Add API calls to manage tags

app/Api/Procedure/TagProcedure.php

@@ -0,0 +1,44 @@
+<?php
+
+namespace Kanboard\Api\Procedure;
+
+use Kanboard\Api\Authorization\ProjectAuthorization;
+use Kanboard\Api\Authorization\TagAuthorization;
+
+/**
+ * Class TagProcedure
+ *
+ * @package Kanboard\Api\Procedure
+ * @author  Frederic Guillot
+ */
+class TagProcedure extends BaseProcedure
+{
+    public function getAllTags()
+    {
+        return $this->tagModel->getAll();
+    }
+
+    public function getTagsByProject($project_id)
+    {
+        ProjectAuthorization::getInstance($this->container)->check($this->getClassName(), 'getTagsByProject', $project_id);
+        return $this->tagModel->getAllByProject($project_id);
+    }
+
+    public function createTag($project_id, $tag)
+    {
+        ProjectAuthorization::getInstance($this->container)->check($this->getClassName(), 'createTag', $project_id);
+        return $this->tagModel->findOrCreateTag($project_id, $tag);
+    }
+
+    public function updateTag($tag_id, $tag)
+    {
+        TagAuthorization::getInstance($this->container)->check($this->getClassName(), 'updateTag', $tag_id);
+        return $this->tagModel->update($tag_id, $tag);
+    }
+
+    public function removeTag($tag_id)
+    {
+        TagAuthorization::getInstance($this->container)->check($this->getClassName(), 'removeTag', $tag_id);
+        return $this->tagModel->remove($tag_id);
+    }
+}

app/Api/Procedure/TaskTagProcedure.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace Kanboard\Api\Procedure;
+
+use Kanboard\Api\Authorization\TaskAuthorization;
+
+/**
+ * Class TaskTagProcedure
+ *
+ * @package Kanboard\Api\Procedure
+ * @author  Frederic Guillot
+ */
+class TaskTagProcedure extends BaseProcedure
+{
+    public function setTaskTags($project_id, $task_id, array $tags)
+    {
+        TaskAuthorization::getInstance($this->container)->check($this->getClassName(), 'setTaskTags', $task_id);
+        return $this->taskTagModel->save($project_id, $task_id, $tags);
+    }
+
+    public function getTaskTags($task_id)
+    {
+        TaskAuthorization::getInstance($this->container)->check($this->getClassName(), 'getTaskTags', $task_id);
+        return $this->taskTagModel->getList($task_id);
+    }
+}