JsonDiff::getModifiedOriginal() - Code Metrics - Inspection of "Add JSON Merge Patch support #13" - swaggest/json-diff - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#15)

unknown

created 2018-09-20 14:39 UTC

JsonDiff::getModifiedOriginal() A

↳ Parent: JsonDiff

Complexity

Conditions	1
Paths	1

Size

Total Lines	3
Code Lines	1

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	2
CRAP Score	1

Importance

Changes

Metric	Value
dl	0
loc	3
ccs	2
cts	2
cp	1
rs	10
c	0
b	0
f	0
cc	1
eloc	1
nc	1
nop	0
crap	1

<?php

namespace Swaggest\JsonDiff;

use Swaggest\JsonDiff\JsonPatch\Add;
use Swaggest\JsonDiff\JsonPatch\Remove;
use Swaggest\JsonDiff\JsonPatch\Replace;
use Swaggest\JsonDiff\JsonPatch\Test;

class JsonDiff
{
    /**
     * REARRANGE_ARRAYS is an option to enable arrays rearrangement to minimize the difference.
     */
    const REARRANGE_ARRAYS = 1;

    /**
     * STOP_ON_DIFF is an option to improve performance by stopping comparison when a difference is found.
     */
    const STOP_ON_DIFF = 2;

    /**
     * JSON_URI_FRAGMENT_ID is an option to use URI Fragment Identifier Representation (example: "#/c%25d").
     * If not set default JSON String Representation (example: "/c%d").
     */
    const JSON_URI_FRAGMENT_ID = 4;

    /**
     * SKIP_JSON_PATCH is an option to improve performance by not building JsonPatch for this diff.
     */
    const SKIP_JSON_PATCH = 8;

    /**
     * SKIP_JSON_MERGE_PATCH is an option to improve performance by not building JSON Merge Patch value for this diff.
     */
    const SKIP_JSON_MERGE_PATCH = 16;

    private $options = 0;
    private $original;
    private $new;

    /**
     * @var mixed Merge patch container
     */
    private $merge;

    private $added;
    private $addedCnt = 0;
    private $addedPaths = array();

    private $removed;
    private $removedCnt = 0;
    private $removedPaths = array();

    private $modifiedOriginal;
    private $modifiedNew;
    private $modifiedCnt = 0;
    private $modifiedPaths = array();

    private $path = '';
    private $pathItems = array();

    private $rearranged;

    /** @var JsonPatch */
    private $jsonPatch;

    /**
     * @param mixed $original
     * @param mixed $new
     * @param int $options
     * @throws Exception
     */
    public function __construct($original, $new, $options = 0)
    {
        if (!($options & self::SKIP_JSON_PATCH)) {
            $this->jsonPatch = new JsonPatch();
        }

        $this->original = $original;
        $this->new = $new;
        $this->options = $options;

        if ($options & self::JSON_URI_FRAGMENT_ID) {
            $this->path = '#';
        }

        $this->rearranged = $this->rearrange();
        if (($new !== null) && $this->merge === null) {
            $this->merge = new \stdClass();
        }
    }

    /**
     * Returns total number of differences
     * @return int
     */
    public function getDiffCnt()
    {
        return $this->addedCnt + $this->modifiedCnt + $this->removedCnt;
    }

    /**
     * Returns removals as partial value of original.
     * @return mixed
     */
    public function getRemoved()
    {
        return $this->removed;
    }

    /**
     * Returns list of `JSON` paths that were removed from original.
     * @return array
     */
    public function getRemovedPaths()
    {
        return $this->removedPaths;
    }

    /**
     * Returns number of removals.
     * @return int
     */
    public function getRemovedCnt()
    {
        return $this->removedCnt;
    }

    /**
     * Returns additions as partial value of new.
     * @return mixed
     */
    public function getAdded()
    {
        return $this->added;
    }

    /**
     * Returns number of additions.
     * @return int
     */
    public function getAddedCnt()
    {
        return $this->addedCnt;
    }

    /**
     * Returns list of `JSON` paths that were added to new.
     * @return array
     */
    public function getAddedPaths()
    {
        return $this->addedPaths;
    }

