Implement authentication, waitlist, and logging upgrades

server/models/InvitationCode.ts

@@ -0,0 +1,26 @@
+import mongoose from 'mongoose'
+
+const { Schema } = mongoose
+
+export interface InvitationCodeDocument extends mongoose.Document {
+  code: string
+  createdBy: mongoose.Types.ObjectId
+  createdAt: Date
+  expiresAt?: Date
+  usedBy?: mongoose.Types.ObjectId
+  usedAt?: Date
+}
+
+const invitationSchema = new mongoose.Schema<InvitationCodeDocument>({
+  code: { type: String, required: true, unique: true, uppercase: true, trim: true },
+  createdBy: { type: Schema.Types.ObjectId, ref: 'User', required: true },
+  createdAt: { type: Date, default: () => new Date() },
+  expiresAt: { type: Date },
+  usedBy: { type: Schema.Types.ObjectId, ref: 'User' },
+  usedAt: { type: Date },
+})
+
+export const InvitationCode =
+  (mongoose.models.InvitationCode as mongoose.Model<InvitationCodeDocument> | undefined) ||
+  mongoose.model<InvitationCodeDocument>('InvitationCode', invitationSchema)
+