refactor: app design concept (#305)

embedchain/config/apps/BaseAppConfig.py

@@ -0,0 +1,53 @@
+import logging
+
+from embedchain.config.BaseConfig import BaseConfig
+
+
+class BaseAppConfig(BaseConfig):
+    """
+    Parent config to initialize an instance of `App`, `OpenSourceApp` or `CustomApp`.
+    """
+
+    def __init__(self, log_level=None, ef=None, db=None, host=None, port=None, id=None):
+        """
+        :param log_level: Optional. (String) Debug level
+        ['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL'].
+        :param ef: Embedding function to use.
+        :param db: Optional. (Vector) database instance to use for embeddings.
+        :param id: Optional. ID of the app. Document metadata will have this id.
+        :param host: Optional. Hostname for the database server.
+        :param port: Optional. Port for the database server.
+        """
+        self._setup_logging(log_level)
+
+        self.db = db if db else BaseAppConfig.default_db(ef=ef, host=host, port=port)
+        self.id = id
+        return
+
+    @staticmethod
+    def default_db(ef, host, port):
+        """
+        Sets database to default (`ChromaDb`).
+
+        :param ef: Embedding function to use in database.
+        :param host: Optional. Hostname for the database server.
+        :param port: Optional. Port for the database server.
+        :returns: Default database
+        :raises ValueError: BaseAppConfig knows no default embedding function.
+        """
+        if ef is None:
+            raise ValueError("ChromaDb cannot be instantiated without an embedding function")
+        from embedchain.vectordb.chroma_db import ChromaDB
+
+        return ChromaDB(ef=ef, host=host, port=port)
+
+    def _setup_logging(self, debug_level):
+        level = logging.WARNING  # Default level
+        if debug_level is not None:
+            level = getattr(logging, debug_level.upper(), None)
+            if not isinstance(level, int):
+                raise ValueError(f"Invalid log level: {debug_level}")
+
+        logging.basicConfig(format="%(asctime)s [%(name)s] [%(levelname)s] %(message)s", level=level)
+        self.logger = logging.getLogger(__name__)
+        return