book.js
4.8 KB
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;(function () {
var id = 0;
var preview = '';
var description = '';
var title = '';
var image = null;
var data = {
type: '',
value : ''
};
imageFile = null;
var maxFileSize = 3000000;
var types = [
'image/png',
'image/jpeg',
'image/jpg',
'image/gif'
];
var fileInput = document.getElementById('image');
var titleSelector = document.getElementById('title');
var previewSelector = document.getElementById('preview');
var descriptionSelector = document.getElementById('description');
var removeFileSelector = document.getElementsByClassName('remove-img-file')[0];
var buttonAdd = document.getElementById('add');
function book(){
}
function init(string) {
var st = string.replace(/\n/g, "\\\\n")
.replace(/\r/g, "\\\\r")
.replace(/\t/g, "\\\\t");
data = JSON.parse(st);
console.log(data);
if (data.length > 0){
title = data.title;
description = data.description;
preview = data.preview;
image = data.image;
id = data.id;
}
}
titleSelector.addEventListener('blur', function(e) {
e.preventDefault();
addState(titleSelector);
});
previewSelector.addEventListener('blur', function(e) {
e.preventDefault();
addState(previewSelector);
});
descriptionSelector.addEventListener('blur', function(e) {
e.preventDefault();
addState(descriptionSelector);
});
fileInput.addEventListener('change', function(event){
event.preventDefault();
var file = event.target.files[0];
if(validateFiles(file)){
displayImage(file);
}
});
buttonAdd.addEventListener('click', function(event) {
event.preventDefault();
if (validateForm()){
sendData();
} else{
return false;
}
});
removeFileSelector.addEventListener('click', function(event) {
console.log('remove');
event.preventDefault();
document.getElementsByClassName('img-file')[0].classList.remove('vis_');
imageFile = null;
});
function validateFiles(file) {
if (types.indexOf(file.type) !== -1 && file.size < maxFileSize) {
return true;
}else{
return false;
}
}
function displayImage(file) {
var fr = new FileReader();
console.log(fr);
fr.onload = (function(file) {
return function() {
console.log(this.result);
var selector = $(".img-file");
selector.find('img').attr('src', this.result);
selector.addClass('vis_');
}
})(file);
fr.readAsDataURL(file);
imageFile = file;
}
function addState(selector) {
data.type = selector.getAttribute('id');
data.value = selector.value;
updateState(data);
}
function updateState(data) {
if (data.type === 'title'){
title = data.value;
console.log('test');
}
if (data.type === 'description'){
description = data.value;
}
if (data.type === 'preview'){
preview = data.value;
}
}
function validateForm() {
errors = document.querySelectorAll('.has-error');
for(var i = 0; i < errors.length; i++){
var error = errors[i];
error.parentNode.removeChild(error);
}
var count = 0;
if (title === '') {
titleSelector.insertAdjacentHTML('afterend', "<div class='has-error'>Укажите название книги</div>");
count++;
}
if (preview === '') {
previewSelector.insertAdjacentHTML('afterend', "<div class='has-error'>Укажите краткое описание книги</div>");
count++;
}
if (count > 0) {
return false;
} else {
return true;
}
}
function sendData() {
var xhr = new XMLHttpRequest();
var url = '/book/add';
if (id != 0){
url = '/book/edit?id='+id;
}
xhr.open('POST', url, true);
var data = new FormData();
console.log(image);
data.append('title', title);
data.append('description', description);
data.append('preview', preview);
data.append('file', imageFile);
if (image != null){
data.append('image', image);
}
xhr.onreadystatechange = function() {
if (xhr.readyState === XMLHttpRequest.DONE) {
window.location = '/book/success';
}
};
xhr.send(data);
}
window.book = book;
book.init = init;
}());