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PhabricatorProjectTrigger.php
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Thu, Sep 26, 20:38

PhabricatorProjectTrigger.php
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<?php
final class PhabricatorProjectTrigger
extends PhabricatorProjectDAO
implements
PhabricatorApplicationTransactionInterface,
PhabricatorPolicyInterface,
PhabricatorIndexableInterface,
PhabricatorDestructibleInterface {
protected $name;
protected $ruleset = array();
protected $editPolicy;
private $triggerRules;
private $usage = self::ATTACHABLE;
public static function initializeNewTrigger() {
$default_edit = PhabricatorPolicies::POLICY_USER;
return id(new self())
->setName('')
->setEditPolicy($default_edit);
}
protected function getConfiguration() {
return array(
self::CONFIG_AUX_PHID => true,
self::CONFIG_SERIALIZATION => array(
'ruleset' => self::SERIALIZATION_JSON,
),
self::CONFIG_COLUMN_SCHEMA => array(
'name' => 'text255',
),
self::CONFIG_KEY_SCHEMA => array(
),
) + parent::getConfiguration();
}
public function getPHIDType() {
return PhabricatorProjectTriggerPHIDType::TYPECONST;
}
public function getDisplayName() {
$name = $this->getName();
if (strlen($name)) {
return $name;
}
return $this->getDefaultName();
}
public function getDefaultName() {
return pht('Custom Trigger');
}
public function getURI() {
return urisprintf(
'/project/trigger/%d/',
$this->getID());
}
public function getObjectName() {
return pht('Trigger %d', $this->getID());
}
public function setRuleset(array $ruleset) {
// Clear any cached trigger rules, since we're changing the ruleset
// for the trigger.
$this->triggerRules = null;
parent::setRuleset($ruleset);
}
public function getTriggerRules() {
if ($this->triggerRules === null) {
$trigger_rules = self::newTriggerRulesFromRuleSpecifications(
$this->getRuleset(),
$allow_invalid = true);
$this->triggerRules = $trigger_rules;
}
return $this->triggerRules;
}
public static function newTriggerRulesFromRuleSpecifications(
array $list,
$allow_invalid) {
// NOTE: With "$allow_invalid" set, we're trying to preserve the database
// state in the rule structure, even if it includes rule types we don't
// ha ve implementations for, or rules with invalid rule values.
// If an administrator adds or removes extensions which add rules, or
// an upgrade affects rule validity, existing rules may become invalid.
// When they do, we still want the UI to reflect the ruleset state
// accurately and "Edit" + "Save" shouldn't destroy data unless the
// user explicitly modifies the ruleset.
// In this mode, when we run into rules which are structured correctly but
// which have types we don't know about, we replace them with "Unknown
// Rules". If we know about the type of a rule but the value doesn't
// validate, we replace it with "Invalid Rules". These two rule types don't
// take any actions when a card is dropped into the column, but they show
// the user what's wrong with the ruleset and can be saved without causing
// any collateral damage.
$rule_map = PhabricatorProjectTriggerRule::getAllTriggerRules();
// If the stored rule data isn't a list of rules (or we encounter other
// fundamental structural problems, below), there isn't much we can do
// to try to represent the state.
if (!is_array($list)) {
throw new PhabricatorProjectTriggerCorruptionException(
pht(
'Trigger ruleset is corrupt: expected a list of rule '.
'specifications, found "%s".',
phutil_describe_type($list)));
}
$trigger_rules = array();
foreach ($list as $key => $rule) {
if (!is_array($rule)) {
throw new PhabricatorProjectTriggerCorruptionException(
pht(
'Trigger ruleset is corrupt: rule (with key "%s") should be a '.
'rule specification, but is actually "%s".',
$key,
phutil_describe_type($rule)));
}
try {
PhutilTypeSpec::checkMap(
$rule,
array(
'type' => 'string',
'value' => 'wild',
));
} catch (PhutilTypeCheckException $ex) {
throw new PhabricatorProjectTriggerCorruptionException(
pht(
'Trigger ruleset is corrupt: rule (with key "%s") is not a '.
