diff options
Diffstat (limited to 'lib/phptal/PHPTAL/RepeatControllerGroups.php')
| -rw-r--r-- | lib/phptal/PHPTAL/RepeatControllerGroups.php | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/lib/phptal/PHPTAL/RepeatControllerGroups.php b/lib/phptal/PHPTAL/RepeatControllerGroups.php new file mode 100644 index 0000000..e6690ba --- /dev/null +++ b/lib/phptal/PHPTAL/RepeatControllerGroups.php @@ -0,0 +1,199 @@ +<?php +/** + * PHPTAL templating engine + * + * PHP Version 5 + * + * @category HTML + * @package PHPTAL + * @author Laurent Bedubourg <lbedubourg@motion-twin.com> + * @author Kornel Lesiński <kornel@aardvarkmedia.co.uk> + * @author Iván Montes <drslump@pollinimini.net> + * @license http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License + * @version SVN: $Id$ + * @link http://phptal.org/ + */ + +/** + * Keeps track of variable contents when using grouping in a path (first/ and last/) + * + * @package PHPTAL + * @subpackage Php + */ +class PHPTAL_RepeatControllerGroups +{ + protected $dict = array(); + protected $cache = array(); + protected $data = null; + protected $vars = array(); + protected $branch; + + + public function __construct() + { + $this->dict = array(); + $this->reset(); + } + + /** + * Resets the result caches. Use it to signal an iteration in the loop + * + */ + public function reset() + { + $this->cache = array(); + } + + /** + * Checks if the data passed is the first one in a group + * + * @param mixed $data The data to evaluate + * + * @return Mixed True if the first item in the group, false if not and + * this same object if the path is not finished + */ + public function first($data) + { + if ( !is_array($data) && !is_object($data) && !is_null($data) ) { + + if ( !isset($this->cache['F']) ) { + + $hash = md5($data); + + if ( !isset($this->dict['F']) || $this->dict['F'] !== $hash ) { + $this->dict['F'] = $hash; + $res = true; + } else { + $res = false; + } + + $this->cache['F'] = $res; + } + + return $this->cache['F']; + } + + $this->data = $data; + $this->branch = 'F'; + $this->vars = array(); + return $this; + } + + /** + * Checks if the data passed is the last one in a group + * + * @param mixed $data The data to evaluate + * + * @return Mixed True if the last item in the group, false if not and + * this same object if the path is not finished + */ + public function last($data) + { + if ( !is_array($data) && !is_object($data) && !is_null($data) ) { + + if ( !isset($this->cache['L']) ) { + + $hash = md5($data); + + if (empty($this->dict['L'])) { + $this->dict['L'] = $hash; + $res = false; + } elseif ($this->dict['L'] !== $hash) { + $this->dict['L'] = $hash; + $res = true; + } else { + $res = false; + } + + $this->cache['L'] = $res; + } + + return $this->cache['L']; + } + + $this->data = $data; + $this->branch = 'L'; + $this->vars = array(); + return $this; + } + + /** + * Handles variable accesses for the tal path resolver + * + * @param string $var The variable name to check + * + * @return Mixed An object/array if the path is not over or a boolean + * + * @todo replace the PHPTAL_Context::path() with custom code + */ + public function __get($var) + { + // When the iterator item is empty we just let the tal + // expression consume by continuously returning this + // same object which should evaluate to true for 'last' + if ( is_null($this->data) ) { + return $this; + } + + // Find the requested variable + $value = PHPTAL_Context::path($this->data, $var, true); + + // Check if it's an object or an array + if ( is_array($value) || is_object($value) ) { + // Move the context to the requested variable and return + $this->data = $value; + $this->addVarName($var); + return $this; + } + + // get a hash of the variable contents + $hash = md5($value); + + // compute a path for the variable to use as dictionary key + $path = $this->branch . $this->getVarPath() . $var; + + // If we don't know about this var store in the dictionary + if ( !isset($this->cache[$path]) ) { + + if ( !isset($this->dict[$path]) ) { + $this->dict[$path] = $hash; + $res = $this->branch === 'F'; + } else { + // Check if the value has changed + if ($this->dict[$path] !== $hash) { + $this->dict[$path] = $hash; + $res = true; + } else { + $res = false; + } + } + + $this->cache[$path] = $res; + } + + return $this->cache[$path]; + + } + + /** + * Adds a variable name to the current path of variables + * + * @param string $varname The variable name to store as a path part + * @access protected + */ + protected function addVarName($varname) + { + $this->vars[] = $varname; + } + + /** + * Returns the current variable path separated by a slash + * + * @return String The current variable path + * @access protected + */ + protected function getVarPath() + { + return implode('/', $this->vars) . '/'; + } +} |