#!/usr/bin/env python3
from flask import Flask

# Usage: pip3 install flask
#        echo "user@domain some more data" > /tmp/assignments
#        FLASK_APP=fencepost_api.py flask run
#        firefox http://127.0.0.1:5000/has_assignment/name@domain57.org

app = Flask(__name__)

ASSIGNMENTS_FILE = "/tmp/assignments"

def get_copyright_list():
    with open(ASSIGNMENTS_FILE) as assignments:
        for line in assignments:
            yield line.split()[0].lower()

@app.route('/has_assignment/<email_address>')
def check_assignment(email_address):
    return "yes" if email_address.lower() in get_copyright_list() else "no"