49 lines
2.1 KiB
TypeScript
49 lines
2.1 KiB
TypeScript
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import { NextResponse } from "next/server"
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import { cookies } from "next/headers"
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import { getSessionUser } from "@/lib/session"
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import { getAccountContext } from "@/lib/account"
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import { getAdapter, saveEsignConnection, type ESignProvider } from "@/lib/esign"
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import { verifyState, ESIGN_NONCE_COOKIE } from "@/lib/esign/state"
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// OAuth callback — exchanges the code for tokens and stores the connection.
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export async function GET(request: Request, { params }: { params: Promise<{ provider: string }> }) {
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const { provider } = await params
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const adapter = getAdapter(provider)
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const settings = new URL("/settings/integrations", request.url)
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const cookieStore = await cookies()
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const nonceCookie = cookieStore.get(ESIGN_NONCE_COOKIE)?.value
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const done = (p: Record<string, string>) => {
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for (const [k, v] of Object.entries(p)) settings.searchParams.set(k, v)
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const res = NextResponse.redirect(settings)
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res.cookies.set(ESIGN_NONCE_COOKIE, "", { path: "/", maxAge: 0 })
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return res
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}
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const url = new URL(request.url)
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const code = url.searchParams.get("code")
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const state = url.searchParams.get("state")
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const oauthError = url.searchParams.get("error")
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if (oauthError || !adapter || adapter.kind !== "oauth") return done({ error: "connect_failed" })
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const st = state ? verifyState(state) : null
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// CSRF: state nonce must match the cookie, and the session must be the same owner.
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if (!code || !st || st.provider !== provider || !nonceCookie || nonceCookie !== st.nonce) {
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return done({ error: "invalid_state" })
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}
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const user = await getSessionUser()
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if (!user) return done({ error: "invalid_state" })
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const ctx = await getAccountContext(user.id)
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if (ctx.ownerId !== st.ownerId) return done({ error: "invalid_state" })
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try {
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const tokens = await adapter.exchangeCode(code)
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if (!tokens.accountId || !tokens.baseUri) throw new Error("No account returned from provider")
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await saveEsignConnection(st.ownerId, provider as ESignProvider, tokens)
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return done({ connected: provider })
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} catch {
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return done({ error: "connect_failed" })
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}
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}
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