Add component for Anthropic (#3564)

Signed-off-by: yaron2 <[email protected]>

conversation/anthropic/anthropic.go

@@ -0,0 +1,118 @@
+/*
+Copyright 2024 The Dapr Authors
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package anthropic
+
+import (
+	"context"
+	"reflect"
+
+	"github.com/dapr/components-contrib/conversation"
+	"github.com/dapr/components-contrib/metadata"
+	"github.com/dapr/kit/logger"
+	kmeta "github.com/dapr/kit/metadata"
+
+	"github.com/tmc/langchaingo/llms"
+	"github.com/tmc/langchaingo/llms/anthropic"
+)
+
+type Anthropic struct {
+	llm *anthropic.LLM
+
+	logger logger.Logger
+}
+
+type AnthropicMetadata struct {
+	Key   string `json:"key"`
+	Model string `json:"model"`
+}
+
+func NewAnthropic(logger logger.Logger) conversation.Conversation {
+	a := &Anthropic{
+		logger: logger,
+	}
+
+	return a
+}
+
+const defaultModel = "claude-3-5-sonnet-20240620"
+
+func (a *Anthropic) Init(ctx context.Context, meta conversation.Metadata) error {
+	m := AnthropicMetadata{}
+	err := kmeta.DecodeMetadata(meta.Properties, &m)
+	if err != nil {
+		return err
+	}
+
+	model := defaultModel
+	if m.Model != "" {
+		model = m.Model
+	}
+
+	llm, err := anthropic.New(
+		anthropic.WithModel(model),
+		anthropic.WithToken(m.Key),
+	)
+	if err != nil {
+		return err
+	}
+
+	a.llm = llm
+	return nil
+}
+
+func (a *Anthropic) GetComponentMetadata() (metadataInfo metadata.MetadataMap) {
+	metadataStruct := AnthropicMetadata{}
+	metadata.GetMetadataInfoFromStructType(reflect.TypeOf(metadataStruct), &metadataInfo, metadata.ConversationType)
+	return
+}
+
+func (a *Anthropic) Converse(ctx context.Context, r *conversation.ConversationRequest) (res *conversation.ConversationResponse, err error) {
+	messages := make([]llms.MessageContent, 0, len(r.Inputs))
+
+	for _, input := range r.Inputs {
+		role := conversation.ConvertLangchainRole(input.Role)
+
+		messages = append(messages, llms.MessageContent{
+			Role: role,
+			Parts: []llms.ContentPart{
+				llms.TextPart(input.Message),
+			},
+		})
+	}
+
+	resp, err := a.llm.GenerateContent(ctx, messages)
+	if err != nil {
+		return nil, err
+	}
+
+	outputs := make([]conversation.ConversationResult, 0, len(resp.Choices))
+
+	for i := range resp.Choices {
+		outputs = append(outputs, conversation.ConversationResult{
+			Result:     resp.Choices[i].Content,
+			Parameters: r.Parameters,
+		})
+	}
+
+	res = &conversation.ConversationResponse{
+		Outputs: outputs,
+	}
+
+	return res, nil
+}
+
+func (a *Anthropic) Close() error {
+	return nil
+}

conversation/anthropic/metadata.yaml

@@ -0,0 +1,29 @@
+# yaml-language-server: $schema=../../../component-metadata-schema.json
+schemaVersion: v1
+type: conversation
+name: anthropic
+version: v1
+status: alpha
+title: "Anthropic"
+urls:
+  - title: Reference
+    url: https://docs.dapr.io/reference/components-reference/supported-conversation/setup-anthropic/
+authenticationProfiles:
+  - title: "API Key"
+    description: "Authenticate using an API key"
+    metadata:
+      - name: key
+        type: string
+        required: true
+        sensitive: true
+        description: |
+          API key for Anthropic.
+        example:  "**********"
+        default: ""
+metadata:
+  - name: model
+    required: false
+    description: |
+      The Anthropic LLM to use. Defaults to claude-3-5-sonnet-20240620
+    type: string
+    example: 'claude-3-5-sonnet-20240620'

conversation/aws/bedrock/bedrock.go

@@ -53,23 +53,6 @@ func NewAWSBedrock(logger logger.Logger) conversation.Conversation {
 	return b
 }
 
-func convertRole(role conversation.Role) llms.ChatMessageType {
-	switch role {
-	case conversation.RoleSystem:
-		return llms.ChatMessageTypeSystem
-	case conversation.RoleUser:
-		return llms.ChatMessageTypeHuman
-	case conversation.RoleAssistant:
-		return llms.ChatMessageTypeAI
-	case conversation.RoleTool:
-		return llms.ChatMessageTypeTool
-	case conversation.RoleFunction:
-		return llms.ChatMessageTypeFunction
-	default:
-		return llms.ChatMessageTypeHuman
-	}
-}
-
 func (b *AWSBedrock) Init(ctx context.Context, meta conversation.Metadata) error {
 	m := AWSBedrockMetadata{}
 	err := kmeta.DecodeMetadata(meta.Properties, &m)
@@ -111,7 +94,7 @@ func (b *AWSBedrock) Converse(ctx context.Context, r *conversation.ConversationR
 	messages := make([]llms.MessageContent, 0, len(r.Inputs))
 
 	for _, input := range r.Inputs {
-		role := convertRole(input.Role)
+		role := conversation.ConvertLangchainRole(input.Role)
 
 		messages = append(messages, llms.MessageContent{
 			Role: role,

conversation/langchainroles.go

@@ -0,0 +1,34 @@
+/*
+Copyright 2024 The Dapr Authors
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+package conversation
+
+import "github.com/tmc/langchaingo/llms"
+
+func ConvertLangchainRole(role Role) llms.ChatMessageType {
+	switch role {
+	case RoleSystem:
+		return llms.ChatMessageTypeSystem
+	case RoleUser:
+		return llms.ChatMessageTypeHuman
+	case RoleAssistant:
+		return llms.ChatMessageTypeAI
+	case RoleTool:
+		return llms.ChatMessageTypeTool
+	case RoleFunction:
+		return llms.ChatMessageTypeFunction
+	default:
+		return llms.ChatMessageTypeHuman
+	}
+}

conversation/langchainroles_test.go

@@ -0,0 +1,39 @@
+/*
+Copyright 2024 The Dapr Authors
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+	http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package conversation
+
+import (
+	"testing"
+
+	"github.com/tmc/langchaingo/llms"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestConvertLangchainRole(t *testing.T) {
+	roles := map[string]string{
+		RoleSystem:    string(llms.ChatMessageTypeSystem),
+		RoleAssistant: string(llms.ChatMessageTypeAI),
+		RoleFunction:  string(llms.ChatMessageTypeFunction),
+		RoleUser:      string(llms.ChatMessageTypeHuman),
+		RoleTool:      string(llms.ChatMessageTypeTool),
+	}
+
+	for k, v := range roles {
+		r := ConvertLangchainRole(Role(k))
+		assert.Equal(t, v, string(r))
+	}
+}