optimizely-oui/src/utils/filter.js

Optimizely's Component Library.

/**
 * Returns true if item is not a valid string or is empty when trimmed
 * @param {string} itemToCheck
 * - The item to check and evaluate for filter function validity. Must be of
 *   type string and truthy when trimmed
 * @returns {boolean}
 */
function isNotValidString(itemToCheck) {
    return typeof itemToCheck !== "string" || (typeof itemToCheck === "string" && !itemToCheck.trim());
}

/**
 * Searches a string for an occurrence of a filtering string (case insensitive)
 *  - Filtering a complex object? Consider implementing a filter with an
 *    approach similar to FilterPicker, where item key values are joined
 *    in a string and passed in as contentToSearch
 * @param {string} stringToFind
 * - The term to find, split into separate search terms by spaces
 * @param {string} contentToSearch
 * - The content to search for the filter term
 * @returns {boolean}
 */
export function isFilterTermInItem(stringToFind, contentToSearch) {
    if (isNotValidString(contentToSearch)) {
        return false;
    }

    if (isNotValidString(stringToFind)) {
        return true;
    }

    const filters = stringToFind.match(/\S+/g) || [];
    for (let i = 0; i < filters.length; i++) {
        if (contentToSearch.toLocaleLowerCase().indexOf(filters[i].toLocaleLowerCase()) === -1) {
            return false;
        }
    }
    return true;
}