def checkInput():
"""Check if user input is valid"""
cnyFrom = request.form['cnyFrom'].upper()
session['from'] = cnyFrom
cnyTo = request.form['cnyTo'].upper()
session['to'] = cnyTo
amount = request.form['amount']
session['amount'] = amount
convert = Conversion(cnyFrom, cnyTo, amount)
# Check if user input is valid
isValid = convert.checkCurrency()
if (isValid == "Invalid from"):
flash(f"Currency from not a valid code: {cnyFrom}", "error")
return redirect('/')
elif (isValid == "Invalid to"):
flash(f"Currency to not a valid code: {cnyTo}", "error")
return redirect('/')
elif (isValid == 'Invalid amount'):
flash("Invalid amount", "error")
return redirect('/')
else:
return redirect('/convert')
def convert():
"""Returns the conversion value"""
convert = Conversion(session['from'], session['to'], session['amount'])
val = convert.convertCurrency()
return render_template("conversion.html", val=val)
