Build regex programmatically

src/regex.js

@@ -1 +1,18 @@
-export default /(([^\s,]*\.(com|ninja))|(?:[0-9]{1,3}\.){3}[0-9]{1,3})(:[0-9]+)?(\/([^\s,.]*)?)?(?=[\s,.]|$)/g;
+// Reusables
+const escapeChar = `\\`;
+const notWhitespaceOrComma = `[^${escapeChar}s,]`;
+const notWhitespaceCommaOrDot = `[^${escapeChar}s,.]`;
+const WhitespaceCommaDotOrEndOfLine = `[${escapeChar}s,.]|$`;
+const number = `[0-9]`;
+
+// Sections
+const hostname = `(${notWhitespaceOrComma}*${escapeChar}.(com|ninja))`;
+const ip = `(${number}{1,3}${escapeChar}.){3}${number}{1,3}`;
+const optionalPortNumber = `(:${number}+)?`;
+const optionalSlash = `(${escapeChar}/(${notWhitespaceCommaOrDot}*)?)?`;
+const endsWithButDontMatch = `(?=${WhitespaceCommaDotOrEndOfLine})`;
+
+// Build
+const regex = `(${hostname}|${ip})${optionalPortNumber}${optionalSlash}${endsWithButDontMatch}`;
+
+export default new RegExp(regex, 'gi');