rudeshark.net/src/api/endpoints/posts/create.js

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'use strict';
/**
* Module dependencies
*/
import * as mongo from 'mongodb';
import parse from '../../../common/text';
import Post from '../../models/post';
import User from '../../models/user';
import Following from '../../models/following';
import DriveFile from '../../models/drive-file';
import serialize from '../../serializers/post';
import createFile from '../../common/add-file-to-drive';
import notify from '../../common/notify';
import event from '../../event';
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import config from '../../../conf';
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/**
* 最大文字数
*/
const maxTextLength = 1000;
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/**
* 添付できるファイルの数
*/
const maxMediaCount = 4;
/**
* Create a post
*
* @param {Object} params
* @param {Object} user
* @param {Object} app
* @return {Promise<object>}
*/
module.exports = (params, user, app) =>
new Promise(async (res, rej) =>
{
// Get 'text' parameter
let text = params.text;
if (text !== undefined && text !== null) {
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if (typeof text != 'string') {
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return rej('text must be a string');
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}
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text = text.trim();
if (text.length == 0) {
text = null;
} else if (text.length > maxTextLength) {
return rej('too long text');
}
} else {
text = null;
}
// Get 'media_ids' parameter
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let medias = params.media_ids;
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let files = [];
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if (medias !== undefined && medias !== null) {
if (!Array.isArray(medias)) {
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return rej('media_ids must be an array');
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}
if (medias.length > maxMediaCount) {
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return rej('too many media');
}
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// Drop duplications
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medias = medias.filter((x, i, s) => s.indexOf(x) == i);
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// Fetch files
// forEach だと途中でエラーなどがあっても return できないので
// 敢えて for を使っています。
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for (let i = 0; i < medias.length; i++) {
const media = medias[i];
if (typeof media != 'string') {
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return rej('media id must be a string');
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}
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// Validate id
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if (!mongo.ObjectID.isValid(media)) {
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return rej('incorrect media id');
}
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// Fetch file
// SELECT _id
const entity = await DriveFile.findOne({
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_id: new mongo.ObjectID(media),
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user_id: user._id
}, {
_id: true
});
if (entity === null) {
return rej('file not found');
} else {
files.push(entity);
}
}
} else {
files = null;
}
// Get 'repost_id' parameter
let repost = params.repost_id;
if (repost !== undefined && repost !== null) {
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if (typeof repost != 'string') {
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return rej('repost_id must be a string');
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}
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// Validate id
if (!mongo.ObjectID.isValid(repost)) {
return rej('incorrect repost_id');
}
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// Fetch repost to post
repost = await Post.findOne({
_id: new mongo.ObjectID(repost)
});
if (repost == null) {
return rej('repostee is not found');
} else if (repost.repost_id && !repost.text && !repost.media_ids) {
return rej('cannot repost to repost');
}
// Fetch recently post
const latestPost = await Post.findOne({
user_id: user._id
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}, {
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sort: {
_id: -1
}
});
// 直近と同じRepost対象かつ引用じゃなかったらエラー
if (latestPost &&
latestPost.repost_id &&
latestPost.repost_id.equals(repost._id) &&
text === null && files === null) {
return rej('二重Repostです(NEED TRANSLATE)');
}
// 直近がRepost対象かつ引用じゃなかったらエラー
if (latestPost &&
latestPost._id.equals(repost._id) &&
text === null && files === null) {
return rej('二重Repostです(NEED TRANSLATE)');
}
} else {
repost = null;
}
// Get 'reply_to_id' parameter
let replyTo = params.reply_to_id;
if (replyTo !== undefined && replyTo !== null) {
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if (typeof replyTo != 'string') {
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return rej('reply_to_id must be a string');
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}
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// Validate id
if (!mongo.ObjectID.isValid(replyTo)) {
return rej('incorrect reply_to_id');
}
// Fetch reply
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replyTo = await Post.findOne({
_id: new mongo.ObjectID(replyTo)
});
if (replyTo === null) {
return rej('reply to post is not found');
}
// 返信対象が引用でないRepostだったらエラー
if (replyTo.repost_id && !replyTo.text && !replyTo.media_ids) {
return rej('cannot reply to repost');
}
} else {
replyTo = null;
}
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// Get 'poll' parameter
let poll = params.poll;
