Link::parseLinks() - Code Metrics - Inspection of "Implement link parsing" - adam-boduch/coyote - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#532)

by Daniel

created 2020-05-26 17:21 UTC

Link::parseLinks() A

↳ Parent: Link

Complexity

Conditions	3
Paths	3

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	3
nc	3
nop	1
dl	0
loc	17
rs	9.7
c	0
b	0
f	0

<?php

namespace Coyote\Services\Parser\Parsers;

use Collective\Html\HtmlBuilder;
use Coyote\Repositories\Contracts\PageRepositoryInterface as PageRepository;
use Coyote\Services\Parser\Parsers\Parentheses\ParenthesesParser;
use Coyote\Services\Parser\Parsers\Parentheses\SymmetricParenthesesChunks;

class Link extends Parser implements ParserInterface
{
    const LINK_TAG_REGEXP = "<a\s[^>]*href=(\"??)([^\" >]*?)\\1[^>]*>(.*)<\/a>";
    const LINK_INTERNAL_REGEXP = '\[\[(.*?)(\|(.*?))*\]\]';

    const REGEXP_EMAIL = '#(^|[\n \[\]\:<>&;]|\()([a-z0-9&\-_.]+?@[\w\-]+\.(?:[\w\-\.]+\.)?[\w]+)#i';

    private const PARENTHESES_LEVEL = 3;

    /**
     * @var PageRepository
     */
    private $page;

    /**
     * @var string
     */
    private $host;

    /**
     * @var HtmlBuilder|null
     */
    private $html;

    /** @var UrlFormatter */
    private $urlParser;

    /**
     * Link constructor.
     *
     * @param PageRepository $page
     * @param string $host
     * @param HtmlBuilder|null $html
     */
    public function __construct(PageRepository $page, string $host, HtmlBuilder $html = null)
    {
        $this->page = $page;
        $this->host = $host;
        $this->html = $html;
        $this->urlParser = new UrlFormatter($host, app('html'), new ParenthesesParser(new SymmetricParenthesesChunks(), self::PARENTHESES_LEVEL));
    }

    /**
     * @param string $text
     * @return string
     */
    public function parse($text)
    {
        // first, make <a> from plain URL's
        // -----------------------------------------
        $text = $this->hashBlock($text, ['code', 'a']);
        $text = $this->hashInline($text, 'img');

        $text = $this->parseUrl($text);
        $text = $this->parseEmail($text);

        $text = $this->unhash($text);
        // ------------------------------------------

        $text = $this->hashBlock($text, 'code');
        $text = $this->hashInline($text, 'img');

        // then, parse internal links and youtube video links
        // --------------------------------------------------
        $text = $this->parseLinks($text);

        $text = $this->hashBlock($text, 'a');

        // at last, parse coyote markup
        $text = $this->parseInternalAccessors($text);

        $text = $this->unhash($text);

        return $text;
    }

    /**
     * @param string $text
     * @return string
     */
    protected function parseLinks($text)
    {
        if (!preg_match_all('/' . self::LINK_TAG_REGEXP . '/siU', $text, $matches, PREG_SET_ORDER)) {
            return $text;
        }

        for ($i = 0, $count = count($matches); $i < $count; $i++) {
            $link = $matches[$i][2];
            $title = $matches[$i][3];
            $match = $matches[$i][0];

            $text = $this->parseInternalLink($text, $match, $link, $title);
            $text = $this->parseYoutubeLinks($text, $match, $link, $title);
        }

        return $text;
    }

    /**
     * @param string $text
     * @param string $match
     * @param string $url
     * @param string $title
     * @return string
     */
    protected function parseInternalLink($text, $match, $url, $title)
    {
        if (urldecode($title) === urldecode($url) && ($path = $this->getPathFromInternalUrl($url)) !== false) {
            $page = $this->page->findByPath($path);

            if ($page) {
                $text = str_replace($match, link_to($url, $page->title), $text);
            }
        }

        return $text;
    }

    /**
     * @param string $text
     * @param string $match
     * @param string $url
     * @param string $title
     * @return string
     */
    protected function parseYoutubeLinks($text, $match, $url, $title)
    {
        if ($this->html === null) {
            return $text;
        }

        if (urldecode($title) !== urldecode($url)) {
            return $text;
        }

        $components = parse_url($url);

        if ($this->isUrl($components)) {
            // get host without "www"
            $host = $this->getHost($components['host']);
            $path = trim($components['path'], '/');

            if ($host === 'youtube.com' && $path === 'watch') {
                parse_str($components['query'], $query);

                if (!empty($query['v'])) {
                    parse_str($components['fragment'] ?? '', $fragments);

