langParser.py

from string import ascii_letters, digits
from langEnums import Types, ConditionType, Exceptions

def parse_escape_character(trimmed_string):
	is_escape_char_detected = False
	outstr = ""
	for i in str(trimmed_string):
		outchar = i
		if i == "\\":
			is_escape_char_detected = True
			continue
		if is_escape_char_detected:
			is_escape_char_detected = False
			if i == "n":
				outchar = "\n"
			elif i == "\\":
				outchar = "\\"
			elif i == "t":
				outchar = "\t"
		outstr += outchar
	return outstr

def parse_string_list(command):
	if isinstance(command, str):
		command = [command]
	res = " ".join(command)
	# for i in command:
	#	res += i + " "
	# res = res[:-1]
	return res

def check_is_float(command):
	is_float = False
	if(not isinstance(command, str)):
		command = str(command)
	for i in command:
		for j in i:
			if j == ".":
				is_float = True
				break
	return is_float

def try_parse_int(val):
	try:
		return int(val)
	except ValueError:
		return val

def convert_to_python_native_type(valtype, value):
	"""
	Returns a Converted to Python version of the value provided to a Type specified.
	[PARAMETER] valtype: Target output type
	[PARAMETER] value: The input value that will be converted.
	[RETURNS] a Converted value. Else the input value If the type is not support yet by the Converter.
	"""
	if valtype == Types.Integer:
		return int(value)
	elif valtype == Types.Float:
		return float(value)
	elif value == Types.String:
		return str(value[1:-1])
	elif value == Types.Boolean:
		if value == "true":
			return True
		elif value == "false":
			return False
		else:
			return value
	else: return value

def convert_types_enum_to_string(enumvalue):
	if enumvalue == Types.Integer:
		return "int"
	elif enumvalue == Types.Float:
		return "float"
	elif enumvalue == Types.String:
		return "string"
	elif enumvalue == Types.Boolean:
		return "bool"
	elif enumvalue == Types.Dynamic:
		return "dynamic"
	elif enumvalue == Types.Tuple:
		return "tuple"
	elif enumvalue == Types.List:
		return "list"
	elif enumvalue == Types.Dictionary:
		return "dictionary"

def convert_to_storyscript_native_type(valtype, value):
	"""
	Returns a Converted to StoryScript version of the value provided to a Type specified.
	[PARAMETER] valtype: Target output type
	[PARAMETER] value: The input value that will be converted.
	[RETURNS] a Converted value. Else the input value If the type is not support yet by the Converter.
	"""
	if valtype == Types.Integer:
		return str(value)
	elif valtype == Types.Float:
		return str(value)
	elif value == Types.String:
		return f"\"{value}\""
	elif value == Types.Boolean:
		if value: return "true"
		else: return "false"
	elif value == Types.Dynamic:
		return f"new Dynamic ({value})"
	else: return value

def trim_space(string):
	out_str = ""
	in_string = False
	for i in string:
		if i == "\"":
			if in_string: in_string = False
			else: in_string = True
		if not in_string and i == " ":
			continue
		out_str += i
	return out_str

def parse_type_from_value(value):
	if not isinstance(value, str):
		value = str(value)
	is_float = check_is_float(value)
	if(value.startswith('"') or value.endswith('"')):
		if(not (value.startswith('"') and value.endswith('"'))):
			return Exceptions.InvalidSyntax
		return Types.String
	elif(value == "true" or value == "false"):
		return Types.Boolean
	elif(value.startswith("new List")):
		return Types.List
	elif(value.startswith("new Dictionary")):
		return Types.Dictionary
	elif(value.startswith("new Tuple")):
		return Types.Tuple
	elif(value.startswith("new Dynamic")):
		return Types.Dynamic
	elif(is_float):
		return Types.Float
	elif(not is_float):
		return Types.Integer
	else: return Exceptions.InvalidSyntax

def parse_type_string(string):
	if(string == "bool"):
		return Types.Boolean
	elif(string == "int"):
		return Types.Integer
	elif(string == "float"):
		return Types.Float
	elif(string == "list"):
		return Types.List
	elif(string == "dictionary"):
		return Types.Dictionary
	elif(string == "tuple"):
		return Types.Tuple
	elif(string == "dynamic"):
		return Types.Dynamic
	elif(string == "string"):
		return Types.String
	elif(string == "any"):
		return Types.Any
	else:
		return Exceptions.InvalidSyntax

def check_naming_violation(name):
	""" Returns If the variable naming valid or not """
	if not isinstance(name, str):
		name = str(name)
	if name in ["if", "else", "var", "int",
					"bool", "float", "list", "dictionary",
					"tuple", "const", "override", "func",
					"end", "print", "input", "throw",
					"string", "typeof", "del", "namespace"]:
		return False
	elif name[0] in digits:
		return False
	else: return True

def parse_condition_expression(expr, analyse_command_method):
	""" Parse If the condition is True or False """
	# [:OperatorIndex] = Accessing a Message before the operator
	# [OperatorIndex + 1:] = Accessing a Message after the operator
	operator_index = 0
	compare_operator = {">", "<", "==", "!=", ">=", "<="}
	for i in expr:
		if i in compare_operator:
			break
		operator_index += 1
	resl, error = analyse_command_method(expr[:operator_index]) # Analyse the message on the left
	if error: return resl, error

	resr, error = analyse_command_method(expr[operator_index + 1:]) # Analyse the message on the right
	if error: return resr, error

	# Type conversion
	restype = parse_type_from_value(resl)
	resl = convert_to_python_native_type(restype, resl)
	restype = parse_type_from_value(resr)
	resr = convert_to_python_native_type(restype, resr)

	if expr[operator_index] == "==": # If the operator was ==
		if resl == resr: return True
	elif expr[operator_index] == ">": # If the operator was >
		if resl > resr: return True
	elif expr[operator_index] == "<": # If the operator was <
		if resl < resr: return True
	elif expr[operator_index] == "!=": # If the operator was !=
		if resl != resr: return True
	elif expr[operator_index] == ">=": # If the operator was >=
		if resl >= resr: return True
	elif expr[operator_index] == "<=": # If the operator was <=
		if resl <= resr: return True
	else: return Exceptions.InvalidSyntax

	return False

def parse_conditions(expr):
	""" Separate expressions into a list of conditions """
	conditionslist:list = [] # List of conditions
	conditions:list = [] # List of condition
	condition:list = [] # Condition
	current_condition_type = ConditionType.Single # Current condition type
	for i in expr:
		if i == "and":
			if current_condition_type != ConditionType.Single:
				conditions.append(condition)
				conditions.append(current_condition_type)
				conditionslist.append(conditions)
				conditions = []
				condition = []
			conditions.append(condition)
			condition = []
			current_condition_type = ConditionType.And
			continue
		if i == "or":
			if current_condition_type != ConditionType.Single:
				conditions.append(condition)
				conditions.append(current_condition_type)
				conditionslist.append(conditions)
				conditions = []
				condition = []
			conditions.append(condition)
			condition = []
			current_condition_type = ConditionType.Or
			continue
		if i == "then":
			conditions.append(condition)
			conditions.append(current_condition_type)
			conditionslist.append(conditions)
			conditions = []
			condition = []
			break
		condition.append(i)
	return conditionslist