+#!/usr/bin/env python3
+"""plom's task manager"""
+from http.server import BaseHTTPRequestHandler
+from http.server import HTTPServer
+from urllib.parse import urlparse
+from os.path import split as path_split
+from jinja2 import Environment as JinjaEnv, FileSystemLoader as JinjaFSLoader
+from .days import Day
+
+HTTP_PORT = 8082
+TEMPLATES_DIR = 'templates'
+
+
+class HandledException(Exception):
+ """To identify Exceptions based on expected (if faulty) user behavior."""
+
+
+class TaskServer(HTTPServer):
+ """Variant of HTTPServer that knows .jinja as Jinja Environment."""
+
+ def __init__(self, *args, **kwargs):
+ super().__init__(self, *args, **kwargs)
+ self.jinja = JinjaEnv(loader=JinjaFSLoader(TEMPLATES_DIR))
+
+
+class TaskHandler(BaseHTTPRequestHandler):
+ """Handles single HTTP request."""
+ server: TaskServer
+
+ def send_html(self, html: str, code: int = 200):
+ """Send HTML as proper HTTP response."""
+ self.send_response(code)
+ self.end_headers()
+ self.wfile.write(bytes(html, 'utf-8'))
+
+ def send_msg(self, msg: str, code: int = 400):
+ """Send message in HTML formatting as HTTP response."""
+ html = self.server.jinja.get_template('msg.html').render(msg=msg)
+ self.send_html(html, code)
+
+ def do_GET(self):
+ """Handle any GET request."""
+ try:
+ parsed_url = urlparse(self.path)
+ site = path_split(parsed_url.path)[1]
+ if 'calendar' == site:
+ html = self.do_GET_calendar()
+ else:
+ raise HandledException('Test!')
+ self.send_html(html)
+ except HandledException as error:
+ self.send_msg(error)
+
+ def do_GET_calendar(self):
+ """Show sorted Days."""
+ days = [Day('2024-01-03'), Day('2024-01-01'), Day('2024-01-02')]
+ days.sort()
+ return self.server.jinja.get_template('calendar.html').render(
+ days=days)
+
+
+def main():
+ """Main loop."""
+ server = TaskServer(('localhost', HTTP_PORT), TaskHandler)
+ print(f'running at port {HTTP_PORT}')
+ try:
+ server.serve_forever()
+ except KeyboardInterrupt:
+ print('aborting due to keyboard interrupt')
+ server.server_close()
+
+
+if __name__ == '__main__':
+ from sys import exit as sys_exit
+ try:
+ main()
+ except HandledException as e:
+ print(f'Aborting due to: {e}')
+ sys_exit(1)