drag n drop

public/js/index.js

@@ -0,0 +1,89 @@
+function copyURI(evt) {
+	evt.preventDefault();
+    navigator.clipboard.writeText(absolutePath(evt.target.getAttribute('src'))).then(() => {
+      /* clipboard successfully set */
+      console.log("copied")
+    }, () => {
+      /* clipboard write failed */
+      console.log("failed")
+    });
+}
+
+function absolutePath (href) {
+	let link = document.createElement("a");
+	link.href = href;
+	return link.href;
+}
+
+let dropArea = document.getElementById("dropArea");
+
+;['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
+  dropArea.addEventListener(eventName, preventDefaults, false)
+})
+
+function preventDefaults (e) {
+  e.preventDefault()
+  e.stopPropagation()
+}
+
+;['dragenter', 'dragover'].forEach(eventName => {
+  dropArea.addEventListener(eventName, highlight, false)
+})
+
+;['dragleave', 'drop'].forEach(eventName => {
+  dropArea.addEventListener(eventName, unhighlight, false)
+})
+
+function highlight(e) {
+  dropArea.classList.add('highlight')
+}
+
+function unhighlight(e) {
+  dropArea.classList.remove('highlight')
+}
+
+dropArea.addEventListener('drop', handleDrop, false)
+
+function handleDrop(e) {
+  let dt = e.dataTransfer
+  let files = dt.files
+  handleFiles(files)
+}
+
+function handleFiles(files) {
+  files = [...files]
+  files.forEach(uploadFile)
+  files.forEach(previewFile)
+}
+
+
+function previewFile(file) {
+  let reader = new FileReader()
+  reader.readAsDataURL(file)
+  reader.onloadend = function() {
+    let img = document.createElement('img');
+    img.src = reader.result
+    img.className = "image";
+    document.getElementById('gallery').appendChild(img)
+    console.log(document.getElementById('fileupload'))
+    document.getElementById('fileupload').src = img.src;
+  }
+}
+
+function uploadFile(file) {
+  let xhr = new XMLHttpRequest();
+  let formData = new FormData();
+  xhr.open('POST', '/', true);
+
+  xhr.addEventListener('readystatechange', function(e) {
+    if (xhr.readyState == 4 && xhr.status == 200) {
+      location.reload();
+    }
+    else if (xhr.readyState == 4 && xhr.status != 200) {
+      // Error. Inform the user
+    }
+  })
+
+  formData.append('fileupload', file);
+  xhr.send(formData)
+}