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<?php
/**
* IsisImporter: provides ISIS import methods for importing data into
* a Symfony project.
*/
class sfIsisImporter extends sfIsisImporterRelations
{
/**
* Log dispatcher.
*
* @param string $message Log message
* @param string $level Log level
*/
public function log($message, $level = 'info')
{
$this->logger->log($message, $level);
}
/**
* Constructor.
*/
public function __construct($config = null) {
$this->stats = sfIsisImporterStats::getInstance();
$this->isis = new IsisConnector($config);
// Get a logger instance.
$this->logger = sfIsisImporterLog::getInstance();
}
/**
* Get the model foreign table id.
*
* @param object $model Model
* @return string Model table id
*/
static function getModelId($model) {
return sfInflector::underscore(get_class($model)) .'_id';
}
/**
* Get the relation foreign table id.
*
* @param string $model Relation name
* @return string Relation table id
*/
static function getRelationId($relation)
{
return sfInflector::underscore($relation) .'_id';
}
/**
* Get the model and relation tablename.
*
* @param object $model Model
* @param string $model Relation name
* @return string Relation table name
*/
static function getModelRelation($model, $relation)
{
return sfInflector::camelize(self::getModelName($model)) . sfInflector::camelize($relation);
}
/**
* Get the model name.
*
* @param object $model Model
* @return string Model name
*/
static function getModelName($model)
{
return get_class($model);
}
/**
* Default implementation for parseName.
*
* @param mixed $value Name
* @return mixed Name
*/
public function parseName($value)
{
return $value;
}
/**
* Add a single entry from the database.
*
* @param string $base_model Model to use
* @param int $entry Entry number
*/
public function addEntry($base_model, $entry)
{
// Get data and setup the model.
$this->isis->read($entry);
$model = $this->newModel($base_model);
if ($model)
{
$this->log("Importing $base_model $entry...");
// Dispatch to custom import procedures.
foreach (new IsisMethodIterator($this->isis, $this) as $method => $field)
{
if (!$this->hasDeniedCombinations($base_model, $field))
{
$this->log("Calling $method for field ". $field['name'] .'.', 'debug');
$this->{$method}($model, $field);
}
}
$model->save();
$model->free(true);
}
else {
$this->log("Skipping existing entry $entry for $base_model.");
}
}
/**
* Create a new model just if doesn't exist for a given entry. For that
* to work the entry must provide and id.
*
* @param string $base_model Model to use
* @return mixed New model or false
*/
public function newModel($base_model)
{
$model = new $base_model();
$id = $this->getBaseModelId($model);
if ($id)
{
$existing = call_user_func(array($base_model, 'getById'), $id);
if (!$existing)
{
$this->setBaseModelId($model);
return $model;
}
elseif ($this->skipExisting())
{
return false;
}
else
{
return $existing;
}
}
$model->save();
return $model;
}
/**
* Check if ISIS database configuration is set to not skip existing
* entries during an import.
*
* @return boolean
*/
public function skipExisting()
{
if (isset($this->isis->format['import']['skip_existing']))
{
return $this->isis->format['import']['skip_existing'];
}
return true;
}
/**
* Set the primary key for the model by getting it or just saving it.
*
* @param object $model Base model
*/
public function setBaseModelId(&$model)
{
$model->id = $this->getBaseModelId($model);
$model->save();
}
/**
* Get the primary key for the base model.
*
* @param object $model Base model
* @return int Base model id
*/
public function getBaseModelId(&$model)
{
$method = 'get'. $this->getModelName($model) .'PrimaryKey';
if (method_exists($this, $method))
{
return $this->{$method}($model);
}
}
/**
* Check denied combinations inside a field.
*
* @param string $model Model name
* @param array $field Field data from ISIS database schema
* @return boolean True if has a denied combination, false otherwise
* @todo Wildcard support
* @todo Test
*/
public function hasDeniedCombinations($model, $field)
{
foreach ($this->isis->getDeniedCombinations($field) as $combination)
{
$has = true;
foreach ($combination as $item)
{
foreach (new IsisRowIterator($this->isis, $field) as $row)
{
if (!$this->hasDeniedItem($field, $item, $row))
{
$has = false;
break 2;
}
}
}
if ($has)
{
$denied[$row] = $combination;
}
}
if (isset($denied))
{
foreach ($denied as $row => $combination)
{
$combination = implode(',', $combination);
$this->log("Found denied combination for row $row: $combination");
}
return true;
}
return false;
}
/**
* Check if a field has a denied item.
*
* @param array $field Field data from ISIS database schema
* @param string $item Item code
* @param int $row Row number
* @return boolean True if has a denied combination, false otherwise
* @todo Wildcard
* @todo Test
*/
public function hasDeniedItem($field, $item, $row)
{
// Default condition: presence requirement for an item.
$condition = true;
// Check if item has the negation (absence) requirement for an item.
if (substr($item, 0, 1) == '!')
{
$item = substr($item, 1);
$condition = false;
}
// Check if the item exists.
$has = $this->isis->hasItem($field, $item, $row);
if ($condition == true)
{
// If the condition is true, a denied combination won't be fulfilled if
// the item is not present.
if (!$has)
{
return false;
}
}
else
{
// If the condition is false, a denied combination won't be fulfilled if
// the item is present.
if ($has)
{
return false;
}
}
return true;
}
}
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