added support for json schemas

schema.py

@@ -1,18 +1,36 @@
+import json
+import os
 import yaml
 
 from config import Config
 from renderer import Renderer
 from structure import Structure
 
+class UnsupportedFormatException(Exception):
+    ...
+
 class InstructionSetSchema:
+    VALID_EXTENSIONS = ("yaml", "json")
+    
     def __init__(self, path: str, configPath: str = "config.json") -> None:
         self.config = Config(configPath)
         self.path = path
         self.load()
     
     def load(self) -> None:
+        _, ext = os.path.splitext(self.path)
+        ext = ext[1:].lower()
+        
+        if ext not in InstructionSetSchema.VALID_EXTENSIONS:
+            fmts = tuple(map(lambda fmt: f".{fmt}", InstructionSetSchema.VALID_EXTENSIONS))
+            raise UnsupportedFormatException(f"'.{ext}' files are not supported. Valid formats: {fmts}")
+        
         with open(self.path, "r") as f:
-            schema = yaml.safe_load(f)
+            if ext == "yaml":
+                schema = yaml.safe_load(f)
+        
+            elif ext == "json":
+                schema = json.load(f)
 
         self.structures = {}