change to use jinja2 and stop saving file and then reading the data

main.py

@@ -3,22 +3,23 @@ from datetime import datetime, timezone
 import pytz
 import hashlib
 import os
-from flask import Flask, request, send_file, render_template
+from flask import Flask, request, send_file, render_template, Response
 import requests
 from requests_ntlm import HttpNtlmAuth
+import urllib
 
 # ------------------------------------------------------------
 # Config
 # ------------------------------------------------------------
 
-RESPONSE_FILE = "response.txt"
-OLD_CALENDAR = "old_calendar.ics"
-NEW_CALENDAR = "calendar.ics"
 LOCAL_TZ = pytz.timezone("Europe/London")
 URL = "https://webapp.coventry.ac.uk/Timetable-main/Timetable/Current"
 
+print(URL.format(urllib.parse.quote_plus("hello/world")))
+
 app = Flask(__name__)
 
+
 def parse_events(events_data):
     events_data = events_data.replace("new Date", "")
     cleaned_data = ""
@@ -52,10 +53,7 @@ def parse_events(events_data):
     return parsed_data
 
 
-def get_events_data_from_file(path):
+def get_events_data(page_data):
-    with open(path, "r", encoding="utf-8") as f:
-        page_data = f.read()
-
     soup = BeautifulSoup(page_data, features="html.parser")
 
     for script in soup.head.find_all("script", {"type": "text/javascript"}):
@@ -89,6 +87,7 @@ def create_ics_event(event):
 
 def load_existing_uids(path):
     uids = set()
+    return uids
     if not os.path.exists(path):
         return uids
 
@@ -111,6 +110,7 @@ def load_existing_uids(path):
 
     return uids
 
+
 def fetch_timetable(username, password):
     session = requests.Session()
     session.auth = HttpNtlmAuth(username, password)
@@ -118,16 +118,17 @@ def fetch_timetable(username, password):
     r = session.get(URL)
     r.raise_for_status()
 
-    with open("response.txt", "w", encoding="utf-8") as f:
+    session.close()
-        f.write(r.text)
+    return r.text
 
-def build_calendar():
+
-    events_js = get_events_data_from_file(RESPONSE_FILE)
+def build_calendar(page_data):
+    events_js = get_events_data(page_data)
     parsed_events = parse_events(events_js)
 
     new_events = [create_ics_event(e) for e in parsed_events if e]
 
-    old_uids = load_existing_uids(OLD_CALENDAR)
+    old_uids = set()
     new_uids = {e["uid"] for e in new_events}
 
     now = ics_time(datetime.now(timezone.utc))
@@ -140,55 +141,58 @@ def build_calendar():
     ]
 
     for ev in new_events:
-        lines.extend([
+        lines.extend(
-            "BEGIN:VEVENT",
+            [
-            f"UID:{ev['uid']}",
+                "BEGIN:VEVENT",
-            f"DTSTAMP:{now}",
+                f"UID:{ev['uid']}",
-            f"DTSTART:{ics_time(ev['start'])}",
+                f"DTSTAMP:{now}",
-            f"DTEND:{ics_time(ev['end'])}",
+                f"DTSTART:{ics_time(ev['start'])}",
-            f"SUMMARY:{ev['summary']}",
+                f"DTEND:{ics_time(ev['end'])}",
-            f"DESCRIPTION:{ev['description']}",
+                f"SUMMARY:{ev['summary']}",
-            "END:VEVENT",
+                f"DESCRIPTION:{ev['description']}",
-        ])
+                "END:VEVENT",
+            ]
+        )
 
     for uid in old_uids - new_uids:
-        lines.extend([
+        lines.extend(
-            "BEGIN:VEVENT",
+            [
-            f"UID:{uid}",
+                "BEGIN:VEVENT",
-            f"DTSTAMP:{now}",
+                f"UID:{uid}",
-            "STATUS:CANCELLED",
+                f"DTSTAMP:{now}",
-            "END:VEVENT",
+                "STATUS:CANCELLED",
-        ])
+                "END:VEVENT",
+            ]
+        )
 
     lines.append("END:VCALENDAR")
 
