feat: add backfills logic

backend/src/userbot/modules/jobs/handlers/backfill.py

@@ -0,0 +1,33 @@
+from userbot.modules.capture import capture_message
+from userbot.modules.jobs.context import JobContext
+from userbot.modules.jobs.registry import register
+from utils.policy.models import CaptureToggles
+
+SAVE_EVERY = 100
+
+
+@register("backfill")
+async def backfill(ctx: JobContext) -> None:
+    client = ctx.client
+    if client is None:
+        return
+    capture = getattr(client, "capture", None)
+    if capture is None:
+        return
+    chat_id = ctx.job.params["chat_id"]
+    toggles = CaptureToggles(
+        messages=True,
+        media=bool(ctx.job.params.get("media")),
+        self_destruct_media=False,
+    )
+    max_id = (ctx.job.cursor or {}).get("max_id", 0)
+    processed = ctx.job.progress.get("processed", 0)
+    kwargs = {"max_id": max_id} if max_id else {}
+    async for message in client.get_chat_history(chat_id, **kwargs):
+        await capture_message(client, message, capture, toggles)
+        processed += 1
+        if processed % SAVE_EVERY == 0:
+            next_max = message.id - 1
+            await ctx.save_cursor({"max_id": next_max})
+            await ctx.report_progress({"processed": processed, "max_id": next_max})
+    await ctx.report_progress({"processed": processed, "done": True})