function serveLookupRequest($requestEnv)
{
$brm = new BookReaderMeta();
try {
$metadata = $brm->buildMetadata($_REQUEST['id'], $_REQUEST['itemPath'], $_REQUEST['subPrefix'], $_REQUEST['server']);
} catch (Exception $e) {
$this->BRfatal($e->getMessage());
}
$page = $_REQUEST['page'];
// Index of image to return
$imageIndex = null;
// deal with subPrefix
if (array_key_exists($_REQUEST, 'subPrefix') && $_REQUEST['subPrefix']) {
$parts = explode('/', $_REQUEST['subPrefix']);
$bookId = $parts[count($parts) - 1];
} else {
$bookId = $_REQUEST['id'];
}
$pageInfo = $this->parsePageRequest($page, $bookId);
$basePage = $pageInfo['type'];
$leaf = null;
$region = null;
switch ($basePage) {
case 'title':
if (!array_key_exists('titleIndex', $metadata)) {
$this->BRfatal("No title page asserted in book");
}
$imageIndex = $metadata['titleIndex'];
break;
/* Old 'cover' behaviour where it would show cover 0 if it exists or return 404. */
/* Old 'cover' behaviour where it would show cover 0 if it exists or return 404. */
case 'cover0':
if (!array_key_exists('coverIndices', $metadata)) {
$this->BRfatal("No cover asserted in book");
}
$imageIndex = $metadata['coverIndices'][0];
// $$$ TODO add support for other covers
break;
case 'preview':
case 'cover':
// Show our best guess if cover is requested
// Preference is:
// Cover page if book was published >= 1923
// Title page
// Cover page
// Page 0
if (array_key_exists('date', $metadata) && array_key_exists('coverIndices', $metadata)) {
if ($brm->parseYear($metadata['date']) >= 1923) {
$imageIndex = $metadata['coverIndices'][0];
break;
}
}
if (array_key_exists('titleIndex', $metadata)) {
$imageIndex = $metadata['titleIndex'];
break;
}
if (array_key_exists('coverIndices', $metadata)) {
$imageIndex = $metadata['coverIndices'][0];
break;
}
// First page
$imageIndex = 0;
break;
case 'n':
// Accessible index page
$imageIndex = intval($pageInfo['value']);
break;
case 'page':
// Named page
$index = array_search($pageInfo['value'], $metadata['pageNums']);
if ($index === FALSE) {
// Not found
$this->BRfatal("Page not found");
break;
}
$imageIndex = $index;
break;
case 'leaf':
// Leaf explicitly specified
$leaf = $pageInfo['value'];
break;
default:
// Shouldn't be possible
$this->BRfatal("Unrecognized page type requested");
break;
}
if (is_null($leaf)) {
// Leaf was not explicitly set -- look it up
$leaf = $brm->leafForIndex($imageIndex, $metadata['leafNums']);
}
$requestEnv = array('zip' => $metadata['zip'], 'file' => $brm->imageFilePath($leaf, $metadata['subPrefix'], $metadata['imageFormat']), 'ext' => 'jpg');
// remove non-passthrough keys from pageInfo
unset($pageInfo['type']);
unset($pageInfo['value']);
// add pageinfo to request
$requestEnv = array_merge($pageInfo, $requestEnv);
// Return image data - will check privs
$this->serveRequest($requestEnv);
}
