Seperating mapcompile into files.

tools/mapcompile/inputParser.py

@@ -0,0 +1,32 @@
+import os
+import sys
+import json
+
+def parseInputFile(inputFile):
+  if not os.path.isfile(inputFile):
+    print(f"Error: Input file '{inputFile}' does not exist.")
+    sys.exit(1)
+
+  data = None
+  with open(inputFile, 'r') as f:
+    data = json.load(f)
+
+  # Data should have height key
+  if 'height' not in data or 'width' not in data:
+    print(f"Error: Input file '{inputFile}' does not contain 'height' or 'width' key.")
+    sys.exit(1)
+
+  if 'tilewidth' not in data or 'tileheight' not in data:
+    print(f"Error: Input file '{inputFile}' does not contain 'tilewidth' or 'tileheight' key.")
+    sys.exit(1)
+
+  if 'infinite' not in data or not isinstance(data['infinite'], bool):
+    print(f"Error: Input file '{inputFile}' does not contain 'infinite' key.")
+    sys.exit(1)
+
+  # Need layers
+  if 'layers' not in data or not isinstance(data['layers'], list) or len(data['layers']) == 0:
+    print(f"Error: Input file '{inputFile}' does not contain 'layers' key.")
+    sys.exit(1)
+
+  return data