Handle modification of external tasks

app/Controller/ExternalTaskCreationController.php

@@ -44,7 +44,7 @@ class ExternalTaskCreationController extends BaseController
 
             if (empty($values)) {
                 $values = $this->request->getValues();
-                $externalTask = $taskProvider->retrieve($taskProvider->buildTaskUri($values));
+                $externalTask = $taskProvider->fetch($taskProvider->buildTaskUri($values));
 
                 $values = $externalTask->getFormValues() + array(
                     'external_uri' => $externalTask->getUri(),
@@ -56,7 +56,7 @@ class ExternalTaskCreationController extends BaseController
                     'owner_id' => $this->userSession->getId(),
                 );
             } else {
-                $externalTask = $taskProvider->retrieve($values['external_uri']);
+                $externalTask = $taskProvider->fetch($values['external_uri']);
             }
 
             $this->response->html($this->template->render('external_task_creation/step2', array(

app/Controller/ExternalTaskViewController.php

@@ -17,7 +17,7 @@ class ExternalTaskViewController extends BaseController
         try {
             $task = $this->getTask();
             $taskProvider = $this->externalTaskManager->getProvider($task['external_provider']);
-            $externalTask = $taskProvider->retrieve($task['external_uri']);
+            $externalTask = $taskProvider->fetch($task['external_uri']);
 
             $this->response->html($this->template->render($taskProvider->getViewTemplate(), array(
                 'task' => $task,

app/Controller/TaskModificationController.php

@@ -2,6 +2,10 @@
 
 namespace Kanboard\Controller;
 
+use Kanboard\Core\Controller\AccessForbiddenException;
+use Kanboard\Core\ExternalTask\AccessForbiddenException as ExternalTaskAccessForbiddenException;
+use Kanboard\Core\ExternalTask\ExternalTaskException;
+
 /**
  * Task Modification controller
  *
@@ -43,7 +47,7 @@ class TaskModificationController extends BaseController
         $values = $this->hook->merge('controller:task:form:default', $values, array('default_values' => $values));
         $values = $this->hook->merge('controller:task-modification:form:default', $values, array('default_values' => $values));
 
-        $this->response->html($this->template->render('task_modification/show', array(
+        $params = array(
             'project' => $project,
             'values' => $values,
             'errors' => $errors,
@@ -51,7 +55,29 @@ class TaskModificationController extends BaseController
             'tags' => $this->taskTagModel->getList($task['id']),
             'users_list' => $this->projectUserRoleModel->getAssignableUsersList($task['project_id']),
             'categories_list' => $this->categoryModel->getList($task['project_id']),
-        )));
+        );
+
+        $this->renderTemplate($task, $params);
+    }
+
+    protected function renderTemplate(array &$task, array &$params)
+    {
+        if (empty($task['external_uri'])) {
+            $this->response->html($this->template->render('task_modification/show', $params));
+        } else {
+
+            try {
+                $taskProvider = $this->externalTaskManager->getProvider($task['external_provider']);
+                $params['template'] = $taskProvider->getModificationFormTemplate();
+                $params['external_task'] = $taskProvider->fetch($task['external_uri']);
+            } catch (ExternalTaskAccessForbiddenException $e) {
+                throw new AccessForbiddenException($e->getMessage());
+            } catch (ExternalTaskException $e) {
+                $params['error_message'] = $e->getMessage();
+            }
+
+            $this->response->html($this->template->render('external_task_modification/show', $params));
+        }
     }
 
     /**
@@ -66,7 +92,7 @@ class TaskModificationController extends BaseController
 
         list($valid, $errors) = $this->taskValidator->validateModification($values);
 
-        if ($valid && $this->taskModificationModel->update($values)) {
+        if ($valid && $this->updateTask($task, $values, $errors)) {
             $this->flash->success(t('Task updated successfully.'));
             $this->response->redirect($this->helper->url->to('TaskViewController', 'show', array('project_id' => $task['project_id'], 'task_id' => $task['id'])), true);
         } else {
@@ -74,4 +100,23 @@ class TaskModificationController extends BaseController
             $this->edit($values, $errors);
         }
     }
+
+    protected function updateTask(array &$task, array &$values, array &$errors)
+    {
+        $result = $this->taskModificationModel->update($values);
+
+        if ($result && ! empty($task['external_uri'])) {
+            try {
+                $taskProvider = $this->externalTaskManager->getProvider($task['external_provider']);
+                $result = $taskProvider->save($task['external_uri'], $values, $errors);
+            } catch (ExternalTaskAccessForbiddenException $e) {
+                throw new AccessForbiddenException($e->getMessage());
+            } catch (ExternalTaskException $e) {
+                $this->logger->error($e->getMessage());
+                $result = false;
+            }
+        }
+
+        return $result;
+    }
 }

app/Core/ExternalTask/ExternalTaskProviderInterface.php

@@ -22,12 +22,22 @@ interface ExternalTaskProviderInterface
      * Retrieve task from external system or cache
      *
      * @access public
-     * @throws \Kanboard\Core\ExternalTask\AccessForbiddenException
-     * @throws \Kanboard\Core\ExternalTask\NotFoundException
+     * @throws \Kanboard\Core\ExternalTask\ExternalTaskException
      * @param  string $uri
      * @return ExternalTaskInterface
      */
-    public function retrieve($uri);
+    public function fetch($uri);
+
+    /**
+     * Save external task to another system
+     *
+     * @throws \Kanboard\Core\ExternalTask\ExternalTaskException
+     * @param  string $uri
+     * @param  array  $formValues
+     * @param  array  $formErrors
+     * @return bool
+     */
+    public function save($uri, array $formValues, array &$formErrors);
 
     /**
      * Get task import template name
@@ -43,6 +53,13 @@ interface ExternalTaskProviderInterface
      */
     public function getCreationFormTemplate();
 
+    /**
+     * Get modification form template
+     *
+     * @return string
+     */
+    public function getModificationFormTemplate();
+
     /**
      * Get task view template name
      *

app/Template/external_task_modification/show.php

@@ -0,0 +1,26 @@
+<form class="popover-form" method="post" action="<?= $this->url->href('TaskModificationController', 'update', array('task_id' => $task['id'], 'project_id' => $project['id'])) ?>">
+    <?= $this->form->csrf() ?>
+    <?= $this->form->hidden('id', $values) ?>
+    <?= $this->form->hidden('project_id', $values) ?>
+
+    <?php if (! empty($error_message)): ?>
+        <p class="alert alert-error"><?= $this->text->e($error_message) ?></p>
+    <?php else: ?>
+        <?= $this->render($template, array(
+            'project' => $project,
+            'task' => $task,
+            'external_task' => $external_task,
+            'tags' => $tags,
+            'users_list' => $users_list,
+            'categories_list' => $categories_list,
+            'values' => $values,
+            'errors' => $errors,
+        )) ?>
+    <?php endif ?>
+
+    <div class="form-actions">
+        <button type="submit" class="btn btn-blue"><?= t('Save') ?></button>
+        <?= t('or') ?>
+        <?= $this->url->link(t('cancel'), 'TaskViewController', 'show', array('task_id' => $task['id'], 'project_id' => $task['project_id']), false, 'close-popover') ?>
+    </div>
+</form>