20130728.ponderunique.php
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20130728.ponderunique.php
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	<?php

	$map = array();

	echo pht('Merging duplicate answers by authors...')."\n";

	$atable = new PonderAnswer();
	$conn_w = $atable->establishConnection('w');
	$conn_w->openTransaction();

	$answers = new LiskMigrationIterator(new PonderAnswer());
	foreach ($answers as $answer) {
	$aid = $answer->getID();
	$qid = $answer->getQuestionID();
	$author_phid = $answer->getAuthorPHID();

	echo pht('Processing answer ID #%d...', $aid)."\n";

	if (empty($map[$qid][$author_phid])) {
	echo pht('Answer is unique.')."\n";
	$map[$qid][$author_phid] = $answer;
	continue;
	} else {
	echo pht('Merging answer.')."\n";
	$target = $map[$qid][$author_phid];
	queryfx(
	$conn_w,
	'UPDATE %T SET content = %s WHERE id = %d',
	$target->getTableName(),

	$target->getContent().
	"\n\n".
	"---".
	"\n\n".
	"> (This content was automatically merged from another answer by the ".
	"same author.)".
	"\n\n".
	$answer->getContent(),

	$target->getID());

	queryfx(
	$conn_w,
	'DELETE FROM %T WHERE id = %d',
	$target->getTableName(),
	$answer->getID());

	queryfx(
	$conn_w,
	'UPDATE %T SET targetPHID = %s WHERE targetPHID = %s',
	'ponder_comment',
	$target->getPHID(),
	$answer->getPHID());
	}
	}

	$conn_w->saveTransaction();
	echo pht('Done.')."\n";