import * as mongo from 'mongodb'; import deepcopy = require('deepcopy'); import rap from '@prezzemolo/rap'; import db from '../../db/mongodb'; import { IUser, pack as packUser } from './user'; import { pack as packApp } from './app'; import { pack as packChannel } from './channel'; import Vote from './poll-vote'; import Reaction from './post-reaction'; import { pack as packFile } from './drive-file'; import parse from '../common/text'; const Post = db.get('posts'); export default Post; export function isValidText(text: string): boolean { return text.length <= 1000 && text.trim() != ''; } export type IPost = { _id: mongo.ObjectID; channel_id: mongo.ObjectID; created_at: Date; media_ids: mongo.ObjectID[]; reply_id: mongo.ObjectID; repost_id: mongo.ObjectID; poll: any; // todo text: string; user_id: mongo.ObjectID; app_id: mongo.ObjectID; category: string; is_category_verified: boolean; }; /** * Pack a post for API response * * @param post target * @param me? serializee * @param options? serialize options * @return response */ export const pack = async ( post: string | mongo.ObjectID | IPost, me?: string | mongo.ObjectID | IUser, options?: { detail: boolean } ) => { const opts = options || { detail: true, }; // Me const meId: mongo.ObjectID = me ? mongo.ObjectID.prototype.isPrototypeOf(me) ? me as mongo.ObjectID : typeof me === 'string' ? new mongo.ObjectID(me) : (me as IUser)._id : null; let _post: any; // Populate the post if 'post' is ID if (mongo.ObjectID.prototype.isPrototypeOf(post)) { _post = await Post.findOne({ _id: post }); } else if (typeof post === 'string') { _post = await Post.findOne({ _id: new mongo.ObjectID(post) }); } else { _post = deepcopy(post); } if (!_post) throw 'invalid post arg.'; const id = _post._id; // Rename _id to id _post.id = _post._id; delete _post._id; delete _post.mentions; // Parse text if (_post.text) { _post.ast = parse(_post.text); } // Populate user _post.user = packUser(_post.user_id, meId); // Populate app if (_post.app_id) { _post.app = packApp(_post.app_id); } // Populate channel if (_post.channel_id) { _post.channel = packChannel(_post.channel_id); } // Populate media if (_post.media_ids) { _post.media = Promise.all(_post.media_ids.map(fileId => packFile(fileId) )); } // When requested a detailed post data if (opts.detail) { // Get previous post info _post.prev = (async () => { const prev = await Post.findOne({ user_id: _post.user_id, _id: { $lt: id } }, { fields: { _id: true }, sort: { _id: -1 } }); return prev ? prev._id : null; })(); // Get next post info _post.next = (async () => { const next = await Post.findOne({ user_id: _post.user_id, _id: { $gt: id } }, { fields: { _id: true }, sort: { _id: 1 } }); return next ? next._id : null; })(); if (_post.reply_id) { // Populate reply to post _post.reply = pack(_post.reply_id, meId, { detail: false }); } if (_post.repost_id) { // Populate repost _post.repost = pack(_post.repost_id, meId, { detail: _post.text == null }); } // Poll if (meId && _post.poll) { _post.poll = (async (poll) => { const vote = await Vote .findOne({ user_id: meId, post_id: id }); if (vote != null) { const myChoice = poll.choices .filter(c => c.id == vote.choice)[0]; myChoice.is_voted = true; } return poll; })(_post.poll); } // Fetch my reaction if (meId) { _post.my_reaction = (async () => { const reaction = await Reaction .findOne({ user_id: meId, post_id: id, deleted_at: { $exists: false } }); if (reaction) { return reaction.reaction; } return null; })(); } } // resolve promises in _post object _post = await rap(_post); return _post; };