if (poll !== undefined && poll !== null) {
// 選択肢が無かったらエラー
if (poll.choices == null) {
return rej('poll choices is required');
}
// 選択肢が配列でなかったらエラー
if (!Array.isArray(poll.choices)) {
return rej('poll choices must be an array');
}
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// 選択肢が空の配列でエラー
if (poll.choices.length == 0) {
return rej('poll choices is required');
}
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// Validate each choices
const shouldReject = poll.choices.some(choice => {
if (typeof choice !== 'string') return true;
if (choice.trim().length === 0) return true;
if (choice.trim().length > 100) return true;
});
if (shouldReject) {
return rej('invalid poll choices');
}
// Trim choices
poll.choices = poll.choices.map(choice => choice.trim());
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// Drop duplications
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poll.choices = poll.choices.filter((x, i, s) => s.indexOf(x) == i);
// 選択肢がひとつならエラー
if (poll.choices.length == 1) {
return rej('poll choices must be ひとつ以上');
}
// 選択肢が多すぎてもエラー
if (poll.choices.length > 10) {
return rej('many poll choices');
}
// serialize
poll.choices = poll.choices.map((choice, i) => ({
id: i, // IDを付与
text: choice,
votes: 0
}));
} else {
poll = null;
}
// テキストが無いかつ添付ファイルが無いかつRepostも無いかつ投票も無かったらエラー
if (text === null && files === null && repost === null && poll === null) {
return rej('text, media_ids, repost_id or poll is required');
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}
// 投稿を作成
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const post = await Post.insert({
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created_at: new Date(),
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media_ids: files ? files.map(file => file._id) : undefined,
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reply_to_id: replyTo ? replyTo._id : undefined,
repost_id: repost ? repost._id : undefined,
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poll: poll ? poll : undefined,
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text: text,
user_id: user._id,
app_id: app ? app._id : null
});
// Serialize
const postObj = await serialize(post);
// Reponse
res(postObj);
//--------------------------------
// Post processes
let mentions = [];
function addMention(mentionee, type) {
// Reject if already added
if (mentions.some(x => x.equals(mentionee))) return;
// Add mention
mentions.push(mentionee);
// Publish event
if (!user._id.equals(mentionee)) {
event(mentionee, type, postObj);
}
}
// Publish event to myself's stream
event(user._id, 'post', postObj);
// Fetch all followers
const followers = await Following
.find({
followee_id: user._id,
// 削除されたドキュメントは除く
deleted_at: { $exists: false }
}, {
follower_id: true,
_id: false
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});
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// Publish event to followers stream
followers.forEach(following =>
event(following.follower_id, 'post', postObj));
// Increment my posts count
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User.update({ _id: user._id }, {
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$inc: {
posts_count: 1
}
});
// If has in reply to post
if (replyTo) {
// Increment replies count
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Post.update({ _id: replyTo._id }, {
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$inc: {
replies_count: 1
}
});
// 自分自身へのリプライでない限りは通知を作成
notify(replyTo.user_id, user._id, 'reply', {
post_id: post._id
});
// Add mention
addMention(replyTo.user_id, 'reply');
}
// If it is repost
if (repost) {
// Notify
const type = text ? 'quote' : 'repost';
notify(repost.user_id, user._id, type, {
post_id: post._id
});
// If it is quote repost
if (text) {
// Add mention
addMention(repost.user_id, 'quote');
} else {
// Publish event
if (!user._id.equals(repost.user_id)) {
event(repost.user_id, 'repost', postObj);
}
}
// 今までで同じ投稿をRepostしているか
const existRepost = await Post.findOne({
user_id: user._id,
repost_id: repost._id,
_id: {
$ne: post._id
}
});
if (!existRepost) {
// Update repostee status
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Post.update({ _id: repost._id }, {
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$inc: {
repost_count: 1
}
});
}
}
// If has text content
if (text) {
// Analyze
const tokens = parse(text);
// Extract a hashtags
const hashtags = tokens
.filter(t => t.type == 'hashtag')
.map(t => t.hashtag)
// Drop dupulicates
.filter((v, i, s) => s.indexOf(v) == i);
// ハッシュタグをデータベースに登録
//registerHashtags(user, hashtags);
// Extract an '@' mentions
const atMentions = tokens
.filter(t => t.type == 'mention')
.map(m => m.username)
// Drop dupulicates
.filter((v, i, s) => s.indexOf(v) == i);
// Resolve all mentions
await Promise.all(atMentions.map(async (mention) => {
// Fetch mentioned user
// SELECT _id
const mentionee = await User
.findOne({
username_lower: mention.toLowerCase()
}, { _id: true });
// When mentioned user not found
if (mentionee == null) return;
// 既に言及されたユーザーに対する返信や引用repostの場合も無視
if (replyTo && replyTo.user_id.equals(mentionee._id)) return;
if (repost && repost.user_id.equals(mentionee._id)) return;
// Add mention
addMention(mentionee._id, 'mention');
// Create notification
notify(mentionee._id, user._id, 'mention', {
post_id: post._id
});
return;
}));
}
// Register to search database
if (text && config.elasticsearch.enable) {
const es = require('../../../db/elasticsearch');
es.index({
index: 'misskey',
type: 'post',
id: post._id.toString(),
body: {
text: post.text
}
});
}
// Append mentions data
if (mentions.length > 0) {
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Post.update({ _id: post._id }, {
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$set: {
mentions: mentions
}
});
}
});