/**
* This method associates a flowing item with certain workflow and creates
* an active 'flow' for it, unless there's already another active 'flow'
* for such combination.
*
* @param \TooBasic\Workflows\Item $item Flowing item to be injected.
* @param string $workflowName Name of the workflow to associate it with.
* @param string $error Returns an error message when something went
* wrong.
* @return boolean Returns TRUE if the items was injectected successfully.
*/
public function inject(Item $item, $workflowName, &$error = false)
{
//
// Default values.
$out = true;
//
// Logging operation.
$this->_log->log(LGGR_LOG_LEVEL_INFO, "Injecting into workflow '{$workflowName}'. Item: " . json_encode($item->toArray()));
//
// Loading and checking workflow.
$workflow = $this->getWorkflow($workflowName);
if ($workflow) {
//
// Basic query prefixes.
$prefixes = array(GC_DBQUERY_PREFIX_TABLE => $this->_dbprefix, GC_DBQUERY_PREFIX_COLUMN => 'ifl_');
//
// Creating a query to search for active flows.
$query = $this->_db->queryAdapter()->select('wkfl_item_flows', array('workflow' => $workflowName, 'type' => $item->type(), 'item' => $item->id(), 'status' => 'tmp'), $prefixes);
$stmt = $this->_db->prepare($query[GC_AFIELD_QUERY]);
//
// Checking active flows.
$injected = false;
foreach (array(WKFL_ITEM_FLOW_STATUS_OK, WKFL_ITEM_FLOW_STATUS_WAIT) as $status) {
$query[GC_AFIELD_PARAMS]['status'] = $status;
$stmt->execute($query[GC_AFIELD_PARAMS]);
if ($stmt->rowCount() > 0) {
$injected = true;
break;
}
}
//
// Checking if the new flow can be injected.
if ($injected) {
$error = 'Item already injected and running';
$out = false;
} else {
//
// Creating a query to inject a flow.
$query = $this->_db->queryAdapter()->insert('wkfl_item_flows', array('workflow' => $workflowName, 'type' => $item->type(), 'item' => $item->id()), $prefixes);
$stmt = $this->_db->prepare($query[GC_AFIELD_QUERY]);
$out = boolval($stmt->execute($query[GC_AFIELD_PARAMS]));
}
} else {
$out = false;
$error = "Unknown workflow '{$workflowName}'";
}
//
// Logging errors if any.
if (!$out) {
$this->_log->log(LGGR_LOG_LEVEL_ERROR, $error);
}
return $out;
}
/**
* This method is the one in charge of executing a step of a specific
* item, analyze results and set the next step or errors.
*
* @param \TooBasic\Workflows\ItemFlowRepresentation $flow Item flow to be
* executed.
* @param \TooBasic\Workflows\Item $item Item to be analyzed
* @return boolean Returns TRUE the current step pointed the execution of
* a next step and the flow is not in a stopping status.
* @throws \TooBasic\Workflows\WorkflowsException
*/
public function runFor(ItemFlowRepresentation $flow, Item $item)
{
//
// Default values.
$continue = true;
$logParams = array('workflow' => $flow->workflow);
//
// Loading all required settings.
$this->load();
//
// Global dependencies.
global $WKFLDefaults;
//
// Guessing the current step name.
$currentStep = $flow->step;
if (!$currentStep) {
//
// Getting the fist step from workflow when there's none.
$currentStep = $this->_config->startsAt;
$flow->step = $currentStep;
$flow->persist();
}
$this->_log->log(LGGR_LOG_LEVEL_INFO, "Current step: '{$currentStep}'", $logParams);
//
// Shortcuts.
