Failed Conditions
Pull Request — master (#3361)
by
unknown
02:56
created

MediaDiff::showFileDiff()   C

Complexity

Conditions 11
Paths 72

Size

Total Lines 76

Duplication

Lines 0
Ratio 0 %

Importance

Changes 0
Metric Value
cc 11
nc 72
nop 5
dl 0
loc 76
rs 6.3769
c 0
b 0
f 0

How to fix   Long Method    Complexity   

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

1
<?php
2
3
namespace dokuwiki\Ui;
4
5
use dokuwiki\ChangeLog\MediaChangeLog;
6
use dokuwiki\Extension\Event;
7
use dokuwiki\Form\Form;
8
9
/**
10
 * DokuWiki MediaDiff Interface
11
 *
12
 * @package dokuwiki\Ui
13
 */
14
class MediaDiff extends Diff
15
{
16
    /**
17
     * MediaDiff Ui constructor
18
     *
19
     * @param string $id  media id
20
     */
21
    public function __construct($id)
22
    {
23
        $this->id = $id;
24
        $this->item = 'media';
25
26
        // init preference
27
        $this->preference['fromAjax'] = false; // see doluwiki\Ajax::callMediadiff()
28
        $this->preference['showIntro'] = false;
29
        $this->preference['difftype'] = 'both';  // media diff view type: both, opacity or portions
30
31
        $this->setChangeLog();
32
    }
33
34
    /** @inheritdoc */
35
    protected function setChangeLog()
36
    {
37
        $this->changelog = new MediaChangeLog($this->id);
0 ignored issues
show
Documentation Bug introduced by
It seems like new \dokuwiki\ChangeLog\MediaChangeLog($this->id) of type object<dokuwiki\ChangeLog\MediaChangeLog> is incompatible with the declared type object<dokuwiki\Ui\ChangeLog> of property $changelog.

Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.

Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..

Loading history...
38
    }
39
40
    /** @inheritdoc */
41
    protected function preProcess()
42
    {
43
        parent::preProcess();
44
        if (!isset($this->oldRev, $this->newRev)) {
45
            // no revision was given, compare previous to current
46
            $revs = $this->changelog->getRevisions(0, 1);
47
            $this->oldRev = file_exists(mediaFN($this->id, $revs[0])) ? $revs[0] : '';
48
            $this->newRev = '';
49
        }
50
    }
51
52
    /**
53
     * Shows difference between two revisions of media
54
     *
55
     * @author Kate Arzamastseva <[email protected]>
56
     */
57
    public function show()
58
    {
59
        global $conf;
60
61
        $ns = getNS($this->id);
62
        $auth = auth_quickaclcheck("$ns:*");
63
64
        if ($auth < AUTH_READ || !$this->id || !$conf['mediarevisions']) return '';
65
66
       // determine left and right revision
67
        if (!isset($this->oldRev, $this->newRev)) $this->preProcess();
68
        [$oldRev, $newRev] = [$this->oldRev, $this->newRev];
0 ignored issues
show
Bug introduced by
The variable $oldRev seems only to be defined at a later point. Did you maybe move this code here without moving the variable definition?

This error can happen if you refactor code and forget to move the variable initialization.

Let’s take a look at a simple example:

function someFunction() {
    $x = 5;
    echo $x;
}

The above code is perfectly fine. Now imagine that we re-order the statements:

function someFunction() {
    echo $x;
    $x = 5;
}

In that case, $x would be read before it is initialized. This was a very basic example, however the principle is the same for the found issue.

Loading history...
Bug introduced by
The variable $newRev seems only to be defined at a later point. Did you maybe move this code here without moving the variable definition?

This error can happen if you refactor code and forget to move the variable initialization.

Let’s take a look at a simple example:

function someFunction() {
    $x = 5;
    echo $x;
}

The above code is perfectly fine. Now imagine that we re-order the statements:

function someFunction() {
    echo $x;
    $x = 5;
}

In that case, $x would be read before it is initialized. This was a very basic example, however the principle is the same for the found issue.

