75 lines
2.4 KiB
TypeScript
75 lines
2.4 KiB
TypeScript
import { ICommonObject, INode, INodeData, INodeParams, PromptTemplate } from '../../../src/Interface'
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import { getBaseClasses, getInputVariables, transformBracesWithColon } from '../../../src/utils'
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import { PromptTemplateInput } from '@langchain/core/prompts'
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class PromptTemplate_Prompts implements INode {
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label: string
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name: string
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version: number
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description: string
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type: string
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icon: string
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category: string
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baseClasses: string[]
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inputs: INodeParams[]
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constructor() {
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this.label = 'Prompt Template'
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this.name = 'promptTemplate'
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this.version = 1.0
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this.type = 'PromptTemplate'
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this.icon = 'prompt.svg'
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this.category = 'Prompts'
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this.description = 'Schema to represent a basic prompt for an LLM'
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this.baseClasses = [...getBaseClasses(PromptTemplate)]
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this.inputs = [
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{
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label: 'Template',
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name: 'template',
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type: 'string',
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rows: 4,
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placeholder: `What is a good name for a company that makes {product}?`
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},
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{
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label: 'Format Prompt Values',
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name: 'promptValues',
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type: 'json',
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optional: true,
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acceptVariable: true,
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list: true
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}
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]
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}
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async init(nodeData: INodeData): Promise<any> {
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let template = nodeData.inputs?.template as string
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const promptValuesStr = nodeData.inputs?.promptValues
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let promptValues: ICommonObject = {}
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if (promptValuesStr) {
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try {
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promptValues = typeof promptValuesStr === 'object' ? promptValuesStr : JSON.parse(promptValuesStr)
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} catch (exception) {
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throw new Error("Invalid JSON in the PromptTemplate's promptValues: " + exception)
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}
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}
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const inputVariables = getInputVariables(template)
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template = transformBracesWithColon(template)
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try {
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const options: PromptTemplateInput = {
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template,
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inputVariables
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}
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const prompt = new PromptTemplate(options)
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prompt.promptValues = promptValues
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return prompt
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} catch (e) {
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throw new Error(e)
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}
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}
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}
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module.exports = { nodeClass: PromptTemplate_Prompts }
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