add new custom validations

server/libs/validations/validArticleContent.php

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+<?php
+
+namespace CustomValidations;
+
+use Respect\Validation\Rules\AbstractRule;
+
+class ValidArticleContent extends AbstractRule {
+
+    public function validate($content) {
+        $article = \Article::getDataStore($content, 'content');
+        return $article->isNull();
+   }
+}

server/libs/validations/validArticleName.php

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+<?php
+
+namespace CustomValidations;
+
+use Respect\Validation\Rules\AbstractRule;
+
+class ValidArticleName extends AbstractRule {
+
+    public function validate($name) {
+        $article = \Article::getDataStore($name, 'title');
+        return $article->isNull();
+   }
+}

server/libs/validations/validTopicName.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace CustomValidations;
+
+use Respect\Validation\Rules\AbstractRule;
+
+class ValidTopicName extends AbstractRule {
+
+    public function validate($name) {
+        $topic = \Topic::getDataStore($name, 'name');
+        return $topic->isNull();
+   }
+}