Loading history...
69
70
        // prepare event data
71
        // NOTE: MEDIA_DIFF event does not found in DokuWiki Event List?
72
        $data = array();
73
        $data[0] = $this->id;
74
        $data[1] = $oldRev;
0 ignored issues
show
Bug introduced by
The variable $oldRev seems only to be defined at a later point. Did you maybe move this code here without moving the variable definition?

This error can happen if you refactor code and forget to move the variable initialization.

Let’s take a look at a simple example:

function someFunction() {
    $x = 5;
    echo $x;
}

The above code is perfectly fine. Now imagine that we re-order the statements:

function someFunction() {
    echo $x;
    $x = 5;
}

In that case, $x would be read before it is initialized. This was a very basic example, however the principle is the same for the found issue.

Loading history...
75
        $data[2] = $newRev;
0 ignored issues
show
Bug introduced by
The variable $newRev seems only to be defined at a later point. Did you maybe move this code here without moving the variable definition?

This error can happen if you refactor code and forget to move the variable initialization.

Let’s take a look at a simple example:

function someFunction() {
    $x = 5;
    echo $x;
}

The above code is perfectly fine. Now imagine that we re-order the statements:

function someFunction() {
    echo $x;
    $x = 5;
}

In that case, $x would be read before it is initialized. This was a very basic example, however the principle is the same for the found issue.

Loading history...
76
        $data[3] = $ns;
77
        $data[4] = $auth; // permission level
78
        $data[5] = $this->preference['fromAjax'];
79
80
        // trigger event
81
        Event::createAndTrigger('MEDIA_DIFF', $data, null, false);
82
83
        if (is_array($data) && count($data) === 6) {
84
            $this->id = $data[0];
85
            $oldRev = $data[1];
86
            $newRev = $data[2];
87
            $ns     = $data[3];
0 ignored issues
show
Unused Code introduced by
$ns is not used, you could remove the assignment.

This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently.

$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}

Both the $myVar assignment in line 1 and the $higher assignment in line 2 are dead. The first because $myVar is never used and the second because $higher is always overwritten for every possible time line.

Loading history...
88
            $auth   = $data[4];
89
            $this->preference['fromAjax'] = $data[5];
90
        } else {
91
            return '';
92
        }
93
94
        $oldRevMeta = new \JpegMeta(mediaFN($this->id, $oldRev));
95
        $newRevMeta = new \JpegMeta(mediaFN($this->id, $newRev));
96
97
        $is_img = preg_match('/\.(jpe?g|gif|png)$/', $this->id);
98
        if ($is_img) {
99
            // get image width and height for the mediamanager preview panel
100
            $oldRevSize = media_image_preview_size($this->id, $oldRev, $oldRevMeta);
101
            $newRevSize = media_image_preview_size($this->id, $newRev, $newRevMeta);
102
            // re-check image, ensure minimum image width for showImageDiff()
103
            $is_img = ($oldRevSize && $newRevSize && ($oldRevSize[0] >= 30 || $newRevSize[0] >= 30));
104
        }
105
106
        // determine requested diff view type
107
        if (!$is_img) {
108
            $this->preference['difftype'] = 'both';
109
        }
110
111
        // display intro
112
        if ($this->preference['showIntro']) echo p_locale_xhtml('diff');
113
114
        // print form to choose diff view type
115
        if ($is_img && !$this->preference['fromAjax']) {
116
            $this->showDiffViewSelector();
117
            echo '<div id="mediamanager__diff" >';
118
        }
119
120
        switch ($this->preference['difftype']) {
121
            case 'opacity':
122
            case 'portions':
123
                $this->showImageDiff($oldRev, $newRev, $oldRevSize, $newRevSize, $difftype);
0 ignored issues
show
Bug introduced by
The variable $oldRevSize does not seem to be defined for all execution paths leading up to this point.

If you define a variable conditionally, it can happen that it is not defined for all execution paths.

Let’s take a look at an example:

function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}

In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.

