<?php

namespace Roundcube\Tests\Framework;

use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;

/**
 * Test class to test rcube_washtml class
 */
class WashtmlTest extends TestCase
{
    /**
     * A helper method to remove comments added by rcube_washtml
     */
    public function cleanupResult($html)
    {
        return preg_replace('/<!-- [a-z]+ (ignored|not allowed) -->/', '', $html);
    }

    /**
     * Test the elimination of some XSS vulnerabilities
     */
    public function test_html_xss()
    {
        // #1488850
        $html = '<a href="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">Firefox</a>'
            . '<a href="vbscript:alert(document.cookie)">Internet Explorer</a></p>'
            . '<A href="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">Firefox</a>'
            . '<A HREF="vbscript:alert(document.cookie)">Internet Explorer</a>'
            . '<a href="data:application/xhtml+xml;base64,PGh0bW">CLICK ME</a>'; // #6896

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertDoesNotMatchRegularExpression('/data:text/', $washed, 'Remove data:text/html links');
        $this->assertDoesNotMatchRegularExpression('/vbscript:/', $washed, 'Remove vbscript: links');
        $this->assertDoesNotMatchRegularExpression('/data:application/', $washed, 'Remove data:application links');
    }

    /**
     * Test fixing of invalid href
     */
    public function test_href()
    {
        $html = "<p><a href=\"\nhttp://test.com\n\">Firefox</a><a href=\"domain.com\">Firefox</a>";

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertMatchesRegularExpression('|href="http://test\.com"|', $washed, 'Link href with newlines (#1488940)');
        $this->assertMatchesRegularExpression('|href="http://domain\.com"|', $washed, 'Link href with no protocol (#7454)');
    }

    /**
     * Test data:image with newlines (#8613)
     */
    public function test_data_image_with_newline()
    {
        $html = "<p><img src=\"data:image/png;base64,12345\n\t67890\" /></p>";

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertSame("<p><img src=\"data:image/png;base64,12345\n\t67890\" /></p>", $this->cleanupResult($washed));
    }

    /**
     * Test XSS in area's href (#5240)
     */
    public function test_href_area()
    {
        $html = '<p><area href="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">'
            . '<area href="vbscript:alert(document.cookie)">Internet Explorer</p>'
            . '<area href="javascript:alert(document.domain)" shape=default>'
            . '<p><AREA HREF="data:text/html,&lt;script&gt;alert(document.cookie)&lt;/script&gt;">'
            . '<Area href="vbscript:alert(document.cookie)">Internet Explorer</p>'
            . '<area HREF="javascript:alert(document.domain)" shape=default>';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertDoesNotMatchRegularExpression('/data:text/', $washed, 'data:text/html in area href');
        $this->assertDoesNotMatchRegularExpression('/vbscript:/', $washed, 'vbscript: in area href');
        $this->assertDoesNotMatchRegularExpression('/javascript:/', $washed, 'javascript: in area href');
    }

    /**
     * Test removing of object tag, but keeping innocent children
     */
    public function test_object()
    {
        $html = "<div>\n<object data=\"move.swf\" type=\"application/x-shockwave-flash\">\n"
               . "<param name=\"foo\" value=\"bar\">\n"
               . '<p>This alternative text should survive</p>'
               . "</object>\n</div>";
        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertDoesNotMatchRegularExpression('/<\/?object/', $washed, 'Remove object tag');
        $this->assertDoesNotMatchRegularExpression('/<param/', $washed, 'Remove param tag');
        $this->assertMatchesRegularExpression('/<p>/', $washed, 'Keep embedded tags');
    }

    /**
     * Test handling HTML comments
     */
    public function test_comments()
    {
        $washer = new \rcube_washtml();

        $html = '<!--[if gte mso 10]><p>p1</p><!--><p>p2</p>';
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame('<p>p2</p>', $washed, 'HTML conditional comments (#1489004)');

        $html = '<!--TestCommentInvalid><p>test</p>';
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame('<p>test</p>', $washed, 'HTML invalid comments (#1487759)');

