ESLint custom rule to ensure TODO comments to follow a specific format

index.js

module.exports = {
    meta: {
        docs: {
            description: 'requires a TODO to be specified either with a task number or URL and a message',
            category: 'Best Practices',
            recommended: true
        },
        schema: []
    },

    create: function(context) {
        // If comment starts with `TODO` it is considered worth parsing
        function isValidTodo(node) {
            var value = node.value.replace(/\/|\\|\*/gm, '').trim();
            var isValid = /^todo/i.test(value);

            return isValid;
        }

        // Check if todo has both ticket id/url and a message
        function isVagueTodo(node) {
            var valueWithoutTodo = node.value.replace(/^todo\s/i, '');
            var isVague = /\((.+)\)\s?(\w+)/m.test(valueWithoutTodo);

            return !isVague;
        }

        function checkForVagueTodos(node) {
            if (isValidTodo(node)) {
                if (isVagueTodo(node)) {
                    context.report(
                        node,
                        'You must specify either a task number or URL and a message for every TODO'
                    );
                }
            }
        }

        return {
            LineComment: checkForVagueTodos,
            BlockComment: checkForVagueTodos
        };
    }
};