/**
 *
 * @param {any} str
 */
function log(str) {
    console.log(JSON.stringify(str, undefined, 4))
}

/**
 * convert object to string
 * @param {any} obj object
 */
function obj2str(obj) {
    if (Array.isArray(obj)) {
        return JSON.stringify(
            obj.map(function (idx) {
                return obj2str(idx)
            })
        )
    } else if (typeof obj === "object" && obj !== null) {
        var elements = Object.keys(obj)
            .sort()
            .map(function (key) {
                var val = obj2str(obj[key])
                if (val) {
                    return key + ":" + val
                }
            })

        var elementsCleaned = []
        for (var i = 0; i < elements.length; i++) {
            if (elements[i]) elementsCleaned.push(elements[i])
        }

        return "{" + elementsCleaned.join("|") + "}"
    }

    if (obj) return obj
}

/**
 * clear SSR cache
 */
function clearSSRCache() {
    var info = context.db.deleteMany("ssr", {})
    context.response.header("X-SSR-Cleared", info.removed)
}

module.exports = {
    log,
    clearSSRCache,
    obj2str,
}