dtp-social/app/controllers/post.js

// post.js
// Copyright (C) 2022 DTP Technologies, LLC
// License: Apache-2.0

'use strict';

const express = require('express');
const multer = require('multer');

const { SiteController } = require('../../lib/site-lib');

class PostController extends SiteController {

  constructor (dtp) {
    super(dtp, module.exports);
  }

  async start ( ) {
    const { dtp } = this;
    const { limiter: limiterService } = dtp.services;

    const upload = multer({ dest:  `/tmp/${this.dtp.config.site.domainKey}/uploads/${module.exports.slug}`});

    const router = express.Router();
    dtp.app.use('/post', router);

    router.use(async (req, res, next) => {
      res.locals.currentView = 'post';

      /*
       * TODO: H1V3 authentication before processing request (HTTP Bearer token)
       */

      return next();
    });

    router.post(
      '/post',
      limiterService.create(limiterService.config.post.postCreate),
      upload.none(),
      this.postCreate.bind(this),
    );

    router.get('/', this.getPostHome.bind(this));

    return router;
  }

  async postCreate (req, res, next) {
    const { post: postService } = this.dtp.services;
    try {
      const displayList = this.createDisplayList('post-create');

      res.locals.post = await postService.createPost(req.user, req.body);

      let viewModel = Object.assign({ }, this.dtp.app.locals);
      viewModel = Object.assign(viewModel, res.locals);
      const postHtml = postService.renderPost(viewModel);

      displayList.addElement('#dtp-post-list', 'afterBegin', postHtml);
      displayList.setInputValue('#post-composer #content', '');

      res.status(200).json({
        success: true,
        post: res.locals.post,
        displayList,
      });
    } catch (error) {
      this.log.error('failed to create new post', { error });
      return next(error);
    }
  }

  async getTimeline (req, res, next) {
    const { post: postService } = this.dtp.services;
    try {
      res.locals.postView = 'timeline';
      res.locals.pagination = this.getPaginationParameters(req, 20);
      res.locals.posts = await postService.getHomeTimeline(req.user, res.locals.pagination);
    } catch (error) {
      this.log.error('failed to retrieve  timeline', { error });
      return next(error);
    }
  }

  async getPostHome (req, res) {
    res.locals.postView = 'home';
    res.render('post/index');
  }
}

module.exports = {
  slug: 'post',
  name: 'post',
  create: async (dtp) => { return new PostController(dtp); },
};