add dynmap update script

python/dynmap-update-checker.py

@@ -0,0 +1,55 @@
+import os
+import requests
+
+def must_get_env(name):
+    v = os.getenv(name)
+    if not v:
+        raise Exception(f"missing environment variable '{name}'")
+    return v
+
+
+PROJECT = must_get_env("PROJECT")
+VERSION = must_get_env("VERSION")
+NTFY_ADDRESS = must_get_env("NTFY_ADDRESS")
+NTFY_TOKEN = must_get_env("NTFY_TOKEN")
+
+
+def split_at(s, sep):
+    split = s.split(sep, 1)
+    split.extend([None, None][:2-len(split)])
+    return split
+
+
+
+def main():
+    versions = requests.get(f"https://api.modrinth.com/v2/project/{PROJECT}/version").json()
+    
+    (version, loader) = split_at(VERSION, '@')
+
+    v = find_version(versions, version, loader)
+    
+    if v:
+        res = requests.put(
+            NTFY_ADDRESS, 
+            headers={
+                "Authorization": f"Bearer {NTFY_TOKEN}",
+                "Title": f"{PROJECT} update available!",
+            },
+            data=f"Version {version} is now available for {PROJECT}!")
+        print(res)
+
+    pass
+
+
+def find_version(versions, desired_version, loader):
+    for version in versions:
+        if desired_version not in version.get("game_versions"):
+            continue
+        if loader and loader not in version.get("loaders"):
+            continue
+        return version
+    return None
+
+
+if __name__ == "__main__":
+    main()