From 71b0cfeef0c0edc6ce54a876fc356b4d3403735d Mon Sep 17 00:00:00 2001
From: Benjamin Saller <bcsaller@objectrealms.net>
Date: Fri, 20 Jul 2007 21:41:11 +0000
Subject: limited support for dateranges, this will have to expand to include all the types

---
diff --git a/src/olpc/datastore/utils.py b/src/olpc/datastore/utils.py
index 711007e..0505463 100644
--- a/src/olpc/datastore/utils.py
+++ b/src/olpc/datastore/utils.py
@@ -110,7 +110,8 @@ def sanitize_dbus(method):
         return method(self, *n, **kw)
     return decorator
 
-def timeparse(t, format):
+DATEFORMAT = "%Y-%m-%dT%H:%M:%S"
+def timeparse(t, format=DATEFORMAT):
     """Parse a time string that might contain fractions of a second.
 
     Fractional seconds are supported using a fragile, miserable hack.
@@ -151,3 +152,11 @@ def timeparse(t, format):
         raise
 
 
+def parse_timestamp_or_float(value):
+    result = None
+    try:
+        result = timeparse(value)
+        result = str(time.mktime(result.timetuple()))
+    except:
+        result = str(float(value))
+    return result
diff --git a/src/olpc/datastore/xapianindex.py b/src/olpc/datastore/xapianindex.py
index 0be462d..a6f8994 100644
--- a/src/olpc/datastore/xapianindex.py
+++ b/src/olpc/datastore/xapianindex.py
@@ -25,7 +25,7 @@ import secore
 
 from olpc.datastore import model 
 from olpc.datastore.converter import converter
-from olpc.datastore.utils import create_uid
+from olpc.datastore.utils import create_uid, parse_timestamp_or_float
 
 
 # Setup Logger
@@ -349,7 +349,20 @@ class IndexManager(object):
             else:
                 # each term becomes part of the query join
                 for k, v in query.iteritems():
-                    queries.append(ri.query_field(k, v))
+                    if isinstance(v, dict):
+                        # it might be a range scan
+                        # this needs to be factored out
+                        # and/or we need client side lib that helps
+                        # issue queries because there are type
+                        # conversion issues here
+                        start = v.pop('start', 0)
+                        end = v.pop('end', sys.maxint)
+                        start = parse_timestamp_or_float(start)
+                        end = parse_timestamp_or_float(end)
+                        queries.append(ri.query_range(k, start, end))
+                    else:
+                        queries.append(ri.query_field(k, v))
+                        
                 q = ri.query_composite(ri.OP_AND, queries)
         else:
             q = self.parse_query(query)
diff --git a/tests/dateranges.txt b/tests/dateranges.txt
new file mode 100644
index 0000000..886e7d2
--- /dev/null
+++ b/tests/dateranges.txt
@@ -0,0 +1,42 @@
+Test that date
+First clean up from any other tests.
+>>> import os, datetime
+>>> assert os.system('rm -rf /tmp/test_ds/') == 0
+
+>>> from olpc.datastore import DataStore
+>>> from olpc.datastore import backingstore, model
+>>> ds = DataStore()
+>>> ds.registerBackend(backingstore.FileBackingStore)
+
+>>> assert ds.mount("/tmp/test_ds")
+
+>>> t1 = datetime.datetime(1995, 1, 1)
+>>> t2 = datetime.datetime(2000, 1, 1)
+>>> t3 = datetime.datetime(2005, 1, 1)
+
+>>> a = ds.create(dict(title="Content A", author="Bob", ctime=t1.isoformat()), '')
+>>> b = ds.create(dict(title="Content B", author="Alice", ctime=t2.isoformat()), '')
+>>> c = ds.create(dict(title="Content V", author="Clare", ctime=t3.isoformat()), '')        
+
+>>> ds.complete_indexing()
+
+
+Scan for ranges
+
+>>> result, count = ds.find({'ctime' : {'start' : t1.isoformat(), 'end' : t3.isoformat() }})
+>>> assert count == 3
+
+
+>>> result, count = ds.find({'ctime' : {'start' : t1.isoformat(), 'end' : t2.isoformat() }})
+>>> assert count == 2
+
+>>> result, count = ds.find({'ctime' : {'start' : t2.isoformat(), 'end' : t3.isoformat() }})
+>>> assert count == 2
+
+>>> result, count = ds.find({'ctime' : {'start' : t1.isoformat(), 'end' : t1.isoformat() }})
+>>> assert count == 1
+
+
+>>> ds.stop()
+>>> del ds
+>>> assert os.system('rm -rf /tmp/test_ds/') == 0
diff --git a/tests/runalltests.py b/tests/runalltests.py
index 896972f..52ec486 100644
--- a/tests/runalltests.py
+++ b/tests/runalltests.py
@@ -27,6 +27,7 @@ doctests = [
     resource_filename(__name__, "milestone_2.txt"),
     resource_filename(__name__, "mountpoints.txt"),
     resource_filename(__name__, "properties.txt"),
+    resource_filename(__name__, "dateranges.txt"),
     
 ]
 
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