Initial commit

apps/backend/src/lib/prisma.ts

@@ -0,0 +1,50 @@
+import { PrismaPg } from '@prisma/adapter-pg'
+import { PrismaClient } from '@/generated/prisma/client'
+
+const globalForPrisma = globalThis as unknown as { prisma?: PrismaClient }
+
+function hasExpectedDelegates(client: PrismaClient) {
+  const prismaClient = client as unknown as {
+    court?: { findMany?: unknown }
+    sport?: { findMany?: unknown }
+  }
+
+  return (
+    typeof prismaClient.court?.findMany === 'function' &&
+    typeof prismaClient.sport?.findMany === 'function'
+  )
+}
+
+function buildPrismaClient() {
+  const databaseUrl = Bun.env.DATABASE_URL
+
+  if (!databaseUrl) {
+    throw new Error('Missing DATABASE_URL in backend environment.')
+  }
+
+  const adapter = new PrismaPg({
+    connectionString: databaseUrl,
+  })
+
+  return new PrismaClient({ adapter })
+}
+
+export function getPrismaClient() {
+  if (globalForPrisma.prisma && hasExpectedDelegates(globalForPrisma.prisma)) {
+    return globalForPrisma.prisma
+  }
+
+  if (globalForPrisma.prisma && !hasExpectedDelegates(globalForPrisma.prisma)) {
+    void globalForPrisma.prisma.$disconnect()
+  }
+
+  const prisma = buildPrismaClient()
+
+  if (Bun.env.NODE_ENV !== 'production') {
+    globalForPrisma.prisma = prisma
+  }
+
+  return prisma
+}
+
+export const db = getPrismaClient()