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cvsjoko |
1.1 |
<? |
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// ------------------------------------------------------------------------------------------------ |
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class TrackingState { |
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// some vars for storing some arguments |
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var $args_input; |
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var $args_main; |
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// some vars holding metadata about the arguments |
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var $metadata_arguments; |
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var $meta_names_list; |
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var $meta_input2main_map; |
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var $meta_main2output_map; |
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var $meta_persistent_lookup; |
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// metadata about callbacks |
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var $metadata_callbacks; |
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var $ic_store; |
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// ------------------------------------------------------------------------------------------------ |
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function TrackingState($metadata_arguments, $metadata_callbacks = array()) { |
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$this->args_input = array(); |
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$this->args_main = array(); |
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// this will initialize "TrackingState" with all common arguments used by the application |
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// create proper arrays for input- and output- arguments and build lookup-hash for each argument being persistent |
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$this->metadata_arguments = $metadata_arguments; |
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$this->metadata_callbacks = $metadata_callbacks; |
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$this->meta_names_list = array(); |
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reset($this->metadata_arguments); |
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while ( $entry = current($this->metadata_arguments) ) { |
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$name_short = $entry['name_short']; |
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$name_long = $entry['name_long']; |
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$flags = $entry['flags']; |
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array_push($this->meta_names_list, $name_long); |
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if (stristr($flags, 'i')) { |
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$this->meta_input2main_map[$name_short] = $name_long; |
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} |
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if (stristr($flags, 'o')) { |
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$this->meta_main2output_map[$name_long] = $name_short; |
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} |
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if (stristr($flags, 'p')) { |
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$this->meta_persistent_lookup[$name_long] = 1; |
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} else { |
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$this->meta_persistent_lookup[$name_long] = 0; |
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} |
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next($this->metadata_arguments); |
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} |
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// initialize information clusters from "Site" |
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global $site; |
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($this->ic_store = $site->getInformationCluster('tracking_store')) || trigger_error("could not load InformationCluster", E_USER_ERROR); |
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// load persistent state |
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$this->_persistency_load(); |
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} |
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// ----------------------------------------------------------- |
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function _getVarname($name) { |
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// if we know the variable, ... |
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if (in_array($name, $this->meta_names_list)) { |
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// ... we try to get it from namespace "main", ... |
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$varname = '$this->args_main[\'main\']' . NameSpaceVarname2PhpVarnameHashPart($name); |
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} else { |
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// ... else we assume the main namespace (root) |
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$varname = '$this->args_main' . NameSpaceVarname2PhpVarnameHashPart($name); |
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} |
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// return varname |
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return $varname; |
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} |
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// ----------------------------------------------------------- |
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function getAll() { |
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return $this->args_main; |
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} |
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// ----------------------------------------------------------- |
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function get($name) { |
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$retval = ""; |
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$varname = $this->_getVarname($name); |
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$evstring = "if (isset($varname)) { return $varname; }"; |
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$retval = eval($evstring); |
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return $retval; |
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} |
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// ----------------------------------------------------------- |
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function set($name, $value) { |
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$varname = $this->_getVarname($name); |
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$evstring = $varname . ' = $value;'; |
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$retval = eval($evstring); |
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$this->_persistency_save(); |
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} |
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// ----------------------------------------------------------- |
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function unsetVar($name) { |
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$varname = $this->_getVarname($name); |
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$evstring = "if (isset($varname)) { unset($varname); }"; |
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$retval = eval($evstring); |
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$this->_persistency_save(); |
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} |
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// ----------------------------------------------------------- |
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function clear() { |
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$this->args_main = array(); |
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$this->_persistency_save(); |
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} |
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// ------------------------------------------------------------------------------------------------ |
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// collect all input-arguments "coming in" via GETs, POSTs or maybe other origins |
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function collectInputArguments() { |
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// merge together values from GET- or POST-requests |
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global $HTTP_GET_VARS, $HTTP_POST_VARS; |
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$request_data_arr = array_merge($HTTP_GET_VARS, $HTTP_POST_VARS); |
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// TODO: |
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// - kill all invalid arguments |
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// - prevent hacker-attacks(!), (e.g. POST-floods) |
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// do our work |
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$this->_storeInputArguments($request_data_arr); |
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$this->_processInputArguments(); |
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$this->_processCallbackDomains(); |
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$this->_persistency_save(); |
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} |
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// ------------------------------------------------------------------------------------------------ |