    /**
     * Returns changes as partial value of original.
     * @return mixed
     */
    public function getModifiedOriginal()
    {
        return $this->modifiedOriginal;
    }

    /**
     * Returns changes as partial value of new.
     * @return mixed
     */
    public function getModifiedNew()
    {
        return $this->modifiedNew;
    }

    /**
     * Returns number of changes.
     * @return int
     */
    public function getModifiedCnt()
    {
        return $this->modifiedCnt;
    }

    /**
     * Returns list of `JSON` paths that were changed from original to new.
     * @return array
     */
    public function getModifiedPaths()
    {
        return $this->modifiedPaths;
    }

    /**
     * Returns new value, rearranged with original order.
     * @return array|object
     */
    public function getRearranged()
    {
        return $this->rearranged;
    }

    /**
     * Returns JsonPatch of difference
     * @return JsonPatch
     */
    public function getPatch()
    {
        return $this->jsonPatch;
    }

    /**
     * Returns JSON Merge Patch value of difference
     */
    public function getMergePatch()
    {
        return $this->merge;

    }

    /**
     * @return array|null|object|\stdClass
     * @throws Exception
     */
    private function rearrange()
    {
        return $this->process($this->original, $this->new);
    }

    /**
     * @param mixed $original
     * @param mixed $new
     * @return array|null|object|\stdClass
     * @throws Exception
     */
    private function process($original, $new)
    {
        $merge = !($this->options & self::SKIP_JSON_MERGE_PATCH);

        if (
            (!$original instanceof \stdClass && !is_array($original))
            || (!$new instanceof \stdClass && !is_array($new))
        ) {
            if ($original !== $new) {
                $this->modifiedCnt++;
                if ($this->options & self::STOP_ON_DIFF) {
                    return null;
                }
                $this->modifiedPaths [] = $this->path;

                if ($this->jsonPatch !== null) {
                    $this->jsonPatch->op(new Test($this->path, $original));
                    $this->jsonPatch->op(new Replace($this->path, $new));
                }

                JsonPointer::add($this->modifiedOriginal, $this->pathItems, $original);
                JsonPointer::add($this->modifiedNew, $this->pathItems, $new);

                if ($merge) {
                    JsonPointer::add($this->merge, $this->pathItems, $new, JsonPointer::RECURSIVE_KEY_CREATION);
                }
            }
            return $new;
        }

        if (
            ($this->options & self::REARRANGE_ARRAYS)
            && is_array($original) && is_array($new)
        ) {
            $new = $this->rearrangeArray($original, $new);
        }

        $newArray = $new instanceof \stdClass ? get_object_vars($new) : $new;
        $newOrdered = array();

        $originalKeys = $original instanceof \stdClass ? get_object_vars($original) : $original;
        $isArray = is_array($original);
        $removedOffset = 0;

        if ($merge && is_array($new) && !is_array($original)) {
            $merge = false;
            JsonPointer::add($this->merge, $this->pathItems, $new);
        } elseif ($merge  && $new instanceof \stdClass && !$original instanceof \stdClass) {
            $merge = false;
            JsonPointer::add($this->merge, $this->pathItems, $new);
        }

        $isUriFragment = (bool)($this->options & self::JSON_URI_FRAGMENT_ID);
        foreach ($originalKeys as $key => $originalValue) {
            if ($this->options & self::STOP_ON_DIFF) {
                if ($this->modifiedCnt || $this->addedCnt || $this->removedCnt) {
                    return null;
                }
            }

            $path = $this->path;
            $pathItems = $this->pathItems;
            $actualKey = $key;
            if ($isArray) {
                $actualKey -= $removedOffset;
            }
            $this->path .= '/' . JsonPointer::escapeSegment((string)$actualKey, $isUriFragment);
            $this->pathItems[] = $actualKey;

            if (array_key_exists($key, $newArray)) {
                $newOrdered[$key] = $this->process($originalValue, $newArray[$key]);
                unset($newArray[$key]);
            } else {
                $this->removedCnt++;
                if ($this->options & self::STOP_ON_DIFF) {
                    return null;
                }
                $this->removedPaths [] = $this->path;
                if ($isArray) {
                    $removedOffset++;
                }

                if ($this->jsonPatch !== null) {
                    $this->jsonPatch->op(new Remove($this->path));
                }

