def checkUrlParameters(inputCurrency, outputCurrency, amount):
"""Checks if the URL parameters are valid and returns currency
three letter code representation and a float amount value"""
Utility.checkArguments(inputCurrency, amount)
inputCurrency = Currencies.getCurrencyCode(inputCurrency)
if None not in outputCurrency:
outputCurrency = [Currencies.getCurrencyCode(outputCurrency[0])]
if None in outputCurrency:
outputCurrency = copy.copy(Currencies.listOfCurrencies)
outputCurrency.remove(inputCurrency)
amount = abs(float(amount))
return {
'input_currency': inputCurrency,
'output_currency': outputCurrency,
'amount': amount
}
def parseArguments() -> dict:
"""Parses the command line arguments"""
conversionAmount = -1
inputCurrency = None
outputCurrencies = [None]
if len(sys.argv) == 1:
print(Utility.help())
sys.exit()
try:
optlist, args = getopt.getopt(
sys.argv[1:], 'h',
['amount=', 'input_currency=', 'output_currency=', 'help'])
except getopt.GetoptError:
raise InvalidArgumentError(
"Oops, it looks like you entered an invalid option.")
if not len(args) == 0:
raise InvalidArgumentError(
"Oops, it looks like you entered an invalid option.")
for option, argument in optlist:
if option in ('-h', '--help'):
print(Utility.help())
sys.exit()
elif option in '--amount':
if conversionAmount is not -1:
raise InvalidArgumentError(
"Please select only one amount, output or input currency."
)
conversionAmount = argument
elif option in '--input_currency':
if inputCurrency is not None:
raise InvalidArgumentError(
"Please select only one amount, output or input currency."
)
inputCurrency = argument
elif option in '--output_currency':
if not None in outputCurrencies:
raise InvalidArgumentError(
"Please select only one amount, output or input currency."
)
outputCurrencies = [argument]
Utility.checkArguments(inputCurrency, conversionAmount)
inputCurrency = Currencies.getCurrencyCode(inputCurrency)
conversionAmount = abs(float(conversionAmount))
if None not in outputCurrencies:
outputCurrencies = [
Currencies.getCurrencyCode(outputCurrencies[0])
]
else:
outputCurrencies = copy.copy(Currencies.listOfCurrencies)
outputCurrencies.remove(inputCurrency)
return {
'amount': conversionAmount,
'input': inputCurrency,
'output': outputCurrencies
}
