[FEATURE] Add ytdl-sub view URL to view source variables (#340)

* [FEATURE] Add `ytdl-sub view URL` to view source variables

* update file path

.gitignore

@@ -142,3 +142,5 @@ dmypy.json
 docker/*.whl
 docker/root/*.whl
 docker/root/defaults/examples
+
+.local/

src/ytdl_sub/cli/main.py

@@ -19,6 +19,10 @@ from ytdl_sub.utils.logger import Logger
 
 logger = Logger.get()
 
+# View is a command to run a simple dry-run on a URL using the `_view` preset.
+# Use ytdl-sub dl arguments to use the preset
+_VIEW_EXTRA_ARGS_FORMATTER = "--preset _view --overrides.url {}"
+
 
 def _download_subscriptions_from_yaml_files(
     config: ConfigFile, args: argparse.Namespace
@@ -60,7 +64,7 @@ def _download_subscriptions_from_yaml_files(
 
 
 def _download_subscription_from_cli(
-    config: ConfigFile, args: argparse.Namespace, extra_args: List[str]
+    config: ConfigFile, dry_run: bool, extra_args: List[str]
 ) -> Tuple[Subscription, FileHandlerTransactionLog]:
     """
     Downloads a one-off subscription using the CLI
@@ -69,8 +73,8 @@ def _download_subscription_from_cli(
     ----------
     config
         Configuration file
-    args
-        Arguments from argparse
+    dry_run
+        Whether this is a dry-run
     extra_args
         Extra arguments from argparse that contain dynamic subscription options
 
@@ -88,8 +92,30 @@ def _download_subscription_from_cli(
         config=config, preset_name=subscription_name, preset_dict=subscription_args_dict
     )
 
-    logger.info("Beginning CLI %s", ("dry run" if args.dry_run else "download"))
-    return subscription, subscription.download(dry_run=args.dry_run)
+    logger.info("Beginning CLI %s", ("dry run" if dry_run else "download"))
+    return subscription, subscription.download(dry_run=dry_run)
+
+
+def _view_url_from_cli(
+    config: ConfigFile, url: str, split_chapters: bool
+) -> Tuple[Subscription, FileHandlerTransactionLog]:
+    """
+    `ytdl-sub view` dry-runs a URL to print its source variables. Use the pre-built `_view` preset,
+    inject the URL argument, and dry-run.
+    """
+    preset = "_view_split_chapters" if split_chapters else "_view"
+    subscription = Subscription.from_dict(
+        config=config,
+        preset_name="ytdl-sub-view",
+        preset_dict={"preset": preset, "overrides": {"url": url}},
+    )
+
+    logger.info(
+        "Viewing source variables for URL '%s'%s",
+        url,
+        " with split chapters" if split_chapters else "",
+    )
+    return subscription, subscription.download(dry_run=True)
 
 
 @contextmanager
@@ -146,9 +172,15 @@ def main() -> List[Tuple[Subscription, FileHandlerTransactionLog]]:
             transaction_logs = _download_subscriptions_from_yaml_files(config=config, args=args)
 
         # One-off download
-        if args.subparser == "dl":
+        elif args.subparser == "dl":
             transaction_logs.append(
-                _download_subscription_from_cli(config=config, args=args, extra_args=extra_args)
+                _download_subscription_from_cli(
+                    config=config, dry_run=args.dry_run, extra_args=extra_args
+                )
+            )
+        elif args.subparser == "view":
+            transaction_logs.append(
+                _view_url_from_cli(config=config, url=args.url, split_chapters=args.split_chapters)
             )
 
     for subscription, transaction_log in transaction_logs:

src/ytdl_sub/cli/main_args_parser.py

@@ -47,9 +47,10 @@ parser.add_argument(
     choices=LoggerLevels.names(),
     dest="ytdl_sub_log_level",
 )
+
+subparsers = parser.add_subparsers(dest="subparser")
 ###################################################################################################
 # SUBSCRIPTION PARSER
-subparsers = parser.add_subparsers(dest="subparser")
 subscription_parser = subparsers.add_parser("sub")
 subscription_parser.add_argument(
     "subscription_paths",
@@ -61,3 +62,28 @@ subscription_parser.add_argument(
 ###################################################################################################
 # DOWNLOAD PARSER
 download_parser = subparsers.add_parser("dl")
+###################################################################################################
+# VIEW PARSER
+
+
+class ViewArgs(Enum):
+    SPLIT_CHAPTERS = "--split-chapters"
+
+    @classmethod
+    def all(cls) -> List[str]:
+        """
+        Returns
+        -------
+        List of all args used in main CLI
+        """
+        return list(map(lambda arg: arg.value, cls))
+
+
+view_parser = subparsers.add_parser("view")
+view_parser.add_argument(
+    "-sc",
+    ViewArgs.SPLIT_CHAPTERS.value,
+    action="store_true",
+    help="View source variables after splitting by chapters",
+)
+view_parser.add_argument("url", help="URL to view source variables for")

