Handle error when trying to remove a package that other packages depend on.

classes/admin.php

@@ -522,6 +522,23 @@ class Admin
         return $dependencies;
     }
 
+    /**
+     * Get list of packages that depend on the passed package slug
+     *
+     * @param string $slug          The package slug
+     *
+     * @return array|bool
+     */
+    public function getPackagesThatDependOnPackage($slug)
+    {
+        $gpm = $this->gpm();
+        if (!$gpm) {
+            return false;
+        }
+
+        return $gpm->getPackagesThatDependOnPackage($slug);
+    }
+
     /**
      * Check the passed packages list can be updated
      *

classes/controller.php

@@ -367,6 +367,22 @@ class AdminController
 
         require_once __DIR__ . '/gpm.php';
 
+        //check if there are packages that have this as a dependency. Abort and show which ones
+        $dependent_packages = $this->admin->getPackagesThatDependOnPackage($package);
+        if (count($dependent_packages) > 0) {
+            if (count($dependent_packages) > 1) {
+                $message = "The installed packages <cyan>" . implode('</cyan>, <cyan>', $dependent_packages) . "</cyan> depends on this package. Please remove those first.";
+            } else {
+                $message = "The installed package <cyan>" . implode('</cyan>, <cyan>', $dependent_packages) . "</cyan> depends on this package. Please remove it first.";
+            }
+
+            $this->admin->json_response = ['status' => 'error', 'message' => $message];
+            return;
+        }
+
+        $this->admin->json_response = ['status' => 'success', 'message' => 'xxx'];
+        return true;
+
         try {
             $dependencies = $this->admin->dependenciesThatCanBeRemovedWhenRemoving($package);
             $result = \Grav\Plugin\Admin\Gpm::uninstall($package, []);

themes/grav/app/utils/packages.js

@@ -71,6 +71,9 @@ class Packages {
                 $(document).on('closing', '[data-remodal-id="remove-package"]', () => {
                     Packages.getBackToList(type);
                 });
+            } else {
+                $('.remove-package-confirm').addClass('hidden');
+                $('.remove-package-error').removeClass('hidden');
             }
         });
     }

themes/grav/templates/partials/modal-remove-package.html.twig

@@ -31,5 +31,11 @@
             </div>
         </div>
 
+        <div class="remove-package-error hidden">
+            <h1>Error removing the {{ type }}</h1>
+            <div class="button-bar">
+                <button data-remodal-action="cancel" class="button secondary remodal-cancel"><i class="fa fa-fw fa-close"></i> {{ "PLUGIN_ADMIN.CANCEL"|tu }}</button>
+            </div>
+        </div>
     </form>
 </div>