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import * as Router from '@koa/router';
import config from '../../config';
import $ from 'cafy';
import { ID } from '../../misc/cafy-id';
import * as url from '../../prelude/url';
import { renderActivity } 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';
import { Users, Followings } from '../../models';
import { LessThan } from 'typeorm';
export default async (ctx: Router.RouterContext) => {
const userId = ctx.params.user;
// Get 'cursor' parameter
const [cursor, cursorErr] = $.optional.type(ID).get(ctx.request.query.cursor);
// Get 'page' parameter
const pageErr = !$.optional.str.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 Users.findOne({
id: userId,
host: null
});
if (user == null) {
ctx.status = 404;
return;
}
const limit = 10;
const partOf = `${config.url}/users/${userId}/followers`;
if (page) {
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 = LessThan(cursor);
}
// Get followers
const followings = await Followings.find({
where: query,
take: limit + 1,
order: { 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(
`${partOf}?${url.query({
page: 'true',
cursor
})}`,
user.followersCount, renderedFollowers, partOf,
undefined,
inStock ? `${partOf}?${url.query({
page: 'true',
cursor: followings[followings.length - 1].id
})}` : undefined
);
ctx.body = renderActivity(rendered);
setResponseType(ctx);
} else {
// index page
const rendered = renderOrderedCollection(partOf, user.followersCount, `${partOf}?page=true`);
ctx.body = renderActivity(rendered);
ctx.set('Cache-Control', 'public, max-age=180');
setResponseType(ctx);
}
};
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