/**
* Return a scaled, cached version of the source image for front-end use
*
* @param string $json
* @param array $opts
* @param modTemplateVar $tv
* @internal param array $params
* @return string
*/
public function getImageURL($json, $opts = array(), modTemplateVar $tv)
{
// Check system settings for crop engine override
$engineClass = $this->modx->getOption('imageplus.crop_engine_class', null, false);
// Do some basic intelligent sniffing
if (!$engineClass) {
if (CropEngines\PhpThumbsUp::engineRequirementsMet($this->modx)) {
$engineClass = '\\ImagePlus\\CropEngines\\PhpThumbsUp';
} else {
if (CropEngines\PhpThumbOf::engineRequirementsMet($this->modx)) {
$engineClass = '\\ImagePlus\\CropEngines\\PhpThumbOf';
}
}
}
/**
* @var ImagePlus\CropEngines\AbstractCropEngine $cropEngine
*/
$cropEngine = new $engineClass($this->modx);
// Check crop engine is usable
if (!$cropEngine->engineRequirementsMet($this->modx)) {
$this->modx->log(xPDO::LOG_LEVEL_ERROR, "Requirements not met for crop engine [{$engineClass}]", '', 'Image+');
return 'Image+ error - requirements not met for crop engine';
}
return $cropEngine->getImageUrl($json, $opts, $tv);
}
/**
* Check dependencies and raise warnings if not met
*/
private function checkDependencies()
{
// Register a micro autoloader for in-house engines
spl_autoload_register(function ($className) {
if (strpos($className, 'ImagePlus\\CropEngines\\') === false) {
return;
}
$class = str_replace('ImagePlus\\CropEngines\\', '', $className);
$path = realpath(dirname(__FILE__) . '/../cropengines/' . $class . '.php');
if (is_readable($path)) {
include $path;
}
});
// Do some basic intelligent sniffing
if (!isset($this->options['cropEngineClass'])) {
if (CropEngines\PhpThumbsUp::engineRequirementsMet($this->modx)) {
$this->options['cropEngineClass'] = '\\ImagePlus\\CropEngines\\PhpThumbsUp';
} else {
if (CropEngines\PhpThumbOf::engineRequirementsMet($this->modx)) {
$this->options['cropEngineClass'] = '\\ImagePlus\\CropEngines\\PhpThumbOf';
}
}
if (!$this->options['cropEngineClass']) {
// Handle unmet dependencies
$this->options['hasUnmetDependencies'] = true;
return true;
}
}
$this->options['hasUnmetDependencies'] = false;
}