        $html = '<p>para1</p><!-- comment --><p>para2</p>';
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame('<p>para1</p><p>para2</p>', $washed, 'HTML comments - simple comment');

        $html = '<p>para1</p><!-- <hr> comment --><p>para2</p>';
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame('<p>para1</p><p>para2</p>', $washed, 'HTML comments - tags inside (#1489904)');

        $html = '<p>para1</p><!-- comment => comment --><p>para2</p>';
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame('<p>para1</p><p>para2</p>', $washed, 'HTML comments - bracket inside');

        $html = "<p><!-- span>1</span -->\n<span>2</span>\n<!-- >3</span --><span>4</span></p>";
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame("<p>\n<span>2</span>\n<span>4</span></p>", $washed, 'HTML comments (#6464)');
    }

    /**
     * Test fixing of invalid self-closing elements (#1489137)
     */
    public function test_self_closing()
    {
        $html = '<textarea>test';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertMatchesRegularExpression('|<textarea>test</textarea>|', $washed);
    }

    /**
     * Test fixing of invalid closing tags (#1489446)
     */
    public function test_closing_tag_attrs()
    {
        $html = '<a href="http://test.com">test</a href>';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertMatchesRegularExpression('|</a>|', $washed);
    }

    /**
     * Test fixing of invalid lists nesting (#1488768)
     */
    public function test_lists()
    {
        $data = [
            [
                '<ol><li>First</li><li>Second</li><ul><li>First sub</li></ul><li>Third</li></ol>',
                '<ol><li>First</li><li>Second<ul><li>First sub</li></ul></li><li>Third</li></ol>',
            ],
            [
                '<ol><li>First<ul><li>First sub</li></ul></li></ol>',
                '<ol><li>First<ul><li>First sub</li></ul></li></ol>',
            ],
            [
                '<ol><li>First<ol><li>First sub</li></ol></li></ol>',
                '<ol><li>First<ol><li>First sub</li></ol></li></ol>',
            ],
            [
                '<ul><li>First</li><ul><li>First sub</li><ul><li>sub sub</li></ul></ul><li></li></ul>',
                '<ul><li>First<ul><li>First sub<ul><li>sub sub</li></ul></li></ul></li><li></li></ul>',
            ],
            [
                '<ul><li>First</li><li>second</li><ul><ul><li>sub sub</li></ul></ul></ul>',
                '<ul><li>First</li><li>second<ul><ul><li>sub sub</li></ul></ul></li></ul>',
            ],
            [
                '<ol><ol><ol></ol></ol></ol>',
                '<ol><ol><ol></ol></ol></ol>',
            ],
            [
                '<div><ol><ol><ol></ol></ol></ol></div>',
                '<div><ol><ol><ol></ol></ol></ol></div>',
            ],
        ];

        foreach ($data as $element) {
            \rcube_washtml::fix_broken_lists($element[0]);

            $this->assertSame($element[1], $element[0], 'Broken nested lists (#1488768)');
        }
    }

    /**
     * Test color style handling (#1489697)
     */
    public function test_color_style()
    {
        $html = '<p style="font-size: 10px; color: rgb(241, 245, 218)">a</p>';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertMatchesRegularExpression('|color: rgb\(241, 245, 218\)|', $washed, 'Color style (#1489697)');
        $this->assertMatchesRegularExpression('|font-size: 10px|', $washed, 'Font-size style');
    }

    /**
     * Test handling of unicode chars in style (#1489777)
     */
    public function test_style_unicode()
    {
        $html = "<html><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />
            <body><span style='font-family:\"新細明體\",\"serif\";color:red'>test</span></body></html>";

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertMatchesRegularExpression(
            '|style="font-family: \&quot;新細明體\&quot;,\&quot;serif\&quot;; color: red"|',
            $washed,
            'Unicode chars in style attribute - quoted (#1489697)'
        );

