cloud functions code

create.post.fn.js

const admin = require('firebase-admin');

const appConstant = require('../../const');

exports = module.exports = async (req, res) => {
  let response = {};
  try  {
    const db = admin.firestore();
    const postId = uuid4();
    const currentDatetime = new Date();

    await db.collection('post').doc(postId)
    .set({
      id: postId,
      owner: {
        displayName: 'bank'
      },
      subject: req.body.subject,
      body: req.body.content,
      postDatetime: currentDatetime,
      createdBy: 'bank',
      createdDatetime: currentDatetime,
      updatedBy: 'bank',
      updatedDatetime: currentDatetime
    });

    res.json(appConstant.buildServiceSuccess(response));
  } catch (err) {
    console.error(err);
    res.json(appConstant.buildServiceError(err, response));
  }
}

load.get.fn.js

const admin = require('firebase-admin');
const uuid4 = require('uuid/v4');

const appConstant = require('../../const');

exports = module.exports = async (req, res) => {
  let response = {};
  try  {
    const db = admin.firestore();
    const postId = req.query.postId;

    if (!postId || !postId.trim()) {
      throw appConstant.B_ERROR.RequiredPostID();
    }

    const postDoc = await db.collection('post').doc(postId).get();
    const postDocResult =  postDoc.data();

    if (!postDocResult) {
      throw appConstant.B_ERROR.NotFoundPost();
    }

    response.data = {};
    Object.assign(response.data, postDocResult);

    res.json(appConstant.buildServiceSuccess(response));
  } catch (err) {
    console.error(err);
    res.json(appConstant.buildServiceError(err, response));
  }
}