read and write TextToFile - JSTalk Sketch

readTextFromFile.jstalk

/**
 * Read text from a file at the given path
 * 
 * @param  {string} path  given file path
 * @return {mixed}        string with text if successful, false if error
 */
function readTextFromFile( path )
{
    var result = false;

    if( typeof path !== 'string' )
        return result;

    // use stringWithContentsOfFile to get the text from the file
    var getString = NSString.stringWithContentsOfFile_encoding_error( path, NSUTF8StringEncoding, null );

    if( getString )
        result = getString.toString();

    return result;
}

write2file.jstalk

/*global NSString:false, NSUTF8StringEncoding:false, doc:true */
var filepath = '/Users/urshunkler2/temp',
    filename = 'text.txt',
    path = filepath + '/' + filename,
    string = "Cras vestibulum nulla et eros adipiscing porta.\n" + new Date();

/**
 * Map the JSTalk print method to the Sketch doc.showMessage method
 * @param  {string} message The given message text
 * @return {void}
 */
var print = function (message) {
    doc.showMessage(message);
};

/**
 * Write a given text to a file at the given path
 *
 * @param  {string} text  given text
 * @param  {string} path  given file path
 * @return {boolean}      true if successful
 */
function writeTextToFile(text, path) {
    var result = false;

    if (typeof text !== 'string') {
        return result;
    }
    if (typeof path !== 'string') {
        return result;
    }

    // create a NSString object from the given text
    var nsstring = NSString.instanceWithUTF8String(text);

    // use the writeToFile method of the NSString object to write the text to the given URL
    result = [nsstring writeToFile:path atomically:1 encoding:NSUTF8StringEncoding error:nil];

    if (!result) {
        result = false;
    } else {
        result = true;
    }

    return result;
}

/**
 * Read text from a file at the given path
 *
 * @param  {string} path  given file path
 * @return {mixed}        string with text if successful, false if error
 */
function readTextFromFile (path) {
    var result = false;

    if (typeof path !== 'string') {
        return result;
    }

    // use stringWithContentsOfFile to get the text from the file
    var getString = NSString.stringWithContentsOfFile_encoding_error(path, NSUTF8StringEncoding, nil);

    if (getString) {
        result = getString.toString();
    }

    return result;
}

// write the text to a file
var ok = writeTextToFile(string, path);

if (!ok) {
    print("Error writing file to " + path);
} else {
    // if write was ok read the text back
    var returnedText = readTextFromFile(path);

    if (!returnedText) {
        print("Error reading text from file " + path);
    } else {
        print(returnedText.substr(0, 15));
    }
}

writeTextToFile.jstalk

/**
 * Write a given text to a file at the given path
 * 
 * @param  {string} text  given text
 * @param  {string} path  given file path
 * @return {boolean}      true if successful
 */
function writeTextToFile( text, path )
{
    var result = false;

    if( typeof text !== 'string' )
        return result;
    if( typeof path !== 'string' )
        return result;

    // create a NSString object from the given text
    var nsstring = NSString.instanceWithUTF8String( text );

    // use the writeToFile method of the NSString object to write the text to the given URL
    result = [nsstring writeToFile:path atomically:1 encoding:NSUTF8StringEncoding error:null];
    
    if( !result )
    {
        result = false;
    }
    else
    {
        result = true;
    }

    return result;
}