feat(dl): Automatically attach fonts used within SSAv4 subs

The fonts must be within the /devine/fonts folder. This folder location can be changed in the config. If a font is missing it will warn the user and continue.

Closes #82

.gitignore

@@ -9,6 +9,8 @@
 *.pem
 *.bin
 *.db
+*.ttf
+*.otf
 device_cert
 device_client_id_blob
 device_private_key

CONFIG.md

@@ -122,6 +122,7 @@ The following directories are available and may be overridden,
 - `commands` - CLI Command Classes.
 - `services` - Service Classes.
 - `vaults` - Vault Classes.
+- `fonts` - Font files (ttf or otf).
 - `downloads` - Downloads.
 - `temp` - Temporary files or conversions during download.
 - `cache` - Expiring data like Authorization tokens, or other misc data.

devine/commands/dl.py

@@ -49,6 +49,7 @@ from devine.core.services import Services
 from devine.core.titles import Movie, Song, Title_T
 from devine.core.titles.episode import Episode
 from devine.core.tracks import Audio, Subtitle, Tracks, Video
+from devine.core.tracks.attachment import Attachment
 from devine.core.utilities import get_binary_path, is_close_match, time_elapsed_since
 from devine.core.utils.click_types import LANGUAGE_RANGE, QUALITY_LIST, SEASON_RANGE, ContextData, MultipleChoice
 from devine.core.utils.collections import merge_dict
@@ -597,6 +598,28 @@ class dl:
                             if subtitle.codec != sub_format:
                                 subtitle.convert(sub_format)
 
+                with console.status("Checking Subtitles for Fonts..."):
+                    font_names = []
+                    for subtitle in title.tracks.subtitles:
+                        if subtitle.codec == Subtitle.Codec.SubStationAlphav4:
+                            for line in subtitle.path.read_text("utf8").splitlines():
+                                if line.startswith("Style: "):
+                                    font_names.append(line.removesuffix("Style: ").split(",")[1])
+
+                    font_count = 0
+                    for font_name in set(font_names):
+                        family_dir = Path(config.directories.fonts, font_name)
+                        if family_dir.exists():
+                            fonts = family_dir.glob("*.*tf")
+                            for font in fonts:
+                                title.tracks.add(Attachment(font, f"{font_name} ({font.stem})"))
+                                font_count += 1
+                        else:
+                            self.log.warning(f"Subtitle uses font [text2]{font_name}[/] but it could not be found...")
+
+                    if font_count:
+                        self.log.info(f"Attached {font_count} fonts for the Subtitles")
+
                 with console.status("Repackaging tracks with FFMPEG..."):
                     has_repacked = False
                     for track in title.tracks:

devine/core/config.py

@@ -17,6 +17,7 @@ class Config:
         commands = namespace_dir / "commands"
         services = namespace_dir / "services"
         vaults = namespace_dir / "vaults"
+        fonts = namespace_dir / "fonts"
         user_configs = Path(app_dirs.user_config_dir)
         data = Path(app_dirs.user_data_dir)
         downloads = Path.home() / "Downloads" / "devine"