const crypto = require('crypto');

module.exports = function DocCMSUniqueID(file) {
    if (typeof file !== "undefined") {
        salt = file;
    } else {
        salt = crypto.randomBytes(64).toString("hex");
    }
    
    switch (config.pages_id_generator) {
        case "snowflake":
        default:        
            return parseInt(crypto.createHash("sha512").update(salt, "utf-8").digest("hex").substring(0, 16), 16).toString().substring(0, 18);
        
        case "md5":
            return crypto.createHash("md5").update(salt, "utf-8").digest("hex");

        case "sha256":
            return crypto.createHash("sha256").update(salt, "utf-8").digest("hex");
    }
}