Move channel to + route

Uses non-standard `grp` schema

packages/backend/src/misc/grp.ts

@@ -0,0 +1,14 @@
+export type Grp = {
+	name: string;
+	host: string | null;
+};
+
+export function parse(grp: string): Grp {
+	if (grp.startsWith('+')) grp = grp.substr(1);
+	const split = grp.split('@', 2);
+	return { name: split[0], host: split[1] || null };
+}
+
+export function toString(grp: Grp): string {
+	return grp.host == null ? grp.name : `${grp.name}@${grp.host}`;
+}

packages/backend/src/remote/resolve-channel.ts

@@ -0,0 +1,68 @@
+import { URL } from 'node:url';
+import webFinger from './webfinger.js';
+import config from '@/config/index.js';
+import { createGroup, updateGroup } from './activitypub/models/group.js';
+import { remoteLogger } from './logger.js';
+import chalk from 'chalk';
+import { Channel } from '@/models/entities/channel.js';
+import { Channels } from '@/models/index.js';
+import { toPuny } from '@/misc/convert-host.js';
+import { IsNull } from 'typeorm';
+
+const logger = remoteLogger.createSubLogger('resolve');
+
+export async function resolveChannel(channelName: string, host: string | null): Promise<Channel> {
+	const nameLower = channelName.toLowerCase();
+
+	if (host == null) {
+		logger.info(`return local channel: ${nameLower}`);
+		return await Channels.findOneBy({ nameLower, host: IsNull() }).then(u => {
+			if (u == null) {
+				throw new Error('channel not found');
+			} else {
+				return u;
+			}
+		});
+	}
+
+	host = toPuny(host);
+
+	if (config.host === host) {
+		logger.info(`return local channel: ${nameLower}`);
+		return await Channels.findOneBy({ nameLower, host: IsNull() }).then(u => {
+			if (u == null) {
+				throw new Error('channel not found');
+			} else {
+				return u;
+			}
+		});
+	}
+
+	const channel = await Channels.findOneBy({ nameLower, host }) | null;
+
+	const identifier = `${nameLower}@${host}`;
+
+	if (channel == null) {
+		const self = await resolveSelf(identifier);
+
+		logger.succ(`return new remote channel: ${chalk.magenta(nameLower)}`);
+		return await createGroup(self.href);
+	}
+
+	logger.info(`return existing remote user: ${nameLower}`);
+	return channel;
+}
+
+async function resolveSelf(nameLower: string) {
+	logger.info(`WebFinger for ${chalk.yellow(nameLower)}`);
+	const finger = await webFinger(nameLower, 'grp').catch(e => {
+		logger.error(`Failed to WebFinger for ${chalk.yellow(nameLower)}: ${ e.statusCode || e.message }`);
+		throw new Error(`Failed to WebFinger for ${nameLower}: ${ e.statusCode || e.message }`);
+	});
+	const self = finger.links.find(link => link.rel != null && link.rel.toLowerCase() === 'self');
+	if (!self) {
+		logger.error(`Failed to WebFinger for ${chalk.yellow(nameLower)}: self link not found`);
+		throw new Error('self link not found');
+	}
+	return self;
+}

packages/backend/src/remote/resolve-user.ts

@@ -9,7 +9,7 @@ import { Users } from '@/models/index.js';
 import { toPuny } from '@/misc/convert-host.js';
 import { IsNull } from 'typeorm';
 
-const logger = remoteLogger.createSubLogger('resolve-user');
+const logger = remoteLogger.createSubLogger('resolve');
 
 export async function resolveUser(username: string, host: string | null): Promise<User> {
 	const usernameLower = username.toLowerCase();
@@ -98,7 +98,7 @@ export async function resolveUser(username: string, host: string | null): Promis
 
 async function resolveSelf(acctLower: string) {
 	logger.info(`WebFinger for ${chalk.yellow(acctLower)}`);
-	const finger = await webFinger(acctLower).catch(e => {
+	const finger = await webFinger(acctLower, 'acct').catch(e => {
 		logger.error(`Failed to WebFinger for ${chalk.yellow(acctLower)}: ${ e.statusCode || e.message }`);
 		throw new Error(`Failed to WebFinger for ${acctLower}: ${ e.statusCode || e.message }`);
 	});

packages/backend/src/remote/webfinger.ts

@@ -12,13 +12,13 @@ type IWebFinger = {
 	subject: string;
 };
 
