1 files changed, 97 insertions, 0 deletions
diff --git a/vendor/mikespub/php-epub-meta/src/Tools/HtmlTools.php b/vendor/mikespub/php-epub-meta/src/Tools/HtmlTools.php
new file mode 100644
index 000000000..f905d265a
--- /dev/null
+++ b/vendor/mikespub/php-epub-meta/src/Tools/HtmlTools.php
@@ -0,0 +1,97 @@
+<?php
+
+namespace SebLucas\EPubMeta\Tools;
+
+/**
+ * From Epubli\Common\Tools - see https://github.com/epubli/common
+ * @author Epubli Developers <devs@epubli.com>
+ */
+class HtmlTools
+{
+    /**
+     * @param string $html
+     * @return string
+     */
+    public static function convertEntitiesNamedToNumeric($html)
+    {
+        return strtr($html, include(__DIR__ . '/htmlEntityMap.php'));
+    }
+
+    /**
+     * @param string $name
+     * @return bool
+     */
+    public static function isBlockLevelElement($name)
+    {
+        return in_array($name, include(__DIR__ . '/htmlBlockLevelElements.php'));
+    }
+
+    /**
+     * performs a tag-aware truncation of (html-) strings, preserving tag integrity
+     * @param array<string>|string $html
+     * @param int|string $length
+     * @return bool|string
+     */
+    public static function truncate($html, $length = "20%")
+    {
+        $htmls = is_array($html) ? $html : [$html];
+        foreach ($htmls as &$htmlString) {
+            if (is_string($length)) {
+                $length = trim($length);
+                /* interpret percentage value */
+                if (substr($length, -1) == '%') {
+                    $length = (int) (strlen($htmlString) * intval(substr($length, 0, -1)) / 100);
+                }
+            }
+            $htmlString = substr($htmlString, 0, $length);
+            /* eliminate trailing truncated tag fragment if present */
+            $htmlString = preg_replace('/<[^>]*$/is', '', $htmlString);
+        }
+
+        return is_array($html) ? $htmls : array_pop($htmls);
+    }
+
+    /**
+     * strips all occurring html tags from $html (which can either be a string or an array of strings),
+     * preserving all content enclosed by all tags in $keep and
+     * dumping the content residing in all tags listed in $drop
+     * @param array<string>|string $html
+     * @param array<string> $keep
+     * @param array<string> $drop
+     * @return array<string>|string
+     */
+    public static function stripHtmlTags(
+        $html,
+        $keep =
+        ['title', 'br', 'p', 'h1','h2','h3','h4','h5','span','div','i','strong','b', 'table', 'td', 'th', 'tr'],
+        $drop =
+        ['head','style']
+    ) {
+        $htmls = is_array($html) ? $html : [$html];
+        foreach ($htmls as &$htmlString) {
+            foreach ($drop as $dumpTag) {
+                $htmlString = preg_replace("/<$dumpTag.*$dumpTag>/is", "\n", $htmlString);
+            }
+            $htmlString = preg_replace("/[\n\r ]{2,}/i", "\n", $htmlString);
+            $htmlString = preg_replace("/[\n|\r]/i", '<br />', $htmlString);
+
+            /* @TODO: remove style tags and only keep body content (drop head) */
+            $tempFunc = function ($matches) use ($keep) {
+                $htmlNode = "<" . $matches[1] . ">" . strip_tags($matches[2]) . "</" . $matches[1] . ">";
+                if (in_array($matches[1], $keep)) {
+                    return " " . $htmlNode . " ";
+                } else {
+                    return "";
+                }
+            };
+
+            $allowedTags = implode("|", array_values($keep));
+            $regExp = '@<(' . $allowedTags . ')[^>]*?>(.*?)<\/\1>@i';
+            $htmlString = preg_replace_callback($regExp, $tempFunc, $htmlString);
+
+            $htmlString = strip_tags($htmlString, "<" . implode("><", $keep) . ">");
+        }
+        /* preserve injected variable cast type (string|array) when returning processed entity */
+        return is_array($html) ? $htmls : array_pop($htmls);
+    }
+}