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// store input-arguments |
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function _storeInputArguments($args) { |
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$this->args_input = $args; |
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} |
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// ------------------------------------------------------------------------------------------------ |
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// translate valid input-arguments to main-arguments |
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function _processInputArguments() { |
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reset($this->meta_input2main_map); |
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while( list($name_short, $name_long) = each($this->meta_input2main_map) ) { |
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if (isset($this->args_input[$name_short])) { |
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// write value to "main"-namespace of "args_main" |
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$this->args_main['main'][$name_long] = $this->args_input[$name_short]; |
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} |
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} |
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} |
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// ------------------------------------------------------------------------------------------------ |
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// process all registered callback-domains |
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function _processCallbackDomains() { |
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while (list($name_callbackdomain, $callback_list) = each($this->metadata_callbacks)) { |
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// check if "$name_callbackdomain" exists as namespace |
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$namespace = $name_callbackdomain; |
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if (isset($this->args_main[$namespace])) { |
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$this->_processCallbackList($namespace, $callback_list); |
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} |
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} |
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} |
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// ------------------------------------------------------------------------------------------------ |
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// process a specified callback-domain |
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function _processCallbackList($namespace, $callback_list = array()) { |
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while (list($name_callback, $callback) = each($callback_list)) { |
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// check if "$name_callback" exists as entry in given namespace |
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$name_entry = $name_callback; |
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if (isset($this->args_main[$namespace][$name_entry])) { |
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$callbackdata = $this->args_main[$namespace][$name_entry]; |
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$this->_processCallback($callback, $callbackdata); |
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} |
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} |
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} |
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// ------------------------------------------------------------------------------------------------ |
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// process a callback |
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function _processCallback($callback = array(), $data) { |
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$func_name = ''; |
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isset($callback['func_name']) && ($func_name = $callback['func_name']); |
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if ($func_name) { |
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call_user_func($func_name, $data); |
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} |
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} |
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// ------------------------------------------------------------------------------------------------ |
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// return valid output-arguments from main-arguments and state |
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function getOutputArguments($args_additional) { |
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// TODO: merge! |
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// TODO: implement handling for "session not available - use querystring for state" here |
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// get all arguments from "main"-namespace of "args_main" |
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//$args_process = $this->args_main['main']; |
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$args_process = array(); |
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// merge these args with additional-args |
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while( list($key, $value) = each($args_additional) ) { |
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$args_process[$key] = $value; |
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} |
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// filter args just valid for output |
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$retval = array(); |
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reset($this->meta_main2output_map); |
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while( list($name_long, $name_short) = each($this->meta_main2output_map) ) { |
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if (isset($args_process[$name_long])) { |
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//$retval[$this->meta_main2output_map[$key]] = $value; |
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$retval[$name_short] = $args_process[$name_long]; |
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} |
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} |
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return $retval; |
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} |
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// ------------------------------------------------------------------------------------------------ |
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function _createOutputArguments() { |
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} |
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// ------------------------------------------------------------------------------------------------ |
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function _persistency_load() { |
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// TODO: merge! |
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$this->args_main = $this->ic_store->load(); |
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if (!$this->args_main) { $this->args_main = array(); } |
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} |
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// ------------------------------------------------------------------------------------------------ |
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function _persistency_save() { |
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// get "$this->args_main", ... |
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$args_persistent = $this->args_main; |
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// ... remove all elements from "main"-namespace which have the persistency-flag cleared/not set ... |
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if (isset($args_persistent['main'])) { |
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while(list($name_long, $value) = each($args_persistent['main'])) { |
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//print "name_long: " . $name_long . "<br>"; |
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if ( (isset($this->meta_persistent_lookup[$name_long])) && !($this->meta_persistent_lookup[$name_long]) ) { |
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//print "unset(args_persistent['main'][$name_long])<br>"; |
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unset($args_persistent['main'][$name_long]); |
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} |
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} |
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} |
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// ... and save the rest |
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$this->ic_store->save($args_persistent); |
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} |
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// ------------------------------------------------------------------------------------------------ |
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function dump() { |
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print $this->dump_get(); |
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} |
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function dump_get() { |
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return dumpVar_get($this->args_main, 'content of "$tracking->state->args_main"', 'html'); |
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} |
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} |
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?> |
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