-export default async function(query: string): Promise<IWebFinger> {
-	const url = genUrl(query);
+export default async function(query: string, schema: string): Promise<IWebFinger> {
+	const url = genUrl(query, schema);
 
 	return await getJson(url, 'application/jrd+json, application/json') as IWebFinger;
 }
 
-function genUrl(query: string) {
+function genUrl(query: string, schema: string) {
 	if (query.match(/^https?:\/\//)) {
 		const u = new URL(query);
 		return `${u.protocol}//${u.hostname}/.well-known/webfinger?` + urlQuery({ resource: query });
@@ -27,7 +27,7 @@ function genUrl(query: string) {
 	const m = query.match(/^([^@]+)@(.*)/);
 	if (m) {
 		const hostname = m[2];
-		return `https://${hostname}/.well-known/webfinger?` + urlQuery({ resource: `acct:${query}` });
+		return `https://${hostname}/.well-known/webfinger?` + urlQuery({ resource: `${schema}:${query}` });
 	}
 
 	throw new Error(`Invalid query (${query})`);

packages/backend/src/server/api/endpoints/channels/show.ts

@@ -1,6 +1,9 @@
 import define from '../../define.js';
 import { ApiError } from '../../error.js';
 import { Channels } from '@/models/index.js';
+import { Channel } from '@/models/entities/channel.js';
+import { FindOptionsWhere, In, IsNull } from 'typeorm';
+import { resolveChannel } from '@/remote/resolve-channel.js';
 
 export const meta = {
 	tags: ['channels'],
@@ -14,6 +17,13 @@ export const meta = {
 	},
 
 	errors: {
+		failedToResolveRemoteChannel: {
+			message: 'Failed to resolve remote channel.',
+			code: 'FAILED_TO_RESOLVE_REMOTE_CHANNEL',
+			id: '701c2582-fd94-11ec-a43c-3c7c3f10cc28',
+			kind: 'server',
+		},
+
 		noSuchChannel: {
 			message: 'No such channel.',
 			code: 'NO_SUCH_CHANNEL',
@@ -24,10 +34,25 @@ export const meta = {
 
 export const paramDef = {
 	type: 'object',
-	properties: {
-		channelId: { type: 'string', format: 'misskey:id' },
-	},
-	required: ['channelId'],
+	anyOf: [
+		{
+			properties: {
+				channelId: { type: 'string', format: 'misskey:id' },
+			},
+			required: ['channelId'],
+		},
+		{
+			properties: {
+				channelName: { type: 'string' },
+				host: {
+					type: 'string',
+					nullable: true,
+					description: 'The local host is represented with `null`.',
+				},
+			},
+			required: ['channelName'],
+		},
+	],
 } as const;
 
 // eslint-disable-next-line import/no-default-export
@@ -36,6 +61,19 @@ export default define(meta, paramDef, async (ps, me) => {
 		id: ps.channelId,
 	});
 
+	if (typeof ps.host === 'string' && typeof ps.channelName === 'string') {
+		user = await resolveChannel(ps.channelName, ps.host).catch(e => {
+			apiLogger.warn(`failed to resolve remote channel: ${e}`);
+			throw new ApiError(meta.errors.failedToResolveRemoteChannel);
+		});
+	} else {
+		const q: FindOptionsWhere<Channel> = ps.channelId != null
+			? { id: ps.channelId }
+			: { usernameLower: ps.username!.toLowerCase(), host: IsNull() };
+
+		user = await Channels.findOneBy(q);
+	}
+
 	if (channel == null) {
 		throw new ApiError(meta.errors.noSuchChannel);
 	}

