Add support for non-ellipsis open date windows

CHANGELOG.txt

@@ -1,5 +1,6 @@
 Unreleased
 ------------------
+- Allow for non-ellipsis open temporal windows (#103, @moradology)
 
 2.0.1 (2021-07-08)
 ------------------

stac_pydantic/api/search.py

@@ -50,7 +50,7 @@ def start_date(self) -> Optional[datetime]:
         values = self.datetime.split("/")
         if len(values) == 1:
             return None
-        if values[0] == "..":
+        if values[0] == ".." or values[0] == "":
             return None
         return parse_datetime(values[0])
 
@@ -59,7 +59,7 @@ def end_date(self) -> Optional[datetime]:
         values = self.datetime.split("/")
         if len(values) == 1:
             return parse_datetime(values[0])
-        if values[1] == "..":
+        if values[1] == ".." or values[1] == "":
             return None
         return parse_datetime(values[1])
 
@@ -108,8 +108,8 @@ def validate_datetime(cls, v):
 
         dates = []
         for value in values:
-            if value == "..":
-                dates.append(value)
+            if value == ".." or value == "":
+                dates.append("..")
                 continue
 
             parse_datetime(value)

tests/test_models.py

@@ -290,6 +290,10 @@ def test_temporal_search_two_tailed():
     assert search.start_date == utcnow
     assert search.end_date == None
 
+    search = Search(collections=["collection1"], datetime=f"{utcnow_str}/")
+    assert search.start_date == utcnow
+    assert search.end_date == None
+
 
 def test_temporal_search_open():
     # Test open date range