/**
 * Convert a color to message string
 * @function color
 * @param {string|number} value Color to convert
 * @return {string} Converted color
 */
function color (value) {
    "use strict";

    return value ? value : "none";
}

/**
 * Convert a boolean value to message string
 * @function bool
 * @param {bool} value Boolean to convert
 * @return {string} Converted boolean
 */
function bool (value) {
    "use strict";

    return value ? "T" : "F";
}

/**
 * Convert a position to message string
 * @function position
 * @param {number} line Line of position starting with 1
 * @param {number} col Column of position starting with 0
 * @return {string} Converted position
 */
function position (pos) {
    "use strict";

    if (Array.isArray(pos)) {
        return pos[0]+"/"+pos[1];    
    }
    else {
        return pos;
    }
}

/**
 * Convert a string to message string
 * @function string
 * @param {string} value String to convert
 * @return {string} Converted string
 */
function string (value) {
    "use strict";

    var buffer = "\"";

    for (var i = 0 ; i < value.length ; ++i){
        switch (value[i]) {
            case "\n" :
                buffer += "\\n";
            break;
            case "\t" :
                buffer += "\\t";
            break;
            case "\r" :
                buffer += "\\r";
            break;
            case "\\" : 
                buffer += "\\\\";
            break;
            case "\"" :
                buffer += "\\\"";
            break;
            default :
                buffer += value[i];
            break;

        }
    } 

    buffer += "\"";
    return buffer;
}

module.exports.string = string;
module.esports.color = color;
module.exports.position = position;
module.exports.bool = bool;