86 lines
4.2 KiB
Python
86 lines
4.2 KiB
Python
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import csv
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import os
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from flask import render_template, request, url_for, session, redirect, current_app, send_file
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from flask_login import current_user
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from app.playgrounds import bp
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from app.playgrounds import forms
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from werkzeug.utils import secure_filename
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from app.playgrounds.controller import load_csv_data, compute_risk_pool_assets, _fetch_data_from_fannie, load_default_rate_file, compute_mre
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from datetime import datetime
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# import app.auth.google
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@bp.route('/risk_pool_generator', methods=['GET', 'POST'])
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def generate_risk_pool():
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# _fetch_data_from_fannie(2008)
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form = forms.HpiValuePredictForm(request.form)
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if form.validate_on_submit():
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default_risks_file = form.default_risks.name
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saved_def_risks_file_path = os.path.join(current_app.config['UPLOAD_PATH'],
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f'{secure_filename(default_risks_file)}.csv')
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example_homes_file = form.example_homes.name
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saved_ex_homes_file_path = os.path.join(current_app.config['UPLOAD_PATH'],
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f'{secure_filename(example_homes_file)}.csv')
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pool_makeup_file = form.pool_makeup.name
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saved_makeup_file_path = os.path.join(current_app.config['UPLOAD_PATH'],
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f'{secure_filename(pool_makeup_file)}.csv')
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hpi_accrual_file = form.hpi_accrual_rate.name
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saved_hpi_acc_file_path = os.path.join(current_app.config['UPLOAD_PATH'],
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f'{secure_filename(hpi_accrual_file)}.csv')
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for f in [hpi_accrual_file, pool_makeup_file, example_homes_file, default_risks_file]:
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if not os.path.exists(current_app.config['UPLOAD_PATH']):
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os.makedirs(current_app.config['UPLOAD_PATH'])
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csv_data = request.files[f].read().decode('utf-8').replace('\r', '')
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f = os.path.join(current_app.config['UPLOAD_PATH'], f'{secure_filename(f)}.csv')
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open(f, 'w+').write(csv_data)
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home_data, hpi_accrual_data = load_csv_data(saved_def_risks_file_path, saved_ex_homes_file_path, saved_makeup_file_path, saved_hpi_acc_file_path)
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risk_pool_take = form.risk_pool_take_percent.data
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occupancy_fee_rate = form.tic_fee.data
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rp_asset_liability_data = compute_risk_pool_assets(home_data, hpi_accrual_data, form.number_of_homes.data, risk_pool_take, occupancy_fee_rate)
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time_str = datetime.now().strftime('%Y%m%d_%H%M%S')
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out_file_path = os.path.join(current_app.config['UPLOAD_PATH'], f'Risk_Pool_Data_{time_str}.csv')
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with open(out_file_path, 'w', newline='') as csv_out:
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field_names = ['Time Period', 'Asset Token Value', 'HPI Token Value', 'Cash in Pool', 'Total Pool Assets', 'Pool Liability', 'Ratio', 'Home Count']
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csv_writer = csv.DictWriter(csv_out, fieldnames=field_names)
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csv_writer.writeheader()
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for row in rp_asset_liability_data:
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csv_writer.writerow(row)
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return send_file(os.path.join('..', out_file_path), as_attachment=True)
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return render_template('risk_pool_generator.html', form=form)
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@bp.route('/mre', methods=['GET', 'POST'])
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def mre_playground():
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form = forms.MREForm(request.form)
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if form.validate_on_submit():
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# save the uploaded default rate file
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default_risks_file = form.default_rates.name
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saved_def_risks_file_path = os.path.join(current_app.config['UPLOAD_PATH'],
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f'{secure_filename(default_risks_file)}.csv')
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csv_data = request.files[default_risks_file].read().decode('utf-8').replace('\r', '')
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f = os.path.join(current_app.config['UPLOAD_PATH'], f'{secure_filename(default_risks_file)}.csv')
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open(f, 'w+').write(csv_data)
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default_data = load_default_rate_file(saved_def_risks_file_path)
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mre = compute_mre({}, form.occupant_income.data, form.occupant_fico.data, form.home_price.data, default_data)
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return render_template('mre_generator.html', form=form, mre=f'{mre * 100:.2f}%')
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return render_template('mre_generator.html', form=form, mre=None)
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