155 lines
4.2 KiB
PHP
155 lines
4.2 KiB
PHP
<?php
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namespace Gregwar\CaptchaBundle\Generator;
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use Symfony\Component\Finder\Finder;
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use Symfony\Component\HttpFoundation\Session\SessionInterface;
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use Symfony\Component\Routing\RouterInterface;
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use Gregwar\Captcha\CaptchaBuilderInterface;
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use Gregwar\Captcha\PhraseBuilderInterface;
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/**
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* Uses configuration parameters to call the services that generate captcha images
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*
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* @author Gregwar <g.passault@gmail.com>
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* @author Jeremy Livingston <jeremy.j.livingston@gmail.com>
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*/
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class CaptchaGenerator
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{
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/**
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* @var \Symfony\Component\Routing\RouterInterface
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*/
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protected $router;
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/**
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* @var CaptchaBuilder
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*/
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protected $builder;
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/**
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* @var PhraseBuilder
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*/
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protected $phraseBuilder;
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/**
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* @var ImageFileHandler
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*/
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protected $imageFileHandler;
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/**
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* @param \Symfony\Component\Routing\RouterInterface $router
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* @param CaptchaBuilderInterface $builder
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* @param ImageFileHandlerInterface $imageFileHandler
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*/
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public function __construct(RouterInterface $router, CaptchaBuilderInterface $builder, PhraseBuilderInterface $phraseBuilder, ImageFileHandler $imageFileHandler)
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{
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$this->router = $router;
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$this->builder = $builder;
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$this->phraseBuilder = $phraseBuilder;
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$this->imageFileHandler = $imageFileHandler;
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}
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/**
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* Get the captcha URL, stream, or filename that will go in the image's src attribute
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*
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* @param $key
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* @param array $options
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*
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* @return array
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*/
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public function getCaptchaCode(array &$options)
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{
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$this->builder->setPhrase($this->getPhrase($options));
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// Randomly execute garbage collection and returns the image filename
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if ($options['as_file']) {
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$this->imageFileHandler->collectGarbage();
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return $this->generate($options);
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}
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// Returns the image generation URL
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if ($options['as_url']) {
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return $this->router->generate('gregwar_captcha.generate_captcha', array('key' => $options['session_key']));
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}
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return 'data:image/jpeg;base64,' . base64_encode($this->generate($options));
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}
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/**
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* Sets the phrase to the builder
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*/
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public function setPhrase($phrase)
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{
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$this->builder->setPhrase($phrase);
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}
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/**
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* @param string $key
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* @param array $options
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*
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* @return string
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*/
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public function generate(array &$options)
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{
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$this->builder->setDistortion($options['distortion']);
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$this->builder->setMaxFrontLines($options['max_front_lines']);
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$this->builder->setMaxBehindLines($options['max_behind_lines']);
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if ($options['background_color'] != array()) {
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if (count($options['background_color'])!=3) {
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throw new \RuntimeException('background_color should be an array of r, g and b');
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}
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$color = $options['background_color'];
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$this->builder->setBackgroundColor($color[0], $color[1], $color[2]);
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}
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$this->builder->setInterpolation($options['interpolation']);
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$fingerprint = isset($options['fingerprint']) ? $options['fingerprint'] : null;
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$content = $this->builder->build(
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$options['width'],
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$options['height'],
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$options['font'],
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$fingerprint
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)->getGd();
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if ($options['keep_value']) {
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$options['fingerprint'] = $this->builder->getFingerprint();
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}
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if (!$options['as_file']) {
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ob_start();
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imagejpeg($content, null, $options['quality']);
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return ob_get_clean();
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}
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return $this->imageFileHandler->saveAsFile($content);
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}
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/**
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* @param string $key
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* @param array $options
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*
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* @return string
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*/
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public function getPhrase(array &$options)
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{
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// Get the phrase that we'll use for this image
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if ($options['keep_value'] && isset($options['phrase'])) {
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$phrase = $options['phrase'];
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} else {
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$phrase = $this->phraseBuilder->build($options['length'], $options['charset']);
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$options['phrase'] = $phrase;
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}
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return $phrase;
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}
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}
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