/*
        Clean Form Validation was written from scratch by Marc Grabanski
        http://marcgrabanski.com
*/

var cleanValidator = {
        init: function (settings) {
                this.settings = settings;
                this.form = document.getElementById(this.settings["formId"]);
                formInputs = this.form.getElementsByTagName("input");

                // change color of inputs on focus
                for(i=0;i<formInputs.length;i++)
                {
                        if(formInputs[i].getAttribute("type") != "submit") {
                                input = formInputs[i];
                                input.style.background = settings["inputColors"][0];
                                input.onblur = function () {
                                        this.style.background = settings["inputColors"][0];
                                }
                                input.onfocus = function () {
                                        this.style.background = settings["inputColors"][1];
                                }
                        }
                };
                this.form.onsubmit = function () {
                        error = cleanValidator.validate();
                        if(error.length < 1) {
                                return true;
                        } else {
                                cleanValidator.printError(error);
                                return false;
                        }
                };
        },
        validate: function () {
                error = '';
                validationTypes = new Array("isRequired", "isEmail", "isNumeric");
                for(n=0; n<validationTypes.length; n++) {
                        var x = this.settings[validationTypes[n]];
                        var vartext = new Array("Topic Subject:", "File to upload:", "Category list:");

                        if(x != null) {
                                for(i=0; i<x.length; i++)
                                {
                                        inputField = document.getElementById(x[i]);
                                        switch (validationTypes[n]) {
                                                case "isRequired" :
                                                valid = !isRequired(inputField.value);
                                                errorMsg = "is a required field.";
                                                break;
                                                case "isEmail" :
                                                valid = isEmail(inputField.value);
                                                errorMsg = "is an invalid email address.";
                                                break;
                                                case "isNumeric" :
                                                valid = isNumeric(inputField.value);
                                                errorMsg = "can only be a number.";
                                                break;
                                        }


                                        if(!valid) {
//                                                 error += vartext[i]+" "+errorMsg+"\n";
                                                error += x[i]+" "+errorMsg+"\n";
                                                inputField.style.background = this.settings["errorColors"][0];
                                                inputField.style.border = "1px solid "+this.settings["errorColors"][1];
                                        } else {
                                                inputField.style.background = this.settings["inputColors"][0];
                                                inputField.style.border = '1px solid';
                                        }
                                }
                        }
                }
                return error;
        },
        printError: function (error) {
                alert(error);
        }
};

// returns true if the string is not empty
function isRequired(str){
        return (str == null) || (str.length == 0);
}
// returns true if the string is a valid email
function isEmail(str){
        if(isRequired(str)) return false;
        var re = /^[^\s()<>@,;:\/]+@\w[\w\.-]+\.[a-z]{2,}$/i
        return re.test(str);
}
// returns true if the string only contains characters 0-9 and is not null
function isNumeric(str){
        if(isRequired(str)) return false;
        var re = /[\D]/g
        if (re.test(str)) return false;
        return true;
}