ptolemy.py

from flask import Flask, render_template, request
from calculator import *
from sexagesimal import Expression
from utils import Logger

app = Flask(__name__)
app.debug = False
l = Logger('ptol')

@app.route('/', methods=['GET', 'POST'])
def evaluate_query():
    errors = []

    if request.method == 'GET':
        l.l('request.method = GET')
        # If there is no query, display the basic page with instructions
        return render_template('index.html', instructions=True)

    elif request.method == 'POST':
        l.l('request.method = POST')
        # If method = Post, parse the query
        calc = Calculator()

        query_expression, query_errors = Expression.from_string(request.form['query'])
        for x in query_errors:
            errors.append(x)

        q_e_html = query_expression.to_html()

        # TODO: The following is destructive and should not be.
        result, steps, eval_errors = calc.evaluate_expression(query_expression)
        for x in eval_errors:
            errors.append(x)

        if not errors:
            return render_template('index.html', steps=steps, query=q_e_html, result=str(result), warning='', decimal=float(result))
        else:
            return render_template('index.html', errors=errors, instructions=True)

if __name__ == '__main__':
  app.run(port=5000)