added api for ai; got backend working

backend/caption_generator.py

@@ -0,0 +1,78 @@
+#!/usr/bin/env python3
+"""
+Generate caption files from word-level timestamps.
+"""
+
+import json
+import sys
+from pathlib import Path
+
+# Add backend to path
+sys.path.insert(0, str(Path(__file__).parent))
+
+from services.caption_generator import generate_srt, generate_vtt, generate_ass, save_captions
+
+
+def main():
+    if len(sys.argv) < 2:
+        print("Usage: python caption_generator.py <command> [args...]", file=sys.stderr)
+        sys.exit(1)
+
+    command = sys.argv[1]
+
+    try:
+        if command == "generate_srt":
+            if len(sys.argv) < 4:
+                print("Usage: python caption_generator.py generate_srt <words_json> [deleted_indices_json] [words_per_line]", file=sys.stderr)
+                sys.exit(1)
+            words = json.loads(sys.argv[2])
+            deleted_indices = set(json.loads(sys.argv[3])) if len(sys.argv) > 3 and sys.argv[3] != "null" else None
+            words_per_line = int(sys.argv[4]) if len(sys.argv) > 4 else 8
+
+            result = generate_srt(words, deleted_indices, words_per_line)
+            print(json.dumps({"content": result}))
+
+        elif command == "generate_vtt":
+            if len(sys.argv) < 4:
+                print("Usage: python caption_generator.py generate_vtt <words_json> [deleted_indices_json] [words_per_line]", file=sys.stderr)
+                sys.exit(1)
+            words = json.loads(sys.argv[2])
+            deleted_indices = set(json.loads(sys.argv[3])) if len(sys.argv) > 3 and sys.argv[3] != "null" else None
+            words_per_line = int(sys.argv[4]) if len(sys.argv) > 4 else 8
+
+            result = generate_vtt(words, deleted_indices, words_per_line)
+            print(json.dumps({"content": result}))
+
+        elif command == "generate_ass":
+            if len(sys.argv) < 4:
+                print("Usage: python caption_generator.py generate_ass <words_json> [deleted_indices_json] [words_per_line] [style_json]", file=sys.stderr)
+                sys.exit(1)
+            words = json.loads(sys.argv[2])
+            deleted_indices = set(json.loads(sys.argv[3])) if len(sys.argv) > 3 and sys.argv[3] != "null" else None
+            words_per_line = int(sys.argv[4]) if len(sys.argv) > 4 else 8
+            style = json.loads(sys.argv[5]) if len(sys.argv) > 5 and sys.argv[5] != "null" else None
+
+            result = generate_ass(words, deleted_indices, words_per_line, style)
+            print(json.dumps({"content": result}))
+
+        elif command == "save_captions":
+            if len(sys.argv) != 4:
+                print("Usage: python caption_generator.py save_captions <content> <output_path>", file=sys.stderr)
+                sys.exit(1)
+            content = sys.argv[2]
+            output_path = sys.argv[3]
+
+            result = save_captions(content, output_path)
+            print(json.dumps({"output_path": result}))
+
+        else:
+            print(f"Unknown command: {command}", file=sys.stderr)
+            sys.exit(1)
+
+    except Exception as e:
+        print(json.dumps({"error": str(e)}), file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()