106 lines
2.9 KiB
JavaScript
Executable File
106 lines
2.9 KiB
JavaScript
Executable File
/* загрузчик изображений */
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// ************************ Drag and drop ***************** //
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let dropArea = document.getElementById("drop-area")
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// Prevent default drag behaviors
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;
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['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
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dropArea.addEventListener(eventName, preventDefaults, false)
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document.body.addEventListener(eventName, preventDefaults, false)
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})
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// Highlight drop area when item is dragged over it
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;
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['dragenter', 'dragover'].forEach(eventName => {
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dropArea.addEventListener(eventName, highlight, false)
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})
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;
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['dragleave', 'drop'].forEach(eventName => {
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dropArea.addEventListener(eventName, unhighlight, false)
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})
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// Handle dropped files
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dropArea.addEventListener('drop', handleDrop, false)
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function preventDefaults(e) {
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e.preventDefault()
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e.stopPropagation()
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}
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function highlight(e) {
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dropArea.classList.add('highlight')
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}
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function unhighlight(e) {
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dropArea.classList.remove('active')
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}
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function handleDrop(e) {
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var dt = e.dataTransfer
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var files = dt.files
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handleFiles(files)
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}
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let uploadProgress = []
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let progressBar = document.getElementById('progress-bar')
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function initializeProgress(numFiles) {
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progressBar.value = 0
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uploadProgress = []
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for (let i = numFiles; i > 0; i--) {
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uploadProgress.push(0)
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}
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}
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function updateProgress(fileNumber, percent) {
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uploadProgress[fileNumber] = percent
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let total = uploadProgress.reduce((tot, curr) => tot + curr, 0) / uploadProgress.length
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console.debug('update', fileNumber, percent, total)
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progressBar.value = total
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}
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function handleFiles(files) {
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files = [...files]
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initializeProgress(files.length)
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files.forEach(uploadFile)
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files.forEach(previewFile)
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}
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function previewFile(file) {
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let reader = new FileReader()
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reader.readAsDataURL(file)
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reader.onloadend = function() {
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let img = document.createElement('img')
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img.src = reader.result
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document.getElementById('gallery').appendChild(img)
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}
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}
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function uploadFile(file, i) {
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var url = '/act/page'
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var xhr = new XMLHttpRequest()
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var formData = new FormData()
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xhr.open('POST', url, true)
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xhr.setRequestHeader('X-Requested-With', 'XMLHttpRequest')
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// Update progress (can be used to show progress indicator)
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xhr.upload.addEventListener("progress", function(e) {
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updateProgress(i, (e.loaded * 100.0 / e.total) || 100)
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})
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xhr.addEventListener('readystatechange', function(e) {
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if (xhr.readyState == 4 && xhr.status == 200) {
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updateProgress(i, 100) // <- Add this
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} else if (xhr.readyState == 4 && xhr.status != 200) {
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// Error. Inform the user
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}
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})
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formData.append('upload_preset', 'ujpu6gyk')
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formData.append('act', 'upload')
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formData.append('file', file)
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xhr.send(formData)
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} |