From d6dcf84bb6f4f1c09152f3ea0f4d464c7076a774 Mon Sep 17 00:00:00 2001
From: Lars Kiesow <lkiesow@uos.de>
Date: Mon, 8 Apr 2024 23:25:32 +0200
Subject: [PATCH] Initial Position after Restart

This patch ensures that the calendar data is updated at least once
before repositioning the camera. This ensures that active recordings are
no longer interrupted by moving the camera to the neutral position on
(re-)start.

This fixes #63
---
 occameracontrol/agent.py  | 2 ++
 occameracontrol/camera.py | 7 ++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/occameracontrol/agent.py b/occameracontrol/agent.py
index d10e682..ea6b1dd 100644
--- a/occameracontrol/agent.py
+++ b/occameracontrol/agent.py
@@ -60,6 +60,7 @@ class Agent:
     '''
     agent_id: str
     events: list[Event] = []
+    calendar_initialized: bool = False
 
     def __init__(self, agent_id: str):
         self.agent_id = agent_id
@@ -108,6 +109,7 @@ def update_calendar(self):
 
         self.events = self.parse_calendar(calendar)
         register_calendar_update(self.agent_id)
+        self.calendar_initialized = True
 
     def active_events(self):
         '''Return a list of active events
diff --git a/occameracontrol/camera.py b/occameracontrol/camera.py
index 1772e1a..5a4ce88 100644
--- a/occameracontrol/camera.py
+++ b/occameracontrol/camera.py
@@ -104,9 +104,14 @@ def update_position(self):
         necessary.
         '''
         agent_id = self.agent.agent_id
+        level = logging.DEBUG if int(time.time()) % 60 else logging.INFO
+
+        while not self.agent.calendar_initialized:
+            logger.log(level, '[%s] Calendar not yet initialized…', agent_id)
+            time.sleep(1)
+
         event = self.agent.next_event()
 
-        level = logging.DEBUG if int(time.time()) % 60 else logging.INFO
         if event.future():
             logger.log(level, '[%s] Next event `%s` starts in %i seconds',
                        agent_id, event.title[:40], event.start - time.time())