20160720.calendar.invitetxn.php
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	<?php

	$table = new PhabricatorCalendarEventTransaction();
	$conn_w = $table->establishConnection('w');

	echo pht(
	"Restructuring calendar invite transactions...\n");

	foreach (new LiskMigrationIterator($table) as $txn) {
	$type = PhabricatorCalendarEventInviteTransaction::TRANSACTIONTYPE;
	if ($txn->getTransactionType() != $type) {
	continue;
	}

	$old_value = array_keys($txn->getOldValue());

	$orig_new = $txn->getNewValue();
	$status_uninvited = 'uninvited';
	foreach ($orig_new as $key => $status) {
	if ($status == $status_uninvited) {
	unset($orig_new[$key]);
	}
	}
	$new_value = array_keys($orig_new);

	queryfx(
	$conn_w,
	'UPDATE %T SET '.
	'oldValue = %s, newValue = %s'.
	'WHERE id = %d',
	$table->getTableName(),
	phutil_json_encode($old_value),
	phutil_json_encode($new_value),
	$txn->getID());
	}

	echo pht('Done.')."\n";