Feat/model as tool (#2744)

api/core/model_runtime/model_providers/__base/text2img_model.py

@@ -0,0 +1,48 @@
+from abc import abstractmethod
+from typing import IO, Optional
+
+from core.model_runtime.entities.model_entities import ModelType
+from core.model_runtime.model_providers.__base.ai_model import AIModel
+
+
+class Text2ImageModel(AIModel):
+    """
+    Model class for text2img model.
+    """
+    model_type: ModelType = ModelType.TEXT2IMG
+
+    def invoke(self, model: str, credentials: dict, prompt: str, 
+               model_parameters: dict, user: Optional[str] = None) \
+            -> list[IO[bytes]]:
+        """
+        Invoke Text2Image model
+
+        :param model: model name
+        :param credentials: model credentials
+        :param prompt: prompt for image generation
+        :param model_parameters: model parameters
+        :param user: unique user id
+
+        :return: image bytes
+        """
+        try:
+            return self._invoke(model, credentials, prompt, model_parameters, user)
+        except Exception as e:
+            raise self._transform_invoke_error(e)
+
+    @abstractmethod
+    def _invoke(self, model: str, credentials: dict, prompt: str, 
+                model_parameters: dict, user: Optional[str] = None) \
+            -> list[IO[bytes]]:
+        """
+        Invoke Text2Image model
+
+        :param model: model name
+        :param credentials: model credentials
+        :param prompt: prompt for image generation
+        :param model_parameters: model parameters
+        :param user: unique user id
+
+        :return: image bytes
+        """
+        raise NotImplementedError