Adding reddit url functions

ural/reddit.py

@@ -0,0 +1,39 @@
+import re
+
+from ural.patterns import DOMAIN_TEMPLATE
+from ural.utils import SplitResult
+from ural import get_domain_name, urlpathsplit
+
+
+REDDIT_DOMAIN_RE = re.compile(r"(?:reddit\.[^.]+$|redd\.it$)", re.I)
+REDDIT_URL_RE = re.compile(DOMAIN_TEMPLATE % r"(?:[^.]+\.)*(?:reddit\.[^.]+|redd\.it)", re.I)
+
+
+def is_reddit_url(url):
+    if isinstance(url, SplitResult):
+        return bool(re.search(REDDIT_DOMAIN_RE, url.hostname))
+
+    return bool(re.match(REDDIT_URL_RE, url))
+
+
+def is_reddit_post_url(url):
+    if not is_reddit_url(url):
+        return False
+
+    return (
+        '/r/' in url and '/comments/' in url
+    )
+
+
+def convert_reddit_url_to_old_url(url):
+    domain = get_domain_name(url)
+    path = urlpathsplit(url)
+    return f"https://old.{domain}/" + "/".join(path) + "/"
+
+
+def convert_old_reddit_url_to_new_url(url):
+    domain = get_domain_name(url)
+    path = urlpathsplit(url)
+    return f"https://www.{domain}/" + "/".join(path) + "/"
+
+

ural/reddit.pyi

@@ -0,0 +1,7 @@
+from typing import Optional
+from ural.types import AnyUrlTarget
+
+def is_reddit_url(url: str) -> bool : ...
+def is_reddit_post_url(url: str) -> bool : ...
+def convert_reddit_url_to_old_url(url: str) -> bool : ...
+def convert_old_reddit_url_to_new_url(url: str) -> bool : ...