From 45cf24206d986119ed529e5cadc524682ee3a470 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Wed, 22 Jun 2011 12:58:49 -0600
Subject: [PATCH] API for kiwidude

---
 src/calibre/library/database2.py | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/calibre/library/database2.py b/src/calibre/library/database2.py
index 4c61438e35..6848e3c6ae 100644
--- a/src/calibre/library/database2.py
+++ b/src/calibre/library/database2.py
@@ -7,7 +7,7 @@ __docformat__ = 'restructuredtext en'
 The database used to store ebook metadata
 '''
 import os, sys, shutil, cStringIO, glob, time, functools, traceback, re, \
-        json, uuid, tempfile
+        json, uuid, tempfile, hashlib
 import threading, random
 from itertools import repeat
 from math import ceil
@@ -1118,9 +1118,26 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
         return self.format_abspath(index, format, index_is_id) is not None
 
     def format_last_modified(self, id_, fmt):
+        m = self.format_metadata(id_, fmt)
+        if m:
+            return m['mtime']
+
+    def format_metadata(self, id_, fmt):
         path = self.format_abspath(id_, fmt, index_is_id=True)
+        ans = {}
         if path is not None:
-            return utcfromtimestamp(os.stat(path).st_mtime)
+            stat = os.stat(path)
+            ans['size'] = stat.st_size
+            ans['mtime'] = utcfromtimestamp(stat.st_mtime)
+        return ans
+
+    def format_hash(self, id_, fmt):
+        data = self.format(id_, fmt, index_is_id=True)
+        if data is None:
+            raise NoSuchFormat('Record %d has no fmt: %s'%(id_, fmt))
+        sha = hashlib.sha256()
+        sha.update(data)
+        return sha.hexdigest()
 
     def format_abspath(self, index, format, index_is_id=False):
         '''