feat: auto rule generator (#273)

api/core/prompt/output_parser/rule_config_generator.py

@@ -0,0 +1,32 @@
+from typing import Any
+
+from langchain.schema import BaseOutputParser, OutputParserException
+from core.prompt.prompts import RULE_CONFIG_GENERATE_TEMPLATE
+from libs.json_in_md_parser import parse_and_check_json_markdown
+
+
+class RuleConfigGeneratorOutputParser(BaseOutputParser):
+
+    def get_format_instructions(self) -> str:
+        return RULE_CONFIG_GENERATE_TEMPLATE
+
+    def parse(self, text: str) -> Any:
+        try:
+            expected_keys = ["prompt", "variables", "opening_statement"]
+            parsed = parse_and_check_json_markdown(text, expected_keys)
+            if not isinstance(parsed["prompt"], str):
+                raise ValueError("Expected 'prompt' to be a string.")
+            if not isinstance(parsed["variables"], list):
+                raise ValueError(
+                    f"Expected 'variables' to be a list."
+                )
+            if not isinstance(parsed["opening_statement"], str):
+                raise ValueError(
+                    f"Expected 'opening_statement' to be a str."
+                )
+            return parsed
+        except Exception as e:
+            raise OutputParserException(
+                f"Parsing text\n{text}\n of rule config generator raised following error:\n{e}"
+            )
+