        $html = "<html><meta http-equiv=\"Content-Type\" content=\"text/html; charset=utf-8\" />
            <body><span style='font-family:新細明體;color:red'>test</span></body></html>";

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertMatchesRegularExpression(
            '|style="font-family: 新細明體; color: red"|',
            $washed,
            'Unicode chars in style attribute (#1489697)'
        );
    }

    /**
     * Test deprecated body attributes (#7109)
     */
    public function test_style_body_attrs()
    {
        $html = '<html><meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
            <body bgcolor="#fff" text="#000" background="#test" link="#111" alink="#222" vlink="#333">
            </body></html>';

        $washer = new \rcube_washtml(['html_elements' => ['body']]);
        $washed = $washer->wash($html);

        $this->assertMatchesRegularExpression('|bgcolor="#fff"|', $washed, 'Body bgcolor attribute');
        $this->assertMatchesRegularExpression('|text="#000"|', $washed, 'Body text attribute');
        $this->assertMatchesRegularExpression('|background="#test"|', $washed, 'Body background attribute');
        $this->assertMatchesRegularExpression('|link="#111"|', $washed, 'Body link attribute');
        $this->assertMatchesRegularExpression('|alink="#222"|', $washed, 'Body alink attribute');
        $this->assertMatchesRegularExpression('|vlink="#333"|', $washed, 'Body vlink attribute');
    }

    /**
     * Test style item fixes
     */
    public function test_style_wash()
    {
        $html = '<p style="line-height: 1; height: 10">a</p>';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertMatchesRegularExpression('|line-height: 1;|', $washed, 'Untouched line-height (#1489917)');
        $this->assertMatchesRegularExpression('|; height: 10px|', $washed, 'Fixed height units');

        $html = "<div style=\"padding: 0px\n   20px;border:1px solid #000;\"></div>";
        $expected = '<div style="padding: 0px 20px; border: 1px solid #000"></div>';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertSame($this->cleanupResult($washed), $expected, 'White-space and new-line characters handling');
    }

    /**
     * Test invalid style cleanup - XSS prevention (#1490227)
     */
    public function test_style_wash_xss()
    {
        $html = "<img style=aaa:'\"/onerror=alert(1)//'>";
        $exp = "<img style=\"aaa: '&quot;/onerror=alert(1)//'\" />";

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertTrue(strpos($washed, $exp) !== false, 'Style quotes XSS issue (#1490227)');

        $html = "<img style=aaa:'&quot;/onerror=alert(1)//'>";
        $exp = "<img style=\"aaa: '&quot;/onerror=alert(1)//'\" />";

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertTrue(strpos($washed, $exp) !== false, 'Style quotes XSS issue (#1490227)');
    }

    /**
     * Test handling of title tag
     */
    public function test_title()
    {
        $washer = new \rcube_washtml();

        $html = '<html><head><title>title1</title></head><body><p>test</p></body>';
        $washed = $washer->wash($html);

        $this->assertSame('<p>test</p>', $this->cleanupResult($washed));

        $html = '<html><head><title>title1<img />title2</title></head><body><p>test</p></body>';
        $washed = $washer->wash($html);

        $this->assertSame('<p>test</p>', $this->cleanupResult($washed));
    }

    /**
     * Test SVG cleanup
     */
    public function test_wash_svg()
    {
        $svg = '<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" baseProfile="full" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:cc="http://creativecommons.org/ns#" viewBox="0 0 100 100">
  <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400" onmouseover="alert(1)" />
  <text x="50" y="68" font-size="48" fill="#FFF" text-anchor="middle"><![CDATA[410]]></text>
  <script type="text/javascript">
    alert(document.cookie);
  </script>
  <text x="10" y="25" >An example text</text>
  <a xlink:href="http://www.w.pl"><rect width="100%" height="100%" /></a>
  <foreignObject xlink:href="data:text/xml,%3Cscript xmlns=\'http://www.w3.org/1999/xhtml\'%3Ealert(1)%3C/script%3E"/>
  <set attributeName="onmouseover" to="alert(1)"/>
  <animate attributeName="onunload" to="alert(1)"/>
  <animate attributeName="xlink:href" begin="0" from="javascript:alert(1)" />
</svg>';

