Model/Config.php
public function validateCustomSnippet($name, $type, $priority)
    {
        $snippetName = str_replace(' ', '', $name);
        $types = ['init', 'recv', 'hit', 'miss', 'pass', 'fetch', 'error', 'deliver', 'log', 'hash', 'none'];

        $inArray = in_array($type, $types);
        $isNumeric = is_numeric($priority);
        $isAlphanumeric = preg_match('/^[\w]+$/', $snippetName);
        $error = null;

        if (!$inArray) {
            $error = 'Type value is not recognised.';
            return [
                'snippet_name' => null,
                'error' => $error
            ];
        }
        if (!$isNumeric) {
            $error = 'Please make sure that the priority value is a number.';
            return [
                'snippet_name' => null,
                'error' => $error
            ];
        }
        if (!$isAlphanumeric) {
            $error = 'Please make sure that the name value contains only alphanumeric characters.';
            return [
                'snippet_name' => null,
                'error' => $error
            ];
        }
        return [
            'snippet_name' => $snippetName,
            'error' => $error
        ];
    }
public function validateCustomSnippet($name, $type, $priority)
    {
        $snippetName = str_replace(' ', '', $name);
        $types = ['init', 'recv', 'hit', 'miss', 'pass', 'fetch', 'error', 'deliver', 'log', 'hash', 'none'];

        $inArray = in_array($type, $types);
        $isNumeric = is_numeric($priority);
        $isAlphanumeric = preg_match('/^[\w]+$/', $snippetName);
        $error = null;

        if (!$inArray) {
            $error = 'Type value is not recognised.';
            return [
                'snippet_name' => null,
                'error' => $error
            ];
        }
        if (!$isNumeric) {
            $error = 'Please make sure that the priority value is a number.';
            return [
                'snippet_name' => null,
                'error' => $error
            ];
        }
        if (!$isAlphanumeric) {
            $error = 'Please make sure that the name value contains only alphanumeric characters.';
            return [
                'snippet_name' => null,
                'error' => $error
            ];
        }
        return [
            'snippet_name' => $snippetName,
            'error' => $error
        ];
    }
Validate custom snippet data

@param $name
@param $type
@param $priority
@return array