                    $text = str_replace(
                        $match,
                        $this->makeIframe($query['v'], $this->timeToSeconds($fragments['t'] ?? null)),
                        $text
                    );
                }
            }

            if ($host === 'youtu.be' && $path !== '') {
                parse_str($components['query'] ?? '', $query);

                $text = str_replace($match, $this->makeIframe($path, $this->timeToSeconds($query['t'] ?? null)), $text);
            }
        }

        return $text;
    }

    /**
     * Parse "old" coyote links like [[Foo/Bar]] to http://4programmers.net/Foo/Bar
     *
     * @param string $text
     * @return string
     */
    protected function parseInternalAccessors($text)
    {
        if (!preg_match_all('/' . self::LINK_INTERNAL_REGEXP . '/i', $text, $matches, PREG_SET_ORDER)) {
            return $text;
        }

        for ($i = 0, $count = count($matches); $i < $count; $i++) {
            $origin = $matches[$i][0];

            $path = '/' . str_replace(' ', '_', trim($matches[$i][1], '/?&'));

            $title = $matches[$i][3] ?? null;
            $hash = $this->getHashFromPath($path);

            $page = $this->page->findByPath($path);
            $attr = [];

            if (empty($page)) {
                $attr = ['class' => 'link-broken', 'title' => 'Dokument nie istnieje'];
                $path = 'Create' . $path;

                if (empty($title)) {
                    $title = str_replace('_', ' ', last(explode('/', $path)));
                }
            } else {
                $path = $page->path;
                $title = $title ?: $page->title;
            }

            $text = str_replace($origin, link_to($path . ($hash ? '#' . $hash : ''), $title, $attr), $text);
        }

        return $text;
    }

    /**
     * @param string $text
     * @return string
     */
    protected function parseUrl(string $text): string
    {
        return $this->urlParser->parse($text);
    }

    /**
     * @param string $text
     * @return string
     */
    protected function parseEmail(string $text): string
    {
        return preg_replace(self::REGEXP_EMAIL, "\$1<a href=\"mailto:\$2\">$2</a>", $text);
    }

    /**
     * @param string|null $time
     * @return null|string
     */
    private function timeToSeconds($time)
    {
        if (!$time) {
            return null;
        }

        if (preg_match('/(\d+)m(\d+)s/', $time, $match)) {
            return ($match[1] * 60) + $match[2];
        }

        return $time;
    }

    /**
     * @param string $videoId
     * @param string $start
     * @return string
     */
    private function makeIframe(string $videoId, string $start = null): string
    {
        $iframe = (string) $this->html->tag('iframe', '', [
            'src'             => 'https://youtube.com/embed/' . $videoId . ($start !== null ? "?start=$start" : ''),
            'class'           => 'embed-responsive-item',
            'allowfullscreen' => 'allowfullscreen'
        ]);

        return (string) $this->html->tag('div', $iframe, ['class' => 'embed-responsive embed-responsive-16by9']);
    }

    /**
     * Get path from url only if it's internal link (false if it's NOT internal link)
     *
     * @example http://4programmers.net/Foo/Bar => /Foo/Bar
     * @param string $url
     * @return string|false
     */
    private function getPathFromInternalUrl($url)
    {
        $components = parse_url($url);
        $path = false;

        if ($this->isUrl($components)) {
            // sprawdzamy, czy mamy do czynienia z linkiem wewnetrznym
            if ($this->host === $this->getHost($components['host'])) {
                $path = urldecode($components['path']);
            }
        }

        return $path;
    }

    /**
     * @param array|false $components
     * @return bool
     */
    private function isUrl($components)
    {
        if (!is_array($components)) {
            return false;
        }

        return (!empty($components['path']) && !empty($components['host']));
    }

    /**
     * @param string $path
     * @return string
     */
    private function getHashFromPath(&$path)
    {
        $hash = '';

        if (($pos = strpos($path, '#')) !== false) {
            $hash = htmlspecialchars(substr($path, $pos + 1));
            $path = substr($path, 0, $pos);
        }

        return $hash;
    }

    /**
     * Get host without "www" at the beginning.
     *
     * @param string $host
     * @return string
     */
    private function getHost(string $host): string
    {
        $parts = explode('.', $host);

