Add initial config validation

homeassistant/helpers/config_validation.py

@@ -0,0 +1,65 @@
+"""Helpers for config validation using voluptuous."""
+import voluptuous as vol
+
+from homeassistant.const import (
+    CONF_PLATFORM, TEMP_CELCIUS, TEMP_FAHRENHEIT)
+from homeassistant.helpers.entity import valid_entity_id
+import homeassistant.util.dt as dt_util
+
+# pylint: disable=invalid-name
+
+PLATFORM_SCHEMA = vol.Schema({
+    vol.Required(CONF_PLATFORM): str,
+}, extra=vol.ALLOW_EXTRA)
+
+latitude = vol.All(vol.Coerce(float), vol.Range(min=-90, max=90))
+longitude = vol.All(vol.Coerce(float), vol.Range(min=-180, max=180))
+
+
+def entity_id(value):
+    """Validate Entity ID."""
+    if valid_entity_id(value):
+        return value
+    raise vol.Invalid('Entity ID {} does not match format <domain>.<object_id>'
+                      .format(value))
+
+
+def entity_ids(value):
+    """Validate Entity IDs."""
+    if isinstance(value, str):
+        value = [ent_id.strip() for ent_id in value.split(',')]
+
+    for ent_id in value:
+        entity_id(ent_id)
+
+    return value
+
+
+def icon(value):
+    """Validate icon."""
+    value = str(value)
+
+    if value.startswith('mdi:'):
+        return value
+
+    raise vol.Invalid('Icons should start with prefix "mdi:"')
+
+
+def temperature_unit(value):
+    """Validate and transform temperature unit."""
+    if isinstance(value, str):
+        value = value.upper()
+        if value == 'C':
+            return TEMP_CELCIUS
+        elif value == 'F':
+            return TEMP_FAHRENHEIT
+    raise vol.Invalid('Invalid temperature unit. Expected: C or F')
+
+
+def time_zone(value):
+    """Validate timezone."""
+    if dt_util.get_time_zone(value) is not None:
+        return value
+    raise vol.Invalid(
+        'Invalid time zone passed in. Valid options can be found here: '
+        'http://en.wikipedia.org/wiki/List_of_tz_database_time_zones')