From 08ca1d053bd14e2b5d130fafe3d5b3d50390fd69 Mon Sep 17 00:00:00 2001
From: Bob Mottram <bob@freedombone.net>
Date: Fri, 3 Jul 2020 20:21:48 +0100
Subject: [PATCH] Module name

---
 followingCalendar.py | 89 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 followingCalendar.py

diff --git a/followingCalendar.py b/followingCalendar.py
new file mode 100644
index 00000000..92a04b9e
--- /dev/null
+++ b/followingCalendar.py
@@ -0,0 +1,89 @@
+__filename__ = "followingCalendar.py"
+__author__ = "Bob Mottram"
+__license__ = "AGPL3+"
+__version__ = "1.1.0"
+__maintainer__ = "Bob Mottram"
+__email__ = "bob@freedombone.net"
+__status__ = "Production"
+
+import os
+
+
+def receivingCalendarEvents(baseDir: str, nickname: str, domain: str,
+                            followingNickname: str,
+                            followingDomain: str) -> bool:
+    """Returns true if receiving calendar events from the given
+    account from following.txt
+    """
+    calendarFilename = baseDir + '/accounts/' + \
+        nickname + '@' + domain + '/followingCalendar.txt'
+    handle = followingNickname + '@' + followingDomain
+    if not os.path.isfile(calendarFilename):
+        return False
+    return handle + '\n' in open(calendarFilename).read()
+
+
+def receiveCalendarEvents(baseDir: str, nickname: str, domain: str,
+                          followingNickname: str,
+                          followingDomain: str,
+                          add: bool) -> None:
+    """Adds or removes a handle from the following.txt list into a list
+    indicating whether to receive calendar events from that account
+    """
+    # check that a following file exists
+    followingFilename = baseDir + '/accounts/' + \
+        nickname + '@' + domain + '/following.txt'
+    if not os.path.isfile(followingFilename):
+        return
+    handle = followingNickname + '@' + followingDomain
+
+    # check that you are following this handle
+    if handle + '\n' not in open(followingFilename).read():
+        return
+
+    calendarFilename = baseDir + '/accounts/' + \
+        nickname + '@' + domain + '/followingCalendar.txt'
+
+    # get the contents of the calendar file, which is
+    # a set of handles
+    followingHandles = ''
+    if os.path.isfile(calendarFilename):
+        with open(calendarFilename, 'r') as calendarFile:
+            followingHandles = calendarFile.read()
+    else:
+        # create a new calendar file from the following file
+        with open(followingFilename, 'r') as followingFile:
+            followingHandles = followingFile.read()
+            with open(calendarFilename, 'w') as fp:
+                fp.write(followingHandles)
+
+    # already in the calendar file?
+    if handle + '\n' in followingHandles:
+        if add:
+            # already added
+            return
+        # remove from calendar file
+        followingHandles = followingHandles.replace(handle + '\n', '')
+        with open(calendarFilename, 'w') as fp:
+            fp.write(followingHandles)
+    else:
+        # not already in the calendar file
+        if add:
+            # append to the list of handles
+            followingHandles += handle + '\n'
+            with open(calendarFilename, 'w') as fp:
+                fp.write(followingHandles)
+
+
+def addPersonToCalendar(baseDir: str, nickname: str, domain: str,
+                        followingNickname: str,
+                        followingDomain: str) -> None:
+    receiveCalendarEvents(baseDir, nickname, domain,
+                          followingNickname, followingDomain, True)
+
+
+def removePersonFromCalendar(baseDir: str, nickname: str, domain: str,
+                             followingNickname: str,
+                             followingDomain: str) -> None:
+    receiveCalendarEvents(baseDir, nickname, domain,
+                          followingNickname, followingDomain, False)