/**
* {@inheritdoc}
*/
protected function setUp()
{
parent::setUp();
// Create a mock migration. This will be injected into the source plugin
// under test.
$this->migration = $this->prophesize(MigrationInterface::class);
$this->migration->id()->willReturn($this->randomMachineName(16));
// Prophesize a useless ID map plugin and an empty set of destination IDs.
// Calling code can override these prophecies later and set up different
// behaviors.
$this->migration->getIdMap()->willReturn($this->prophesize(MigrateIdMapInterface::class)->reveal());
$this->migration->getDestinationIds()->willReturn([]);
}
/**
* {@inheritdoc}
*
* The migration iterates over rows returned by the source plugin. This
* method determines the next row which will be processed and imported into
* the system.
*
* The method tracks the source and destination IDs using the ID map plugin.
*
* This also takes care about highwater support. Highwater allows to reimport
* rows from a previous migration run, which got changed in the meantime.
* This is done by specifying a highwater field, which is compared with the
* last time, the migration got executed (originalHighWater).
*/
public function next()
{
$this->currentSourceIds = NULL;
$this->currentRow = NULL;
// In order to find the next row we want to process, we ask the source
// plugin for the next possible row.
while (!isset($this->currentRow) && $this->getIterator()->valid()) {
$row_data = $this->getIterator()->current() + $this->configuration;
$this->getIterator()->next();
$row = new Row($row_data, $this->migration->getSourcePlugin()->getIds(), $this->migration->getDestinationIds());
// Populate the source key for this row.
$this->currentSourceIds = $row->getSourceIdValues();
// Pick up the existing map row, if any, unless getNextRow() did it.
if (!$this->mapRowAdded && ($id_map = $this->idMap->getRowBySource($this->currentSourceIds))) {
$row->setIdMap($id_map);
}
// Clear any previous messages for this row before potentially adding
// new ones.
if (!empty($this->currentSourceIds)) {
$this->idMap->delete($this->currentSourceIds, TRUE);
}
// Preparing the row gives source plugins the chance to skip.
if ($this->prepareRow($row) === FALSE) {
continue;
}
// Check whether the row needs processing.
// 1. This row has not been imported yet.
// 2. Explicitly set to update.
// 3. The row is newer than the current highwater mark.
// 4. If no such property exists then try by checking the hash of the row.
if (!$row->getIdMap() || $row->needsUpdate() || $this->aboveHighwater($row) || $this->rowChanged($row)) {
$this->currentRow = $row->freezeSource();
}
}
}
