Add manual backup option

management/templates/system-backup.html

@@ -140,6 +140,10 @@
   <tbody>
   </tbody>
 </table>
+
+<button id="create-full-backup-button" class="btn btn-primary" onclick="do_backup(true)">Create Full Backup Now</button>
+<button id="create-incremental-backup-button" class="btn btn-primary" onclick="do_backup(false)">Create Incremental Backup Now</button>
+
 <script>
 
 function toggle_form() {
@@ -303,4 +307,29 @@ function init_inputs(target_type) {
     set_host($('#backup-target-s3-host-select').val());
   }
 }
+
+function do_backup(is_full) {
+  let disclaimer = "The backup process will pause some services (such as PHP, Postfix and Dovecot). Depending on the size of the data this can take a while."
+  if (!is_full) {
+    disclaimer += "\nDepending on the amount of incremental backups done after the last full backup, the box may decide to do a full backup instead."
+  }
+  show_modal_confirm("Warning!", disclaimer, "Start Backup", () => {
+    api(
+    "/system/backup/new",
+    "POST",
+    {
+      full: is_full
+    },
+    function(r) {
+      // use .text() --- it's a text response, not html
+      show_modal_error("Backup configuration", $("<p/>").text(r), function() { if (r == "OK") show_system_backup(); }); // refresh after modal on success
+    },
+    function(r) {
+      // use .text() --- it's a text response, not html
+      show_modal_error("Backup configuration", $("<p/>").text(r));
+    });
+  return false;
+  })
+}
+
 </script>