/**
* Convert a frequency constant (or array thereof) to string(s).
*
* @param $frequency
* Input frequency constant.
* @return bool|string
* Appropriate string, e.g. 'month'.
* @throws Exception
* On unknown frequency.
*/
public static function frequencyToStr($frequency)
{
// Handle an array of frequencies.
if (is_array($frequency)) {
$return = array();
foreach ($frequency as $f) {
array_push($return, \NegaWattNormalizerTimeManagerBase::frequencyToStr($f));
}
return $return;
}
// Handle a single frequency.
switch ($frequency) {
case \NegaWattNormalizerTimeManagerInterface::YEAR:
return 'year';
case \NegaWattNormalizerTimeManagerInterface::MONTH:
return 'month';
case \NegaWattNormalizerTimeManagerInterface::DAY:
return 'day';
case \NegaWattNormalizerTimeManagerInterface::HOUR:
return 'hour';
case \NegaWattNormalizerTimeManagerInterface::MINUTE:
return 'minute';
default:
throw new \Exception(format_string('Frequency "@freq" not known.', array('@freq' => $frequency)));
}
}
/**
* Process raw entities in a certain time frame.
*
* Process raw-electricity entities between two given timestamps, and create
* the appropriate normalized-electricity entities.
*
* @param int $from_timestamp
* Timestamp of beginning of time frame.
* @param int $to_timestamp
* Timestamp of end of time frame.
* @param int $frequency
* Current frequency.
*
* @return array
* The processed normalized entities in the form array[timestamp][rate-type] = entity.
*/
public function processRawEntities($from_timestamp, $to_timestamp, $frequency)
{
// Output debug message.
self::debugMessage('in processRawEntities.', 2);
self::debugMessage(format_string('frequency: @frequency, time-frame: [@time_from,@time_to]', array('@frequency' => \NegaWattNormalizerTimeManagerBase::frequencyToStr($frequency))), 2, $from_timestamp, $to_timestamp);
// Create data provider.
$data_provider = $this->getDataProviderManager()->createDataProvider($from_timestamp, $to_timestamp, $frequency, $this->getMeterNode());
// Get data from raw table.
$result = $data_provider->getDataFromRawTable();
// Loop for received rate types and save the entities.
$processed_entities = array();
$prev_record = $data_provider->getRawEntityBefore();
$prev_time_delta = NULL;
$time_delta = NULL;
foreach ($result as $record) {
// Allow the sub-classed meter-normalizer to process the data
$processed_record = $this->processRawEntity($record, $prev_record);
// Test for bad meter-reading
if ($processed_record->kwh === NULL) {
$this->handleBadMeterReading($processed_record);
} else {
if ($this->hasBadMeterReadings()) {
// Update retroactively all the bad readings with the average power
// consumption at the bad-readings period.
$this->endBadMeterReadingsProcessing($processed_record);
}
}
// Add a new normalized entity.
$this->addNormalizedEntity($prev_record, $processed_record, $prev_time_delta, $time_delta, $processed_entities, $data_provider, $frequency);
// Save record and time-delta for next iteration.
$prev_record = $record;
$prev_time_delta = $time_delta;
}
// The last timestamp processed is the timestamp of last iteration.
$last_processed = $prev_record ? $prev_record->timestamp : NULL;
// Output debug message.
self::debugMessage(format_string('total entities: @count, last processed: @time_from', array('@count' => count($processed_entities))), 3, $last_processed);
return array('entities' => &$processed_entities, 'last_processed' => $last_processed);
}