+ public static function browserFromUserAgent($userAgent) {
+ $browserPatterns = array(
+ 'ipad' => '/iPad/',
+ 'iphone' => '/iPhone/', // Also cover iPod Touch
+ 'android' => '/Android/',
+ );
+
+ foreach ($browserPatterns as $browser => $pattern) {
+ if (preg_match($pattern, $userAgent)) {
+ return $browser;
+ }
+ }
+ return null;
+ }
+
+
+ // $$$ Ideally we will not rely on user agent, but for the moment we do
+ public static function paramsFromUserAgent($userAgent) {
+ // $$$ using 'embed' here for devices with assumed small screens -- really should just use CSS3 media queries
+ $browserParams = array(
+ 'ipad' => array( 'ui' => 'touch' ),
+ 'iphone' => array( 'ui' => 'embed', 'mode' => '1up' ),
+ 'android' => array( 'ui' => 'embed', 'mode' => '1up' ),
+ );
+
+ $browser = BookReader::browserFromUserAgent($userAgent);
+ if ($browser) {
+ return $browserParams[$browser];
+ }
+ return array();
+ }
+
+ public static function parsePath($path) {
+ // Parse the BookReader path and return the parts
+ // e.g. itemid/some/sub/dir/page/cover.jpg -> array( 'identifier' => 'itemid', 'subPrefix' => 'some/sub/dir',
+ // 'operator' => 'page', 'filename' => 'cover.jpg')
+
+ $parts = array();
+
+ // Pull off query, e.g. ?foo=bar
+ if (preg_match('#(.*?)(\?.*)#', $path, $matches) === 1) {
+ $parts['query'] = $matches[2];
+ $path = $matches[1];
+ }
+
+ // Pull off identifier
+ if (preg_match('#[^/&?]+#', $path, $matches) === 0) {
+ // no match
+ return $parts;
+ }
+ $parts['identifier'] = $matches[0];
+ $path = substr($path, strlen($matches[0]));
+
+ // Look for operators
+ // The sub-prefix can be arbitrary, so we match up until the first operator
+ $operators = '(' . join('|', self::$downloadOperators) . ')';
+ $pattern = '#(?P<subPrefix>.*?)/(?P<operator>' . $operators . ')/(?P<operand>.*)#';
+ if (preg_match($pattern, $path, $matches) === 1) {
+ $parts['subPrefix'] = substr($matches['subPrefix'], 1); // remove leading '/'
+ $parts['operator'] = $matches['operator'];
+ $parts['operand'] = $matches['operand'];
+ } else {
+ $parts['subPrefix'] = $path;
+ }
+
+ return $parts;
+ }
+