packages/backend/src/server/web/index.ts

@@ -19,6 +19,7 @@ import { fetchMeta } from '@/misc/fetch-meta.js';
 import config from '@/config/index.js';
 import { Users, Notes, UserProfiles, Pages, Channels, Clips, GalleryPosts } from '@/models/index.js';
 import * as Acct from '@/misc/acct.js';
+import * as Grp from '@/misc/grp.js';
 import { getNoteSummary } from '@/misc/get-note-summary.js';
 import { queues } from '@/queue/queues.js';
 import { genOpenapiSpec } from '../api/openapi/gen-spec.js';
@@ -389,9 +390,26 @@ router.get('/gallery/:post', async (ctx, next) => {
 });
 
 // Channel
-router.get('/channels/:channel', async (ctx, next) => {
+router.get('/channels/:channel', async ctx => {
 	const channel = await Channels.findOneBy({
 		id: ctx.params.channel,
+		host: IsNull(),
+	});
+
+	if (channel == null) {
+		ctx.status = 404;
+		return;
+	}
+
+	ctx.redirect(`/+${channel.slug}${channel.host == null ? '' : '@' + channel.host}`);
+});
+
+router.get('/\\+:channel', async (ctx, next) => {
+	const { name, host } = Grp.parse(ctx.params.channel);
+
+	const channel = await Channels.findOneBy({
+		slug: name,
+		host: host ?? IsNull(),
 	});
 
 	if (channel) {

packages/backend/src/server/web/views/channel.pug

@@ -2,7 +2,7 @@ extends ./base
 
 block vars
 	- const title = channel.name;
-	- const url = `${config.url}/channels/${channel.id}`;
+	- const url = `${config.url}/+${(channel.host ? `${channel.slug}@${channel.host}` : channel.slug)}`;
 
 block title
 	= `${title} | ${instanceName}`

packages/backend/src/server/well-known.ts

@@ -2,10 +2,12 @@ import Router from '@koa/router';
 
 import config from '@/config/index.js';
 import * as Acct from '@/misc/acct.js';
+import * as Grp from '@/misc/grp.js';
 import { links } from './nodeinfo.js';
 import { escapeAttribute, escapeValue } from '@/prelude/xml.js';
-import { Users } from '@/models/index.js';
+import { Users, Channels } from '@/models/index.js';
 import { User } from '@/models/entities/user.js';
+import { Channel } from '@/models/entities/channel.js';
 import { FindOptionsWhere, IsNull } from 'typeorm';
 
 // Init router
@@ -66,75 +68,132 @@ router.get('/.well-known/change-password', async ctx => {
 });
 */
 
-router.get(webFingerPath, async ctx => {
-	const fromId = (id: User['id']): FindOptionsWhere<User> => ({
+const lookupUserById = (id: string) => {
+	const query = {
 		id,
 		host: IsNull(),
 		isSuspended: false,
-	});
+	} as FindOptionsWhere<User>;
+	return lookupUser(query);
+};
 
-	const generateQuery = (resource: string): FindOptionsWhere<User> | number =>
-		resource.startsWith(`${config.url.toLowerCase()}/users/`) ?
-			fromId(resource.split('/').pop()!) :
-			fromAcct(Acct.parse(
-				resource.startsWith(`${config.url.toLowerCase()}/@`) ? resource.split('/').pop()! :
-				resource.startsWith('acct:') ? resource.slice('acct:'.length) :
-				resource));
+const lookupUserByName = (resource: string) => {
+	const acct = Acct.parse(resource);
+	if (acct.host && acct.host !== config.host.toLowerCase()) {
+		return 422;
+	};
+	const query = {
+		usernameLower: acct.username,
+		host: IsNull(),
+		isSuspended: false,
+	} as FindOptionsWhere<User>;
+	return lookupUser(query);
+};
 
-	const fromAcct = (acct: Acct.Acct): FindOptionsWhere<User> | number =>
-		!acct.host || acct.host === config.host.toLowerCase() ? {
-			usernameLower: acct.username,
-			host: IsNull(),
-			isSuspended: false,
-		} : 422;
+const lookupUser = async (query: FindOptionsWhere<User>) => {
+		const user = await Users.findOneBy(query);
 
