[FEATURE] Add

src/ytdl_sub/config/preset_options.py

@@ -19,6 +19,7 @@ from ytdl_sub.validators.string_formatter_validators import DictFormatterValidat
 from ytdl_sub.validators.string_formatter_validators import OverridesStringFormatterValidator
 from ytdl_sub.validators.string_formatter_validators import StringFormatterValidator
 from ytdl_sub.validators.validators import BoolValidator
+from ytdl_sub.validators.validators import IntValidator
 from ytdl_sub.validators.validators import LiteralDictValidator
 from ytdl_sub.validators.validators import Validator
 
@@ -253,6 +254,7 @@ class OutputOptions(StrictDictValidator):
         "maintain_download_archive",
         "keep_files_before",
         "keep_files_after",
+        "keep_max_files",
     }
 
     @classmethod
@@ -307,6 +309,7 @@ class OutputOptions(StrictDictValidator):
         self._keep_files_after = self._validate_key_if_present(
             "keep_files_after", StringDatetimeValidator
         )
+        self._keep_max_files = self._validate_key_if_present("keep_max_files", IntValidator)
 
         if (
             self._keep_files_before or self._keep_files_after
@@ -387,7 +390,8 @@ class OutputOptions(StrictDictValidator):
         Optional. Requires ``maintain_download_archive`` set to True.
 
         Only keeps files that are uploaded before this datetime. By default, ytdl-sub will keep
-        files before ``now``, which implies all files.
+        files before ``now``, which implies all files. Can be used in conjunction with
+        ``keep_max_files``.
         """
         return self._keep_files_before
 
@@ -397,6 +401,19 @@ class OutputOptions(StrictDictValidator):
         Optional. Requires ``maintain_download_archive`` set to True.
 
         Only keeps files that are uploaded after this datetime. By default, ytdl-sub will keep
-        files after ``19000101``, which implies all files.
+        files after ``19000101``, which implies all files. Can be used in conjunction with
+        ``keep_max_files``.
         """
         return self._keep_files_after
+
+    @property
+    def keep_max_files(self) -> Optional[int]:
+        """
+        Optional. Requires ``maintain_download_archive`` set to True.
+
+        Only keeps N most recently uploaded videos. Can be used in conjunction with
+        ``keep_files_before`` and ``keep_files_after``.
+        """
+        if self._keep_max_files:
+            return self._keep_max_files.value
+        return None

src/ytdl_sub/subscriptions/subscription_download.py

@@ -145,8 +145,10 @@ class SubscriptionDownload(BaseSubscription, ABC):
                 after=self.output_options.keep_files_after,
                 overrides=self.overrides,
             )
-            if date_range_to_keep:
+            if date_range_to_keep or self.output_options.keep_max_files is not None:
-                self._enhanced_download_archive.remove_stale_files(date_range=date_range_to_keep)
+                self._enhanced_download_archive.remove_stale_files(
+                    date_range=date_range_to_keep, keep_max_files=self.output_options.keep_max_files
+                )
 
             self._enhanced_download_archive.save_download_mappings()
             FileHandler.delete(self._enhanced_download_archive.working_file_path)

src/ytdl_sub/ytdl_additions/enhanced_download_archive.py

@@ -537,7 +537,16 @@ class EnhancedDownloadArchive:
 
         return self
 
-    def remove_stale_files(self, date_range: DateRange) -> "EnhancedDownloadArchive":
+    def _remove_entry(self, uid: str, mapping: DownloadMapping) -> None:
+        for file_name in mapping.file_names:
+            self._file_handler.delete_file_from_output_directory(file_name=file_name)
+
+        self.mapping.remove_entry(entry_id=uid)
+        self.num_entries_removed += 1
+
+    def remove_stale_files(
+        self, date_range: Optional[DateRange], keep_max_files: Optional[int]
+    ) -> "EnhancedDownloadArchive":
         """
         Checks all entries within the mappings. If any entries' upload dates are not within the
         provided date range, delete them.
@@ -545,22 +554,32 @@ class EnhancedDownloadArchive:
         Parameters
         ----------
         date_range
-            Date range the upload date must be in to not get deleted
+            Optional. Date range the upload date must be in to not get deleted
+        keep_max_files
+            Optional. Max number of files to keep
 