        $exp = '<svg xmlns:cc="http://creativecommons.org/ns#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" version="1.1" baseProfile="full" viewBox="0 0 100 100">
  <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400" x-washed="onmouseover" />
  <text x="50" y="68" font-size="48" fill="#FFF" text-anchor="middle">410</text>
  <!-- script not allowed -->
  <text x="10" y="25">An example text</text>
  <a xlink:href="http://www.w.pl"><rect width="100%" height="100%" /></a>
  <!-- foreignobject ignored -->
  <set attributeName="onmouseover" x-washed="to" />
  <animate attributeName="onunload" x-washed="to" />
  <animate attributeName="xlink:href" begin="0" x-washed="from" />
</svg>';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($svg);

        $this->assertSame($washed, $exp, 'SVG content');
    }

    /**
     * Test SVG cleanup
     *
     * @dataProvider provide_wash_svg_tests_cases
     */
    #[DataProvider('provide_wash_svg_tests_cases')]
    public function test_wash_svg_tests($input, $expected)
    {
        $washer = new \rcube_washtml();
        $washed = $washer->wash($input);

        $this->assertSame($expected, $this->cleanupResult($washed), 'SVG content');
    }

    /**
     * Test cases for SVG tests
     */
    public static function provide_wash_svg_tests_cases(): iterable
    {
        $svg1 = "<svg id='x' width='100' height='100'><a xlink:href='javascript:alert(1)'><rect x='0' y='0' width='100' height='100' /></a></svg>";

