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| Chat and workspace agents: channels, DMs and named agents you talk to | 1 | import { type ShouldRevalidateFunctionArgs, data } from "react-router"; |
| 2 | ||
| 3 | import type { Channel, ChannelMember, ChatMessage, User } from "@g1t/contracts"; | |
| 4 | ||
| 5 | import type { Route } from "./+types/channel"; | |
| 6 | import { ChannelView } from "../../../components/chat/channel"; | |
| 7 | import { ChatUnavailable } from "../../../components/chat/empty"; | |
| 8 | import { channelPath } from "../../../lib/chat"; | |
| 9 | import { rememberChat } from "../../../lib/chat.server"; | |
| 10 | import { page } from "../../../lib/meta"; | |
| 11 | import { chat } from "../../../lib/services.server"; | |
| 12 | import { requireUser, roleIn } from "../../../lib/session.server"; | |
| 13 | ||
| 14 | export function meta({ loaderData, params, ...args }: Route.MetaArgs) { | |
| 15 | const title = loaderData && "title" in loaderData ? loaderData.title : "Chat"; | |
| 16 | return page(args, { title: `${title} · ${params.owner} · g1t` }); | |
| 17 | } | |
| 18 | ||
| 19 | export type ChannelData = | |
| 20 | | { unavailable: true; title: string } | |
| 21 | | { | |
| 22 | unavailable: false; | |
| 23 | title: string; | |
| 24 | channel: Channel; | |
| 25 | members: ChannelMember[]; | |
| 26 | messages: ChatMessage[]; | |
| 27 | older: string | null; | |
| 28 | /** Whether the viewer is in it: a public channel can be read before joining. */ | |
| 29 | joined: boolean; | |
| 30 | }; | |
| 31 | ||
| 32 | /** | |
| 33 | * One conversation: a channel by its name (`-/chat/general`) or a direct | |
| 34 | * message by its id (`-/chat/dm/<id>`), with its latest messages. Live | |
| 35 | * updates arrive over the socket once the page is open. | |
| 36 | */ | |
| 37 | export async function loader({ params, context, request }: Route.LoaderArgs) { | |
| 38 | const viewer = requireUser(context, request); | |
| 39 | if (!roleIn(viewer, params.owner)) throw data(null, { status: 404 }); | |
| 40 | const slug = params.owner.toLowerCase(); | |
| 41 | const name = "channel" in params ? (params.channel as string | undefined) : undefined; | |
| 42 | const fallbackTitle = name ? `#${name}` : "Direct message"; | |
| 43 | const read = await readConversation(slug, viewer, name, "id" in params ? (params.id as string | undefined) : undefined).catch( | |
| 44 | (error: unknown) => { | |
| 45 | console.error("chat: the conversation could not be read", error); | |
| 46 | return "unavailable" as const; | |
| 47 | }, | |
| 48 | ); | |
| 49 | if (read === "missing") throw data(null, { status: 404 }); | |
| 50 | if (read === "unavailable") return { unavailable: true, title: fallbackTitle } satisfies ChannelData; | |
| 51 | const secure = new URL(request.url).protocol === "https:"; | |
| 52 | return data(read, { headers: { "Set-Cookie": rememberChat(channelPath(slug, read.channel), secure) } }); | |
| 53 | } | |
| 54 | ||
| 55 | /** The conversation and its latest messages; "missing" for a 404, "unavailable" when chat does not answer. */ | |
| 56 | async function readConversation( | |
| 57 | slug: string, | |
| 58 | viewer: User, | |
| 59 | name: string | undefined, | |
| 60 | byId: string | undefined, | |
| 61 | ): Promise<Extract<ChannelData, { unavailable: false }> | "missing" | "unavailable"> { | |
| 62 | // A channel's address is its name; a direct message's, its id. | |
| 63 | const lookup = byId ? chat.channel(slug, byId, viewer) : name ? chat.channelByName(slug, name, viewer) : null; | |
| 64 | if (!lookup) return "missing"; | |
| 65 | const detail = await lookup; | |
| 66 | if (!detail.ok) return detail.error.code === "not_found" || detail.error.code === "forbidden" ? "missing" : "unavailable"; | |
| 67 | const history = await chat.messages(slug, detail.value.channel.id, viewer, { limit: 60 }); | |
| 68 | const { channel, members } = detail.value; | |
| 69 | // A public channel can be read before joining it. | |
| 70 | const joined = members.some((m) => m.member.kind === "user" && m.member.id === viewer.id); | |
| 71 | const others = members.filter((m) => !(m.member.kind === "user" && m.member.id === viewer.id)); | |
| 72 | const title = | |
| 73 | channel.kind === "channel" | |
| 74 | ? `#${channel.name}` | |
| 75 | : others.map((m) => m.member.display_name || m.member.name).join(", ") || "Direct message"; | |
| 76 | return { | |
| 77 | unavailable: false, | |
| 78 | title, | |
| 79 | channel, | |
| 80 | members, | |
| 81 | messages: history.ok ? history.value.messages : [], | |
| 82 | older: history.ok ? history.value.older : null, | |
| 83 | joined, | |
| 84 | }; | |
| 85 | } | |
| 86 | ||
| 87 | /** Opening a thread (`?thread=`) is the same page: nothing to load again. */ | |
| 88 | export function shouldRevalidate({ currentUrl, nextUrl, formMethod, defaultShouldRevalidate }: ShouldRevalidateFunctionArgs) { | |
| 89 | if (formMethod && formMethod !== "GET") return defaultShouldRevalidate; | |
| 90 | if (currentUrl.pathname === nextUrl.pathname) return false; | |
| 91 | return defaultShouldRevalidate; | |
| 92 | } | |
| 93 | ||
| 94 | export default function ChannelPage({ loaderData }: Route.ComponentProps) { | |
| 95 | if (loaderData.unavailable) return <ChatUnavailable title={loaderData.title} />; | |
| 96 | return <ChannelView key={loaderData.channel.id} data={loaderData} />; | |
| 97 | } |
