use shorter user ids

prisma/migrations/20250413215708_update_user_id_format/migration.sql

@@ -0,0 +1,18 @@
+/*
+  Warnings:
+
+  - The primary key for the `user_settings` table will be changed. If it partially fails, the table could be left without primary key constraint.
+  - You are about to alter the column `id` on the `user_settings` table. The data in that column could be lost. The data in that column will be cast from `Text` to `VarChar(8)`.
+  - The primary key for the `users` table will be changed. If it partially fails, the table could be left without primary key constraint.
+  - You are about to alter the column `id` on the `users` table. The data in that column could be lost. The data in that column will be cast from `Text` to `VarChar(8)`.
+
+*/
+-- AlterTable
+ALTER TABLE "user_settings" DROP CONSTRAINT "user_settings_pkey",
+ALTER COLUMN "id" SET DATA TYPE VARCHAR(8),
+ADD CONSTRAINT "user_settings_pkey" PRIMARY KEY ("id");
+
+-- AlterTable
+ALTER TABLE "users" DROP CONSTRAINT "users_pkey",
+ALTER COLUMN "id" SET DATA TYPE VARCHAR(8),
+ADD CONSTRAINT "users_pkey" PRIMARY KEY ("id");

prisma/schema.prisma

@@ -58,7 +58,7 @@ model sessions {
 }
 
 model user_settings {
-  id                        String   @id
+  id                        String   @id @db.VarChar(8)
   application_theme         String?  @db.VarChar(255)
   application_language      String?  @db.VarChar(255)
   default_subtitle_language String?  @db.VarChar(255)
@@ -68,7 +68,7 @@ model user_settings {
 }
 
 model users {
-  id             String    @id
+  id             String    @id @db.VarChar(8)
   public_key     String    @unique(map: "users_public_key_unique")
   namespace      String    @db.VarChar(255)
   created_at     DateTime  @db.Timestamptz(0)

server/routes/auth/register/complete.ts

@@ -1,7 +1,7 @@
 import { z } from 'zod';
 import { useChallenge } from '~/utils/challenge';
 import { useAuth } from '~/utils/auth';
-import { randomUUID } from 'crypto';
+import { generateShortId } from '~/utils/id';
 
 const completeSchema = z.object({
   publicKey: z.string(),
@@ -49,7 +49,7 @@ export default defineEventHandler(async (event) => {
     });
   }
   
-  const userId = randomUUID();
+  const userId = generateShortId();
   const now = new Date();
   
   const user = await prisma.users.create({

server/utils/id.ts

@@ -0,0 +1,34 @@
+import { randomBytes } from 'crypto';
+
+/**
+ * Generates a short, unique ID for users
+ * Format: 8 characters (base62 encoded)
+ * This provides ~218 trillion possible combinations
+ */
+export function generateShortId(): string {
+  // Generate 6 random bytes (48 bits)
+  const bytes = randomBytes(6);
+  
+  // Convert to base62 (0-9, a-z, A-Z)
+  const base62 = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
+  let result = '';
+  
+  // Convert bytes to base62
+  let value = 0;
+  for (let i = 0; i < bytes.length; i++) {
+    value = (value << 8) + bytes[i];
+  }
+  
+  // Convert to base62
+  while (value > 0) {
+    result = base62[value % 62] + result;
+    value = Math.floor(value / 62);
+  }
+  
+  // Pad with zeros if needed
+  while (result.length < 8) {
+    result = '0' + result;
+  }
+  
+  return result;
+}