feat: 新增数据库

server/utils/prisma.ts

@@ -0,0 +1,76 @@
+import { PrismaMariaDb } from "@prisma/adapter-mariadb";
+import { PrismaClient } from "~~/app/generated/prisma/client";
+
+const globalForPrisma = globalThis as unknown as {
+  prisma?: PrismaClient;
+  prismaLogged?: boolean;
+};
+
+const databaseUrl = process.env.DATABASE_URL;
+
+if (!databaseUrl) {
+  throw new Error("DATABASE_URL is required to initialize PrismaClient");
+}
+
+type MariaDbPoolConfig = Exclude<ConstructorParameters<typeof PrismaMariaDb>[0], string>;
+
+function getNumberParam(url: URL, name: string, fallback: number) {
+  const value = url.searchParams.get(name);
+  if (!value) {
+    return fallback;
+  }
+
+  const parsed = Number(value);
+  return Number.isFinite(parsed) && parsed > 0 ? parsed : fallback;
+}
+
+function createMariaDbConfig(urlString: string): MariaDbPoolConfig {
+  const url = new URL(urlString);
+  const database = decodeURIComponent(url.pathname.replace(/^\//, ""));
+
+  if (!url.hostname || !url.username || !database) {
+    throw new Error("DATABASE_URL must include host, user and database");
+  }
+
+  const port = url.port ? Number(url.port) : 3306;
+
+  if (!Number.isInteger(port) || port <= 0) {
+    throw new Error("DATABASE_URL port is invalid");
+  }
+
+  return {
+    host: url.hostname,
+    port,
+    user: decodeURIComponent(url.username),
+    password: decodeURIComponent(url.password),
+    database,
+    connectionLimit: getNumberParam(url, "connection_limit", 5),
+    acquireTimeout: getNumberParam(url, "pool_timeout", 30) * 1000,
+    connectTimeout: getNumberParam(url, "connect_timeout", 10) * 1000,
+  };
+}
+
+const mariaDbConfig = createMariaDbConfig(databaseUrl);
+const adapter = new PrismaMariaDb(mariaDbConfig, { database: mariaDbConfig.database });
+
+if (!globalForPrisma.prismaLogged) {
+  console.info("[prisma] initializing MariaDB pool", {
+    host: mariaDbConfig.host,
+    port: mariaDbConfig.port,
+    database: mariaDbConfig.database,
+    connectionLimit: mariaDbConfig.connectionLimit,
+  });
+  globalForPrisma.prismaLogged = true;
+}
+
+/** Reuse PrismaClient during dev hot reloads so Nuxt does not create duplicate pools. */
+export const prisma =
+  globalForPrisma.prisma ??
+  new PrismaClient({
+    adapter,
+    log: ["warn", "error"],
+  });
+
+if (process.env.NODE_ENV !== "production") {
+  globalForPrisma.prisma = prisma;
+}