+		if (user == null) {
+			return 404;
+		}
+
+		const subject = `acct:${user.username}@${config.host}`;
+		const self = {
+			rel: 'self',
+			type: 'application/activity+json',
+			href: `${config.url}/users/${user.id}`,
+		};
+		const profilePage = {
+			rel: 'http://webfinger.net/rel/profile-page',
+			type: 'text/html',
+			href: `${config.url}/@${user.username}`,
+		};
+		const subscribe = {
+			rel: 'http://ostatus.org/schema/1.0/subscribe',
+			template: `${config.url}/authorize-follow?acct={uri}`,
+		};
+
+		return { subject, links: [self, profilePage, subscribe] };
+};
+
+
+const lookupChannelById = (id: string) => {
+	const query = {
+		id,
+		host: IsNull(),
+	} as FindOptionsWhere<Channel>;
+	return lookupChannel(query);
+};
+
+const lookupChannelByName = (resource: string) => {
+	const grp = Grp.parse(resource);
+	if (grp.host && grp.host !== config.host.toLowerCase()) {
+		return 422;
+	};
+	const query = {
+		slug: grp.name,
+		host: IsNull(),
+	} as FindOptionsWhere<Channel>;
+	return lookupChannel(query);
+};
+
+const lookupChannel = async (query: FindOptionsWhere<Channel>) => {
+		const channel = await Channels.findOneBy(query);
+
+		if (channel == null) {
+			return 404;
+		}
+
+		const subject = `grp:${channel.slug}@${config.host}`;
+		const self = {
+			rel: 'self',
+			type: 'application/activity+json',
+			href: `${config.url}/channel/${channel.id}`,
+		};
+		const profilePage = {
+			rel: 'http://webfinger.net/rel/profile-page',
+			type: 'text/html',
+			href: `${config.url}/+${channel.slug}`,
+		};
+
+		return { subject, links: [self, profilePage] };
+};
+
+router.get(webFingerPath, async ctx => {
 	if (typeof ctx.query.resource !== 'string') {
 		ctx.status = 400;
 		return;
 	}
 
-	const query = generateQuery(ctx.query.resource.toLowerCase());
+	const resource = ctx.query.resource.toLowerCase();
 
-	if (typeof query === 'number') {
-		ctx.status = query;
-		return;
+	let elements: object | number;
+	if (resource.startsWith(`${config.url.toLowerCase()}/users/`) || resource.startsWith(`${config.url.toLowerCase()}/@`)) {
+		elements = await lookupUserById(resource.split('/').pop()!);
+	} else if (resource.startsWith('acct:')) {
+		elements = await lookupUserByName(resource.slice('acct:'.length));
+	} else if (resource.startsWith(`${config.url.toLowerCase()}/channel/`) || resource.startsWith(`${config.url.toLowerCase()}/+`)) {
+		elements = await lookupChannelById(resource.split('/').pop()!);
+	} else if (resource.startsWith('grp:')) {
+		elements = await lookupChannelByName(resource.slice('grp:'.length));
+	} else {
+		elements = 400;
 	}
 
-	const user = await Users.findOneBy(query);
-
-	if (user == null) {
-		ctx.status = 404;
+	if (typeof elements === 'number') {
+		ctx.status = elements;
 		return;
 	}
 
-	const subject = `acct:${user.username}@${config.host}`;
-	const self = {
-		rel: 'self',
-		type: 'application/activity+json',
-		href: `${config.url}/users/${user.id}`,
-	};
-	const profilePage = {
-		rel: 'http://webfinger.net/rel/profile-page',
-		type: 'text/html',
-		href: `${config.url}/@${user.username}`,
-	};
-	const subscribe = {
-		rel: 'http://ostatus.org/schema/1.0/subscribe',
-		template: `${config.url}/authorize-follow?acct={uri}`,
-	};
-
 	if (ctx.accepts(jrd, xrd) === xrd) {
 		ctx.body = XRD(
-			{ element: 'Subject', value: subject },
-			{ element: 'Link', attributes: self },
-			{ element: 'Link', attributes: profilePage },
-			{ element: 'Link', attributes: subscribe });
+			{ element: 'Subject', value: elements.subject },
+			...elements.links.map((link) => ({
+				element: 'Link', attributes: link,
+			})));
 		ctx.type = xrd;
 	} else {
-		ctx.body = {
-			subject,
-			links: [self, profilePage, subscribe],
-		};
+		ctx.body = elements;
 		ctx.type = jrd;
 	}
 