src/ytdl_sub/config/preset_class_mappings.py

@@ -14,6 +14,7 @@ from ytdl_sub.plugins.audio_extract import AudioExtractPlugin
 from ytdl_sub.plugins.chapters import ChaptersPlugin
 from ytdl_sub.plugins.date_range import DateRangePlugin
 from ytdl_sub.plugins.file_convert import FileConvertPlugin
+from ytdl_sub.plugins.internal.view import ViewPlugin
 from ytdl_sub.plugins.music_tags import MusicTagsPlugin
 from ytdl_sub.plugins.nfo_tags import NfoTagsPlugin
 from ytdl_sub.plugins.output_directory_nfo_tags import OutputDirectoryNfoTagsPlugin
@@ -116,6 +117,7 @@ class PluginMapping:
     """
 
     _MAPPING: Dict[str, Type[Plugin]] = {
+        "_view": ViewPlugin,
         "audio_extract": AudioExtractPlugin,
         "date_range": DateRangePlugin,
         "file_convert": FileConvertPlugin,

src/ytdl_sub/entries/variables/entry_variables.py

@@ -1,3 +1,4 @@
+from datetime import datetime
 from typing import Union
 
 from yt_dlp.utils import sanitize_filename
@@ -447,9 +448,9 @@ class EntryVariables(BaseEntryVariables):
         Returns
         -------
         str
-            The entry's uploaded date, in YYYYMMDD format.
+            The entry's uploaded date, in YYYYMMDD format. If not present, return today's date.
         """
-        return self.kwargs(UPLOAD_DATE)
+        return self.kwargs_get(UPLOAD_DATE, datetime.now().strftime("%Y%m%d"))
 
     @property
     def upload_year(self: Self) -> int:

src/ytdl_sub/plugins/internal/view.py

@@ -0,0 +1,62 @@
+import copy
+from typing import Optional
+
+from ytdl_sub.config.preset_options import Overrides
+from ytdl_sub.entries.entry import Entry
+from ytdl_sub.plugins.output_directory_nfo_tags import OutputDirectoryNfoTagsOptions
+from ytdl_sub.plugins.plugin import Plugin
+from ytdl_sub.plugins.plugin import PluginOptions
+from ytdl_sub.plugins.plugin import PluginPriority
+from ytdl_sub.utils.file_handler import FileMetadata
+from ytdl_sub.ytdl_additions.enhanced_download_archive import EnhancedDownloadArchive
+
+
+class ViewOptions(PluginOptions):
+    """
+    INTERNAL PLUGIN. Do not expose in documentation
+    """
+
+    _optional_keys = {"_placeholder"}
+
+
+class ViewPlugin(Plugin[ViewOptions]):
+    plugin_options_type = ViewOptions
+    priority: PluginPriority = PluginPriority(modify_entry=PluginPriority.MODIFY_ENTRY_AFTER_SPLIT)
+
+    _MAX_LINE_WIDTH: int = 80
+
+    def __init__(
+        self,
+        plugin_options: OutputDirectoryNfoTagsOptions,
+        overrides: Overrides,
+        enhanced_download_archive: EnhancedDownloadArchive,
+    ):
+        super().__init__(plugin_options, overrides, enhanced_download_archive)
+        self._first_entry: Optional[Entry] = None
+
+    @classmethod
+    def _truncate_value(cls, value: str) -> str:
+        """No new lines and cut off after 80 characters"""
+        value = " <newline> ".join(str(value).split("\n"))
+        if len(value) > cls._MAX_LINE_WIDTH:
+            value = value[:77] + "..."
+
+        return value
+
+    def modify_entry(self, entry: Entry) -> Optional[Entry]:
+        """Only process the first entry received"""
+        if self._first_entry is None:
+            self._first_entry = entry
+            return entry
+
+        return None
+
+    def post_process_entry(self, entry: Entry) -> Optional[FileMetadata]:
+        """
+        Adds all source variables to the entry
+        """
+        source_var_dict = copy.deepcopy(entry.to_dict())
+        for key in source_var_dict.keys():
+            source_var_dict[key] = self._truncate_value(source_var_dict[key])
+
+        return FileMetadata.from_dict(title="Source Variables", value_dict=source_var_dict)

src/ytdl_sub/plugins/plugin.py

@@ -56,7 +56,7 @@ class Plugin(DownloadArchiver, Generic[PluginOptionsT], ABC):
     plugin_options_type: Type[PluginOptionsT] = NotImplemented
     priority: PluginPriority = PluginPriority()
 