-    with open(NEW_CALENDAR, "w", encoding="utf-8") as f:
+    return "\n".join(lines)
-        f.write("\n".join(lines))
+
+
 # ------------------------------------------------------------
 # Flask
 # ------------------------------------------------------------
 @app.route("/")
 def index():
-    return render_template("index.html")
+    return render_template("login.jinja")
+
 
 @app.route("/login-and-download", methods=["POST"])
 def login_and_download():
-    data = request.get_json()
+    data = request.form
     username = data["username"]
     password = data["password"]
-    username = f'COVENTRY\\{username}'
     try:
-        fetch_timetable(username, password)  #request
+        data = build_calendar(fetch_timetable(f"COVENTRY\\{username}", password))
-        build_calendar()
+        return Response(
-        return send_file(
+            data,
-            NEW_CALENDAR,
+            mimetype="text/calendar",
-            as_attachment=True,
+            headers={"Content-Disposition": f'attachment; filename="{username}-timetable.ics"'},
-            download_name="timetable.ics",
-            mimetype="text/calendar"
         )
     except Exception as e:
-        return str(e), 400
+        return render_template("login.jinja", error=str(e)), 401
 
 
 if __name__ == "__main__":
-    app.run(debug=True)
+    app.run(debug=True)

requirements.txt

@@ -1,5 +1,24 @@
 beautifulsoup4==4.14.3
+blinker==1.9.0
 bs4==0.0.2
+certifi==2026.1.4
+cffi==2.0.0
+charset-normalizer==3.4.4
+click==8.3.1
+cryptography==46.0.3
+Flask==3.1.2
+gunicorn==24.0.0
+idna==3.11
+itsdangerous==2.2.0
+Jinja2==3.1.6
+MarkupSafe==3.0.3
+packaging==26.0
+pycparser==3.0
+pyspnego==0.12.0
 pytz==2025.2
+requests==2.32.5
+requests_ntlm==1.3.0
 soupsieve==2.8.2
 typing_extensions==4.15.0
+urllib3==2.6.3
+Werkzeug==3.1.5

static/styles.css

@@ -0,0 +1,94 @@
+:root {
+  --text: #e3f2fc;
+  --background: #031621;
+  --primary: #a1c5da;
+  --secondary: #6a139b;
+  --accent: #52ace0;
+}
+
+
+body {
+  font-family: Arial, sans-serif;
+  color: var(--text);
+  margin: 0;
+  background: var(--background);
+  /* fallback dark color */
+}
+
+body::before {
+  content: "";
+  position: fixed;
+  top: 0;
+  left: 0;
+  width: 200vw;
+  height: 200vh;
+  background: radial-gradient(circle at 50% 0%, var(--accent) 0%, var(--background) 70%);
+  animation: moveLight 30s ease-in-out infinite alternate;
+  z-index: -1;
+}
+
+@keyframes moveLight {
+  0% {
+    transform: translate(-50%, -50%);
+  }
+
+  50% {
+    transform: translate(-25%, -40%);
+  }
+
+  100% {
+    transform: translate(0%, -50%);
+  }
+}
+
+.login-box {
+  position: absolute;
+    inset: 0px;
+  width: fit-content;
+  height: fit-content;
+  max-width: 100vw;
+  max-height: 100dvh;
+  margin: auto;
+  background: var(--background);
+  padding: 30px;
+  border-radius: 8px;
+  text-align:  center;
+  border: solid 1px var(--accent);
+  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  width: 300px;
+}
+
+input {
+  width: 100%;
+  padding: 8px;
+  margin: 8px 0;
+  background-color: var(--background);
+  color: var(--text);
+  border: solid 1px var(--accent);
+  border-radius: 8px;
+}
+
+button {
+  margin-top: 1rem;
+  width: 100%;
+  padding: 10px;
+  background: var(--accent);
+  color: var(--background);
+  font-size: large;
+  font-weight: bold;
+  border: none;
+  cursor: pointer;
+}
+
+button:hover {
+  background: var(--primary);
+  color: var(--background);
+}
+
+.error {
+  color: red;
+  margin-top: 10px;
+}