packages/client/src/components/note.vue

@@ -70,7 +70,7 @@
 						<span>{{ i18n.ts.showMore }}</span>
 					</button>
 				</div>
-				<MkA v-if="appearNote.channel && !inChannel" class="channel" :to="`/channels/${appearNote.channel.id}`"><i class="fas fa-satellite-dish"></i> {{ appearNote.channel.name }}</MkA>
+				<MkA v-if="appearNote.channel && !inChannel" class="channel" :to="channelPage(appearNote.channel)"><i class="fas fa-satellite-dish"></i> {{ appearNote.channel.name }}</MkA>
 			</div>
 			<footer class="footer">
 				<XReactionsViewer ref="reactionsViewer" :note="appearNote"/>
@@ -122,6 +122,7 @@ import { pleaseLogin } from '@/scripts/please-login';
 import { focusPrev, focusNext } from '@/scripts/focus';
 import { checkWordMute } from '@/scripts/check-word-mute';
 import { userPage } from '@/filters/user';
+import { channelPage } from '@/filters/channel';
 import * as os from '@/os';
 import { defaultStore, noteViewInterruptors } from '@/store';
 import { reactionPicker } from '@/scripts/reaction-picker';

packages/client/src/filters/channel.ts

@@ -0,0 +1,10 @@
+import * as misskey from 'misskey-js';
+import { url } from '@/config';
+
+const normalize = (channel: misskey.entities.Channel) => {
+  return channel.host == null ? channel.slug : `${channel.slug}@${channel.host}`;
+};
+
+export const channelPage = (channel: misskey.entities.Channel, path?, absolute = false) => {
+	return `${absolute ? url : ''}/+${normalize(channel)}${(path ? `/${path}` : '')}`;
+};

packages/client/src/pages/channel.vue

@@ -46,7 +46,7 @@ export default defineComponent({
 	},
 
 	props: {
-		channelId: {
+		channelName: {
 			type: String,
 			required: true
 		}
@@ -80,7 +80,7 @@ export default defineComponent({
 		channelId: {
 			async handler() {
 				this.channel = await os.api('channels/show', {
-					channelId: this.channelId,
+					channelName: this.channelName,
 				});
 			},
 			immediate: true
@@ -117,12 +117,12 @@ export default defineComponent({
 		color: #fff;
 		background: rgba(0, 0, 0, 0.5);
 		border-radius: 100%;
-		
+
 		> i {
 			vertical-align: middle;
 		}
 	}
-	
+
 	> .banner {
 		position: relative;
 		height: 200px;

packages/client/src/router.ts

@@ -44,7 +44,7 @@ const defaultRoutes = [
 	{ path: '/channels', component: page('channels') },
 	{ path: '/channels/new', component: page('channel-editor') },
 	{ path: '/channels/:channelId/edit', component: page('channel-editor'), props: true },
-	{ path: '/channels/:channelId', component: page('channel'), props: route => ({ channelId: route.params.channelId }) },
+	{ path: '/+:channel', component: page('channel'), props: route => ({ channelName: route.params.channel }) },
 	{ path: '/clips/:clipId', component: page('clip'), props: route => ({ clipId: route.params.clipId }) },
 	{ path: '/timeline/list/:listId', component: page('user-list-timeline'), props: route => ({ listId: route.params.listId }) },
 	{ path: '/timeline/antenna/:antennaId', component: page('antenna-timeline'), props: route => ({ antennaId: route.params.antennaId }) },