// Encoding: UTF-8
"use strict";


$(function(){
    $("form ").submit(function() {
        return verify_form();
    });
});

/**
 * verify_form
 * verify if the email provided is correct
 * @param boolean
 */
function verify_form(){
    $("#submit_btn").hide();
    // check if there is at least one joint
    if (!isActivityFilled() || !isInterestFilled() || !isCaptchaFilled()) {
        $("#submit_btn").show();
        return false;
    }
    return true;
}

function isActivityFilled () {
    return atLeastOneCheckboxTicked('#activityGroup', 'At least one activity must be chosen');
}

function isInterestFilled () {
    return atLeastOneCheckboxTicked('#interestGroup', 'At least one interest must be chosen');
}

function atLeastOneCheckboxTicked(checkboxGroupName, errorMessage){
    if ($(checkboxGroupName + ' :checkbox:checked').length > 0){
        return true;
    } else {
        alert(errorMessage);
        return false;
    }
}