function __construct()
{
parent::__construct();
$this->setReversible(true);
}
/**
* Returns the value determined by the binding.
*
* @return mixed The value to use as determined by resolving the binding.
* @throws Exception under various circumstances if the value cannot be determined.
*/
final function valueForBinding($prop, $binding)
{
$exposedBindings = $this->exposedBindings();
// Get a list of all options, coalesced with default value from the binding setup for this property.
// the lack of documenting (ie exposing) a binding setup should simply assume that there are no options.
// @todo can this block be relplaced with $binding->coalescedOptions()?
$optionDefaults = array();
$optionDefaults = $binding->bindingSetup()->options();
$coalescedOptions = array_merge($optionDefaults, $binding->options());
try {
// get original value
if (strpos($binding->bindToKeyPath(), '::') === false) {
$boundValue = $binding->bindToObject()->valueForKeyPath($binding->bindToKeyPath());
} else {
$boundValue = $binding->bindToObject()->valueForStaticKeyPath($binding->bindToKeyPath());
}
} catch (WFUndefinedKeyException $e) {
if ($binding->raisesForNotApplicableKeys()) {
throw $e;
}
$func = WFFunction::create('return "undefined key: {$binding->bindToKeyPath()}, substituting " . WFPrettyPrint($binding->notApplicablePlaceholder());')->withArguments('binding')->curry($binding);
WFLog::log($func, WFLog::TRACE_LOG);
$boundValue = $binding->notApplicablePlaceholder();
}
// let class apply options to value
$this->processBindingOptions($prop, $coalescedOptions, $boundValue);
// process value transformer
if ($binding->valueTransformerName()) {
$func = WFFunction::create('return "Transforming value " . WFPrettyPrint($boundValue) . " with " . $binding->valueTransformerName();')->withArguments('boundValue', 'binding')->curry($boundValue, $binding);
WFLog::log($func, WFLog::TRACE_LOG);
$vt = WFValueTransformer::valueTransformerForName($binding->valueTransformerName());
$boundValue = $vt->transformedValue($boundValue);
$func = WFFunction::create('return "Transformed value: " . WFPrettyPrint($boundValue);')->withArguments('boundValue')->curry($boundValue);
WFLog::log($func, WFLog::TRACE_LOG);
}
if ($binding->formatter()) {
$func = WFFunction::create('return "Formatting value " . WFPrettyPrint($boundValue) . " with " . $binding->formatter();')->withArguments('boundValue', 'binding')->curry($boundValue, $binding);
WFLog::log($func, WFLog::TRACE_LOG);
$formatter = $this->page()->module()->valueForKey($binding->formatter());
// automatically handle formatting of arrays of objects
if (is_array($boundValue)) {
// using foreach since for some f'd up reason array_walk($boundValue, array($formatter,"stringForValue")) didn't munge the values.
foreach (array_keys($boundValue) as $k) {
$boundValue[$k] = $formatter->stringForValue($boundValue[$k]);
}
} else {
$boundValue = $formatter->stringForValue($boundValue);
}
$func = WFFunction::create('return "Formatted value: " . WFPrettyPrint($boundValue);')->withArguments('boundValue')->curry($boundValue);
WFLog::log($func, WFLog::TRACE_LOG);
}
$func = WFFunction::create('return "Using value " . WFPrettyPrint($boundValue) . " for binding " . $prop;')->withArguments('boundValue', 'prop')->curry($boundValue, $prop);
WFLog::log($func, WFLog::TRACE_LOG);
return $boundValue;
}