                JsonPointer::add($this->removed, $this->pathItems, $originalValue);
                if ($merge) {
                    JsonPointer::add($this->merge, $this->pathItems, null);
                }

            }
            $this->path = $path;
            $this->pathItems = $pathItems;
        }

        // additions
        foreach ($newArray as $key => $value) {
            $this->addedCnt++;
            if ($this->options & self::STOP_ON_DIFF) {
                return null;
            }
            $newOrdered[$key] = $value;
            $path = $this->path . '/' . JsonPointer::escapeSegment($key, $isUriFragment);
            $pathItems = $this->pathItems;
            $pathItems[] = $key;
            JsonPointer::add($this->added, $pathItems, $value);
            if ($merge) {
                JsonPointer::add($this->merge, $pathItems, $value);
            }

            $this->addedPaths [] = $path;

            if ($this->jsonPatch !== null) {
                $this->jsonPatch->op(new Add($path, $value));
            }

        }

        return is_array($new) ? $newOrdered : (object)$newOrdered;
    }

    private function rearrangeArray(array $original, array $new)
    {
        $first = reset($original);
        if (!$first instanceof \stdClass) {
            return $new;
        }

        $uniqueKey = false;
        $uniqueIdx = array();

        // find unique key for all items
        /** @var mixed[string]  $f */
        $f = get_object_vars($first);
        foreach ($f as $key => $value) {
            if (is_array($value) || $value instanceof \stdClass) {
                continue;
            }

            $keyIsUnique = true;
            $uniqueIdx = array();
            foreach ($original as $item) {
                if (!$item instanceof \stdClass) {
                    return $new;
                }
                if (!isset($item->$key)) {
                    $keyIsUnique = false;
                    break;
                }
                $value = $item->$key;
                if ($value instanceof \stdClass || is_array($value)) {
                    $keyIsUnique = false;
                    break;
                }

                if (isset($uniqueIdx[$value])) {
                    $keyIsUnique = false;
                    break;
                }
                $uniqueIdx[$value] = true;
            }

            if ($keyIsUnique) {
                $uniqueKey = $key;
                break;
            }
        }

        if ($uniqueKey) {

            $newIdx = array();
            foreach ($new as $item) {
                if (!$item instanceof \stdClass) {
                    return $new;
                }

                if (!property_exists($item, $uniqueKey)) {
                    return $new;
                }

                $value = $item->$uniqueKey;

                if ($value instanceof \stdClass || is_array($value)) {
                    return $new;
                }

                if (isset($newIdx[$value])) {
                    return $new;
                }

                $newIdx[$value] = $item;
            }

            $newRearranged = array();
            foreach ($uniqueIdx as $key => $item) {
                if (isset($newIdx[$key])) {
                    $newRearranged [] = $newIdx[$key];
                    unset($newIdx[$key]);
                }
            }
            foreach ($newIdx as $item) {
                $newRearranged [] = $item;
            }
            return $newRearranged;
        }