        return [
            [
                '<head xmlns="&quot;&gt;&lt;script&gt;alert(document.domain)&lt;/script&gt;"><svg></svg></head>',
                '<svg></svg>',
            ],
            [
                '<head xmlns="&quot; onload=&quot;alert(document.domain)">Hello victim!<svg></svg></head>',
                'Hello victim!<svg></svg>',
            ],
            [
                '<p>Hello victim!<svg xmlns="&quot; onload=&quot;alert(document.domain)"></svg></p>',
                '<p>Hello victim!<svg /></p>',
            ],
            [
                '<html><p>Hello victim!<svg xmlns="&quot; onload=&quot;alert(document.domain)"></svg></p>',
                '<p>Hello victim!<svg></svg></p>',
            ],
            [
                '<svg xmlns="&quot; onload=&quot;alert(document.domain)" />',
                '<svg />',
            ],
            [
                '<html><svg xmlns="&quot; onload=&quot;alert(document.domain)" />',
                '<svg></svg>',
            ],
            [
                '<svg><a xlink:href="javascript:alert(1)"><text x="20" y="20">XSS</text></a></svg>',
                '<svg><a x-washed="xlink:href"><text x="20" y="20">XSS</text></a></svg>',
            ],
            [
                '<html><svg><a xlink:href="javascript:alert(1)"><text x="20" y="20">XSS</text></a></svg>',
                '<svg><a x-washed="xlink:href"><text x="20" y="20">XSS</text></a></svg>',
            ],
            [
                '<svg><animate xlink:href="#xss" attributeName="href" values="javascript:alert(1)" />'
                    . '<a id="xss"><text x="20" y="20">XSS</text></a></svg>',
                '<svg><!-- animate blocked --><a id="xss"><text x="20" y="20">XSS</text></a></svg>',
            ],
            [
                '<html><svg><animate xlink:href="#xss" attributeName="href" values="javascript:alert(1)" />'
                    . '<a id="xss"><text x="20" y="20">XSS</text></a></svg>',
                '<svg><!-- animate blocked --><a id="xss"><text x="20" y="20">XSS</text></a></svg>',
            ],
            [
                '<svg><animate xlink:href="#xss" attributeName="href" from="javascript:alert(1)" to="1" />'
                    . '<a id="xss"><text x="20" y="20">XSS</text></a></svg>',
                '<svg><!-- animate blocked --><a id="xss"><text x="20" y="20">XSS</text></a></svg>',
            ],
            [
                '<svg><set xlink:href="#xss" attributeName="href" from="?" to="javascript:alert(1)" />'
                    . '<a id="xss"><text x="20" y="20">XSS</text></a></svg>',
                '<svg><!-- set blocked --><a id="xss"><text x="20" y="20">XSS</text></a></svg>',
            ],
            [
                '<svg><animate xlink:href="#xss" attributename="href" dur="5s" repeatCount="indefinite" keytimes="0;0;1" values="https://portswigger.net?;javascript:alert(1);0" />'
                    . '<a id="xss"><text x="20" y="20">XSS</text></a></svg>',
                '<svg><!-- animate blocked --><a id="xss"><text x="20" y="20">XSS</text></a></svg>',
            ],
            [
                "<svg><use href=\"data:image/svg+xml,&lt;svg id='x' xmlns='http://www.w3.org/2000/svg' "
                    . "xmlns:xlink='http://www.w3.org/1999/xlink' width='100' height='100'&gt;&lt;a xlink:href='javascript:alert(1)'&gt;"
                    . "&lt;rect x='0' y='0' width='100' height='100' /&gt;&lt;/a&gt;&lt;/svg&gt;\"></use></svg>",
                '<svg><use href="data:image/svg+xml;base64,PHN2ZyB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53'
                    . 'My5vcmcvMTk5OS94bGluayIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiBpZD0ie'
                    . 'CIgd2lkdGg9IjEwMCIgaGVpZ2h0PSIxMDAiPjxhIHgtd2FzaGVkPSJ4bGluazpocmVmIj48cmVjdC'
                    . 'B4PSIwIiB5PSIwIiB3aWR0aD0iMTAwIiBoZWlnaHQ9IjEwMCIgLz48L2E+PC9zdmc+" /></svg>',
            ],
            [
                '<svg><use href="data:image/svg+xml;base64,' . base64_encode($svg1) . '"></use></svg>',
                '<svg><use href="data:image/svg+xml;base64,PHN2ZyBpZD0ieCIgd2lkdGg9IjEwMCIgaGVpZ2h'
                    . '0PSIxMDAiPjxhIHgtd2FzaGVkPSJ4bGluazpocmVmIj48cmVjdCB4PSIwIiB5PSIwIiB3aWR0aD0'
                    . 'iMTAwIiBoZWlnaHQ9IjEwMCIgLz48L2E+PC9zdmc+" /></svg>',
            ],
            [
                '<svg><script href="data:text/javascript,alert(1)" /><text x="20" y="20">XSS</text></svg>',
                '<svg><text x="20" y="20">XSS</text></svg>',
            ],
            [
                '<html><svg><use href="data:image/s vg+xml;base64,' // space
                    . 'PHN2ZyBpZD0ieCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4gPGltYWdlIGhy'
                    . 'ZWY9IngiIG9uZXJyb3I9ImFsZXJ0KCcxJykiLz48L3N2Zz4=#x"></svg></html>',
                '<svg><use x-washed="href"></use></svg>',
            ],
            [
                '<html><svg><use href="data:image/s' . "\n" . 'vg+xml;base64,' // new-line
                    . 'PHN2ZyBpZD0ieCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4gPGltYWdlIGhy'
                    . 'ZWY9IngiIG9uZXJyb3I9ImFsZXJ0KCcxJykiLz48L3N2Zz4=#x"></svg></html>',
                '<svg><use x-washed="href"></use></svg>',
            ],
            [
                '<html><svg><use href="data:image/s	vg+xml;base64,' // tab
                    . 'PHN2ZyBpZD0ieCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4gPGltYWdlIGhy'
                    . 'ZWY9IngiIG9uZXJyb3I9ImFsZXJ0KCcxJykiLz48L3N2Zz4=#x"></svg></html>',
                '<svg><use x-washed="href"></use></svg>',
            ],
            [
                '<html><svg><animate attributeName="href " values="javascript:alert(\'XSS\')" href="#link" /></animate></svg></html>',
                '<svg><!-- animate blocked --></svg>',
            ],
        ];
    }

