Simplify input format options

Simplified the competing options json and youtube into --from which can
then select format.

summarize.py

@@ -56,20 +56,20 @@ def grab_subtitles(url: str | Path) -> Path:
     raise ValueError("No correct json3 transcript object found.")
 
 
+INPUT_FORMATS = ["json3", "yt", "txt"]
+
+
 @click.command()
 # TODO: Can I set it so it checks existence *only* when no youtube flag exists?
+# TODO: Implement some way to allow content passed in on stdin instead of file (- as arg?)
 @click.argument("file_path", type=click.Path(exists=False))
 @click.option(
-    "--json-transcript/--no-json-transcript",
-    "-j",
-    default=False,
-    help="Use downloaded json3 transcript.",
-)
-@click.option(
-    "--youtube/--no-youtube",
-    "-t",
-    default=False,
-    help="Get (english) transcript from youtube link.",
+    "--from",
+    "-f",
+    "get_from",
+    type=click.Choice(INPUT_FORMATS),
+    default="txt",
+    help="Choose format to process between json transcript, yt link or txt file.",
 )
 @click.option(
     "--prompt",
@@ -77,6 +77,7 @@ def grab_subtitles(url: str | Path) -> Path:
     default="Please summarize the following transcript:",
     type=str,
     help="Use custom prompt.",
+    
 )
 @click.option(
     "--log-level",
@@ -86,10 +87,9 @@ def grab_subtitles(url: str | Path) -> Path:
 )
 def cli(
     file_path: Path | str,
-    json_transcript: bool,
-    youtube: bool,
     prompt: str,
     log_level: int,
+    get_from: str,
 ):
     """Provide summary for a file at the specified path or a youtube video at the specified url."""
 
@@ -100,7 +100,7 @@ def cli(
     content = ""
 
     # youtube link, dl transcript
-    if youtube:
+    if get_from == "yt":
         file_path = grab_subtitles(file_path)
 
     file_path = cast(Path, file_path)
@@ -109,7 +109,7 @@ def cli(
     with Path(file_path).open() as f:
         content = f.read()
 
-    if json_transcript or youtube:
+    if get_from == "json3" or get_from == "yt":
         content = extract_transcript_contents(content)
 
     dprint(f"content = {content}")