templates/base.jinja

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+    <link rel="icon" type="image/png" sizes="96x96" href="{{ url_for('static', filename='favicon-96x96.png') }}">
+    <link rel="icon" type="image/svg+xml" href="{{ url_for('static', filename='favicon.svg') }}">
+    <link rel="shortcut icon" href="{{ url_for('static', filename='favicon.ico') }}">
+    <link rel="apple-touch-icon" sizes="180x180" href="{{ url_for('static', filename='apple-touch-icon.png') }}">
+    <meta name="apple-mobile-web-app-title" content="Timtabla">
+    <link rel="manifest" href="{{ url_for('static', filename='site.webmanifest') }}">
+    <meta charset="UTF-8">
+    <title>Timtabla{% if page_title|trim %} - {{ page_title|trim }}{% endif %}</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='styles.css') }}">
+    {% block head %}{% endblock %}
+</head>
+
+<body>
+
+</body>
+    {% block body %}{% endblock %}
+</html>

templates/index.html

@@ -1,96 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-<head>
-    <link rel="icon" type="image/png" sizes="96x96" href="{{ url_for('static', filename='favicon-96x96.png') }}">
-    <link rel="icon" type="image/svg+xml" href="{{ url_for('static', filename='favicon.svg') }}">
-    <link rel="shortcut icon" href="{{ url_for('static', filename='favicon.ico') }}">
-    <link rel="apple-touch-icon" sizes="180x180" href="{{ url_for('static', filename='apple-touch-icon.png') }}">
-    <meta name="apple-mobile-web-app-title" content="Timtabla">
-    <link rel="manifest" href="{{ url_for('static', filename='site.webmanifest') }}">
-    <meta charset="UTF-8">
-    <title>Timtabla</title>
-    <style>
-        body {
-            font-family: Arial, sans-serif;
-            margin: 0;
-            height: 100vh;
-            display: flex;
-            justify-content: center;
-            align-items: center;
-            background: linear-gradient(135deg, #03551B, #0b3c5d);
-        }
-
-        .login-box {
-            background:white;
-            padding:30px;
-            border-radius:8px;
-            box-shadow:0 0 10px rgba(0,0,0,0.1);
-            width:300px;
-        }
-        input {
-            width:100%;
-            padding:8px;
-            margin:8px 0;
-        }
-        button {
-            width:100%;
-            padding:10px;
-            background:#0066cc;
-            color:white;
-            border:none;
-            cursor:pointer;
-        }
-        button:hover {
-            background:#004999;
-        }
-        .error {
-            color:red;
-            margin-top:10px;
-        }
-    </style>
-</head>
-<body>
-    <div class="login-box">
-        <h2>Login to Download</h2>
-        <input type="text" id="username" placeholder="Username" required>
-        <input type="password" id="password" placeholder="Password" required>
-        <button onclick="loginAndDownload()">Login & Download</button>
-        <div class="error" id="errorMsg"></div>
-    </div>
-    <script>
-    async function loginAndDownload() {
-        const username = document.getElementById("username").value;
-        const password = document.getElementById("password").value;
-        const errorMsg = document.getElementById("errorMsg");
-        errorMsg.textContent = "";
-
-        try {
-            const response = await fetch("/login-and-download", {
-                method: "POST",
-                headers: { "Content-Type": "application/json" },
-                body: JSON.stringify({ username, password })
-            });
-
-            if (!response.ok) {
-                throw new Error("Invalid login or server error");
-            }
-
-            const blob = await response.blob();
-            const url = window.URL.createObjectURL(blob);
-
-            const a = document.createElement("a");
-            a.href = url;
-            a.download = "timetable.ics";
-            document.body.appendChild(a);
-            a.click();
-            a.remove();
-
-            window.URL.revokeObjectURL(url);
-
-        } catch (err) {
-            errorMsg.textContent = err.message;
-        }
-    }
-    </script>
-</body>
-</html>

templates/login.jinja

@@ -0,0 +1,16 @@
+{%set page_title = "Login"%}
+{% extends "base.jinja" %}
+{% block body %}
+<form class="login-box" method="POST" action="/login-and-download">
+    <h2>Coventry University Login</h2>
+
+    <input type="text" name="username" placeholder="Username" required>
+
+    <input type="password" name="password" placeholder="Password" required>
+
+    <button type="submit">Login & Download</button>
+
+    <!-- Optional: server can re-render this with an error message -->
+    {% if error|trim %}<div class="error">{{error}}</div>{% endif %}
+</form>
+{% endblock %}