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Rearrange equal items for non-homogeneous arrays, fixes #33
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| <?php | ||
|
|
||
| namespace Swaggest\JsonDiff; | ||
|
|
||
| class JsonHash | ||
| { | ||
| private $options = 0; | ||
|
|
||
| public function __construct($options = 0) | ||
| { | ||
| $this->options = $options; | ||
| } | ||
|
|
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| /** | ||
| * @param mixed $data | ||
| * @param string $path | ||
| * @return string | ||
| */ | ||
| public function xorHash($data, $path = '') | ||
| { | ||
| $xorHash = ''; | ||
|
|
||
| if (!$data instanceof \stdClass && !is_array($data)) { | ||
| $s = $path . (string)$data; | ||
| if (strlen($xorHash) < strlen($s)) { | ||
| $xorHash = str_pad($xorHash, strlen($s)); | ||
| } | ||
| $xorHash ^= $s; | ||
|
|
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| return $xorHash; | ||
| } | ||
|
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| if ($this->options & JsonDiff::TOLERATE_ASSOCIATIVE_ARRAYS) { | ||
| if (is_array($data) && !empty($data) && !array_key_exists(0, $data)) { | ||
| $data = (object)$data; | ||
| } | ||
| } | ||
|
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| if (is_array($data)) { | ||
| if ($this->options & JsonDiff::REARRANGE_ARRAYS) { | ||
| foreach ($data as $key => $item) { | ||
| $itemPath = $path . '/' . $key; | ||
| $itemHash = $path . $this->xorHash($item, $itemPath); | ||
| if (strlen($xorHash) < strlen($itemHash)) { | ||
| $xorHash = str_pad($xorHash, strlen($itemHash)); | ||
| } | ||
| $xorHash ^= $itemHash; | ||
| } | ||
| } else { | ||
| foreach ($data as $key => $item) { | ||
| $itemPath = $path . '/' . $key; | ||
| $itemHash = md5($itemPath . $this->xorHash($item, $itemPath), true); | ||
| if (strlen($xorHash) < strlen($itemHash)) { | ||
| $xorHash = str_pad($xorHash, strlen($itemHash)); | ||
| } | ||
| $xorHash ^= $itemHash; | ||
| } | ||
| } | ||
|
|
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| return $xorHash; | ||
| } | ||
|
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| $dataKeys = get_object_vars($data); | ||
| foreach ($dataKeys as $key => $value) { | ||
| $propertyPath = $path . '/' . | ||
| JsonPointer::escapeSegment($key, (bool)($this->options & JsonDiff::JSON_URI_FRAGMENT_ID)); | ||
| $propertyHash = $propertyPath . $this->xorHash($value, $propertyPath); | ||
| if (strlen($xorHash) < strlen($propertyHash)) { | ||
| $xorHash = str_pad($xorHash, strlen($propertyHash)); | ||
| } | ||
| $xorHash ^= $propertyHash; | ||
| } | ||
|
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| return $xorHash; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,38 @@ | ||
| <?php | ||
|
|
||
| namespace Swaggest\JsonDiff\Tests; | ||
|
|
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| use Swaggest\JsonDiff\JsonDiff; | ||
| use Swaggest\JsonDiff\JsonHash; | ||
|
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| class JsonHashTest extends \PHPUnit_Framework_TestCase | ||
| { | ||
| public function testHash() | ||
| { | ||
| $h1 = (new JsonHash())->xorHash(json_decode('{"data": [{"A": 1},{"B": 2}]}')); | ||
| $h2 = (new JsonHash())->xorHash(json_decode('{"data": [{"B": 2},{"A": 1}]}')); | ||
| $h3 = (new JsonHash())->xorHash(json_decode('{"data": [{"B": 3},{"A": 2}]}')); | ||
|
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| $this->assertNotEmpty($h1); | ||
| $this->assertNotEmpty($h2); | ||
| $this->assertNotEmpty($h3); | ||
| $this->assertNotEquals($h1, $h2); | ||
| $this->assertNotEquals($h1, $h3); | ||
| } | ||
|
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| public function testHashRearrange() | ||
| { | ||
| $h1 = (new JsonHash(JsonDiff::REARRANGE_ARRAYS)) | ||
| ->xorHash(json_decode('{"data": [{"A": 1},{"B": 2}]}')); | ||
| $h2 = (new JsonHash(JsonDiff::REARRANGE_ARRAYS)) | ||
| ->xorHash(json_decode('{"data": [{"B": 2},{"A": 1}]}')); | ||
| $h3 = (new JsonHash(JsonDiff::REARRANGE_ARRAYS)) | ||
| ->xorHash(json_decode('{"data": [{"B": 3},{"A": 2}]}')); | ||
|
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| $this->assertNotEmpty($h1); | ||
| $this->assertNotEmpty($h2); | ||
| $this->assertNotEmpty($h3); | ||
| $this->assertEquals($h1, $h2); | ||
| $this->assertNotEquals($h1, $h3); | ||
| } | ||
| } |
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