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phpbb-avatars.js
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281 lines (242 loc) · 7.86 KB
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/* global phpbb */
(function($) { // Avoid conflicts with other libraries
'use strict';
/**
* phpBB Avatars namespace.
*
* Handles cropping for local file uploads.
*/
phpbb.avatars = {
cropper: null,
image: null,
/** @type {jQuery} */
$form: null,
/** @type {jQuery} */
$buttons: $('#avatar-cropper-buttons'),
/** @type {jQuery} */
$box: $('.c-avatar-box'),
/** @type {jQuery} */
$data: $('#avatar-cropper-data'),
/** @type {jQuery} */
$input: $('#avatar_upload_file'),
/** @type {jQuery} */
$driver: $('#avatar_driver'),
/** @type {string} */
driverUpload: 'avatar_driver_upload',
/**
* Initialise avatar cropping.
*/
init() {
// If the cropper library is not available
if (!$.isFunction($.fn.cropper)) {
return;
}
// Correctly position the cropper buttons
this.$buttons.appendTo(this.$box);
// Ensure we have an img for the cropping
if (this.$box.children('img').length === 0) {
const $avatarImg = $('<img src="" alt="">');
$avatarImg.setAttribute('width', phpbb.avatars.$data.data().maxWidth);
$avatarImg.setAttribute('height', phpbb.avatars.$data.data().maxHeight);
$avatarImg.addClass('avatar');
this.image = $avatarImg;
this.$box.prepend($avatarImg);
} else {
this.image = this.$box.children('img');
}
this.bindInput();
this.bindSelect();
this.bindSubmit();
},
/**
* Destroy (undo) any initialisation.
*/
destroy() {
this.$buttons.find('[data-cropper-action]').off('click.phpbb.avatars');
this.image.off('crop.phpbb.avatars');
this.$form.off('submit');
this.$data.val('');
this.$buttons.hide();
this.$box.removeClass('c-cropper-avatar-box');
if (this.cropper !== null) {
this.cropper.destroy();
}
},
/**
* Bind a function to the avatar driver <select> element.
*
* If a different driver than the "upload" driver is selected, the cropper is destroyed.
* Otherwise if the "upload" driver is (re-)selected, and it has a value, initialise it.
*/
bindSelect() {
this.$driver.on('change', function() {
if ($(this).val() === phpbb.avatars.driverUpload) {
if (phpbb.avatars.$input.val() !== '') {
phpbb.avatars.$input.trigger('change');
}
} else {
phpbb.avatars.destroy();
}
});
},
/**
* Bind a function to the avatar file upload <input> element.
*
* If a file was chosen and it is a valid image file, the cropper is initialised.
* Otherwise the cropper is destroyed.
*/
bindInput() {
this.$input.on('change', function() {
const fileReader = new FileReader();
if (this.files[0].type.match('image.*')) {
fileReader.readAsDataURL(this.files[0]);
fileReader.addEventListener('load', function() {
phpbb.avatars.image.cropper('destroy').attr('src', this.result).addClass('avatar');
phpbb.avatars.$box.addClass('c-cropper-avatar-box');
phpbb.avatars.initCropper();
phpbb.avatars.initButtons();
});
} else {
phpbb.avatars.destroy();
}
});
},
/**
* Bind submit button to be handled by ajax submit
*/
bindSubmit() {
const $this = this;
$this.$form = this.$input.closest('form');
$this.$form.on('submit', () => {
const data = phpbb.avatars.$data.data();
const avatarCanvas = phpbb.avatars.cropper.getCroppedCanvas({
maxWidth: 4096, // High values for max quality cropping
maxHeight: 4096, // High values for max quality cropping
});
// eslint-disable-next-line no-undef
const hermiteResize = new Hermite_class();
hermiteResize.resample_single(avatarCanvas, data.maxWidth, data.maxHeight, true);
avatarCanvas.toBlob(blob => {
const formData = new FormData($this.$form[0]);
formData.set('avatar_upload_file', blob, $this.getUploadFileName());
formData.set('submit', '1');
const canvasDataUrl = avatarCanvas.toDataURL('image/png');
