/**
* Test Invalid ISBN-10.
*
* @return void
*/
public function testInvalidISBN10()
{
// Invalid ISBN-10:
$isbn = new ISBN('2314346323');
$this->assertEquals($isbn->get10(), false);
$this->assertEquals($isbn->get13(), false);
$this->assertFalse($isbn->isValid());
}
/**
* Return the first valid ISBN found in the record (favoring ISBN-10 over
* ISBN-13 when possible).
*
* @return mixed
*/
public function getCleanISBN()
{
// Get all the ISBNs and initialize the return value:
$isbns = $this->getISBNs();
$isbn13 = false;
// Loop through the ISBNs:
foreach ($isbns as $isbn) {
// Strip off any unwanted notes:
if ($pos = strpos($isbn, ' ')) {
$isbn = substr($isbn, 0, $pos);
}
// If we find an ISBN-10, return it immediately; otherwise, if we find
// an ISBN-13, save it if it is the first one encountered.
$isbnObj = new ISBN($isbn);
if ($isbn10 = $isbnObj->get10()) {
return $isbn10;
}
if (!$isbn13) {
$isbn13 = $isbnObj->get13();
}
}
return $isbn13;
}
/**
* Load bookcover fom URL from cache or remote provider and display if possible.
*
* @return bool True if image displayed, false on failure.
*/
protected function fetchFromISBN()
{
if (empty($this->isn)) {
return false;
}
// We should check whether we have cached images for the 13- or 10-digit
// ISBNs. If no file exists, we'll favor the 10-digit number if
// available for the sake of brevity.
$isbn = new ISBN($this->isn);
if ($isbn->get13()) {
$this->localFile = $this->getCachePath($this->size, $isbn->get13());
} else {
// Invalid ISBN? Keep it as-is to avoid a bad file path; the error will
// be caught later down the line anyway.
$this->localFile = $this->getCachePath($this->size, $this->isn);
}
if (!is_readable($this->localFile) && $isbn->get10()) {
$this->localFile = $this->getCachePath($this->size, $isbn->get10());
}
if (is_readable($this->localFile)) {
// Load local cache if available
$this->contentType = 'image/jpeg';
$this->image = file_get_contents($this->localFile);
return true;
} else {
// Fetch from provider
if (isset($this->config->Content->coverimages)) {
$providers = explode(',', $this->config->Content->coverimages);
foreach ($providers as $provider) {
$provider = explode(':', trim($provider));
$func = trim($provider[0]);
$key = isset($provider[1]) ? trim($provider[1]) : null;
if ($this->{$func}($key)) {
return true;
}
}
}
}
return false;
}
