agsamantha/node_modules/langchain/dist/schema/prompt_template.cjs
2024-10-02 15:15:21 -05:00

34 lines
1.4 KiB
JavaScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.formatDocument = void 0;
/**
* @deprecated
* Formats a document using a given prompt template.
*
* @async
* @param {Document} document - The document to format.
* @param {BasePromptTemplate} prompt - The prompt template to use for formatting.
* @returns {Promise<string>} A Promise that resolves to the formatted document as a string.
* @throws {Error} If the document is missing required metadata variables specified in the prompt template.
*/
const formatDocument = async (document, prompt) => {
const baseInfo = {
pageContent: document.pageContent,
...document.metadata,
};
const variables = new Set(prompt.inputVariables);
const requiredMetadata = new Set(prompt.inputVariables
.map((v) => (v !== "pageContent" ? v : null))
.filter((v) => v !== null));
const missingMetadata = [];
for (const variable of variables) {
if (!(variable in baseInfo) && variable !== "pageContent") {
missingMetadata.push(variable);
}
}
if (missingMetadata.length) {
throw new Error(`Document prompt requires documents to have metadata variables: ${JSON.stringify(requiredMetadata)}. Received document with missing metadata: ${JSON.stringify(missingMetadata)}`);
}
return prompt.format(baseInfo);
};
exports.formatDocument = formatDocument;