add missing converter functions

pyexcel_io/service.py

@@ -164,6 +164,38 @@ VALUE_CONVERTERS = {
 }
 
 
+def ods_date_value(value):
+    return value.strftime("%Y-%m-%d")
+
+
+def ods_time_value(value):
+    return value.strftime("PT%HH%MM%SS")
+
+
+def ods_bool_value(value):
+    """convert a boolean value to text"""
+    if value is True:
+        return "true"
+    else:
+        return "false"
+
+
+def ods_timedelta_value(cell):
+    """convert a cell value to time delta"""
+    hours = cell.days * 24 + cell.seconds // 3600
+    minutes = (cell.seconds // 60) % 60
+    seconds = cell.seconds % 60
+    return "PT%02dH%02dM%02dS" % (hours, minutes, seconds)
+
+
+ODS_VALUE_CONVERTERS = {
+    "date": ods_date_value,
+    "time": ods_time_value,
+    "boolean": ods_bool_value,
+    "timedelta": ods_timedelta_value
+}
+
+
 VALUE_TOKEN = {
     "float": "value",
     "date": "date-value",