feat(decorators): add simple decorator

.eslintrc

@@ -23,6 +23,7 @@
         "no-underscore-dangle": "off",
         "import/prefer-default-export": "off",
         "consistent-return": "off",
+        "arrow-body-style": "off",
         "no-restricted-syntax": "off"
     }
 }

src/lib/utils/decorators.ts

@@ -0,0 +1,25 @@
+import { Error as ImpError } from "../errors";
+import { Base } from "../client/Base";
+/**
+ *  Check if the client has a token provided
+ *  @internal
+ */
+export const requireToken: MethodDecorator = (_target, _key, descriptor) => {
+	const originalMethod = descriptor.value as unknown as Function;
+
+	if (!originalMethod) {
+		throw new Error("Method not provided!?");
+	}
+
+	return {
+		value: function value(...args: any[]) {
+			if (!(this instanceof Base)) {
+				throw new Error("type check");
+			}
+
+			if (!this.client._token) throw new ImpError("NO_TOKEN");
+
+			return originalMethod.apply(this, args);
+		},
+	} as any;
+};

tsconfig.json

@@ -17,6 +17,7 @@
         "noImplicitReturns": true,
         "downlevelIteration": true,
         "noUnusedParameters": true,
+        "experimentalDecorators": true,
         "importsNotUsedAsValues": "error",
         "forceConsistentCasingInFileNames": true,
         // false stuff