Re-structure for unittest usage.

[plomtask] / plomtask / task.py

diff --git a/plomtask/task.py b/plomtask/task.py
new file mode 100755 (executable)
index 0000000..49ca883
--- /dev/null
+++ b/plomtask/task.py
@@ -0,0 +1,79 @@
+#!/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)