Add Delay for Reddit support

Adds support for delayforreddit.com non-direct links.

bdfr/site_downloaders/delay_for_reddit.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python3
+
+import logging
+from typing import Optional
+
+from praw.models import Submission
+
+from bdfr.site_authenticator import SiteAuthenticator
+from bdfr.resource import Resource
+from bdfr.site_downloaders.base_downloader import BaseDownloader
+
+logger = logging.getLogger(__name__)
+
+
+class DelayForReddit(BaseDownloader):
+    def __init__(self, post: Submission):
+        super().__init__(post)
+
+    def find_resources(self, authenticator: Optional[SiteAuthenticator] = None) -> list[Resource]:
+        media = DelayForReddit.retrieve_url(self.post.url)
+        return [Resource(self.post, media.url, Resource.retry_download(media.url))]

bdfr/site_downloaders/download_factory.py

@@ -7,6 +7,7 @@ from typing import Type
 
 from bdfr.exceptions import NotADownloadableLinkError
 from bdfr.site_downloaders.base_downloader import BaseDownloader
+from bdfr.site_downloaders.delay_for_reddit import DelayForReddit
 from bdfr.site_downloaders.direct import Direct
 from bdfr.site_downloaders.erome import Erome
 from bdfr.site_downloaders.fallback_downloaders.ytdlp_fallback import YtdlpFallback
@@ -34,6 +35,8 @@ class DownloadFactory:
             return Direct
         elif re.match(r'erome\.com.*', sanitised_url):
             return Erome
+        elif re.match(r'delayforreddit\.com', sanitised_url):
+            return DelayForReddit
         elif re.match(r'reddit\.com/gallery/.*', sanitised_url):
             return Gallery
         elif re.match(r'patreon\.com.*', sanitised_url):

tests/site_downloaders/test_delay_for_reddit.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+# coding=utf-8
+
+from unittest.mock import Mock
+
+import pytest
+
+from bdfr.resource import Resource
+from bdfr.site_downloaders.delay_for_reddit import DelayForReddit
+
+
+@pytest.mark.online
+@pytest.mark.parametrize(('test_url', 'expected_hash'), (
+    ('https://www.delayforreddit.com/dfr/calvin6123/MjU1Njc5NQ==', '3300f28c2f9358d05667985c9c04210d'),
+    ('https://www.delayforreddit.com/dfr/RoXs_26/NDAwMzAyOQ==', '09b7b01719dff45ab197bdc08b90f78a'),
+))
+def test_download_resource(test_url: str, expected_hash: str):
+    mock_submission = Mock()
+    mock_submission.url = test_url
+    test_site = DelayForReddit(mock_submission)
+    resources = test_site.find_resources()
+    assert len(resources) == 1
+    assert isinstance(resources[0], Resource)
+    resources[0].download()
+    assert resources[0].hash.hexdigest() == expected_hash