first draft on cron module

src/core_modules/cron.py

@@ -0,0 +1,37 @@
+import datetime, time
+from src import ModuleManager, utils
+
+class Module(ModuleManager.BaseModule):
+    def on_load(self):
+        now = datetime.datetime.utcnow()
+        next_minute = now.replace(minute=now.minute+1, second=0, microsecond=0)
+        until = time.time()+(next_minute-now).total_seconds()
+        self.timers.add("cron", self._minute, 60, until)
+
+    def _minute(self, timer):
+        now = datetime.datetime.utcnow().replace(second=0, microsecond=0)
+        timer.redo()
+
+        current_schedule = [now.minute, now.hour]
+
+        events = self.events.on("cron")
+        for cron in events.get_hooks():
+            schedule = cron.get_kwarg("schedule").split(" ")
+
+            due = True
+            for i, schedule_part in enumerate(schedule):
+                current_part = current_schedule[i]
+                if schedule_part.startswith("*/"):
+                    schedule_step = int(schedule_part.split("*/", 1)[1])
+                    if (current_part%schedule_step) == 0:
+                        continue
+                elif schedule_part == "*":
+                    continue
+                elif int(current_part) == schedule_part:
+                    continue
+
+                due = False
+                break
+
+            if due:
+                cron.call(events.make_event())