$.ajax({
url: $this.$form.attr('action'),
type: 'POST',
data: formData,
processData: false,
contentType: false,
success(response) {
$this.uploadDone(response, canvasDataUrl);
},
error() {
console.log('Upload error');
},
});
}, 'image/png');
return false;
});
},
/**
* Get upload filename for the blob data
*
* As the blob data is always in png format, we'll replace the file
* extension in the upload name with one that ends with .png
*
* @return {string} Upload file name
*/
getUploadFileName() {
const originalName = this.$input[0].files[0].name;
return originalName.replace(/\.[^/\\.]+$/, '.png');
},
/**
* Handle response from avatar submission
* @param {Object} response AJAX response object
* @param {string} canvasDataUrl Uploaded canvas element as data URL
*/
uploadDone(response, canvasDataUrl) {
if (typeof response !== 'object') {
return;
}
// Handle errors while deleting file
if (typeof response.error === 'undefined') {
const alert = phpbb.alert(response.MESSAGE_TITLE, response.MESSAGE_TEXT);
setTimeout(() => {
window.location = response.REFRESH_DATA.url.replace('&', '&');
alert.hide();
}, response.REFRESH_DATA.time * 1000);
phpbb.avatars.image.attr('src', canvasDataUrl);
phpbb.avatars.destroy();
} else {
phpbb.alert(response.error.title, response.error.messages.join('<br>'));
}
},
/**
* Bind a function to all the cropper <button> elements.
*
* Only buttons with a data-cropper-action attribute are recognized.
* The value for this data attribute should be a function available in the cropper.
* It also takes two optional parameters, imploded by a comma.
* For example: data-cropper-action="move,0,10" which results in $().cropper('move', 0, 10)
*/
initButtons() {
this.$buttons.show().find('[data-cropper-action]').off('click.phpbb.avatars').on('click.phpbb.avatars', function() {
const option = $(this).data('cropper-action').split(',');
const action = option[0];
if (typeof phpbb.avatars.cropper[action] === 'function') {
// Special case: flip, set it to the opposite value (-1 and 1).
if (action === 'scaleX' || action === 'scaleY') {
phpbb.avatars.image.cropper(action, -phpbb.avatars.cropper.getData(true)[action]);
} else {
phpbb.avatars.image.cropper(action, option[1], option[2]);
}
}
});
},
/**
* Initialise the cropper (CropperJS).
*
* @see https://github.com/fengyuanchen/cropperjs
*
* This creates a cropper instance with a 1 to 1 (square) aspect ratio,
* automatically creates the maximum available and allowed cropping area,
* and registers a callback function for the 'crop' event.
*/
initCropper() {
this.cropper = this.image.cropper({
aspectRatio: 1,
autoCropArea: 1,
}).data('cropper');
this.image.off('crop.phpbb.avatars').on('crop.phpbb.avatars', phpbb.avatars.onCrop);
},
/**
* The callback function for the 'crop' event.
*
* This function ensures that the crop area is within the configured dimensions.
* Meaning the width and height can not exceed the limits set by an Administrator.
*
* It also JSON encodes the data array and places it into an <input> element,
* which will be requested server side, and crop the image accordingly.
* Image cropping is done server side, to ensure the best image quality
* and image blobs (from .toBlob()) can only be send through AJAX requests.
*
* @param {object} event
*/
onCrop(event) {
const data = phpbb.avatars.$data.data();
let { width, height } = event.detail;
if (width < data.minWidth || height < data.minHeight) {
width = Math.max(data.minWidth, Math.min(data.maxWidth, width));
height = Math.max(data.minHeight, Math.min(data.maxHeight, height));
phpbb.avatars.cropper.setData({
width,
height,
});
}
},
};
$(() => {
phpbb.avatars.init();
});
})(jQuery); // Avoid conflicts with other libraries