        if ($parts[0] === 'www') {
            array_shift($parts);
        }

        return implode('.', $parts);
    }
}


1			<?php
2
3			namespace Coyote\Services\Parser\Parsers;
4
5			use Collective\Html\HtmlBuilder;
6			use Coyote\Repositories\Contracts\PageRepositoryInterface as PageRepository;
7			use Coyote\Services\Parser\Parsers\Parentheses\ParenthesesParser;
8			use Coyote\Services\Parser\Parsers\Parentheses\SymmetricParenthesesChunks;
9
10			class Link extends Parser implements ParserInterface
11			{
12			const LINK_TAG_REGEXP = "<a\s[^>]href=(\"??)([^\" >]?)\\1[^>]>(.)<\/a>";
13			const LINK_INTERNAL_REGEXP = '\[\[(.?)(\\|(.?))*\]\]';
14
15			const REGEXP_EMAIL = '#(^\|[\n \[\]\:<>&;]\|\()([a-z0-9&\-_.]+?@[\w\-]+\.(?:[\w\-\.]+\.)?[\w]+)#i';
16
17			private const PARENTHESES_LEVEL = 3;
18
19			/**
20			* @var PageRepository
21			*/
22			private $page;
23
24			/**
25			* @var string
26			*/
27			private $host;
28
29			/**
30			* @var HtmlBuilder\|null
31			*/
32			private $html;
33
34			/** @var UrlFormatter */
35			private $urlParser;
36
37			/**
38			* Link constructor.
39			*
40			* @param PageRepository $page
41			* @param string $host
42			* @param HtmlBuilder\|null $html
43			*/
44			public function __construct(PageRepository $page, string $host, HtmlBuilder $html = null)
45			{
46			$this->page = $page;
47			$this->host = $host;
48			$this->html = $html;
49			$this->urlParser = new UrlFormatter($host, app('html'), new ParenthesesParser(new SymmetricParenthesesChunks(), self::PARENTHESES_LEVEL));
50			}
51
52			/**
53			* @param string $text
54			* @return string
55			*/
56			public function parse($text)
57			{
58			// first, make <a> from plain URL's
59			// -----------------------------------------
60			$text = $this->hashBlock($text, ['code', 'a']);
61			$text = $this->hashInline($text, 'img');
62
63			$text = $this->parseUrl($text);
64			$text = $this->parseEmail($text);
65
66			$text = $this->unhash($text);
67			// ------------------------------------------
68
69			$text = $this->hashBlock($text, 'code');
70			$text = $this->hashInline($text, 'img');
71
72			// then, parse internal links and youtube video links
73			// --------------------------------------------------
74			$text = $this->parseLinks($text);
75
76			$text = $this->hashBlock($text, 'a');
77
78			// at last, parse coyote markup
79			$text = $this->parseInternalAccessors($text);
80
81			$text = $this->unhash($text);
82
83			return $text;
84			}
85
86			/**
87			* @param string $text
88			* @return string
89			*/
90			protected function parseLinks($text)
91			{
92			if (!preg_match_all('/' . self::LINK_TAG_REGEXP . '/siU', $text, $matches, PREG_SET_ORDER)) {
93			return $text;
94			}
95
96			for ($i = 0, $count = count($matches); $i < $count; $i++) {
97			$link = $matches[$i][2];
98			$title = $matches[$i][3];
99			$match = $matches[$i][0];
100
101			$text = $this->parseInternalLink($text, $match, $link, $title);
102			$text = $this->parseYoutubeLinks($text, $match, $link, $title);
103			}
104
105			return $text;
106			}
107
108			/**
109			* @param string $text
110			* @param string $match
111			* @param string $url
112			* @param string $title
113			* @return string
114			*/
115			protected function parseInternalLink($text, $match, $url, $title)
116			{
117			if (urldecode($title) === urldecode($url) && ($path = $this->getPathFromInternalUrl($url)) !== false) {
118			$page = $this->page->findByPath($path);
119
120			if ($page) {
121			$text = str_replace($match, link_to($url, $page->title), $text);
122			}
123			}
124
125			return $text;
126			}
127
128			/**
129			* @param string $text
130			* @param string $match
131			* @param string $url
132			* @param string $title
133			* @return string
134			*/
135			protected function parseYoutubeLinks($text, $match, $url, $title)
136			{
137			if ($this->html === null) {
138			return $text;
139			}
140
141			if (urldecode($title) !== urldecode($url)) {
142			return $text;
143			}
144
145			$components = parse_url($url);
146
147			if ($this->isUrl($components)) {
148			// get host without "www"
149			$host = $this->getHost($components['host']);
150			$path = trim($components['path'], '/');
151
152			if ($host === 'youtube.com' && $path === 'watch') {
153			parse_str($components['query'], $query);
154
155			if (!empty($query['v'])) {
156			parse_str($components['fragment'] ?? '', $fragments);
157
158			$text = str_replace(
159			$match,
160			$this->makeIframe($query['v'], $this->timeToSeconds($fragments['t'] ?? null)),
161			$text
162			);
163			}
164			}
