Make SubFox production-ready with parallel translation and UI controls

app/srt_parser.py

@@ -0,0 +1,41 @@
+# app/srt_parser.py
+import re
+from typing import List, Dict
+
+
+SRT_BLOCK_RE = re.compile(
+    r"(\d+)\s*\n"
+    r"(\d{2}:\d{2}:\d{2},\d{3})\s-->\s(\d{2}:\d{2}:\d{2},\d{3})\s*\n"
+    r"(.*?)(?=\n{2,}|\Z)",
+    re.DOTALL,
+)
+
+
+def parse_srt(content: str) -> List[Dict[str, str]]:
+    normalized = content.replace("\r\n", "\n").replace("\r", "\n").strip()
+
+    blocks = []
+    for match in SRT_BLOCK_RE.finditer(normalized):
+        index, start, end, text = match.groups()
+        blocks.append(
+            {
+                "index": int(index),
+                "start": start,
+                "end": end,
+                "text": text.strip(),
+            }
+        )
+
+    return blocks
+
+
+def build_srt(blocks: List[Dict[str, str]]) -> str:
+    output = []
+
+    for i, block in enumerate(blocks, start=1):
+        output.append(str(i))
+        output.append(f"{block['start']} --> {block['end']}")
+        output.append(block["text"])
+        output.append("")
+
+    return "\n".join(output).strip() + "\n"