router.js

const keywords = {

    image:[
        "draw","image","picture","paint","generate image","photo"
    ],

    translation:[
        "translate","translation","convert language"
    ],

    summary:[
        "summarize","summary","shorten"
    ],

    caption:[
        "describe image","caption"
    ]

};

function detectTask(prompt){

    prompt = prompt.toLowerCase();

    for(let task in keywords){

        for(let word of keywords[task]){

            if(prompt.includes(word)){

                return task;

            }

        }

    }

    return "text";

}