provide automagic command line splitting with quote support

lib/mbs/framework/REPLApplication.py

@@ -2,29 +2,98 @@ from .ConsoleApplication import ConsoleApplication
 
 class REPLApplication (ConsoleApplication):
 
+	def split_with_quotes(self, value : str):
+
+		escaping = False
+		in_quote = 0
+		next = ""
+		retval = [ ]
+		quote_types = [ ]
+
+		for i in range(0, len(value)):
+			if value[i] == "\"" and not escaping:
+				if in_quote == 0:
+					in_quote = 1
+					continue
+				elif in_quote == 1:
+					in_quote = 0
+
+					quote_types.append(1)
+					retval.append(next)
+					next = ""
+					continue
+
+			elif value[i] == "'" and not escaping:
+				if in_quote == 0:
+					in_quote = 2
+					continue
+				elif in_quote == 2:
+					in_quote = 0
+
+					quote_types.append(2)
+					retval.append(next)
+					next = ""
+					continue
+
+			elif value[i] == "`" and not escaping:
+				if in_quote == 0:
+					in_quote = 3
+					continue
+				elif in_quote == 3:
+					in_quote = 0
+					
+					quote_types.append(3)
+					retval.append(next)
+					next = ""
+					continue
+
+			elif value[i] == "\\" and not escaping:
+				escaping = True
+				continue
+
+			elif value[i] == " " and in_quote == 0:
+				if not next == "":
+					quote_types.append(None)
+					retval.append(next)
+					
+				next = ""
+				escaping = False
+				continue
+
+			next += value[i]
+			escaping = False
+
+		if not next == "":
+			quote_types.append(None)
+			retval.append(next)
+			next = ""
+
+		return (retval, quote_types)
+
 	def _start_internal(self):
 		
 		while (True):
 			# print ("open    instance    attribute    relationship    close")
-			inp = input(self.get_prompt())
+			input_str = input(self.get_prompt())
+			(inp, quotes) = self.split_with_quotes(input_str)
 
-			if inp == "clear":
+			if inp[0] == "clear":
 				self.clear()
 				continue
 			
-			elif inp == "exit":
+			elif inp[0] == "exit":
 				break
 
-			elif inp == "help":
+			elif inp[0] == "help":
 				
 				continue
 
-			self.process_input(inp)
+			self.process_input(inp, quotes)
 
 		exit(0)
 
 	def get_prompt(self):
 		return "> "
 
-	def process_input(self, value):
+	def process_input(self, value, quotes):
 		pass