        return $new;
    }
}

1		<?php
2
3		namespace Swaggest\JsonDiff;
4
5		use Swaggest\JsonDiff\JsonPatch\Add;
6		use Swaggest\JsonDiff\JsonPatch\Remove;
7		use Swaggest\JsonDiff\JsonPatch\Replace;
8		use Swaggest\JsonDiff\JsonPatch\Test;
9
10		class JsonDiff
11		{
12		/**
13		* REARRANGE_ARRAYS is an option to enable arrays rearrangement to minimize the difference.
14		*/
15		const REARRANGE_ARRAYS = 1;
16
17		/**
18		* STOP_ON_DIFF is an option to improve performance by stopping comparison when a difference is found.
19		*/
20		const STOP_ON_DIFF = 2;
21
22		/**
23		* JSON_URI_FRAGMENT_ID is an option to use URI Fragment Identifier Representation (example: "#/c%25d").
24		* If not set default JSON String Representation (example: "/c%d").
25		*/
26		const JSON_URI_FRAGMENT_ID = 4;
27
28		/**
29		* SKIP_JSON_PATCH is an option to improve performance by not building JsonPatch for this diff.
30		*/
31		const SKIP_JSON_PATCH = 8;
32
33		/**
34		* SKIP_JSON_MERGE_PATCH is an option to improve performance by not building JSON Merge Patch value for this diff.
35		*/
36		const SKIP_JSON_MERGE_PATCH = 16;
37
38		private $options = 0;
39		private $original;
40		private $new;
41
42		/**
43		* @var mixed Merge patch container
44		*/
45		private $merge;
46
47		private $added;
48		private $addedCnt = 0;
49		private $addedPaths = array();
50
51		private $removed;
52		private $removedCnt = 0;
53		private $removedPaths = array();
54
55		private $modifiedOriginal;
56		private $modifiedNew;
57		private $modifiedCnt = 0;
58		private $modifiedPaths = array();
59
60		private $path = '';
61		private $pathItems = array();
62
63		private $rearranged;
64
65		/** @var JsonPatch */
66		private $jsonPatch;
67
68		/**
69		* @param mixed $original
70		* @param mixed $new
71		* @param int $options
72		* @throws Exception
73		*/
74	46	public function __construct($original, $new, $options = 0)
75		{
76	46	if (!($options & self::SKIP_JSON_PATCH)) {
77	46	$this->jsonPatch = new JsonPatch();
78		}
79
80	46	$this->original = $original;
81	46	$this->new = $new;
82	46	$this->options = $options;
83
84	46	if ($options & self::JSON_URI_FRAGMENT_ID) {
85	1	$this->path = '#';
86		}
87
88	46	$this->rearranged = $this->rearrange();
89	46	if (($new !== null) && $this->merge === null) {
90	19	$this->merge = new \stdClass();
91		}
92	46	}
93
94		/**
95		* Returns total number of differences
96		* @return int
97		*/
98	20	public function getDiffCnt()
99		{
100	20	return $this->addedCnt + $this->modifiedCnt + $this->removedCnt;
101		}
102
103		/**
104		* Returns removals as partial value of original.
105		* @return mixed
106		*/
107	4	public function getRemoved()
108		{
109	4	return $this->removed;
110		}
111
112		/**
113		* Returns list of `JSON` paths that were removed from original.
114		* @return array
115		*/
116	4	public function getRemovedPaths()
117		{
118	4	return $this->removedPaths;
119		}
120
121		/**
122		* Returns number of removals.
123		* @return int
124		*/
125	4	public function getRemovedCnt()
126		{
127	4	return $this->removedCnt;
128		}
129
130		/**
131		* Returns additions as partial value of new.
132		* @return mixed
133		*/
134	1	public function getAdded()
135		{
136	1	return $this->added;
137		}
138
139		/**
140		* Returns number of additions.
141		* @return int
142		*/
143	1	public function getAddedCnt()
144		{
145	1	return $this->addedCnt;
146		}
147
148		/**
149		* Returns list of `JSON` paths that were added to new.
150		* @return array
151		*/
152	1	public function getAddedPaths()
153		{
154	1	return $this->addedPaths;
155		}
156
157		/**
158		* Returns changes as partial value of original.
159		* @return mixed
160		*/
161	1	public function getModifiedOriginal()
162		{
