Initial commit

src/config.ts

@@ -0,0 +1,47 @@
+import "dotenv/config";
+import z, { ZodError, ZodIssueCode } from "zod";
+
+function parseJsonSafe(path: string) {
+    return (value: unknown) => {
+        try {
+            return JSON.parse(String(value));
+        } catch {
+            throw new ZodError([
+                {
+                    code: ZodIssueCode.custom,
+                    path: [path],
+                    fatal: true,
+                    message: "Invalid JSON",
+                },
+            ]);
+        }
+    };
+}
+
+const configSchema = z.object({
+    NODE_ENV: z.enum(["development", "production"]),
+    LOG_LEVEL: z
+        .enum(["trace", "debug", "info", "warn", "error", "fatal", "silent"])
+        .default("info"),
+    BOT_TOKEN: z.string(),
+    BOT_ADMIN_USER_ID: z
+        .preprocess(
+            parseJsonSafe("BOT_ADMIN_USER_ID"),
+            z.array(z.coerce.number().safe()).or(z.coerce.number().safe()),
+        )
+        .transform((v) => (Array.isArray(v) ? v : [v]))
+        .default([]),
+});
+
+const parseConfig = (environment: NodeJS.ProcessEnv) => {
+    const config = configSchema.parse(environment);
+
+    return {
+        ...config,
+        isDev: process.env.NODE_ENV === "development",
+        isProd: process.env.NODE_ENV === "production",
+    };
+};
+
+export type Config = ReturnType<typeof parseConfig>;
+export const config = parseConfig(process.env);