Add new oauth matching function with tests for it

utils/oauth.ts

@@ -0,0 +1,61 @@
+import { Application } from "@prisma/client";
+
+/**
+ * Check if an OAuth application is valid for a route
+ * @param application The OAuth application
+ * @param routeScopes The scopes required for the route
+ * @returns Whether the OAuth application is valid for the route
+ */
+export const checkIfOauthIsValid = (
+	application: Application,
+	routeScopes: string[]
+) => {
+	if (routeScopes.length === 0) {
+		return true;
+	}
+
+	const hasAllWriteScopes =
+		application.scopes.split(" ").includes("write:*") ||
+		application.scopes.split(" ").includes("write");
+
+	const hasAllReadScopes =
+		application.scopes.split(" ").includes("read:*") ||
+		application.scopes.split(" ").includes("read");
+
+	if (hasAllWriteScopes && hasAllReadScopes) {
+		return true;
+	}
+
+	let nonMatchedScopes = routeScopes;
+
+	if (hasAllWriteScopes) {
+		// Filter out all write scopes as valid
+		nonMatchedScopes = routeScopes.filter(
+			scope => !scope.startsWith("write:")
+		);
+	}
+
+	if (hasAllReadScopes) {
+		// Filter out all read scopes as valid
+		nonMatchedScopes = routeScopes.filter(
+			scope => !scope.startsWith("read:")
+		);
+	}
+
+	// If there are still scopes left, check if they match
+	// If there are no scopes left, return true
+	if (nonMatchedScopes.length === 0) {
+		return true;
+	}
+
+	// If there are scopes left, check if they match
+	if (
+		nonMatchedScopes.every(scope =>
+			application.scopes.split(" ").includes(scope)
+		)
+	) {
+		return true;
+	}
+
+	return false;
+};