px".
+     *
+     * @throws InvalidSizeDimensionsException
+     */
+    private function __construct($width = null, $height = null, $unit = 'px')
+    {
+        $width = (int)$width;
+        $height = (int)$height;
+
+        if ($width < 0 || $height < 0) {
+            throw new InvalidSizeDimensionsException($width, $height);
+        }
+
+        $this
+            ->setWidth($width)
+            ->setHeight($height)
+        ;
+
+        $this->unit = $unit;
+    }
+
+    /**
+     * Returns string representation of instance of this class in human readable format, e.g. '200 x 100'
+     *
+     * @return string
+     */
+    public function __toString()
+    {
+        return $this->toString();
+    }
+
+    /**
+     * Sets separator used when converting to string
+     *
+     * @param string $separator The separator
+     * @return Size
+     */
+    public function setSeparator($separator)
+    {
+        $this->separator = $separator;
+
+        return $this;
+    }
+
+    /**
+     * Returns the width
+     *
+     * @param bool $withUnit (optional) If is set to true, width is returned with unit ("px"). Otherwise - without
+     *                       (default behaviour).
+     * @return int|string
+     */
+    public function getWidth($withUnit = false)
+    {
+        if ($withUnit) {
+            return sprintf('%d %s', $this->width, $this->unit);
+        }
+
+        return $this->width;
+    }
+
+    /**
+     * Sets the width
+     *
+     * @param int|string $width The width
+     * @return Size
+     */
+    public function setWidth($width)
+    {
+        $this->width = (int)$width;
+
+        return $this;
+    }
+
+    /**
+     * Returns the height
+     *
+     * @param bool $withUnit (optional) If is set to true, height is returned with unit ("px"). Otherwise - without
+     *                       (default behaviour).
+     * @return int|string
+     */
+    public function getHeight($withUnit = false)
+    {
+        if ($withUnit) {
+            return sprintf('%d %s', $this->height, $this->unit);
+        }
+
+        return $this->height;
+    }
+
+    /**
+     * Sets the height
+     *
+     * @param int $height The height
+     * @return Size
+     */
+    public function setHeight($height)
+    {
+        $this->height = (int)$height;
+
+        return $this;
+    }
+
+    /**
+     * Returns string representation of instance of this class, e.g. '200 x 100' or '200x100'
+     *
+     * @param bool $withUnit (optional) If is set to true, width and height are returned with unit ("px"). Otherwise
+     *                       - without (default behaviour).
+     * @return string
+     */
+    public function toString($withUnit = false)
+    {
+        $width = $this->getWidth($withUnit);
+        $height = $this->getHeight($withUnit);
+
+        return sprintf('%s%s%s', $width, $this->separator, $height);
+    }
+
+    /**
+     * Returns instance of this class as an array.
+     * Values of the array are width and height, eg. [800, 600] or ['800px', '600px'].
+     *
+     * @param bool $withUnits (optional) If is set to true, width and height are returned with unit ("px"). Otherwise
+     *                        - without (default behaviour).
+     * @return array
+     */
+    public function toArray($withUnits = false)
+    {
+        return [
+            $this->getWidth($withUnits),
+            $this->getHeight($withUnits),
+        ];
+    }
+
+    /**
+     * Creates new instance from given string
+     *
+     * @param string $size      The size represented as string (width and height separated by given separator)
+     * @param string $unit      (optional) Unit used when width or height should be returned with unit. Default: "px".
+     * @param string $separator (optional) Separator used to split width and height. Default: " x ".
+     * @return Size|null
+     */
+    public static function fromString($size, $unit = 'px', $separator = ' x ')
+    {
+        if (is_string($size)) {
+            $matches = [];
+            $pattern = Regex::getSizePattern($separator);
+
+            if ((bool)preg_match($pattern, $size, $matches)) {
+                $width = (int)$matches[1];
+                $height = (int)$matches[2];
+                $sizeObject = new self($width, $height, $unit);
+
+                return $sizeObject->setSeparator($separator);
+            }
+        }
+
+        return null;
+    }
+
+    /**
+     * Creates new instance from given array
+     *
+     * The array should contain 2 elements: width and height.
+     * Examples: ['800', '600'], [800, 600].
+     *
+     * @param array  $array The size represented as array
+     * @param string $unit  (optional) Unit used when width or height should be returned with unit. Default: "px".
+     * @return Size|null
+     */
+    public static function fromArray(array $array, $unit = 'px')
+    {
+        // Requirements for given array:
+        // - indexes "0" and "1"
+        // - should contains exactly 2 elements
+        if (
+            array_key_exists(0, $array)
+            && array_key_exists(1, $array)
+            && 2 === count($array)
+        ) {
+            list($width, $height) = $array;
+
+            return new self($width, $height, $unit);
+        }
+
+        return null;
+    }
+}