         Returns
         -------
         self
         """
+        if date_range is not None:
             stale_mappings: Dict[str, DownloadMapping] = self.mapping.get_entries_out_of_range(
                 date_range=date_range
             )
 
             for uid, mapping in stale_mappings.items():
-            for file_name in mapping.file_names:
+                self._remove_entry(uid=uid, mapping=mapping)
-                self._file_handler.delete_file_from_output_directory(file_name=file_name)
 
-            self.mapping.remove_entry(entry_id=uid)
+        if keep_max_files is not None:
-            self.num_entries_removed += 1
+            num_files = 0
+            for uid, mapping in sorted(
+                self.mapping.entry_mappings.items(),
+                key=lambda kv_: kv_[1].upload_date,
+                reverse=True,
+            ):
+                num_files += 1
+                if num_files > keep_max_files:
+                    self._remove_entry(uid=uid, mapping=mapping)
 
         return self
 

tests/e2e/youtube/test_channel.py

@@ -77,6 +77,28 @@ class TestChannel:
         channel_preset_dict: Dict,
     ):
         subscription_name = "pz"
+        tv_show_name = channel_preset_dict["overrides"]["tv_show_name"]
+        archive_file_name = f".ytdl-sub-{subscription_name}-download-archive.json"
+
+        pz_channel_mock_downloaded_with_archive_factory(
+            tv_show_name=tv_show_name, archive_file_name=archive_file_name
+        )
+
+        full_channel_subscription = Subscription.from_dict(
+            config=tv_show_config, preset_name=subscription_name, preset_dict=channel_preset_dict
+        )
+        transaction_log = full_channel_subscription.download(dry_run=True)
+        assert transaction_log.is_empty
+
+    def test_full_channel_existing_archive_keep_max_files(
+        self,
+        pz_channel_mock_downloaded_with_archive_factory: Callable,
+        tv_show_config: ConfigFile,
+        channel_preset_dict: Dict,
+        output_directory: str,
+    ):
+        subscription_name = "pz"
+        channel_preset_dict = dict(channel_preset_dict, **{"output_options": {"keep_max_files": 1}})
         full_channel_subscription = Subscription.from_dict(
             config=tv_show_config, preset_name=subscription_name, preset_dict=channel_preset_dict
         )
@@ -86,5 +108,10 @@ class TestChannel:
         pz_channel_mock_downloaded_with_archive_factory(
             tv_show_name=tv_show_name, archive_file_name=archive_file_name
         )
+
         transaction_log = full_channel_subscription.download(dry_run=True)
-        assert transaction_log.is_empty
+        assert_transaction_log_matches(
+            output_directory=output_directory,
+            transaction_log=transaction_log,
+            transaction_log_summary_file_name="youtube/test_channel_full_keep_max_files.txt",
+        )

tests/resources/transaction_log_summaries/youtube/test_channel_full_keep_max_files.txt

