/**
* @see Patcher::patch
*
* Applies the provided diff to the provided array and returns the result.
* The provided diff needs to be non-associative. In other words, calling
* isAssociative on it should return false.
*
* Note that remove operations can introduce gaps into the input array $base.
* For instance, when the input is [ 0 => 'a', 1 => 'b', 2 => 'c' ], and there
* is one remove operation for 'b', the result will be [ 0 => 'a', 2 => 'c' ].
*
* @since 0.4
*
* @param array $base
* @param Diff $diff
*
* @return array
* @throws PatcherException
*/
public function patch(array $base, Diff $diff)
{
if ($diff->looksAssociative()) {
$this->handleError('ListPatcher can only patch using non-associative diffs');
}
foreach ($diff as $diffOp) {
if ($diffOp instanceof DiffOpAdd) {
$base[] = $diffOp->getNewValue();
} elseif ($diffOp instanceof DiffOpRemove) {
$key = array_search($diffOp->getOldValue(), $base, true);
if ($key === false) {
$this->handleError('Cannot remove an element from a list if it is not present');
continue;
}
unset($base[$key]);
}
}
return $base;
}
/**
* @dataProvider looksAssociativeProvider
*/
public function testLooksAssociative(Diff $diff, $looksAssoc)
{
$this->assertEquals($looksAssoc, $diff->looksAssociative());
if (!$diff->looksAssociative()) {
$this->assertFalse($diff->hasAssociativeOperations());
}
}
private function patchMapOrList(array $base, Diff $diff)
{
if ($diff->looksAssociative()) {
$base = $this->patch($base, $diff);
} else {
$base = $this->listPatcher->patch($base, $diff);
}
return $base;
}