'valid rule specification: %s',
$key,
$ex->getMessage()));
}
$record = id(new PhabricatorProjectTriggerRuleRecord())
->setType(idx($rule, 'type'))
->setValue(idx($rule, 'value'));
if (!isset($rule_map[$record->getType()])) {
if (!$allow_invalid) {
throw new PhabricatorProjectTriggerCorruptionException(
pht(
'Trigger ruleset is corrupt: rule type "%s" is unknown.',
$record->getType()));
}
$rule = new PhabricatorProjectTriggerUnknownRule();
} else {
$rule = clone $rule_map[$record->getType()];
}
try {
$rule->setRecord($record);
} catch (Exception $ex) {
if (!$allow_invalid) {
throw new PhabricatorProjectTriggerCorruptionException(
pht(
'Trigger ruleset is corrupt, rule (of type "%s") does not '.
'validate: %s',
$record->getType(),
$ex->getMessage()));
}
$rule = id(new PhabricatorProjectTriggerInvalidRule())
->setRecord($record)
->setException($ex);
}
$trigger_rules[] = $rule;
}
return $trigger_rules;
}
public function getDropEffects() {
$effects = array();
$rules = $this->getTriggerRules();
foreach ($rules as $rule) {
foreach ($rule->getDropEffects() as $effect) {
$effects[] = $effect;
}
}
return $effects;
}
public function newDropTransactions(
PhabricatorUser $viewer,
PhabricatorProjectColumn $column,
$object) {
$trigger_xactions = array();
foreach ($this->getTriggerRules() as $rule) {
$rule
->setViewer($viewer)
->setTrigger($this)
->setColumn($column)
->setObject($object);
$xactions = $rule->getDropTransactions(
$object,
$rule->getRecord()->getValue());
if (!is_array($xactions)) {
throw new Exception(
pht(
'Expected trigger rule (of class "%s") to return a list of '.
'transactions from "newDropTransactions()", but got "%s".',
get_class($rule),
phutil_describe_type($xactions)));
}
$expect_type = get_class($object->getApplicationTransactionTemplate());
assert_instances_of($xactions, $expect_type);
foreach ($xactions as $xaction) {
$trigger_xactions[] = $xaction;
}
}
return $trigger_xactions;
}
public function getPreviewEffect() {
$header = pht('Trigger: %s', $this->getDisplayName());
return id(new PhabricatorProjectDropEffect())
->setIcon('fa-cogs')
->setColor('blue')
->setIsHeader(true)
->setContent($header);
}
public function getSoundEffects() {
$sounds = array();
foreach ($this->getTriggerRules() as $rule) {
foreach ($rule->getSoundEffects() as $effect) {
$sounds[] = $effect;
}
}
return $sounds;
}
public function getUsage() {
return $this->assertAttached($this->usage);
}
public function attachUsage(PhabricatorProjectTriggerUsage $usage) {
$this->usage = $usage;
return $this;
}
/* -( PhabricatorApplicationTransactionInterface )------------------------- */
public function getApplicationTransactionEditor() {
return new PhabricatorProjectTriggerEditor();
}
public function getApplicationTransactionTemplate() {
return new PhabricatorProjectTriggerTransaction();
}
/* -( PhabricatorPolicyInterface )----------------------------------------- */
public function getCapabilities() {
return array(
PhabricatorPolicyCapability::CAN_VIEW,
PhabricatorPolicyCapability::CAN_EDIT,
);
}
public function getPolicy($capability) {
switch ($capability) {
case PhabricatorPolicyCapability::CAN_VIEW:
return PhabricatorPolicies::getMostOpenPolicy();
case PhabricatorPolicyCapability::CAN_EDIT:
return $this->getEditPolicy();
}
}
public function hasAutomaticCapability($capability, PhabricatorUser $viewer) {
return false;
}
/* -( PhabricatorDestructibleInterface )----------------------------------- */
public function destroyObjectPermanently(
PhabricatorDestructionEngine $engine) {
$this->openTransaction();
$conn = $this->establishConnection('w');
// Remove the reference to this trigger from any columns which use it.
queryfx(
$conn,
'UPDATE %R SET triggerPHID = null WHERE triggerPHID = %s',
new PhabricatorProjectColumn(),
$this->getPHID());
// Remove the usage index row for this trigger, if one exists.
queryfx(
$conn,
'DELETE FROM %R WHERE triggerPHID = %s',
new PhabricatorProjectTriggerUsage(),
$this->getPHID());
$this->delete();
$this->saveTransaction();
}
}

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