ask-question-to-docs-with-gemini.gs

// Context of this Gist in Medium : https://medium.com/@stephane.giron/discuss-with-your-google-docs-with-google-apps-script-and-gemini-1-5-flash-7f80abef8cb2
// This is implemented in our Google Workspace Add-on onleeAssistant : https://assistant.onlee.xyz/

const API_KEY = '';
const QUESTION = '';  
const DOC_ID = '';

function discussWithGoogleDocs() {
  let doc_content = DocumentApp.openById(DOC_ID).getBody().getText();
  let body ={ contents:[
    {"role": "user","parts": [{ "text":QUESTION } ]}
    ],
  systemInstruction :{"role": "user","parts": [{"text": doc_content}]},
  generationConfig: {
    "temperature": 0.2,
    "maxOutputTokens": 4000,
    "responseMimeType": "text/plain"
  }};
  console.log(JSON.stringify(body));
  const url = 'https://generativelanguage.googleapis.com/v1beta/models/gemini-1.5-flash:generateContent?key='+API_KEY;

  const params = {
    method      : "POST",
    contentType: 'application/json',
    payload : JSON.stringify(body),
    muteHttpExceptions :true
  };

  const req = UrlFetchApp.fetch(url,params);
  // console.log(req.getContentText())
  if(req.getResponseCode() == 200){
    let rep = JSON.parse(req.getContentText());
    // let last = rep.contents.pop();
    console.log('/* Gemini answer */') 
    console.log(rep.candidates[0].content.parts[0].text)
  }else{
    console.log('Error : '+JSON.parse(req.getContentText()).error.message)
  }
}