    /**
     * Test various XSS issues
     *
     * @dataProvider provide_wash_xss_tests_cases
     */
    #[DataProvider('provide_wash_xss_tests_cases')]
    public function test_wash_xss_tests($input, $expected)
    {
        $washer = new \rcube_washtml(['allow_remote' => true, 'html_elements' => ['body']]);
        $washed = $washer->wash($input);

        $this->assertSame($expected, $this->cleanupResult($washed), 'XSS issues');
    }

    /**
     * Test cases for various XSS issues
     */
    public static function provide_wash_xss_tests_cases(): iterable
    {
        return [
            [
                '<html><base href="javascript:/a/-alert(1)///////"><a href="../lol/safari.html">test</a>',
                '<body><a x-washed="href">test</a></body>',
            ],
            [
                '<html><math><x href="javascript:alert(1)">blah</x>',
                '<body><math>blah</math></body>',
            ],
            [
                '<html><a href="j&#x61vascript:alert(1)">XSS</a>',
                '<body><a x-washed="href">XSS</a></body>',
            ],
            [
                '<html><a href="&#x6a avascript:alert(1)">XSS</a>',
                '<body><a x-washed="href">XSS</a></body>',
            ],
            [
                '<html><a href="&#x6a avascript:alert(1)">XSS</a>',
                '<body><a x-washed="href">XSS</a></body>',
            ],
            [
                '<html><body background="javascript:alert(1)">',
                '<body x-washed="background"></body>',
            ],
            [
                '<html><body><img fill=\'asd:url(#asd)" src="x" onerror="alert(1)\' />',
                '<body><img fill="asd:url(#asd)&quot; src=&quot;x&quot; onerror=&quot;alert(1)" /></body>',
            ],
            [
                '<html><math href="javascript:alert(location);"><mi>clickme</mi></math>',
                '<body><math x-washed="href"><mi>clickme</mi></math></body>',
            ],
            [
                '<html><math><mstyle href="javascript:alert(location);"><mi>clickme</mi></mstyle></math>',
                '<body><math><mstyle x-washed="href"><mi>clickme</mi></mstyle></math></body>',
            ],
            [
                '<html><math><msubsup href="javascript:alert(location);"><mi>clickme</mi></msubsup></math>',
                '<body><math><msubsup x-washed="href"><mi>clickme</mi></msubsup></math></body>',
            ],
            [
                '<html><math><ms HREF="javascript:alert(location);">clickme</ms></math>',
                '<body><math><ms x-washed="href">clickme</ms></math></body>',
            ],
        ];
    }

    /**
     * Test position:fixed cleanup - (#5264)
     */
    public function test_style_wash_position_fixed()
    {
        $html = "<img style='position:fixed' /><img style=\"position:/**/ fixed; top:10px\" />";
        $exp = '<img style="position: absolute" /><img style="position: absolute; top: 10px" />';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertTrue(strpos($washed, $exp) !== false, 'Position:fixed (#5264)');
    }

    /**
     * Test MathML cleanup
     */
    public function test_wash_mathml()
    {
        $mathml = '<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body>
            <math><semantics>
                <mrow>
                    <msub><mi>I</mi><mi>D</mi></msub>
                    <mo>=</mo>
                    <mfrac><mn>1</mn><mn>2</mn></mfrac>
                    <msub><mi>k</mi><mi>n</mi></msub>
                    <mfrac><mi>W</mi><mi>L</mi></mfrac>
                    <mo stretchy="false">(</mo>
                    <msub><mi>V</mi><mrow><mi>G</mi><mi>S</mi></mrow></msub>
                    <mo>-</mo><msub><mi>V</mi><mi>t</mi></msub><msup>
                    <mo stretchy="false">)</mo><mn>2</mn></msup>
                </mrow>
                <annotation encoding="TeX">I_D = \frac{1}{2} k_n \frac{W}{L} (V_{GS}-V_t)^2</annotation>
            </semantics></math>
            </body></html>';