Available Fixes

  1. Check for existence of the variable explicitly:

    function myFunction($a) {
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
        }
    
        if (isset($x)) { // Make sure it's always set.
            echo $x;
        }
    }
    
  2. Define a default value for the variable:

    function myFunction($a) {
        $x = ''; // Set a default which gets overridden for certain paths.
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
        }
    
        echo $x;
    }
    
  3. Add a value for the missing path:

    function myFunction($a) {
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
    
            // We add support for the missing case.
            default:
                $x = '';
                break;
        }
    
        echo $x;
    }
    
Loading history...
Bug introduced by
The variable $newRevSize does not seem to be defined for all execution paths leading up to this point.

If you define a variable conditionally, it can happen that it is not defined for all execution paths.

Let’s take a look at an example:

function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}

In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.

Available Fixes

  1. Check for existence of the variable explicitly:

    function myFunction($a) {
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
        }
    
        if (isset($x)) { // Make sure it's always set.
            echo $x;
        }
    }
    
  2. Define a default value for the variable:

    function myFunction($a) {
        $x = ''; // Set a default which gets overridden for certain paths.
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
        }
    
        echo $x;
    }
    
  3. Add a value for the missing path:

    function myFunction($a) {
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
    
            // We add support for the missing case.
            default:
                $x = '';
                break;
        }
    
        echo $x;
    }
    
Loading history...
Bug introduced by
The variable $difftype does not exist. Did you forget to declare it?

This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.

Loading history...
Security Bug introduced by
It seems like $oldRevSize defined by media_image_preview_size..., $oldRev, $oldRevMeta) on line 100 can also be of type false; however, dokuwiki\Ui\MediaDiff::showImageDiff() does only seem to accept array, did you maybe forget to handle an error condition?

This check looks for type mismatches where the missing type is false. This is usually indicative of an error condtion.

Consider the follow example

<?php

function getDate($date)
{
    if ($date !== null) {
        return new DateTime($date);
    }

    return false;
}

This function either returns a new DateTime object or false, if there was an error. This is a typical pattern in PHP programming to show that an error has occurred without raising an exception. The calling code should check for this returned false before passing on the value to another function or method that may not be able to handle a false.

Loading history...
Security Bug introduced by
It seems like $newRevSize defined by media_image_preview_size..., $newRev, $newRevMeta) on line 101 can also be of type false; however, dokuwiki\Ui\MediaDiff::showImageDiff() does only seem to accept array, did you maybe forget to handle an error condition?

This check looks for type mismatches where the missing type is false. This is usually indicative of an error condtion.

Consider the follow example

<?php

function getDate($date)
{
    if ($date !== null) {
        return new DateTime($date);
    }

    return false;
}

This function either returns a new DateTime object or false, if there was an error. This is a typical pattern in PHP programming to show that an error has occurred without raising an exception. The calling code should check for this returned false before passing on the value to another function or method that may not be able to handle a false.

Loading history...
124
                break;
125
            case 'both':
126
            default:
127
                $this->showFileDiff($oldRev, $newRev, $oldRevMeta, $newRevMeta, $auth);
0 ignored issues
show
Documentation introduced by
$oldRevMeta is of type object<JpegMeta>, but the function expects a object<dokuwiki\Ui\JpegMeta>.

It seems like the type of the argument is not accepted by the function/method which you are calling.

In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.

We suggest to add an explicit type cast like in the following example:

function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
Loading history...
Documentation introduced by
$newRevMeta is of type object<JpegMeta>, but the function expects a object<dokuwiki\Ui\JpegMeta>.

It seems like the type of the argument is not accepted by the function/method which you are calling.

In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.

We suggest to add an explicit type cast like in the following example:

