From f56961b2453c0cb0a596d58c3f5c368bdad1d56f Mon Sep 17 00:00:00 2001
From: Daniela Arcese <dnarcese@gmail.com>
Date: Fri, 2 Jun 2017 16:56:32 -0400
Subject: [PATCH] file list ui

---
 public/upload.js | 147 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 public/upload.js

diff --git a/public/upload.js b/public/upload.js
new file mode 100644
index 00000000..1bc87b7a
--- /dev/null
+++ b/public/upload.js
@@ -0,0 +1,147 @@
+function onChange(event) {
+  var file = event.target.files[0];
+  var reader = new FileReader();
+  reader.onload = function(event) {
+    let self = this;
+    window.crypto.subtle.generateKey({
+      name: "AES-CBC",
+      length: 128
+    },
+    true,
+    ["encrypt", "decrypt"])
+    .then(function(key){
+      var arrayBuffer = self.result;
+      var array = new Uint8Array(arrayBuffer);
+
+      var random_iv = window.crypto.getRandomValues(new Uint8Array(16));
+
+      window.crypto.subtle.encrypt({
+        name: "AES-CBC",
+        iv: random_iv },
+        key,
+        array)
+        .then(function(encrypted){
+          var dataView = new DataView(encrypted);
+          var blob = new Blob([dataView], { type: file.type });
+
+          var fd = new FormData();
+          fd.append("fname", file.name);
+          fd.append("data", blob, file.name);
+
+          var xhr = new XMLHttpRequest();
+          var hex = ivToStr(random_iv);
+          xhr.open("post", "/upload/" + hex, true);
+
+          var row = document.createElement("tr");
+          var name = document.createElement("td");
+          var link = document.createElement("td");
+          var expiry = document.createElement("td");
+
+          var cellText = document.createTextNode(file.name);
+          //name.innerHTML = file.name;
+          name.appendChild(cellText);
+
+          var progress = document.createElement("p");
+          //li.appendChild(progress);
+          row.appendChild(name);
+          row.appendChild(link);
+          row.appendChild(expiry);
+          document.getElementById("uploaded-files").appendChild(row);
+
+
+          xhr.upload.addEventListener("progress", returnBindedLI(progress, name, link, row));
+
+          xhr.onreadystatechange = function() {
+            if (xhr.readyState == XMLHttpRequest.DONE) {
+              window.crypto.subtle.exportKey("jwk", key).then(function(keydata) {
+                var curr_name = localStorage.getItem(file.name);
+
+                localStorage.setItem(hex, xhr.responseText);
+
+                link.innerHTML = "http://localhost:3000/download/" + hex + "/#" + keydata.k;
+                link.setAttribute("href", "http://localhost:3000/download/" + hex + "/#" + keydata.k);
+
+                console.log("Share this link with a friend: http://localhost:3000/download/" + hex + "/#" + keydata.k);
+              })
+            }
+          };
+
+          xhr.send(fd);
+        })
+        .catch(function(err){
+          console.error(err);
+        });
+
+      })
+      .catch(function(err){
+        console.error(err);
+      });
+
+    };
+    reader.readAsArrayBuffer(file);
+  }
+
+  function ivToStr(iv) {
+    let hexStr = "";
+    for (var i in iv) {
+      if (iv[i] < 16) {
+        hexStr += "0" + iv[i].toString(16);
+      } else {
+        hexStr += iv[i].toString(16);
+      }
+    }
+    window.hexStr = hexStr;
+    return hexStr;
+  }
+
+  function strToIv(str) {
+    var iv = new Uint8Array(16);
+    for (var i = 0; i < str.length; i += 2) {
+      iv[i/2] = parseInt((str.charAt(i) + str.charAt(i + 1)), 16);
+    }
+
+    return iv;
+  }
+
+  function returnBindedLI(a_element, name, link, li) {
+    return function updateProgress(e) {
+      if (e.lengthComputable) {
+        var percentComplete = Math.floor((e.loaded / e.total) * 100);
+        a_element.innerHTML = "Progress: " + percentComplete + "%";
+
+        if (percentComplete === 100) {
+          var del = document.createElement("td");
+          var btn = document.createElement("button");
+          btn.innerHTML = "x";
+          btn.style = "padding: 0; border: none; background: none; cursor: pointer"
+          btn.addEventListener("click", function() {
+            var segments = link.innerHTML.split("/");
+            var key = segments[segments.length - 2];
+
+            var xhr = new XMLHttpRequest();
+            xhr.open("post", "/delete/" + key, true);
+            xhr.setRequestHeader("Content-Type", "application/json");
+            if (!localStorage.getItem(key)) return;
+
+            xhr.send(JSON.stringify({delete_token: localStorage.getItem(key)}));
+
+            xhr.onreadystatechange = function() {
+              if (xhr.readyState === XMLHttpRequest.DONE) {
+                document.getElementById("uploaded-files").removeChild(li);
+                localStorage.removeItem(key);
+              }
+
+              if (xhr.status === 200) {
+                console.log("The file was successfully deleted.");
+              } else {
+                console.log("The file has expired, or has already been deleted.");
+              }
+            }
+
+          });
+          del.appendChild(btn);
+          li.appendChild(del);
+        }
+      }
+    }
+  }