refactor: app design concept (#305)

embedchain/config/apps/AppConfig.py

@@ -0,0 +1,38 @@
+import os
+
+from chromadb.utils import embedding_functions
+
+from .BaseAppConfig import BaseAppConfig
+
+
+class AppConfig(BaseAppConfig):
+    """
+    Config to initialize an embedchain custom `App` instance, with extra config options.
+    """
+
+    def __init__(self, log_level=None, host=None, port=None, id=None):
+        """
+        :param log_level: Optional. (String) Debug level
+        ['DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL'].
+        :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.
+        """
+        super().__init__(log_level=log_level, ef=AppConfig.default_embedding_function(), host=host, port=port, id=id)
+
+    @staticmethod
+    def default_embedding_function():
+        """
+        Sets embedding function to default (`text-embedding-ada-002`).
+
+        :raises ValueError: If the template is not valid as template should contain
+        $context and $query
+        :returns: The default embedding function for the app class.
+        """
+        if os.getenv("OPENAI_API_KEY") is None and os.getenv("OPENAI_ORGANIZATION") is None:
+            raise ValueError("OPENAI_API_KEY or OPENAI_ORGANIZATION environment variables not provided")  # noqa:E501
+        return embedding_functions.OpenAIEmbeddingFunction(
+            api_key=os.getenv("OPENAI_API_KEY"),
+            organization_id=os.getenv("OPENAI_ORGANIZATION"),
+            model_name="text-embedding-ada-002",
+        )