From 9b365bd3b383f14c65fa77a6e2df755fb1f1dfdb Mon Sep 17 00:00:00 2001
From: Alex Coleman <alexjcoleman@gmail.com>
Date: Wed, 2 Aug 2023 19:22:18 +0000
Subject: [PATCH 1/2] turn off date parsing with PyYAML

approach taken from https://stackoverflow.com/a/37958106/10651182
---
 _scripts/generate_posts/generate_posts.py | 29 ++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/_scripts/generate_posts/generate_posts.py b/_scripts/generate_posts/generate_posts.py
index 458e1c1..fe876d2 100644
--- a/_scripts/generate_posts/generate_posts.py
+++ b/_scripts/generate_posts/generate_posts.py
@@ -10,9 +10,12 @@
 
 
 def main(override=False):
+
+    NoDatesSafeLoader.remove_implicit_resolver('tag:yaml.org,2002:timestamp')
+
     with open("_data/main.yaml", "r") as open_file:
         try:
-            data = yaml.safe_load(open_file)
+            data = yaml.load(open_file, Loader = NoDatesSafeLoader)
 
         except yaml.YAMLError as err:
             print(err)
@@ -52,6 +55,30 @@ def main(override=False):
 
     return
 
+class NoDatesSafeLoader(yaml.SafeLoader):
+    """
+    Copied under CC-BY-SA 3.0
+    https://stackoverflow.com/a/37958106/10651182
+    """
+    @classmethod
+    def remove_implicit_resolver(cls, tag_to_remove):
+        """
+        Remove implicit resolvers for a particular tag
+
+        Takes care not to modify resolvers in super classes.
+
+        We want to load datetimes as strings, not dates, because we
+        go on to serialise as json which doesn't have the advanced types
+        of yaml, and leads to incompatibilities down the track.
+        """
+        if not 'yaml_implicit_resolvers' in cls.__dict__:
+            cls.yaml_implicit_resolvers = cls.yaml_implicit_resolvers.copy()
+
+        for first_letter, mappings in cls.yaml_implicit_resolvers.items():
+            cls.yaml_implicit_resolvers[first_letter] = [(tag, regexp) 
+                                                         for tag, regexp in mappings
+                                                         if tag != tag_to_remove]
+
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser("RSE Events page post generator")

From 482c8f22975f8f2e4540d36c5613dfd9c1a74fab Mon Sep 17 00:00:00 2001
From: Alex Coleman <alexjcoleman@gmail.com>
Date: Wed, 2 Aug 2023 19:23:59 +0000
Subject: [PATCH 2/2] use dateutil to flexibly parse begin field of event

this allows us to more flexibly parse event dates that occur in formats like YYYY-MM-DD or YYYY-MM-DD HH:MM.
This partially addresses elements in https://github.com/Sparrow0hawk/rse-calendar/issues/61
---
 _scripts/generate_posts/generate_posts.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/_scripts/generate_posts/generate_posts.py b/_scripts/generate_posts/generate_posts.py
index fe876d2..9f072df 100644
--- a/_scripts/generate_posts/generate_posts.py
+++ b/_scripts/generate_posts/generate_posts.py
@@ -4,6 +4,7 @@
 import datetime
 import argparse
 import logging
+from dateutil.parser import parse
 
 LOG_LEVEL = os.environ.get("LOGLEVEL")
 logging.basicConfig(level=LOG_LEVEL)
@@ -33,12 +34,14 @@ def main(override=False):
 
     for event in data:
 
+        event_date = parse(event["begin"])
+
         # calculate a post end date 
-        postEndDate = event["begin"] + datetime.timedelta(**event["duration"])
+        postEndDate = event_date + datetime.timedelta(**event["duration"])
 
         if postEndDate >= today:
             filename = (
-                str(event["begin"].strftime("%Y-%m-%d"))
+                str(event_date.strftime("%Y-%m-%d"))
                 + "-"
                 + event["summary"].strip().replace(" ", "_")
             )