added mig_meow rule creation

patterns/file_event_pattern.py

@@ -0,0 +1,44 @@
+
+from typing import Any
+
+from core.correctness.validation import check_input, valid_string, valid_dict
+from core.correctness.vars import VALID_RECIPE_NAME_CHARS, \
+    VALID_VARIABLE_NAME_CHARS
+from core.meow import BasePattern
+
+class FileEventPattern(BasePattern):
+    triggering_path:str
+    triggering_file:str
+
+    def __init__(self, name:str, triggering_path:str, recipe:str, 
+            triggering_file:str, parameters:dict[str,Any]={}, 
+            outputs:dict[str,Any]={}):
+        super().__init__(name, recipe, parameters, outputs)
+        self._is_valid_triggering_path(triggering_path)
+        self.triggering_path = triggering_path
+        self._is_valid_triggering_file(triggering_file)
+        self.triggering_file = triggering_file
+
+    def _is_valid_recipe(self, recipe:str)->None:
+        valid_string(recipe, VALID_RECIPE_NAME_CHARS)
+
+    def _is_valid_triggering_path(self, triggering_path:str)->None:
+        check_input(triggering_path, str)
+        if len(triggering_path) < 1:
+            raise ValueError (
+                f"trigginering path '{triggering_path}' is too short. " 
+                "Minimum length is 1"
+        )
+
+    def _is_valid_triggering_file(self, triggering_file:str)->None:
+        valid_string(triggering_file, VALID_VARIABLE_NAME_CHARS)
+
+    def _is_valid_parameters(self, parameters:dict[str,Any])->None:
+        valid_dict(parameters, str, Any, strict=False)
+        for k in parameters.keys():
+            valid_string(k, VALID_VARIABLE_NAME_CHARS)
+
+    def _is_valid_output(self, outputs:dict[str,str])->None:
+        valid_dict(outputs, str, str, strict=False)
+        for k in outputs.keys():
+            valid_string(k, VALID_VARIABLE_NAME_CHARS)