(feat): Added email sending and remove_emails function

server.py

@@ -1,11 +1,41 @@
-# noinspection PyPackageRequirements
+import os
+import smtplib
+from email.mime.text import MIMEText
 from flask import Flask, render_template, request, jsonify
+from database import init_db, add_email, remove_email
+from dotenv import load_dotenv
 
-from database import init_db, add_email
-
+load_dotenv()
 app = Flask(__name__)
 init_db()
 
+def send_confirmation_email(email):
+    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')
+
+    # Create the message for the
+    unsubscribe_link = f"{request.url_root}unsubscribe?email={email}"
+    subject = 'Thanks for subscribing!'
+    body = ("Thanks for subscribing!\n\n"
+            "We're excited to share our journey with you.\n\n"
+            f"If you ever wish to unsubscribe, please click <a href='{unsubscribe_link}'>here</a>."
+    )
+
+    msg = MIMEText(body, 'html', 'utf-8')
+    msg['Subject'] = subject
+    msg['From'] = SMTP_USER
+    msg['To'] = email
+
+    try:
+        server = smtplib.SMTP_SSL(SMTP_SERVER, SMTP_PORT, timeout=10)
+        server.login(SMTP_USER, SMTP_PASSWORD)
+        server.sendmail(SMTP_USER, email, msg.as_string())
+        server.quit()
+    except Exception as e:
+        print(f"Failed to send email to {email}: {e}")
+
 @app.route("/")
 def index():
     return render_template("index.html")
@@ -18,9 +48,21 @@ def subscribe():
         return jsonify({"error": "No email provided"}), 400
 
     if add_email(email):
+        send_confirmation_email(email)
         return jsonify({"message": "Email has been added"}), 201
     else:
         return jsonify({"error": "Email already exists"}), 400
 
+@app.route("/unsubscribe", methods=["GET"])
+def unsubscribe():
+    email = request.args.get("email")
+    if not email:
+        return "No email specified.", 400
+
+    if remove_email(email):
+        return f"The email {email} has been unsubscribed.", 200
+    else:
+        return f"Email {email} was not found or has already been unsubscribed.", 400
+
 if __name__ == "__main__":
     app.run(debug=True)