Add chromadb based vector store impl and test case

src/aios_kernel/knowledge_base.py

@@ -0,0 +1,48 @@
+# define a knowledge base class
+from . import AgentPrompt, ComputeKernel
+from ..knowledge.object import KnowledgeObject, ObjectType, EmailObject, TextChunkObject, ImageObject
+from ..knowledge.object_storage import ObjectStorage
+from ..knowledge.vector.vector_base import VectorBase
+
+class KnowledgeBase:
+    def __init__(self) -> None:
+        self.object_store = ObjectStorage()
+        self.vector_base = VectorBase()
+        self.compute_kernel = ComputeKernel()
+
+    async def insert(self, object: KnowledgeObject):
+        if object.object_type == ObjectType.Email:
+            email: EmailObject = object
+            for text_id in email.text:
+                [text, _] = self.object_store.get(text_id)
+                text: TextChunkObject = text
+                vector = await self.compute_kernel.do_text_embedding(text.text)
+                self.vector_base.insert(vector, text_id)
+            
+            for image_id in email.images:
+                [image, _] = self.object_store.get(image_id)
+                image: ImageObject = image
+                vector = await self.compute_kernel.do_text_embedding(image.meta)
+                self.vector_base.insert(vector, image_id)
+            
+            vector = await self.compute_kernel.do_text_embedding(email.meta)
+            self.vector_base.insert(vector, email.get_id())
+        else:
+            pass
+
+    async def query(self, prompt: AgentPrompt) -> AgentPrompt:
+        for msg in prompt.messages:
+            if msg.role == "user":
+                vector = await self.compute_kernel.do_text_embedding(msg.content)
+                object_ids = self.vector_base.query(vector, 10)
+                for object_id in object_ids:
+                    if object_id.object_type == ObjectType.Email:
+                        [object, email] = self.object_store.get(object_id)
+                        if object.object_type == ObjectType.Email:
+                            email: EmailObject = object
+                            prompt.append(AgentPrompt())
+                            prompt
+                    
+                
+
+