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-8n-Y)x]{u?|o,'KzH+4 = $key;
        }
        // add unique id to group ends
        if ($value == ':group:end') {
            $value .= ':' . $group_counter++;
        }
        $this->fields[] = $prefix . $value;
    }

    /**
     * Reads form paths to {@link $fields}
     *
     * @param array $form Form
     *
     * @return void
     */
    protected function readFormPaths($form)
    {
        // flatten form fields' paths and save them to $fields
        $this->fields = array();
        array_walk($form, array($this, '_readFormPathsCallback'), '');

        // $this->fields is an array of the form: [0..n] => 'field path'
        // change numeric indexes to contain field names (last part of the path)
        $paths = $this->fields;
        $this->fields = array();
        foreach ($paths as $path) {
            $key = ltrim(
                mb_substr($path, mb_strrpos($path, '/')),
                '/'
            );
            $this->fields[$key] = $path;
        }
        // now $this->fields is an array of the form: 'field name' => 'field path'
    }

    /**
     * Reads fields' types to $this->_fieldsTypes
     *
     * @return void
     */
    protected function readTypes()
    {
        $cf = $this->_configFile;
        foreach ($this->fields as $name => $path) {
            if (mb_strpos($name, ':group:') === 0) {
                $this->_fieldsTypes[$name] = 'group';
                continue;
            }
            $v = $cf->getDbEntry($path);
            if ($v !== null) {
                $type = is_array($v) ? 'select' : $v;
            } else {
                $type = gettype($cf->getDefault($path));
            }
            $this->_fieldsTypes[$name] = $type;
        }
    }

    /**
     * Reads form settings and prepares class to work with given subset of
     * config file
     *
     * @param string $form_name Form name
     * @param array  $form      Form
     *
     * @return void
     */
    public function loadForm($form_name, $form)
    {
        $this->name = $form_name;
        $this->readFormPaths($form);
        $this->readTypes();
    }
}
