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<?php namespace HashOver;
// Copyright (C) 2015-2018 Jacob Barkdull
// This file is part of HashOver.
//
// HashOver is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// HashOver is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with HashOver. If not, see <http://www.gnu.org/licenses/>.
class Templater
{
public $mode;
public $setup;
public $template;
protected $curlyRegex = '/\{([a-z]+):([a-z_-]+)\}/i';
protected $newlineSearch = array ("\r\n", "\r", "\n");
protected $newlineReplace = array ("\n", "\n", PHP_EOL);
public function __construct ($mode = 'php', Setup $setup)
{
$this->mode = $mode;
$this->setup = $setup;
}
public function loadFile ($file)
{
// Attempt to read template HTML file
$theme_html = @file_get_contents ($file);
// Check if template file read successfully
if ($theme_html !== false) {
// If so, return trimmed HTML template
return trim ($theme_html);
} else {
// If not, throw exception
throw new \Exception ('Failed to load template file.');
}
}
protected function curlyVariable ($key)
{
return '{{' . $key . '}}';
}
protected function fromTemplate ($key)
{
if ($this->mode !== 'php') {
return $this->curlyVariable ($key);
}
if (!empty ($this->template[$key])) {
return $this->template[$key];
}
return '';
}
protected function placeholder ($id)
{
$span_id = 'hashover-placeholder-' . $id;
$span_id .= '-' . $this->fromTemplate ('permalink');
$placeholder = new HTMLTag ('span', array (
'id' => $span_id
), false);
if (!empty ($this->template[$id])) {
$placeholder->innerHTML ($this->template[$id]);
}
return $placeholder->asHTML ();
}
protected function parser ($var)
{
if (empty ($var[1]) or empty ($var[2])) {
return '';
}
switch ($var[1]) {
case 'hashover': {
return $this->fromTemplate ($var[2]);
}
case 'placeholder': {
return $this->placeholder ($var[2]);
}
}
}
public function parseTemplate ($file, array $template = array ())
{
$this->template = $template;
$data = $this->loadFile ($file);
$template = preg_replace_callback ($this->curlyRegex, 'self::parser', $data);
$template = str_replace ($this->newlineSearch, $this->newlineReplace, $template);
$template = preg_replace ('/^[\s\n]+$/m', '', $template);
return $template;
}
public function parseTheme ($file, array $template = array ())
{
// Get the file path for the configured theme
$path = $this->setup->getThemePath ($file, false);
$path = $this->setup->getAbsolutePath ($path);
// Parse the theme HTML as template
$theme = $this->parseTemplate ($path, $template);
return $theme;
}
}
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