diff --git a/api/src/util/route.ts b/api/src/util/route.ts
new file mode 100644
index 00000000..f618a630
--- /dev/null
+++ b/api/src/util/route.ts
@@ -0,0 +1,76 @@
+import { DiscordApiErrors, Event, EventData, getPermission, PermissionResolvable, Permissions } from "@fosscord/util";
+import { NextFunction, Request, Response } from "express";
+import fs from "fs";
+import path from "path";
+import Ajv from "ajv";
+import { AnyValidateFunction } from "ajv/dist/core";
+import { FieldErrors } from "..";
+import addFormats from "ajv-formats";
+
+const SchemaPath = path.join(__dirname, "..", "..", "assets", "schemas.json");
+const schemas = JSON.parse(fs.readFileSync(SchemaPath, { encoding: "utf8" }));
+export const ajv = new Ajv({
+ allErrors: true,
+ parseDate: true,
+ allowDate: true,
+ schemas,
+ messages: true,
+ strict: true,
+ strictRequired: true
+});
+addFormats(ajv);
+
+declare global {
+ namespace Express {
+ interface Request {
+ permission?: Permissions;
+ }
+ }
+}
+
+export type RouteSchema = string; // typescript interface name
+export type RouteResponse = { status?: number; body?: RouteSchema; headers?: Record<string, string> };
+
+export interface RouteOptions {
+ permission?: PermissionResolvable;
+ body?: RouteSchema;
+ response?: RouteResponse;
+ example?: {
+ body?: any;
+ path?: string;
+ event?: EventData;
+ headers?: Record<string, string>;
+ };
+}
+
+export function route(opts: RouteOptions) {
+ var validate: AnyValidateFunction<any>;
+ if (opts.body) {
+ // @ts-ignore
+ validate = ajv.getSchema(opts.body);
+ if (!validate) throw new Error(`Body schema ${opts.body} not found`);
+ }
+
+ return async (req: Request, res: Response, next: NextFunction) => {
+ if (opts.permission) {
+ const required = new Permissions(opts.permission);
+ const permission = await getPermission(req.user_id, req.params.guild_id, req.params.channel_id);
+ console.log(required.bitfield, permission.bitfield, permission.bitfield & required.bitfield);
+
+ // bitfield comparison: check if user lacks certain permission
+ if (!permission.has(required)) {
+ throw DiscordApiErrors.MISSING_PERMISSIONS.withParams(opts.permission as string);
+ }
+
+ if (validate) {
+ const valid = validate(req.body);
+ if (!valid) {
+ const fields: Record<string, { code?: string; message: string }> = {};
+ validate.errors?.forEach((x) => (fields[x.instancePath] = { code: x.keyword, message: x.message || "" }));
+ throw FieldErrors(fields);
+ }
+ }
+ }
+ next();
+ };
+}
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