        $exp = '<!-- html ignored --><!-- head ignored --><!-- meta ignored --><!-- body ignored -->
            <math><semantics>
                <mrow>
                    <msub><mi>I</mi><mi>D</mi></msub>
                    <mo>=</mo>
                    <mfrac><mn>1</mn><mn>2</mn></mfrac>
                    <msub><mi>k</mi><mi>n</mi></msub>
                    <mfrac><mi>W</mi><mi>L</mi></mfrac>
                    <mo stretchy="false">(</mo>
                    <msub><mi>V</mi><mrow><mi>G</mi><mi>S</mi></mrow></msub>
                    <mo>-</mo><msub><mi>V</mi><mi>t</mi></msub><msup>
                    <mo stretchy="false">)</mo><mn>2</mn></msup>
                </mrow>
                <annotation encoding="TeX">I_D = \frac{1}{2} k_n \frac{W}{L} (V_{GS}-V_t)^2</annotation>
            </semantics></math>';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($mathml);

        // remove whitespace between tags
        $washed = preg_replace('/>[\s\r\n\t]+</', '><', $washed);
        $exp = preg_replace('/>[\s\r\n\t]+</', '><', $exp);

        $this->assertSame(trim($washed), trim($exp), 'MathML content');
    }

    /**
     * Test external links in src of input/video elements (#5583)
     */
    public function test_src_wash()
    {
        $html = '<input type="image" src="http://TRACKING_URL/">';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertTrue($washer->extlinks);
        $this->assertStringNotContainsString('TRACKING', $washed, 'Src attribute of <input> tag (#5583)');

        $html = '<video src="http://TRACKING_URL/">';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertTrue($washer->extlinks);
        $this->assertStringNotContainsString('TRACKING', $washed, 'Src attribute of <video> tag (#5583)');
    }

    /**
     * Test external links
     */
    public function test_extlinks()
    {
        $html = [
            ['<link href="http://TRACKING_URL/">', true],
            ['<link href="src:abc">', false],
            ['<img src="http://TRACKING_URL/">', true],
            ['<img src="data:image">', false],
            ['<p style="backgr\ound-image: \ur\l(\'http://TRACKING_URL\')"></p>', true],
        ];

        foreach ($html as $item) {
            $washer = new \rcube_washtml();
            $washed = $washer->wash($item[0]);

            $this->assertSame($item[1], $washer->extlinks);
        }

        foreach ($html as $item) {
            $washer = new \rcube_washtml(['allow_remote' => true]);
            $washed = $washer->wash($item[0]);

            $this->assertFalse($washer->extlinks);
        }
    }

    public function test_textarea_content_escaping()
    {
        $html = '<textarea><p style="x:</textarea><img src=x onerror=alert(1)>">';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertStringNotContainsString('onerror=alert(1)>', $washed);
        $this->assertStringContainsString('&lt;p style=&quot;x:', $washed);
    }

    /**
     * Test css_prefix feature
     */
    public function test_css_prefix()
    {
        $washer = new \rcube_washtml(['css_prefix' => 'test']);

        $html = '<p id="my-id">'
            . '<label for="my-other-id" class="my-class1 my-class2">test</label>'
            . '<a href="#my-id">link</a>'
            . '</p>';
        $washed = $washer->wash($html);

        $this->assertStringContainsString('id="testmy-id"', $washed);
        $this->assertStringContainsString('for="testmy-other-id"', $washed);
        $this->assertStringContainsString('href="#testmy-id"', $washed);
        $this->assertStringContainsString('class="testmy-class1 testmy-class2"', $washed);

        // Make sure the anchor name is prefixed too
        $html = '<p><a href="#a">test link</a></p><a name="a">test anchor</a>';
        $washed = $washer->wash($html);

