folder reorganization

lib/btserver/file.py

@@ -0,0 +1,39 @@
+# -*- coding: utf-8 -*-
+
+import os
+
+from cursor import Cursor
+
+
+class File(object):
+    def __init__(self, path, base, index, size, fmap, piece_size, client):
+        self._client = client
+        self.path = path
+        self.base = base
+        self.index = index
+        self.size = size
+
+        self.piece_size = piece_size
+
+        self.full_path = os.path.join(base, path)
+        self.first_piece = fmap.piece
+        self.offset = fmap.start
+        self.last_piece = self.first_piece + max((size - 1 + fmap.start), 0) // piece_size
+
+        self.cursor = None
+
+    def create_cursor(self, offset=None):
+        self.cursor = Cursor(self)
+        if offset:
+            self.cursor.seek(offset)
+        return self.cursor
+
+    def map_piece(self, ofs):
+        return self.first_piece + (ofs + self.offset) // self.piece_size, (ofs + self.offset) % self.piece_size
+
+    def update_piece(self, n, data):
+        if self.cursor:
+            self.cursor.update_piece(n, data)
+
+    def __str__(self):
+        return self.path