exports.getItems

gistfile1.txt

exports.getItems = functions.https.onRequest((req, res) => {
  return cors(req, res, () => {
    if(req.method !== 'GET') {
      return res.status(500).json({
        message: 'Not allowed'
      })
    }

    let items = [];

    return database.on('value', (snapshot) => {
      snapshot.forEach((item) => {
        items.push({
          id: item.key,
          items: item.val().item
        });
      });
      
      res.status(200).json(items)
    }, (error) => {
      res.status(500).json({
        message: `Something went wrong. ${error}`
      })
    })
  })
})