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phab/src/applications/transactions/editfield/PhabricatorTokenizerEditField.php
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PhabricatorTokenizerEditField.php
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<?php
abstract class PhabricatorTokenizerEditField
extends PhabricatorEditField {
private $originalValue;
abstract protected function newDatasource();
protected function newControl() {
$control = id(new AphrontFormTokenizerControl())
->setDatasource($this->newDatasource());
if ($this->originalValue !== null) {
$control->setOriginalValue($this->originalValue);
}
return $control;
}
public function setValue($value) {
$this->originalValue = $value;
return parent::setValue($value);
}
protected function getValueFromSubmit(AphrontRequest $request, $key) {
// TODO: Maybe move this unusual read somewhere else so subclassing this
// correctly is easier?
$this->originalValue = $request->getArr($key.'.original');
return parent::getValueFromSubmit($request, $key);
}
protected function getValueForTransaction() {
$new = parent::getValueForTransaction();
$edge_types = array(
PhabricatorTransactions::TYPE_EDGE => true,
PhabricatorTransactions::TYPE_SUBSCRIBERS => true,
);
if (isset($edge_types[$this->getTransactionType()])) {
if ($this->originalValue !== null) {
// If we're building an edge transaction and the request has data
// about the original value the user saw when they loaded the form,
// interpret the edit as a mixture of "+" and "-" operations instead
// of a single "=" operation. This limits our exposure to race
// conditions by making most concurrent edits merge correctly.
$new = parent::getValueForTransaction();
$old = $this->originalValue;
$add = array_diff($new, $old);
$rem = array_diff($old, $new);
$value = array();
if ($add) {
$value['+'] = array_fuse($add);
}
if ($rem) {
$value['-'] = array_fuse($rem);
}
return $value;
} else {
if (!is_array($new)) {
throw new Exception(print_r($new, true));
}
return array(
'=' => array_fuse($new),
);
}
}
return $new;
}
protected function newHTTPParameterType() {
return new AphrontPHIDListHTTPParameterType();
}
}
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