// =========================
// Utilities
// =========================
var utils = utils || {};

// ========================================
// Load template file into the DOM webpage
// Params:
//  url  - url to the template file (starting from the index.html directory)
//  args - parameters to be put into the template, on the template mark
//         them with double curly braces like: {{argumentName}}
//  override - OPTIONAL override the previous template ( default: false )
//  callback - OPTIONAL callback function run after template is loaded
//
// ========================================
utils.loadTemplate = (function(f,u,n,c){
    var $templateDom = $('#dynamic-template'),
          $ajaxCall;

    if( typeof n === 'function' && typeof c === 'undefined' ) c = n;

    $ajaxCall = $.get(f).success(function(response){
        var mustachedTemplate = Mustache.render(response,u);

        if( n === true ){
            $templateDom.html(mustachedTemplate);
        } else {
            $templateDom.append(mustachedTemplate);
        }

        if( typeof c === 'function' ){
            c(mustachedTemplate);
        }

    }).fail(function(response){
        console.warn('Template error',response);

    });

    return true;
});

// ========================================
// Load a json file from the back-end ( via GET )
// Params:
//  url  - url/path to the external, back-end server
//  callback - OPTIONAL callback function for the request
//
// ========================================
utils.getData = utils.loadJSON = (function(f,u){
    var $ajaxCall,
            json;

    $ajaxCall = $.get(f).success(function(response){
        if( typeof response === 'String'){
            try {
                json = JSON.parse(response);
            } catch(exception){
                console.warn('JSON error',exception);
            }
        } else {
            json = response;
        }

        if( typeof u === 'function' ){
            u( json || null );
        }
    }).fail(function(response){
        console.warn('JSON error',response);

    });
});

// ========================================
// Send data to the back-end ( via POST )
// Params:
//  url  - url/path to the external, back-end server
//  data - parameters sent to the back-end
//  callback - OPTIONAL function called after the back-end responds
//
// ========================================
utils.sendData = utils.sendJSON = (function(f,u,n){
    var $ajaxCall;

    $ajaxCall = $.post(f,u).success(function(response){
        if( typeof response === 'String'){
            try {
                json = JSON.parse(response);
            } catch(exception){
                console.warn('JSON error',exception);
            }
        } else {
            json = response;
        }

        if( typeof u === 'function' ){
            u( json || null );
        }
    }).fail(function(response){
        console.warn('POST error',response);

    });
});