Replace Mardownify library with html-to-markdown library.

1 files changed, 124 insertions, 0 deletions

diff --git a/vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php b/vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php
new file mode 100644
index 000000000..cf852bfcf
--- /dev/null
+++ b/vendor/league/html-to-markdown/src/Converter/ParagraphConverter.php
@@ -0,0 +1,124 @@
+<?php
+
+namespace League\HTMLToMarkdown\Converter;
+
+use League\HTMLToMarkdown\ElementInterface;
+
+class ParagraphConverter implements ConverterInterface
+{
+    /**
+     * @param ElementInterface $element
+     *
+     * @return string
+     */
+    public function convert(ElementInterface $element)
+    {
+        $value = $element->getValue();
+
+        $markdown = '';
+
+        $lines = preg_split('/\r\n|\r|\n/', $value);
+        foreach ($lines as $line) {
+            /*
+             * Some special characters need to be escaped based on the position that they appear
+             * The following function will deal with those special cases.
+             */
+            $markdown .= $this->escapeSpecialCharacters($line);
+            $markdown .= "\n";
+        }
+
+        return trim($markdown) !== '' ? rtrim($markdown) . "\n\n" : '';
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getSupportedTags()
+    {
+        return array('p');
+    }
+
+    /**
+     * @param string $line
+     *
+     * @return string
+     */
+    private function escapeSpecialCharacters($line)
+    {
+        $line = $this->escapeFirstCharacters($line);
+        $line = $this->escapeOtherCharacters($line);
+        $line = $this->escapeOtherCharactersRegex($line);
+
+        return $line;
+    }
+
+    /**
+     * @param string $line
+     *
+     * @return string
+     */
+    private function escapeFirstCharacters($line)
+    {
+        $escapable = array(
+            '>',
+            '- ',
+            '+ ',
+            '--',
+            '~~~',
+            '---',
+            '- - -'
+        );
+
+        foreach ($escapable as $i) {
+            if (strpos(ltrim($line), $i) === 0) {
+                // Found a character that must be escaped, adding a backslash before
+                return '\\' . ltrim($line);
+            }
+        }
+
+        return $line;
+    }
+
+    /**
+     * @param string $line
+     *
+     * @return string
+     */
+    private function escapeOtherCharacters($line)
+    {
+        $escapable = array(
+            '<!--'
+        );
+
+        foreach ($escapable as $i) {
+            if (strpos($line, $i) !== false) {
+                // Found an escapable character, escaping it
+                $line = substr_replace($line, '\\', strpos($line, $i), 0);
+            }
+        }
+
+        return $line;
+    }
+
+    /**
+     * @param string $line
+     *
+     * @return string
+     */
+    private function escapeOtherCharactersRegex($line)
+    {
+        $regExs = array(
+            // Match numbers ending on ')' or '.' that are at the beginning of the line.
+            '/^[0-9]+(?=\)|\.)/'
+        );
+
+        foreach ($regExs as $i) {
+            if (preg_match($i, $line, $match)) {
+                // Matched an escapable character, adding a backslash on the string before the offending character
+                $line = substr_replace($line, '\\', strlen($match[0]), 0);
+            }
+        }
+
+        return $line;
+    }
+}