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openai.ts
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openai.ts
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// Copyright 2023 Lance Developers.
//
// 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.
import { type EmbeddingFunction } from '../index'
import type OpenAI from 'openai'
export class OpenAIEmbeddingFunction implements EmbeddingFunction<string> {
private readonly _openai: OpenAI
private readonly _modelName: string
constructor (sourceColumn: string, openAIKey: string, modelName: string = 'text-embedding-ada-002') {
/**
* @type {import("openai").default}
*/
let Openai
try {
// eslint-disable-next-line @typescript-eslint/no-var-requires
Openai = require('openai')
} catch {
throw new Error('please install openai@^4.24.1 using npm install openai')
}
this.sourceColumn = sourceColumn
const configuration = {
apiKey: openAIKey
}
this._openai = new Openai(configuration)
this._modelName = modelName
}
async embed (data: string[]): Promise<number[][]> {
const response = await this._openai.embeddings.create({
model: this._modelName,
input: data
})
const embeddings: number[][] = []
for (let i = 0; i < response.data.length; i++) {
embeddings.push(response.data[i].embedding)
}
return embeddings
}
sourceColumn: string
}