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import { ICommonObject, INode, INodeData, INodeParams } from '../../../src/Interface'
import { getBaseClasses } from '../../../src/utils'
import { ChatPromptTemplate, SystemMessagePromptTemplate, HumanMessagePromptTemplate } from 'langchain/prompts'
class ChatPromptTemplate_Prompts implements INode {
label: string
name: string
description: string
type: string
icon: string
category: string
baseClasses: string[]
inputs: INodeParams[]
constructor() {
this.label = 'Chat Prompt Template'
this.name = 'chatPromptTemplate'
this.type = 'ChatPromptTemplate'
this.icon = 'prompt.svg'
this.category = 'Prompts'
this.description = 'Schema to represent a chat prompt'
this.baseClasses = [this.type, ...getBaseClasses(ChatPromptTemplate)]
this.inputs = [
{
label: 'System Message',
name: 'systemMessagePrompt',
type: 'string',
rows: 4,
placeholder: `You are a helpful assistant that translates {input_language} to {output_language}.`
},
{
label: 'Human Message',
name: 'humanMessagePrompt',
type: 'string',
rows: 4,
placeholder: `{text}`
},
{
label: 'Format Prompt Values',
name: 'promptValues',
type: 'string',
rows: 4,
placeholder: `{
"input_language": "English",
"output_language": "French"
}`,
optional: true,
acceptVariable: true,
list: true
}
]
}
async init(nodeData: INodeData): Promise<any> {
const systemMessagePrompt = nodeData.inputs?.systemMessagePrompt as string
const humanMessagePrompt = nodeData.inputs?.humanMessagePrompt as string
const promptValuesStr = nodeData.inputs?.promptValues as string
const prompt = ChatPromptTemplate.fromPromptMessages([
SystemMessagePromptTemplate.fromTemplate(systemMessagePrompt),
HumanMessagePromptTemplate.fromTemplate(humanMessagePrompt)
])
let promptValues: ICommonObject = {}
if (promptValuesStr) {
promptValues = JSON.parse(promptValuesStr.replace(/\s/g, ''))
}
// @ts-ignore
prompt.promptValues = promptValues
return prompt
}
}
module.exports = { nodeClass: ChatPromptTemplate_Prompts }
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