/**
* Load bookcover from cache or remote provider and display if possible.
*
* @return bool True if image loaded, false on failure.
*/
protected function fetchFromAPI()
{
// Check that we have at least one valid identifier:
$ids = $this->getIdentifiers();
if (empty($ids)) {
return false;
}
// Set up local file path:
$this->localFile = $this->determineLocalFile($ids);
if (is_readable($this->localFile)) {
// Load local cache if available
$this->contentType = 'image/jpeg';
$this->image = file_get_contents($this->localFile);
return true;
} else {
if (isset($this->config->Content->coverimages)) {
$providers = explode(',', $this->config->Content->coverimages);
foreach ($providers as $provider) {
$provider = explode(':', trim($provider));
$apiName = strtolower(trim($provider[0]));
$key = isset($provider[1]) ? trim($provider[1]) : null;
try {
$handler = $this->apiManager->get($apiName);
// Is the current provider appropriate for the available data?
if ($handler->supports($ids)) {
if ($url = $handler->getUrl($key, $this->size, $ids)) {
$success = $this->processImageURLForSource($url, $handler->isCacheAllowed(), $apiName);
if ($success) {
return true;
}
}
}
} catch (\Exception $e) {
$this->debug(get_class($e) . ' during processing of ' . $apiName . ': ' . $e->getMessage());
}
}
}
}
return false;
}
