Added option to duplicate multiple threads at once
diff --git a/console_inject.js b/console_inject.js
index 7c0d339..3e74266 100644
--- a/console_inject.js
+++ b/console_inject.js
@@ -1,5 +1,19 @@
 var mutationObserver, intersectionObserver, options;
 
+function parseUrl(url) {
+  var forum_a = url.match(/forum\/([0-9]+)/i);
+  var thread_a = url.match(/thread\/([0-9]+)/i);
+
+  if (forum_a === null || thread_a === null) {
+    return false;
+  }
+
+  return {
+    "forum": forum_a[1],
+    "thread": thread_a[1]
+  };
+}
+
 function mutationCallback(mutationList, observer) {
   mutationList.forEach((mutation) => {
     if (mutation.type == "childList") {
@@ -28,6 +42,46 @@
               node.querySelector(".main-card").appendChild(link);
             }
           }
+
+          if (options.batchduplicate && ("tagName" in node) && node.tagName == "MATERIAL-BUTTON" && node.getAttribute("debugid") !== null && (node.getAttribute("debugid") == "mark-read-button" || node.getAttribute("debugid") == "mark-unread-button") && ("parentNode" in node) && document.querySelector("[debugid=\"batchduplicate\"]") === null && node.parentNode !== null && ("parentNode" in node.parentNode) && node.parentNode.parentNode !== null && ("tagName" in node.parentNode.parentNode) && node.parentNode.parentNode.tagName == "EC-BULK-ACTIONS") {
+            var clone = node.cloneNode(true);
+            clone.setAttribute("debugid", "batchduplicate");
+            clone.setAttribute("title", chrome.i18n.getMessage("inject_duplicatebtn"));
+            clone.querySelector("material-icon").setAttribute("icon", "control_point_duplicate");
+            clone.querySelector("i.material-icon-i").innerText = "control_point_duplicate";
+            node.parentNode.prepend(clone);
+            clone.addEventListener("click", function() {
+              var modal = document.querySelector(".pane[pane-id=\"default-1\"]");
+              modal.classList.add("visible");
+              modal.style.display = "block";
+              modal.innerHTML = '<material-dialog role="dialog" aria-modal="true" style="display: block!important; width: 600px; max-width: 100%; margin: 8px auto; padding: 16px 0; background: white; box-shadow: 0 24px 38px 3px rgba(0,0,0,.14), 0 9px 46px 8px rgba(0,0,0,.12), 0 11px 15px -7px rgba(0,0,0,.2);"><header role="presentation" style="padding: 24px 24px 0; width: 100%; box-sizing: border-box;"><div style="color: #202124; font-family: \'Google Sans\',sans-serif; font-size: 18px; font-weight: 400; line-height: 24px; margin-bottom: 4px; text-align: center;">'+chrome.i18n.getMessage("inject_duplicatebtn")+'</div></header><main role="presentation" style="font-size: 13px; font-weight: 400; color: rgba(0,0,0,.87); overflow: auto; padding: 0 24px;"><p><label for="duplicate_thread">'+chrome.i18n.getMessage("inject_duplicateinto")+' </label><input type="url" id="infinitegforums_duplicateinto" placeholder="'+chrome.i18n.getMessage("inject_duplicateinto_placeholder")+'" style="width: 400px;"></p></main><footer role="presentation" style="padding: 0 24px;"><material-button role="button" style="display: inline-block; float: right; color: #1a73e8; height: 36px; min-width: 64px; margin: 0 4px; cursor: pointer;" id="infinitegforums_duplicate"><div class="content" style="line-height: 36px; text-align: center;">'+chrome.i18n.getMessage("inject_duplicate_confirm")+'</div></material-button><material-button role="button" style="display: inline-block; float: right; color: #1a73e8; height: 36px; min-width: 64px; margin: 0 4px; cursor: pointer;" id="infinitegforums_cancel"><div class="content" style="line-height: 36px; text-align: center;">'+chrome.i18n.getMessage("inject_duplicate_cancel")+'</div></material-button><div style="clear: both;"></div></footer></material-dialog>';
+              modal.querySelector("#infinitegforums_cancel").addEventListener("click", function() {
+                var modal = document.querySelector(".pane[pane-id=\"default-1\"]");
+                modal.classList.remove("visible");
+                modal.style.display = "none";
+                modal.innerHTML = "";
+              });
+              modal.querySelector("#infinitegforums_duplicate").addEventListener("click", function() {
+                var modal = document.querySelector(".pane[pane-id=\"default-1\"]");
+                var duplicateinto = parseUrl(modal.querySelector("#infinitegforums_duplicateinto").value);
+                if (duplicateinto === false) {
+                  return;
+                }
+                console.log(duplicateinto);
+                modal.querySelector("footer").style.display = "none";
+                var checkboxes = document.querySelectorAll(".thread-group material-checkbox[aria-checked=\"true\"]");
+                modal.querySelector("main").innerHTML = '<p style="text-align: center;">'+chrome.i18n.getMessage("inject_duplicate_progress")+':<br><progress id="infinitegforums_progress" max="'+checkboxes.length+'" value="0"></progress></p>';
+                checkboxes.forEach(checkbox => {
+                  var thread = parseUrl(checkbox.parentNode.parentNode.querySelector("a.header-content").href);
+                  console.log(thread);
+                  var script = document.createElement('script');
+                  script.textContent = 'fetch("https://support.google.com/s/community/api/MarkDuplicateThread", {"credentials":"include","headers":{"content-type":"text/plain; charset=utf-8"},"body":\'{\"1\":\"'+thread.forum+'\",\"2\":\"'+thread.thread+'\",\"3\":{\"2\":{\"1\":\"'+duplicateinto.forum+'\",\"2\":\"'+duplicateinto.thread+'\"}}}\',"method":"POST","mode":"cors"}).then(_ => { var progress = document.querySelector("#infinitegforums_progress"); progress.value = parseInt(progress.value) + 1; if (progress.value == progress.getAttribute("max")) { location.reload(); } });';
+                  document.head.appendChild(script);
+                  script.remove();
+                });
+              });
+            });
+          }
         }
       });
     }