163	1	return $this->modifiedOriginal;
164		}
165
166		/**
167		* Returns changes as partial value of new.
168		* @return mixed
169		*/
170	1	public function getModifiedNew()
171		{
172	1	return $this->modifiedNew;
173		}
174
175		/**
176		* Returns number of changes.
177		* @return int
178		*/
179	2	public function getModifiedCnt()
180		{
181	2	return $this->modifiedCnt;
182		}
183
184		/**
185		* Returns list of `JSON` paths that were changed from original to new.
186		* @return array
187		*/
188	1	public function getModifiedPaths()
189		{
190	1	return $this->modifiedPaths;
191		}
192
193		/**
194		* Returns new value, rearranged with original order.
195		* @return array\|object
196		*/
197	3	public function getRearranged()
198		{
199	3	return $this->rearranged;
200		}
201
202		/**
203		* Returns JsonPatch of difference
204		* @return JsonPatch
205		*/
206	6	public function getPatch()
207		{
208	6	return $this->jsonPatch;
209		}
210
211		/**
212		* Returns JSON Merge Patch value of difference
213		*/
214	19	public function getMergePatch()
215		{
216	19	return $this->merge;
217
218		}
219
220		/**
221		* @return array\|null\|object\|\stdClass
222		* @throws Exception
223		*/
224	46	private function rearrange()
225		{
226	46	return $this->process($this->original, $this->new);
227		}
228
229		/**
230		* @param mixed $original
231		* @param mixed $new
232		* @return array\|null\|object\|\stdClass
233		* @throws Exception
234		*/
235	46	private function process($original, $new)
236		{
237	46	$merge = !($this->options & self::SKIP_JSON_MERGE_PATCH);
238
239		if (
240	46	(!$original instanceof \stdClass && !is_array($original))
241	46	\|\| (!$new instanceof \stdClass && !is_array($new))
242		) {
243	39	if ($original !== $new) {
244	20	$this->modifiedCnt++;
245	20	if ($this->options & self::STOP_ON_DIFF) {
246	4	return null;
247		}
248	16	$this->modifiedPaths [] = $this->path;
249
250	16	if ($this->jsonPatch !== null) {
251	16	$this->jsonPatch->op(new Test($this->path, $original));
252	16	$this->jsonPatch->op(new Replace($this->path, $new));
253		}
254
255	16	JsonPointer::add($this->modifiedOriginal, $this->pathItems, $original);
256	16	JsonPointer::add($this->modifiedNew, $this->pathItems, $new);
257
258	16	if ($merge) {
259	16	JsonPointer::add($this->merge, $this->pathItems, $new, JsonPointer::RECURSIVE_KEY_CREATION);
260		}
261		}
262	35	return $new;
263		}
264
265		if (
266	36	($this->options & self::REARRANGE_ARRAYS)
267	36	&& is_array($original) && is_array($new)
268		) {
269	4	$new = $this->rearrangeArray($original, $new);
270		}
271
272	36	$newArray = $new instanceof \stdClass ? get_object_vars($new) : $new;
273	36	$newOrdered = array();
274
275	36	$originalKeys = $original instanceof \stdClass ? get_object_vars($original) : $original;
276	36	$isArray = is_array($original);
277	36	$removedOffset = 0;
278
279	36	if ($merge && is_array($new) && !is_array($original)) {
280	2	$merge = false;
281	2	JsonPointer::add($this->merge, $this->pathItems, $new);
282	34	} elseif ($merge && $new instanceof \stdClass && !$original instanceof \stdClass) {
283	4	$merge = false;
284	4	JsonPointer::add($this->merge, $this->pathItems, $new);
285		}
286
287	36	$isUriFragment = (bool)($this->options & self::JSON_URI_FRAGMENT_ID);
288	36	foreach ($originalKeys as $key => $originalValue) {
289	35	if ($this->options & self::STOP_ON_DIFF) {
290	7	if ($this->modifiedCnt \|\| $this->addedCnt \|\| $this->removedCnt) {
291	1	return null;
292		}
293		}
294
295	35	$path = $this->path;
296	35	$pathItems = $this->pathItems;
297	35	$actualKey = $key;
298	35	if ($isArray) {
299	16	$actualKey -= $removedOffset;
300		}
301	35	$this->path .= '/' . JsonPointer::escapeSegment((string)$actualKey, $isUriFragment);
