(feat): Initial work of admin panel

app.py

@@ -0,0 +1,72 @@
+import os
+import sqlite3
+import smtplib
+from email.mime.text import MIMEText
+from flask import Flask, render_template, request, redirect, url_for, flash
+from dotenv import load_dotenv
+
+load_dotenv()
+app = Flask(__name__)
+
+app.secret_key = os.getenv('SECRET_KEY')
+
+DATABASE_URL = os.getenv('DATABASE_URL')
+SMTP_SERVER = os.getenv('SMTP_SERVER')
+SMTP_PORT = int(os.getenv("SMTP_PORT", 465))
+SMTP_USER = os.getenv('SMTP_USER')
+SMTP_PASSWORD = os.getenv('SMTP_PASSWORD')
+
+def get_all_emails():
+    """Retrieve all subscriber emails from the database"""
+    try:
+        conn = sqlite3.connect(DATABASE_URL)
+        cursor = conn.cursor()
+        cursor.execute('SELECT email FROM subscribers')
+        results = cursor.fetchall()
+        conn.close()
+        return [row[0] for row in results]
+    except Exception as e:
+        print(f"Error: {e}")
+        return []
+
+def send_update_email(subject, body):
+    """Send an update email"""
+    subscribers = get_all_emails()
+    if not subscribers:
+        return "No subscribers found"
+    try:
+        server = smtplib.SMTP(SMTP_SERVER, SMTP_PORT, timeout=10)
+        server.set_debuglevel(True)
+        server.login(SMTP_USER, SMTP_PASSWORD)
+        for email in subscribers:
+            msg = MIMEText(body, 'html', 'utf-8')
+            msg['Subject'] = subject
+            msg['From'] = SMTP_USER
+            msg['To'] = email
+            server.sendmail(SMTP_USER, email, msg.as_string())
+            print(f"Updated email for {email} has been sent.")
+        server.quit()
+        return "Email has been sent."
+    except Exception as e:
+        print(f"Failed to send email: {e}")
+        return f"Failed to send email: {e}"
+
+@app.route('/')
+def index():
+    """Displays all subscriber emails"""
+    emails = get_all_emails()
+    return render_template("admin_index.html", emails=emails)
+
+@app.route('/send_update_email', methods=['GET', 'POST'])
+def send_update_email():
+    """Display a form to send an update email"""
+    if request.method == 'POST':
+        subject = request.form['subject']
+        body = request.form['body']
+        result_message = send_update_email(subject, body)
+        flash(result_message)
+        return redirect(url_for("send_update_email"))
+    return render_template("send_update.html")
+
+if __name__ == '__main__':
+    app.run(port=5001, debug=True)