118 lines
3.6 KiB
PHP
118 lines
3.6 KiB
PHP
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<?php
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namespace Graker\PhotoAlbums\Classes;
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use Graker\PhotoAlbums\Models\Photo;
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/**
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* Class MarkdownPhotoInsert
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* Parses Markdown text to replace [photo:123:640:480:auto] placeholders with links to actual images from photo gallery
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*
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* @package Graker\PhotoAlbums\Classes
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*/
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class MarkdownPhotoInsert {
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const PHOTO_A_REGEXP = '(href=\"(\[photo\:[0-9]+(?:\:[0-9]+\:[0-9]+(?:\:auto|\:exact|\:portrait|\:landscape|\:crop)?)?\])\")';
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const PHOTO_IMG_REGEXP = '(src=\"(\[photo\:[0-9]+(?:\:[0-9]+\:[0-9]+(?:\:auto|\:exact|\:portrait|\:landscape|\:crop)?)?\])\")';
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/**
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*
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* Replace [photo:123:640:480:auto] placeholders with links to actual images from photo gallery
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* where
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* - photo is a constant string
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* - 123 is a photo id
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* - 640:480 is an optional size of thumbnail to be created
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* - auto is an optional crop mode to be used
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* Placeholders are allowed (i.e. replaced) only inside `src=""` and `href=""`
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*
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* @param string $text original text
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* @param \stdClass $data contains text property with text processed so far
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*/
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public function parse($text, $data) {
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$images = array();
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$links = array();
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preg_match_all(self::PHOTO_A_REGEXP, $data->text, $links, PREG_SET_ORDER);
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preg_match_all(self::PHOTO_IMG_REGEXP, $data->text, $images, PREG_SET_ORDER);
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if (!empty($images)) {
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$data->text = $this->replaceMatches($images, $data->text);
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}
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if (!empty($links)) {
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$data->text = $this->replaceMatches($links, $data->text);
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}
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}
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/**
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*
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* Goes over all matches and replaces them in text
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* Returns processed text
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*
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* @param $matches
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* @param $text
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* @return mixed
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*/
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protected function replaceMatches($matches, $text) {
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foreach ($matches as $match) {
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list($entry, $placeholder) = $match;
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$replacement = $this->getReplacement($entry, $placeholder);
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$text = str_replace($entry, $replacement, $text);
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}
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return $text;
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}
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/**
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*
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* Returns replacement for text
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* (replaces [photo:id:width:height:mode] with resulting photo's image path)
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*
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* @param $entry
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* @param $placeholder
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* @return string
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*/
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protected function getReplacement($entry, $placeholder) {
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list($id, $width, $height, $mode) = $this->getPhotoParams($placeholder);
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$photo = Photo::where('id', $id)
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->with('image')
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->first();
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if (!$photo) {
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return $placeholder;
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} else {
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if ($width && $height) {
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$path = $photo->image->getThumb($width, $height, ['mode' => $mode]);
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} else {
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$path = $photo->image->path;
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}
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return str_replace($placeholder, $path, $entry);
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}
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}
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/**
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*
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* Parses parameters of image from the tag and returns them in array
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* [$id, $width, $height, $mode]
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* Width, height and mode are optional and will return 0 and empty string
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* if omitted in the tag
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*
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* @param string $placeholder
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* @return array
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*/
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protected function getPhotoParams($placeholder) {
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// remove brackets
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$values = str_replace('[', '', $placeholder);
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$values = str_replace(']', '', $values);
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// get parameters
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$values = explode(':', $values);
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$id = $values[1];
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$width = isset($values[2]) ? $values[2] : 0;
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$height = isset($values[3]) ? $values[3] : 0;
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$mode = isset($values[4]) ? $values[4] : 'auto';
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return array($id, $width, $height, $mode);
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}
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}
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