casibase/embedding/openai.go

// Copyright 2023 The casbin Authors. All Rights Reserved.
//
// 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 embedding

import (
	"context"

	"github.com/casbin/casibase/proxy"
	"github.com/casbin/casibase/util"
	"github.com/sashabaranov/go-openai"
)

type OpenAiEmbeddingProvider struct {
	subType   string
	secretKey string
}

func NewOpenAiEmbeddingProvider(subType string, secretKey string) (*OpenAiEmbeddingProvider, error) {
	return &OpenAiEmbeddingProvider{subType: subType, secretKey: secretKey}, nil
}

func getProxyClientFromToken(authToken string) *openai.Client {
	config := openai.DefaultConfig(authToken)
	config.HTTPClient = proxy.ProxyHttpClient

	c := openai.NewClientWithConfig(config)
	return c
}

func (p *OpenAiEmbeddingProvider) QueryVector(text string, ctx context.Context) ([]float32, error) {
	client := getProxyClientFromToken(p.secretKey)

	resp, err := client.CreateEmbeddings(ctx, openai.EmbeddingRequest{
		Input: []string{text},
		Model: openai.EmbeddingModel(util.ParseInt(p.subType)),
	})
	if err != nil {
		return nil, err
	}

	return resp.Data[0].Embedding, nil
}