$stepConfig = $this->_config->steps->{$currentStep};
$stepPath = Paths::Instance()->customPaths($WKFLDefaults[WKFL_DEFAULTS_PATHS][WKFL_DEFAULTS_PATH_STEPS], Names::SnakeFilename($stepConfig->manager), Paths::ExtensionPHP);
$stepClass = Names::ClassNameWithSuffix($stepConfig->manager, WKFL_CLASS_SUFFIX_STEP);
$this->_log->log(LGGR_LOG_LEVEL_DEBUG, " path: '{$stepPath}'", $logParams);
$this->_log->log(LGGR_LOG_LEVEL_DEBUG, " class: '{$stepClass}'", $logParams);
$this->_log->log(LGGR_LOG_LEVEL_DEBUG, ' config: ' . json_encode($stepConfig), $logParams);
//
// Checking if the step's class is already loaded.
if (!class_exists($stepClass)) {
//
// Checking class code file.
if (!$stepPath || !is_readable($stepPath)) {
$msg = "Unable to access class for step '{$currentStep}'.";
$this->_log->log(LGGR_LOG_LEVEL_FATAL, $msg, $logParams);
throw new WorkflowsException($msg);
}
require_once $stepPath;
}
//
// Checking class existence.
if (!class_exists($stepClass)) {
$msg = "Class '{$stepClass}' not defined.";
$this->_log->log(LGGR_LOG_LEVEL_FATAL, $msg, $logParams);
throw new WorkflowsException($msg);
}
//
// Getting a step execution class.
$step = new $stepClass($item);
//
// Sharing log pointer.
$step->setLog($this->_log);
//
// Step execution
$step->execute();
//
// Reloading item to avoid outdated data.
$item->reload();
//
// Checking that thers a connection configuration for the current
// item status.
$connection = false;
if (isset($stepConfig->connections->{$item->status()})) {
$connection = $stepConfig->connections->{$item->status()};
} else {
$this->_log->log(LGGR_LOG_LEVEL_ERROR, "Unkwnon connection for item status '{$item->status()}'.", $logParams);
$continue = false;
$flow->status = WKFL_ITEM_FLOW_STATUS_FAILED;
$flow->persist();
}
//
// Checking if there's a connection configuration to analyze.
if ($connection) {
//
// Checking what action should be taken.
if (isset($connection->step) || isset($connection->status)) {
//
// Setting the next step to take.
if (isset($connection->step)) {
$flow->step = $connection->step;
}
//
// Setting new flows status.
if (isset($connection->status)) {
$flow->status = $connection->status;
$continue = false;
}
} else {
$this->_log->log(LGGR_LOG_LEVEL_ERROR, "Neither step not status configuration for connection on status '{$item->status()}'.", $logParams);
$continue = false;
$flow->status = WKFL_ITEM_FLOW_STATUS_FAILED;
}
//
// If the flow has been set to wait, it should check if
// the waiting has conditions.
if ($flow->status == WKFL_ITEM_FLOW_STATUS_WAIT && isset($connection->wait)) {
//
// Checking configuration.
if (!isset($connection->wait->attempts) || !isset($connection->wait->status)) {
$this->_log->log(LGGR_LOG_LEVEL_ERROR, "Waiting configuration is incorrect.", $logParams);
$continue = false;
$flow->status = WKFL_ITEM_FLOW_STATUS_FAILED;
} else {
//
// Incrising the attempts count.
$flow->attempts++;
//
// Checking it already tried to many
// times.
if ($flow->attempts > $connection->wait->attempts) {
//
// Changing flow status and
// resetting counts.
$flow->status = $connection->wait->status;
$flow->attempts = 0;
$this->_log->log(LGGR_LOG_LEVEL_INFO, "Maximum attempts reached ({$connection->wait->attempts} attempts), changing flow status to '{$connection->wait->status}'.", $logParams);
} else {
$this->_log->log(LGGR_LOG_LEVEL_INFO, "Increasing attempts to {$flow->attempts}.", $logParams);
}
}
} else {
//
// The rest of the status keep the attempts to
// zero.
$flow->attempts = 0;
}
//
// Saving flow status.
$flow->persist();
$this->_log->log(LGGR_LOG_LEVEL_INFO, "Next step: '{$flow->step}'. Next flow status: '{$flow->status}'.", $logParams);
}
return $continue;
}