function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
Loading history...
128
                break;
129
        }
130
131
        if ($is_img && !$this->preference['fromAjax']) {
132
            echo '</div>';
133
        }
134
    }
135
136
    /**
137
     * Print form to choose diff view type
138
     * the dropdown is to be added through JavaScript, see lib/scripts/media.js
139
     */
140
    protected function showDiffViewSelector()
141
    {
142
        echo '<div class="diffoptions group">';
143
144
        $form = new Form([
145
            'id' => 'mediamanager__form_diffview',
146
            'action' => media_managerURL([], '&'),
147
            'method' => 'get',
148
            'class' => 'diffView',
149
        ]);
150
        $form->addTagOpen('div')->addClass('no');
151
        $form->setHiddenField('sectok', null);
152
        $form->setHiddenField('mediado', 'diff');
153
        $form->setHiddenField('rev2[0]', $this->oldRev ?: 'current');
154
        $form->setHiddenField('rev2[1]', $this->newRev ?: 'current');
155
        $form->addTagClose('div');
156
        echo $form->toHTML();
157
158
        echo '</div>'; // .diffoptions
159
    }
160
161
    /**
162
     * Prints two images side by side
163
     * and slider
164
     *
165
     * @author Kate Arzamastseva <[email protected]>
166
     *
167
     * @param string|int $oldRev revision timestamp, or empty string
168
     * @param string|int $newRev revision timestamp, or empty string
169
     * @param array  $oldRevSize  array with width and height
170
     * @param array  $newRevSize  array with width and height
171
     * @param string $type    diff view type: opacity or portions
172
     */
173
    protected function showImageDiff($oldRev, $newRev, $oldRevSize, $newRevSize, $type = null)
174
    {
175
        if (!isset($type)) {
176
            $type = $this->preference['difftype'];
177
        }
178
179
        // adjust image width, right side (newer) has priority
180
        if ($oldRevSize != $newRevSize) {
181
            if ($newRevSize[0] > $oldRevSize[0]) {
182
                $oldRevSize = $newRevSize;
183
            }
184
        }
185
186
        $oldRevSrc = ml($this->id, ['rev' => $oldRev, 'h' => $oldRevSize[1], 'w' => $oldRevSize[0]]);
187
        $newRevSrc = ml($this->id, ['rev' => $newRev, 'h' => $oldRevSize[1], 'w' => $oldRevSize[0]]);
188
189
        // slider
190
        echo '<div class="slider" style="max-width: '.($oldRevSize[0]-20).'px;" ></div>';
191
192
        // two images in divs
193
        echo '<div class="imageDiff '.$type.'">';
194
        echo '<div class="image1" style="max-width: '.$oldRevSize[0].'px;">';
195
        echo '<img src="'.$oldRevSrc.'" alt="" />';
196
        echo '</div>';
197
        echo '<div class="image2" style="max-width: '.$oldRevSize[0].'px;">';
198
        echo '<img src="'.$newRevSrc.'" alt="" />';
199
        echo '</div>';
200
        echo '</div>';
201
    }
202
203
    /**
204
     * Shows difference between two revisions of media file
205
     *
206
     * @author Kate Arzamastseva <[email protected]>
207
     *
208
     * @param string|int $oldRev revision timestamp, or empty string
209
     * @param string|int $newRev revision timestamp, or empty string
210
     * @param JpegMeta $oldRevMeta
211
     * @param JpegMeta $newRevMeta
212
     * @param int $auth permission level
213
     */
214
    protected function showFileDiff($oldRev, $newRev, $oldRevMeta, $newRevMeta, $auth)
215
    {
216
        // revison info of older file (left side)
217
        $oldRevInfo = $this->getExtendedRevisionInfo($oldRev);
218
        // revison info of newer file (right side)
219
        $newRevInfo = $this->getExtendedRevisionInfo($newRev);
220
221
        // display diff view table
222
        echo '<div class="table">';
223
        echo '<table>';
224
        echo '<tr>';
225
        echo '<th>'. $this->revisionTitle($oldRevInfo) .'</th>';
226
        echo '<th>'. $this->revisionTitle($newRevInfo) .'</th>';
227
        echo '</tr>';
228
229
        echo '<tr class="image">';
230
        echo '<td>';
231
        media_preview($this->id, $auth, $oldRev, $oldRevMeta); // $auth not used in media_preview()?
232
        echo '</td>';
233
234
        echo '<td>';
235
        media_preview($this->id, $auth, $newRev, $newRevMeta);
236
        echo '</td>';
237
        echo '</tr>';
238
239
        echo '<tr class="actions">';
240
        echo '<td>';
241
        media_preview_buttons($this->id, $auth, $oldRev); // $auth used in media_preview_buttons()
242
        echo '</td>';
243
244
        echo '<td>';
245
        media_preview_buttons($this->id, $auth, $newRev);
246
        echo '</td>';
247
        echo '</tr>';
248
249
        $l_tags = media_file_tags($oldRevMeta);
250
        $r_tags = media_file_tags($newRevMeta);
251
        // FIXME r_tags-only stuff
252
        foreach ($l_tags as $key => $l_tag) {
253
            if ($l_tag['value'] != $r_tags[$key]['value']) {
254
                $r_tags[$key]['highlighted'] = true;
255
                $l_tags[$key]['highlighted'] = true;
256
            } elseif (!$l_tag['value'] || !$r_tags[$key]['value']) {
257
                unset($r_tags[$key]);
258
                unset($l_tags[$key]);
259
            }
260
        }
261
262
        echo '<tr>';
263
        foreach (array($l_tags, $r_tags) as $tags) {
264
            echo '<td>';
265
266
            echo '<dl class="img_tags">';
267
            foreach ($tags as $tag) {
268
                $value = cleanText($tag['value']);
269
                if (!$value) $value = '-';
270
                echo '<dt>'.$lang[$tag['tag'][1]].'</dt>';
0 ignored issues
show
Bug introduced by
The variable $lang does not exist. Did you forget to declare it?

