added DataStore.getDailyHours()

DataStore.py

@@ -110,3 +110,24 @@ FROM %s
                 nextid = row[0] + 1
         c.close()
         return nextid
+
+    def getDailyHours(self, date):
+        hours = {}
+        c = self.conn.cursor()
+        c.execute('''
+SELECT projects.id, tasks.id, hours.seconds
+FROM projects, tasks, hours
+WHERE hours.date = ?
+  AND hours.taskid = tasks.id
+  AND tasks.projectid = projects.id
+''', (date,))
+        for row in c:
+            pid, tid, secs = row
+            if not pid in hours:
+                hours[pid] = {}
+            if not tid in hours[pid]:
+                hours[pid] = {}
+            hours[pid][tid] = secs
+        c.close()
+        self.conn.commit()
+        return hours