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