Add admin impersonation feature in dev

This gives devs the ability to impersonate users to reproduce reported bugs

src/app/api/admin/impersonate/[slackId]/route.ts

@@ -0,0 +1,30 @@
+import { getSelfPerson } from '@/app/utils/airtable'
+import { redirect } from 'next/navigation'
+import { NextRequest } from 'next/server'
+
+import { HsSession, signAndSet } from '@/app/utils/auth'
+
+export async function GET(
+  _request: NextRequest,
+  { params }: { params: { slackId: string } },
+) {
+  if (process.env.NODE_ENV === 'development') {
+    // only allow impersonation in development while testing
+    const { slackId } = params
+    // look for airtable user with this record
+    const person = await getSelfPerson(slackId)
+    const id = person.id
+    const email = person.fields.email
+
+    const session: HsSession = {
+      personId: id,
+      authType: 'impersonation',
+      slackId,
+      email,
+    }
+
+    await signAndSet(session)
+  }
+
+  redirect('/signpost')
+}

src/app/utils/auth.ts

@@ -7,7 +7,7 @@ export interface HsSession {
   /// The Person record ID in the high seas base
   personId: string
 
-  authType: 'slack-oauth' | 'magic-link'
+  authType: 'slack-oauth' | 'magic-link' | 'impersonation'
   slackId: string
   name?: string
   firstName?: string
@@ -75,7 +75,7 @@ async function hashSession(session: HsSession) {
   return hashHex
 }
 
-async function signAndSet(session: HsSession) {
+export async function signAndSet(session: HsSession) {
   session.sig = await hashSession(session)
 
   cookies().set(sessionCookieName, JSON.stringify(session), {