Add markdown util.

aiogram/utils/markdown.py

@@ -0,0 +1,37 @@
+MD_SYMBOLS = '*_`'
+
+
+def _rst(symbol, *content, sep=' '):
+    start, end = (symbol, symbol) if isinstance(symbol, str) else (symbol[0], symbol[1])
+    return start + sep.join(map(str, content)) + end
+
+
+def text(*content, sep=' '):
+    return _rst('', *content, sep=sep)
+
+
+def bold(*content, sep=' '):
+    return _rst(MD_SYMBOLS[0], *content, sep=sep)
+
+
+def italic(*content, sep=' '):
+    return _rst(MD_SYMBOLS[1], *content, sep=sep)
+
+
+def code(*content, sep=' '):
+    return _rst(MD_SYMBOLS[2], *content, sep=sep)
+
+
+def pre(*content, sep='\n'):
+    return _rst(('```\n', '\n```'), *content, sep=sep)
+
+
+def link(title, url):
+    return f"[{title}]({url})"
+
+
+def escape_md(*content, sep=' '):
+    result = text(*content, sep=sep)
+    for symbol in MD_SYMBOLS + '[':
+        result = result.replace(symbol, '\\' + symbol)
+    return result