This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.

Loading history...
271
                echo '<dd>';
272
                if ($tag['highlighted']) echo '<strong>';
273
                if ($tag['tag'][2] == 'date') {
274
                    echo dformat($value);
275
                } else {
276
                    echo hsc($value);
277
                }
278
                if ($tag['highlighted']) echo '</strong>';
279
                echo '</dd>';
280
            }
281
            echo '</dl>';
282
283
            echo '</td>';
284
        }
285
        echo '</tr>';
286
287
        echo '</table>';
288
        echo '</div>';
289
    }
290
291
    /**
292
     * Revision Title for MediaDiff table headline
293
     *
294
     * @param array $info  Revision info structure of a media file
295
     * @return string
296
     */
297
    protected function revisionTitle(array $info)
298
    {
299
        global $lang;
300
301
        if (isset($info['date'])) {
302
            $rev = $info['date'];
303
            $title = '<bdi><a class="wikilink1" href="'.ml($this->id, ['rev' => $rev]).'">'
304
                   . dformat($rev).'</a></bdi>';
305
        } else {
306
            $title = '&mdash;';
307
        }
308
        if (isset($info['current']) || ($rev && $rev == $INFO['currentrev'])) {
0 ignored issues
show
Bug introduced by
The variable $rev does not seem to be defined for all execution paths leading up to this point.

If you define a variable conditionally, it can happen that it is not defined for all execution paths.

Let’s take a look at an example:

function myFunction($a) {
    switch ($a) {
        case 'foo':
            $x = 1;
            break;

        case 'bar':
            $x = 2;
            break;
    }

    // $x is potentially undefined here.
    echo $x;
}

In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.

Available Fixes

  1. Check for existence of the variable explicitly:

    function myFunction($a) {
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
        }
    
        if (isset($x)) { // Make sure it's always set.
            echo $x;
        }
    }
    
  2. Define a default value for the variable:

    function myFunction($a) {
        $x = ''; // Set a default which gets overridden for certain paths.
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
        }
    
        echo $x;
    }
    
  3. Add a value for the missing path:

    function myFunction($a) {
        switch ($a) {
            case 'foo':
                $x = 1;
                break;
    
            case 'bar':
                $x = 2;
                break;
    
            // We add support for the missing case.
            default:
                $x = '';
                break;
        }
    
        echo $x;
    }
    
Loading history...
Bug introduced by
The variable $INFO does not exist. Did you forget to declare it?

This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.

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309
            $title .= '&nbsp;('.$lang['current'].')';
310
        }
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        // append separator
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        $title .= ($this->preference['difftype'] === 'inline') ? ' ' : '<br />';
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        // supplement
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        if (isset($info['date'])) {
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            $objRevInfo = (new MediaRevisions($this->id))->getObjRevInfo($info);
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            $title .= $objRevInfo->editSummary().' '.$objRevInfo->editor();
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        }
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        return $title;
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    }
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}
324