improvement: moved user data from localstorage to context

frontend/src/components/Can/index.js

@@ -0,0 +1,39 @@
+import rules from "../../accessRules";
+
+const check = (rules, role, action, data) => {
+	const permissions = rules[role];
+	if (!permissions) {
+		// role is not present in the rules
+		return false;
+	}
+
+	const staticPermissions = permissions.static;
+
+	if (staticPermissions && staticPermissions.includes(action)) {
+		// static rule not provided for action
+		return true;
+	}
+
+	const dynamicPermissions = permissions.dynamic;
+
+	if (dynamicPermissions) {
+		const permissionCondition = dynamicPermissions[action];
+		if (!permissionCondition) {
+			// dynamic rule not provided for action
+			return false;
+		}
+
+		return permissionCondition(data);
+	}
+	return false;
+};
+
+const Can = ({ role, perform, data, yes, no }) =>
+	check(rules, role, perform, data) ? yes() : no();
+
+Can.defaultProps = {
+	yes: () => null,
+	no: () => null,
+};
+
+export default Can;