76 lines
2.3 KiB
JavaScript
76 lines
2.3 KiB
JavaScript
const { parseLemonadeServerEndpoint } = require("../../AiProviders/lemonade");
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const { toChunks, reportEmbeddingProgress } = require("../../helpers");
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class LemonadeEmbedder {
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constructor() {
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if (!process.env.EMBEDDING_BASE_PATH)
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throw new Error("No Lemonade API Base Path was set.");
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if (!process.env.EMBEDDING_MODEL_PREF)
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throw new Error("No Embedding Model Pref was set.");
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this.className = "LemonadeEmbedder";
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const { OpenAI: OpenAIApi } = require("openai");
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this.lemonade = new OpenAIApi({
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baseURL: parseLemonadeServerEndpoint(
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process.env.EMBEDDING_BASE_PATH,
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"openai"
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),
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apiKey: process.env.LEMONADE_LLM_API_KEY || null,
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});
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this.model = process.env.EMBEDDING_MODEL_PREF;
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this.maxConcurrentChunks = 50;
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this.embeddingMaxChunkLength =
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process.env.EMBEDDING_MODEL_MAX_CHUNK_LENGTH || 8_191;
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}
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log(text, ...args) {
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console.log(`\x1b[36m[${this.className}]\x1b[0m ${text}`, ...args);
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}
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async embedTextInput(textInput) {
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try {
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this.log(`Embedding text input...`);
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const response = await this.lemonade.embeddings.create({
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model: this.model,
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input: textInput,
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});
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return response?.data[0]?.embedding || [];
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} catch (error) {
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this.log("Failed to get embedding from Lemonade.", error.message);
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throw error;
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}
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}
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async embedChunks(textChunks = []) {
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this.log(
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`Embedding ${textChunks.length} chunks of text with ${this.model}.`
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);
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const allResults = [];
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for (const chunk of toChunks(textChunks, this.maxConcurrentChunks)) {
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try {
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const response = await this.lemonade.embeddings.create({
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model: this.model,
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input: chunk,
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});
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const embeddings = response?.data?.map((emb) => emb.embedding) || [];
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if (embeddings.length === 0)
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throw new Error("Lemonade returned empty embeddings for batch");
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allResults.push(...embeddings);
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reportEmbeddingProgress(allResults.length, textChunks.length);
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} catch (error) {
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this.log("Failed to get embeddings from Lemonade.", error.message);
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throw new Error(`Lemonade Failed to embed: ${error.message}`);
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}
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}
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return allResults.length > 0 ? allResults : null;
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}
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}
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module.exports = {
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LemonadeEmbedder,
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};
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