302	35	$this->pathItems[] = $actualKey;
303
304	35	if (array_key_exists($key, $newArray)) {
305	30	$newOrdered[$key] = $this->process($originalValue, $newArray[$key]);
306	30	unset($newArray[$key]);
307		} else {
308	17	$this->removedCnt++;
309	17	if ($this->options & self::STOP_ON_DIFF) {
310	2	return null;
311		}
312	15	$this->removedPaths [] = $this->path;
313	15	if ($isArray) {
314	3	$removedOffset++;
315		}
316
317	15	if ($this->jsonPatch !== null) {
318	15	$this->jsonPatch->op(new Remove($this->path));
319		}
320
321	15	JsonPointer::add($this->removed, $this->pathItems, $originalValue);
322	15	if ($merge) {
323	12	JsonPointer::add($this->merge, $this->pathItems, null);
324		}
325
326		}
327	34	$this->path = $path;
328	34	$this->pathItems = $pathItems;
329		}
330
331		// additions
332	34	foreach ($newArray as $key => $value) {
333	15	$this->addedCnt++;
334	15	if ($this->options & self::STOP_ON_DIFF) {
335	2	return null;
336		}
337	13	$newOrdered[$key] = $value;
338	13	$path = $this->path . '/' . JsonPointer::escapeSegment($key, $isUriFragment);
339	13	$pathItems = $this->pathItems;
340	13	$pathItems[] = $key;
341	13	JsonPointer::add($this->added, $pathItems, $value);
342	13	if ($merge) {
343	9	JsonPointer::add($this->merge, $pathItems, $value);
344		}
345
346	13	$this->addedPaths [] = $path;
347
348	13	if ($this->jsonPatch !== null) {
349	13	$this->jsonPatch->op(new Add($path, $value));
350		}
351
352		}
353
354	34	return is_array($new) ? $newOrdered : (object)$newOrdered;
355		}
356
357	4	private function rearrangeArray(array $original, array $new)
358		{
359	4	$first = reset($original);
360	4	if (!$first instanceof \stdClass) {
361	2	return $new;
362		}
363
364	4	$uniqueKey = false;
365	4	$uniqueIdx = array();
366
367		// find unique key for all items
368		/** @var mixed[string] $f */
369	4	$f = get_object_vars($first);
370	4	foreach ($f as $key => $value) {
371	4	if (is_array($value) \|\| $value instanceof \stdClass) {
372		continue;
373		}
374
375	4	$keyIsUnique = true;
376	4	$uniqueIdx = array();
377	4	foreach ($original as $item) {
378	4	if (!$item instanceof \stdClass) {
379		return $new;
380		}
381	4	if (!isset($item->$key)) {
382		$keyIsUnique = false;
383		break;
384		}
385	4	$value = $item->$key;
386	4	if ($value instanceof \stdClass \|\| is_array($value)) {
387		$keyIsUnique = false;
388		break;
389		}
390
391	4	if (isset($uniqueIdx[$value])) {
392		$keyIsUnique = false;
393		break;
394		}
395	4	$uniqueIdx[$value] = true;
396		}
397
398	4	if ($keyIsUnique) {
399	4	$uniqueKey = $key;
400	4	break;
401		}
402		}
403
404	4	if ($uniqueKey) {
		0 ignored issues – show introduced 2018-04-28 04:41 UTC by Report Bug Copy Issue Report `$uniqueKey` is of type `mixed`, thus it always evaluated to `false`. Loading history...
405	4	$newIdx = array();
406	4	foreach ($new as $item) {
407	4	if (!$item instanceof \stdClass) {
408		return $new;
409		}
410
411	4	if (!property_exists($item, $uniqueKey)) {
412		return $new;
413		}
414
415	4	$value = $item->$uniqueKey;
416
417	4	if ($value instanceof \stdClass \|\| is_array($value)) {
418		return $new;
419		}
420
421	4	if (isset($newIdx[$value])) {
422		return $new;
423		}
424
425	4	$newIdx[$value] = $item;
426		}
427
428	4	$newRearranged = array();
429	4	foreach ($uniqueIdx as $key => $item) {
430	4	if (isset($newIdx[$key])) {
431	4	$newRearranged [] = $newIdx[$key];
432	4	unset($newIdx[$key]);
433		}
434		}
435	4	foreach ($newIdx as $item) {
436		$newRearranged [] = $item;
437		}
438	4	return $newRearranged;
439		}
440
441		return $new;
442		}
443		}

swaggest / json-diff

Pull Request — master (#15)

JsonDiff::getModifiedOriginal() A

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