import * as mongo from 'mongodb'; import * as Router from 'koa-router'; import config from '../../config'; import $ from 'cafy'; import ID, { transform } from '../../misc/cafy-id'; import User from '../../models/user'; import Following from '../../models/following'; import pack from '../../remote/activitypub/renderer'; import renderOrderedCollection from '../../remote/activitypub/renderer/ordered-collection'; import renderOrderedCollectionPage from '../../remote/activitypub/renderer/ordered-collection-page'; import renderFollowUser from '../../remote/activitypub/renderer/follow-user'; import { setResponseType } from '../activitypub'; export default async (ctx: Router.IRouterContext) => { const userId = new mongo.ObjectID(ctx.params.user); // Get 'cursor' parameter const [cursor = null, cursorErr] = $.type(ID).optional.get(ctx.request.query.cursor); // Get 'page' parameter const pageErr = !$.str.optional.or(['true', 'false']).ok(ctx.request.query.page); const page: boolean = ctx.request.query.page === 'true'; // Validate parameters if (cursorErr || pageErr) { ctx.status = 400; return; } // Verify user const user = await User.findOne({ _id: userId, host: null }); if (user === null) { ctx.status = 404; return; } const limit = 10; const partOf = `${config.url}/users/${userId}/followers`; if (page) { // Construct query const query = { followeeId: user._id } as any; // カーソルが指定されている場合 if (cursor) { query._id = { $lt: transform(cursor) }; } // Get followers const followings = await Following .find(query, { limit: limit + 1, sort: { _id: -1 } }); // 「次のページ」があるかどうか const inStock = followings.length === limit + 1; if (inStock) followings.pop(); const renderedFollowers = await Promise.all(followings.map(following => renderFollowUser(following.followerId))); const rendered = renderOrderedCollectionPage( `${partOf}?page=true${cursor ? `&cursor=${cursor}` : ''}`, user.followersCount, renderedFollowers, partOf, null, inStock ? `${partOf}?page=true&cursor=${followings[followings.length - 1]._id}` : null ); ctx.body = pack(rendered); setResponseType(ctx); } else { // index page const rendered = renderOrderedCollection(partOf, user.followersCount, `${partOf}?page=true`, null); ctx.body = pack(rendered); ctx.set('Cache-Control', 'private, max-age=0, must-revalidate'); setResponseType(ctx); } };