Update src/server/api/endpoints/aggregation/hashtags.ts

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syuilo 2018-11-02 23:32:40 +09:00
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import Note from '../../../../models/note';
import Meta from '../../../../models/meta';
import define from '../../define';
export const meta = {
requireCredential: false,
};
export default define(meta, (ps) => new Promise(async (res, rej) => {
const meta = await Meta.findOne({});
const hidedTags = meta ? (meta.hidedTags || []).map(t => t.toLowerCase()) : [];
const span = 1000 * 60 * 60 * 24 * 7; // 1週間
//#region 1. 指定期間の内に投稿されたハッシュタグ(とユーザーのペア)を集計
const data = await Note.aggregate([{
$match: {
createdAt: {
$gt: new Date(Date.now() - span)
},
tagsLower: {
$exists: true,
$ne: []
}
}
}, {
$unwind: '$tagsLower'
}, {
$group: {
_id: { tag: '$tagsLower', userId: '$userId' }
}
}]) as Array<{
_id: {
tag: string;
userId: any;
}
}>;
//#endregion
if (data.length == 0) {
return res([]);
}
let tags: Array<{
name: string;
count: number;
}> = [];
// カウント
data.map(x => x._id).forEach(x => {
// ブラックリストに登録されているタグなら弾く
if (hidedTags.includes(x.tag)) return;
const i = tags.findIndex(tag => tag.name == x.tag);
if (i != -1) {
tags[i].count++;
} else {
tags.push({
name: x.tag,
count: 1
});
}
});
// タグを人気順に並べ替え
tags = tags.sort((a, b) => b.count - a.count);
tags = tags.slice(0, 30);
res(tags);
});