165
166			if ($host === 'youtu.be' && $path !== '') {
167			parse_str($components['query'] ?? '', $query);
168
169			$text = str_replace($match, $this->makeIframe($path, $this->timeToSeconds($query['t'] ?? null)), $text);
170			}
171			}
172
173			return $text;
174			}
175
176			/**
177			* Parse "old" coyote links like [[Foo/Bar]] to http://4programmers.net/Foo/Bar
178			*
179			* @param string $text
180			* @return string
181			*/
182			protected function parseInternalAccessors($text)
183			{
184			if (!preg_match_all('/' . self::LINK_INTERNAL_REGEXP . '/i', $text, $matches, PREG_SET_ORDER)) {
185			return $text;
186			}
187
188			for ($i = 0, $count = count($matches); $i < $count; $i++) {
189			$origin = $matches[$i][0];
190
191			$path = '/' . str_replace(' ', '_', trim($matches[$i][1], '/?&'));
192
193			$title = $matches[$i][3] ?? null;
194			$hash = $this->getHashFromPath($path);
195
196			$page = $this->page->findByPath($path);
197			$attr = [];
198
199			if (empty($page)) {
200			$attr = ['class' => 'link-broken', 'title' => 'Dokument nie istnieje'];
201			$path = 'Create' . $path;
202
203			if (empty($title)) {
204			$title = str_replace('_', ' ', last(explode('/', $path)));
205			}
206			} else {
207			$path = $page->path;
208			$title = $title ?: $page->title;
209			}
210
211			$text = str_replace($origin, link_to($path . ($hash ? '#' . $hash : ''), $title, $attr), $text);
212			}
213
214			return $text;
215			}
216
217			/**
218			* @param string $text
219			* @return string
220			*/
221			protected function parseUrl(string $text): string
222			{
223			return $this->urlParser->parse($text);
224			}
225
226			/**
227			* @param string $text
228			* @return string
229			*/
230			protected function parseEmail(string $text): string
231			{
232			return preg_replace(self::REGEXP_EMAIL, "\$1<a href=\"mailto:\$2\">$2</a>", $text);
233			}
234
235			/**
236			* @param string\|null $time
237			* @return null\|string
238			*/
239			private function timeToSeconds($time)
240			{
241			if (!$time) {
242			return null;
243			}
244
245			if (preg_match('/(\d+)m(\d+)s/', $time, $match)) {
246			return ($match[1] * 60) + $match[2];
247			}
248
249			return $time;
250			}
251
252			/**
253			* @param string $videoId
254			* @param string $start
255			* @return string
256			*/
257			private function makeIframe(string $videoId, string $start = null): string
258			{
259			$iframe = (string) $this->html->tag('iframe', '', [
260			'src' => 'https://youtube.com/embed/' . $videoId . ($start !== null ? "?start=$start" : ''),
261			'class' => 'embed-responsive-item',
262			'allowfullscreen' => 'allowfullscreen'
263			]);
264
265			return (string) $this->html->tag('div', $iframe, ['class' => 'embed-responsive embed-responsive-16by9']);
266			}
267
268			/**
269			* Get path from url only if it's internal link (false if it's NOT internal link)
270			*
271			* @example http://4programmers.net/Foo/Bar => /Foo/Bar
272			* @param string $url
273			* @return string\|false
274			*/
275			private function getPathFromInternalUrl($url)
276			{
277			$components = parse_url($url);
278			$path = false;
279
280			if ($this->isUrl($components)) {
281			// sprawdzamy, czy mamy do czynienia z linkiem wewnetrznym
282			if ($this->host === $this->getHost($components['host'])) {
283			$path = urldecode($components['path']);
284			}
285			}
286
287			return $path;
288			}
289
290			/**
291			* @param array\|false $components
292			* @return bool
293			*/
294			private function isUrl($components)
295			{
296			if (!is_array($components)) {
297			return false;
298			}
299
300			return (!empty($components['path']) && !empty($components['host']));
301			}
302
303			/**
304			* @param string $path
305			* @return string
306			*/
307			private function getHashFromPath(&$path)
308			{
309			$hash = '';
310
311			if (($pos = strpos($path, '#')) !== false) {
312			$hash = htmlspecialchars(substr($path, $pos + 1));
313			$path = substr($path, 0, $pos);
314			}
315
316			return $hash;
317			}
318
319			/**
320			* Get host without "www" at the beginning.
321			*
322			* @param string $host
323			* @return string
324			*/
325			private function getHost(string $host): string
326			{
327			$parts = explode('.', $host);
328
329			if ($parts[0] === 'www') {
330			array_shift($parts);
331			}
332
333			return implode('.', $parts);
334			}
335			}
336

adam-boduch / coyote

Pull Request — master (#532)

Link::parseLinks() A

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

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