app.py - Main Application Code

from flask import Flask, render_template, request, redirect, url_for
import pandas as pd
import paypalrestsdk
from config import PAYPAL_CLIENT_ID, PAYPAL_CLIENT_SECRET

# Initialize Flask app
app = Flask(__name__)

# Sample data
def generate_sample_data():
    data = {
        "ID": ["USER12345", "USER67890"],
        "Name": ["Alice Johnson", "Bob Smith"],
        "Shelter_Name": ["Hope Shelter", "Safe Haven"],
        "Shelter_Account": ["shelter_acc_1", "shelter_acc_2"],
        "Fund_Amount": [0.0, 0.0],
        "Accommodation_Days": [0, 0]
    }
    return pd.DataFrame(data)

# Initialize data
homeless_data = generate_sample_data()

# Donation function with PayPal integration
def make_donation(id_name, amount):
    if id_name in homeless_data['ID'].values:
        shelter_account = homeless_data.loc[homeless_data['ID'] == id_name, 'Shelter_Account'].values[0]
        
        payment = paypalrestsdk.Payment({
            "intent": "sale",
            "payer": {"payment_method": "paypal"},
            "transactions": [{
                "amount": {"total": f"{amount:.2f}", "currency": "USD"},
                "payee": {"email": f"{shelter_account}@example.com"},
                "description": f"Donation for {id_name} at {shelter_account}"}],
            "redirect_urls": {
                "return_url": "http://127.0.0.1:5000/payment/execute",
                "cancel_url": "http://127.0.0.1:5000/payment/cancel"
            }
        })
        
        if payment.create():
            for link in payment.links:
                if link.rel == "approval_url":
                    return link.href
        else:
            print(payment.error)
    return None

# Execute payment
def execute_payment(payment_id, payer_id):
    payment = paypalrestsdk.Payment.find(payment_id)
    
    if payment.execute({"payer_id": payer_id}):
        amount = float(payment.transactions[0].amount.total)
        id_name = payment.transactions[0].description.split()[2]
        
        cost_per_night = 10.0
        days_covered = int(amount / cost_per_night)
        
        homeless_data.loc[homeless_data['ID'] == id_name, 'Fund_Amount'] += amount
        homeless_data.loc[homeless_data['ID'] == id_name, 'Accommodation_Days'] += days_covered
        
        print(f"Updated Fund Amount and Accommodation Days for {id_name}")
    else:
        print(payment.error)

@app.route("/")
def index():
    return render_template("index.html", data=homeless_data.to_dict(orient="records"))

@app.route("/donate/<id_name>", methods=["GET", "POST"])
def donate(id_name):
    if request.method == "POST":
        amount = float(request.form["amount"])
        approval_url = make_donation(id_name, amount)
        if approval_url:
            return redirect(approval_url)
    return render_template("donate.html", id_name=id_name)

@app.route("/payment/execute")
def execute_payment_route():
    payment_id = request.args.get("paymentId")
    payer_id = request.args.get("PayerID")
    execute_payment(payment_id, payer_id)
    return redirect(url_for("index"))

if __name__ == "__main__":
    app.run(debug=True)