-    # If the plugin creates multile entries from a single entry
+    # If the plugin creates multiple entries from a single entry
     is_split_plugin: bool = False
 
     def __init__(
@@ -95,7 +95,7 @@ class Plugin(DownloadArchiver, Generic[PluginOptionsT], ABC):
         """
         return []
 
-    def modify_entry(self, entry: Entry) -> Optional[Entry | Tuple[Entry, FileMetadata]]:
+    def modify_entry(self, entry: Entry) -> Optional[Entry]:
         """
         For each entry downloaded, modify the entry in some way before sending it to
         post-processing.

src/ytdl_sub/prebuilt_presets/internal/view.yaml

@@ -0,0 +1,20 @@
+presets:
+
+  _view:
+    download:
+      download_strategy: "url"
+      url: "{url}"
+    output_options:
+      output_directory: "/tmp/ytdl-sub-view"
+      file_name: "{uid}.{ext}"
+      thumbnail_name: "{uid}.{thumbnail_ext}"
+    ytdl_options:
+      max_downloads: 2
+    _view:
+      _placeholder: ""
+
+  _view_split_chapters:
+    preset:
+      - "_view"
+    split_by_chapters:
+      when_no_chapters: "pass"

src/ytdl_sub/subscriptions/subscription_download.py

@@ -217,7 +217,7 @@ class SubscriptionDownload(BaseSubscription, ABC):
 
             # If split_entry is None from modify_entry, do not post process
             if split_entry:
-                self._process_entry(
+                self._post_process_entry(
                     plugins=plugins,
                     dry_run=dry_run,
                     entry=split_entry,

tests/e2e/plugins/internal/test_view.py

@@ -0,0 +1,33 @@
+import pytest
+from e2e.conftest import mock_run_from_cli
+
+
+class TestView:
+    @pytest.mark.parametrize("split_chapters", [True, False])
+    def test_view_from_cli(
+        self,
+        music_video_config_path,
+        output_directory,
+        split_chapters,
+    ):
+
+        args = f"--config {music_video_config_path} view "
+        args += "--split-chapters " if split_chapters else ""
+        args += f"https://www.youtube.com/playlist?list=PLBsm_SagFMmdWnCnrNtLjA9kzfrRkto4i"
+        subscription_transaction_log = mock_run_from_cli(args=args)
+
+        assert len(subscription_transaction_log) == 1
+        transaction_log = subscription_transaction_log[0][1]
+
+        # Ensure the video and thumbnail are recognized
+        assert len(transaction_log.files_created) == 2
+
+        file_name = f"avUT-zd9v68{'___0' if split_chapters else ''}.webm"
+        video_file = transaction_log.files_created.get(file_name)
+        assert video_file is not None
+
+        assert "Source Variables:" in video_file.metadata
+        if split_chapters:
+            assert "  chapter_index: 1" in video_file.metadata
+        else:
+            assert "  chapter_index: 1" not in video_file.metadata

tests/e2e/plugins/test_chapters.py

@@ -68,7 +68,7 @@ class TestChapters:
             dry_run=dry_run,
             expected_download_summary_file_name="plugins/test_chapters_sb_and_embedded_subs.json",
             ignore_md5_hashes_for=[
-                "JMC - This GPU SLIDES into this Case! - Silverstone SUGO 16 ITX Case.mp4"
+                "JMC/JMC - This GPU SLIDES into this Case! - Silverstone SUGO 16 ITX Case.mp4"
             ],
         )
 
@@ -107,6 +107,6 @@ class TestChapters:
             dry_run=dry_run,
             expected_download_summary_file_name="plugins/test_chapters_from_ts_with_subs.json",
             ignore_md5_hashes_for=[
-                "JMC - This GPU SLIDES into this Case! - Silverstone SUGO 16 ITX Case.mp4"
+                "JMC/JMC - This GPU SLIDES into this Case! - Silverstone SUGO 16 ITX Case.mp4"
             ],
         )