server.py

from flask import Flask, request, send_from_directory, make_response
import json
import uuid
from shutil import copyfile

app = Flask(__name__, static_url_path='')

# Main route to display form.html for the root index

@app.route('/')
def index():
  return send_from_directory('.', 'form.html')


# Routes for static resources

@app.route('/js/<path:path>')
def get_js(path):
    return send_from_directory('js', path)

@app.route('/css/<path:path>')
def get_css(path):
    return send_from_directory('css', path)

# Route to retrieve data file
@app.route('/data/<path:path>')
def get_data(path):
    return send_from_directory('data', path)


# HTTP actions for assignment 3

@app.route('/users', methods = ['GET'])
def getUsers():
    with open('data/entries.json', 'r') as f:
        d = json.load(f)
        return(d)

@app.route('/users/', methods = ['GET', 'POST'])
def addUser():
    newId = uuid.uuid4().hex[:6]

    newUser = {
        "id": newId,
        "fullName": request.form.get("fullName"),
        "major": request.form.get("major"),
        "startYear": int(request.form.get("startYear"))
    }

    data = ''
    fileName = 'data/entries.json'
    with open(fileName, 'r') as f:
        # Read the JSON into a variable
        data = json.load(f)

        # Add a new record to the JSON
        data["records"].append(newUser)

    writeToFile(fileName, data)

@app.route('/user/<user_id>', methods = ['GET', 'DELETE'])
def deleteUser(user_id):
    data = ''
    fileName = 'data/entries.json'
    with open(fileName, 'r') as f:
        data = json.load(f)

    # Iterate through records, delete one that matches user id
    for i, record in enumerate(data["records"]):
        if record["id"] == user_id:
            del data["records"][i]

    writeToFile(fileName, data)
    return make_response('', 200)


def writeToFile(filePath, jsonString):
    with open(filePath, 'w') as f:
        # Write the modified list to file
        json.dump(jsonString, f, sort_keys=True, indent=4)

if __name__ == '__main__':
  # If you mess up your data, re-run the container and it will be restored
  copyfile('data/entries_orig.json', 'data/entries.json')

  app.run(host='0.0.0.0', port=8081, debug=True)
      

'''
 Build the Docker image:
   docker image build -t assignment3 .
 Run the Docker image:
   docker run --rm -it --mount src="$(pwd)",target=/app,type=bind -p 8081:8081 assignment3
'''