Add support for cron for when alert active

README.md

@@ -36,6 +36,13 @@ These are the configuration keys:
 > minutes: 5
 > ```
 
+> **cron** 
+> Cron expression for when this alert is active
+>
+> ```
+> cron: "* 6 * * 1-5" # only active M-F 6a to 6:59a
+> ```
+
 > **notifier** (required)
 >
 > The name of the `notify.` service that should be used for notifications. The domain should not be included.

__init__.py

@@ -26,10 +26,22 @@
     vol.Optional('mute', default="False"): str,
     vol.Optional('done_message', default=''): str,
     vol.Optional('delay', default=0): vol.Any(int, float),
-
+    vol.Optional('cron', default="* * * * *"): str,
     vol.Optional('app'): APP_NAME,
 })
 
+def isfloat(num):
+    try:
+        float(num)
+        return True
+    except ValueError:
+        return False
+
+def safefloat(num, defVal):
+    try:
+        return float(num)
+    except ValueError:
+        return defVal
 
 def seconds_human(seconds):
     seconds_in_min = 60
@@ -104,6 +116,7 @@ def make_alert(config):
     @task_unique(alert_entity)
     @state_trigger(f'True or {config["condition"]} or {config["mute"]}')
     @time_trigger('startup')
+    @time_active(f'cron({config["cron"]})')
     def alert():
         try:
             alert_count = float(state.get(f'{alert_entity}.count'))