@@ -0,0 +1,56 @@
+Files modified:
+----------------------------------------
+{output_directory}
+  .ytdl-sub-pz-download-archive.json
+
+Files removed:
+----------------------------------------
+{output_directory}/Season 2010
+  s2010.e081301 - Oblivion Mod ＂Falcor＂ p.1-thumb.jpg
+  s2010.e081301 - Oblivion Mod ＂Falcor＂ p.1.info.json
+  s2010.e081301 - Oblivion Mod ＂Falcor＂ p.1.mp4
+  s2010.e081301 - Oblivion Mod ＂Falcor＂ p.1.nfo
+  s2010.e120201 - Oblivion Mod ＂Falcor＂ p.2-thumb.jpg
+  s2010.e120201 - Oblivion Mod ＂Falcor＂ p.2.info.json
+  s2010.e120201 - Oblivion Mod ＂Falcor＂ p.2.mp4
+  s2010.e120201 - Oblivion Mod ＂Falcor＂ p.2.nfo
+{output_directory}/Season 2011
+  s2011.e020101 - Jesse's Minecraft Server [Trailer - Feb.1]-thumb.jpg
+  s2011.e020101 - Jesse's Minecraft Server [Trailer - Feb.1].info.json
+  s2011.e020101 - Jesse's Minecraft Server [Trailer - Feb.1].mp4
+  s2011.e020101 - Jesse's Minecraft Server [Trailer - Feb.1].nfo
+  s2011.e022701 - Jesse's Minecraft Server [Trailer - Feb.27]-thumb.jpg
+  s2011.e022701 - Jesse's Minecraft Server [Trailer - Feb.27].info.json
+  s2011.e022701 - Jesse's Minecraft Server [Trailer - Feb.27].mp4
+  s2011.e022701 - Jesse's Minecraft Server [Trailer - Feb.27].nfo
+  s2011.e032101 - Jesse's Minecraft Server [Trailer - Mar.21]-thumb.jpg
+  s2011.e032101 - Jesse's Minecraft Server [Trailer - Mar.21].info.json
+  s2011.e032101 - Jesse's Minecraft Server [Trailer - Mar.21].mp4
+  s2011.e032101 - Jesse's Minecraft Server [Trailer - Mar.21].nfo
+  s2011.e052901 - Project Zombie ｜Official Trailer｜ (IP： mc.projectzombie.beastnode.net)-thumb.jpg
+  s2011.e052901 - Project Zombie ｜Official Trailer｜ (IP： mc.projectzombie.beastnode.net).info.json
+  s2011.e052901 - Project Zombie ｜Official Trailer｜ (IP： mc.projectzombie.beastnode.net).mp4
+  s2011.e052901 - Project Zombie ｜Official Trailer｜ (IP： mc.projectzombie.beastnode.net).nfo
+  s2011.e063001 - Project Zombie ｜Fin｜-thumb.jpg
+  s2011.e063001 - Project Zombie ｜Fin｜.info.json
+  s2011.e063001 - Project Zombie ｜Fin｜.mp4
+  s2011.e063001 - Project Zombie ｜Fin｜.nfo
+  s2011.e112101 - Skyrim 'Ultra HD w⧸Mods' [PC]-thumb.jpg
+  s2011.e112101 - Skyrim 'Ultra HD w⧸Mods' [PC].info.json
+  s2011.e112101 - Skyrim 'Ultra HD w⧸Mods' [PC].mp4
+  s2011.e112101 - Skyrim 'Ultra HD w⧸Mods' [PC].nfo
+{output_directory}/Season 2012
+  s2012.e012301 - Project Zombie ｜Map Trailer｜-thumb.jpg
+  s2012.e012301 - Project Zombie ｜Map Trailer｜.info.json
+  s2012.e012301 - Project Zombie ｜Map Trailer｜.mp4
+  s2012.e012301 - Project Zombie ｜Map Trailer｜.nfo
+{output_directory}/Season 2013
+  s2013.e071901 - Project Zombie Rewind ｜Trailer｜-thumb.jpg
+  s2013.e071901 - Project Zombie Rewind ｜Trailer｜.info.json
+  s2013.e071901 - Project Zombie Rewind ｜Trailer｜.mp4
+  s2013.e071901 - Project Zombie Rewind ｜Trailer｜.nfo
+{output_directory}/Season 2018
+  s2018.e102901 - Jesse's Minecraft Server ｜ Teaser Trailer-thumb.jpg
+  s2018.e102901 - Jesse's Minecraft Server ｜ Teaser Trailer.info.json
+  s2018.e102901 - Jesse's Minecraft Server ｜ Teaser Trailer.mp4
+  s2018.e102901 - Jesse's Minecraft Server ｜ Teaser Trailer.nfo