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<?php
/**
* Plugin default_colors.
*
* Allow users to easily overrides colors of the default theme.
*/
use Shaarli\Config\ConfigManager;
use Shaarli\Plugin\PluginManager;
const DEFAULT_COLORS_PLACEHOLDERS = [
'DEFAULT_COLORS_MAIN',
'DEFAULT_COLORS_BACKGROUND',
'DEFAULT_COLORS_DARK_MAIN',
];
/**
* Display an error if the plugin is active a no color is configured.
*
* @param $conf ConfigManager instance
*
* @return array|null The errors array or null of there is none.
*/
function default_colors_init($conf)
{
$params = '';
foreach (DEFAULT_COLORS_PLACEHOLDERS as $placeholder) {
$params .= trim($conf->get('plugins.'. $placeholder, ''));
}
if (empty($params)) {
$error = t('Default colors plugin error: '.
'This plugin is active and no custom color is configured.');
return array($error);
}
}
/**
* When plugin parameters are saved, we regenerate the custom CSS file with provided settings.
*
* @param array $data $_POST array
*
* @return array Updated $_POST array
*/
function hook_default_colors_save_plugin_parameters($data)
{
$file = PluginManager::$PLUGINS_PATH . '/default_colors/default_colors.css';
$template = file_get_contents(PluginManager::$PLUGINS_PATH . '/default_colors/default_colors.css.template');
$content = '';
foreach (DEFAULT_COLORS_PLACEHOLDERS as $rule) {
$content .= ! empty($data[$rule])
? default_colors_format_css_rule($data, $rule) .';'. PHP_EOL
: '';
}
if (! empty($content)) {
file_put_contents($file, sprintf($template, $content));
}
return $data;
}
/**
* When linklist is displayed, include default_colors CSS file.
*
* @param array $data - header data.
*
* @return mixed - header data with default_colors CSS file added.
*/
function hook_default_colors_render_includes($data)
{
$file = PluginManager::$PLUGINS_PATH . '/default_colors/default_colors.css';
if (file_exists($file )) {
$data['css_files'][] = $file ;
}
return $data;
}
/**
* Create a valid CSS rule from parameters settings and plugin parameter.
*
* @param array $data $_POST array
* @param string $parameter Plugin parameter name
*
* @return string CSS rules for the provided parameter and its matching value.
*/
function default_colors_format_css_rule($data, $parameter)
{
if (empty($data[$parameter])) {
return '';
}
$key = str_replace('DEFAULT_COLORS_', '', $parameter);
$key = str_replace('_', '-', strtolower($key)) .'-color';
return ' --'. $key .': '. $data[$parameter];
}
/**
* This function is never called, but contains translation calls for GNU gettext extraction.
*/
function default_colors_translation()
{
// meta
t('Override default theme colors. Use any CSS valid color.');
t('Main color (navbar green)');
t('Background color (light grey)');
t('Dark main color (e.g. visited links)');
}
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