        $this->assertStringContainsString('href="#testa"', $washed);
        $this->assertStringContainsString('name="testa"', $washed);
    }

    /**
     * Test removing xml tag
     */
    public function test_xml_tag()
    {
        $html = '<p><?xml:namespace prefix = "xsl" /></p>';

        $washer = new \rcube_washtml();
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame($washed, '<p></p>');

        $html = '<?xml encoding="UTF-8"><html><body>HTML</body></html>';

        $washer = new \rcube_washtml();
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame($washed, 'HTML');
    }

    /**
     * Test missing main HTML hierarchy tags (#6713)
     */
    public function test_missing_tags()
    {
        $washer = new \rcube_washtml();

        $html = '<head></head>First line<br />Second line';
        $washed = $washer->wash($html);

        $this->assertStringContainsString('First line', $washed);

        $html = 'First line<br />Second line';
        $washed = $washer->wash($html);

        $this->assertStringContainsString('First line', $washed);

        $html = '<html>First line<br />Second line</html>';
        $washed = $washer->wash($html);

        $this->assertStringContainsString('>First line', $washed);

        $html = '<html><head></head>First line<br />Second line</html>';
        $washed = $washer->wash($html);

        $this->assertStringContainsString('First line', $washed);

        // Not really valid HTML, but because its common in email world
        // and because it works with DOMDocument, we make sure its supported
        $html = 'First line<br /><html><body>Second line';
        $washed = $washer->wash($html);

        $this->assertStringContainsString('First line', $washed);

        $html = 'First line<br /><html>Second line';
        $washed = $washer->wash($html);

        $this->assertStringContainsString('First line', $washed);
    }

    /**
     * Test CDATA cleanup
     */
    public function test_cdata()
    {
        $html = '<p><![CDATA[<script>alert(document.cookie)</script>]]></p>';

        $washer = new \rcube_washtml();
        $washed = $washer->wash($html);

        $this->assertTrue(strpos($washed, '<script>') === false, 'CDATA content');
    }

    /**
     * Test URI base resolving in HTML messages
     */
    public function test_resolve_base()
    {
        $html = file_get_contents(TESTS_DIR . 'src/htmlbase.txt');
        $html = \rcube_washtml::resolve_base($html);

        $this->assertMatchesRegularExpression('|src="http://alec\.pl/dir/img1\.gif"|', $html, 'URI base resolving [1]');
        $this->assertMatchesRegularExpression('|src="http://alec\.pl/dir/img2\.gif"|', $html, 'URI base resolving [2]');
        $this->assertMatchesRegularExpression('|src="http://alec\.pl/img3\.gif"|', $html, 'URI base resolving [3]');

        // base resolving exceptions
        $this->assertMatchesRegularExpression('|src="cid:theCID"|', $html, 'URI base resolving exception [1]');
        $this->assertMatchesRegularExpression('|src="http://other\.domain\.tld/img3\.gif"|', $html, 'URI base resolving exception [2]');
    }

    /**
     * Test workaround for HTML5 bug (#7356)
     */
    public function test_table_bug7356()
    {
        $html = '
<table id="t1">
  <tr>
    <td>
      <table id="t2">
        <tr>
        <tr>
          <td></td>
        </tr>
        </tr>
      </table>
    </td>
  </tr>
  <tr><td></td></tr>
</table>';

        $expected = '<table id="t1"><tr><td><table id="t2"><tr><td></td></tr></table></td></tr><tr><td></td></tr></table>';

        if (class_exists('Dom\HTMLDocument')) {
            $expected = '<table id="t1"><tbody><tr><td><table id="t2"><tbody><tr></tr><tr><td></td></tr></tbody></table></td></tr><tr><td></td></tr></tbody></table>';
        }

        $washer = new \rcube_washtml();
        $washed = $this->cleanupResult($washer->wash($html));

        $this->assertSame($expected, preg_replace('/>[^<>]+</', '><', $washed));
    }
}
