Add select/deselect all buttons to multiselect custom fields

admin/edit_post.php

@@ -399,7 +399,11 @@ require_once(HESK_PATH . 'inc/show_admin_nav.inc.php');
                                     }
                                     echo '<option '.$selected.'>'.$option.'</option>';
                                 }
-                                echo '</select></div></div>';
+                                echo '</select>
+                                <div class="btn-group" role="group">
+                                    <button type="button" class="btn btn-default" onclick="selectAll(\''.$v['name'].'\')">Select All</button>
+                                    <button type="button" class="btn btn-default" onclick="deselectAll(\''.$v['name'].'\')">Deselect All</button>
+                                </div></div></div>';
                                 break;
 
 		                    /* Default text input */

admin/new_ticket.php

@@ -304,7 +304,11 @@ require_once(HESK_PATH . 'inc/show_admin_nav.inc.php');
                                     echo '<option '.$selected.'>'.$option.'</option>';
                                 }
 
-                                echo '</select></div></div>';
+                                echo '</select>
+                                <div class="btn-group" role="group">
+                                    <button type="button" class="btn btn-default" onclick="selectAll(\''.$v['name'].'\')">Select All</button>
+                                    <button type="button" class="btn btn-default" onclick="deselectAll(\''.$v['name'].'\')">Deselect All</button>
+                                </div></div></div>';
                             break;
 
 	                        /* Checkbox */
@@ -570,7 +574,11 @@ require_once(HESK_PATH . 'inc/show_admin_nav.inc.php');
                                     echo '<option '.$selected.'>'.$option.'</option>';
                                 }
 
-                                echo '</select></div></div>';
+                                echo '</select>
+                                <div class="btn-group" role="group">
+                                    <button type="button" class="btn btn-default" onclick="selectAll(\''.$v['name'].'\')">Select All</button>
+                                    <button type="button" class="btn btn-default" onclick="deselectAll(\''.$v['name'].'\')">Deselect All</button>
+                                </div></div></div>';
                                 break;
 
 	                        /* Default text input */

index.php

@@ -371,7 +371,12 @@ function print_add_ticket()
                                     echo '<option '.$selected.'>'.$option.'</option>';
                                 }
 
-                                echo '</select></div></div>';
+                                echo '</select>
+                                <div class="btn-group" role="group">
+                                    <button type="button" class="btn btn-default" onclick="selectAll(\''.$v['name'].'\')">Select All</button>
+                                    <button type="button" class="btn btn-default" onclick="deselectAll(\''.$v['name'].'\')">Deselect All</button>
+                                </div>
+                                </div></div>';
                                 break;
 
                             case 'date':
@@ -606,7 +611,11 @@ function print_add_ticket()
                                     echo '<option '.$selected.'>'.$option.'</option>';
                                 }
 
-                                echo '</select></div></div>';
+                                echo '</select>
+                                <div class="btn-group" role="group">
+                                    <button type="button" class="btn btn-default" onclick="selectAll(\''.$v['name'].'\')">Select All</button>
+                                    <button type="button" class="btn btn-default" onclick="deselectAll(\''.$v['name'].'\')">Deselect All</button>
+                                </div></div></div>';
                                 break;
 
                             case 'date':

js/modsForHesk-javascript.js

@@ -29,6 +29,14 @@ var loadJquery = function()
     });
 };
 
+function selectAll(id) {
+    $('#' + id + ' option').prop('selected', true);
+}
+
+function deselectAll(id) {
+    $('#' + id + ' option').prop('selected', false);
+}
+
 function toggleRow(id) {
     if ($('#' + id).hasClass('danger'))
     {