extension.driver.php

<?php

class extension_rest_api extends Extension{
    
    public function getSubscribedDelegates() {
        return array(
            array(
                'page'      => '/frontend/',
                'delegate'  => 'FrontendPageResolved',
                'callback'  => 'manipulateResolvedPage'
            ),
            array(
                'page'      => '/frontend/',
                'delegate'  => 'FrontendOutputPreGenerate',
                'callback'  => 'frontendOutputPreGenerate'
            )
        );
    }
    
    public function manipulateResolvedPage($context) {
        if(!class_exists('REST_API') || (class_exists('REST_API') && !REST_API::isFrontendPageRequest())) return;
        // get the page data from context
        $page = $context['page_data'];

        if (REST_API::getHTTPMethod() == 'get') {
            $page['data_sources'] = 'rest_api_entries';
            $page['events'] = null;
        }
        if(REST_API::getHTTPMethod() == 'post'){
            $page['events'] = 'rest_api_entries';
        }
        
        $context['page_data'] = $page;
    }
    
    public function frontendOutputPreGenerate($context) {
        if(class_exists('REST_API') && class_exists('REST_Entries') && REST_API::isFrontendPageRequest()) {
            REST_Entries::sendOutput($context['xml']);
            exit;
        }
        
    }
    
    public function uninstall(){
        $htaccess = @file_get_contents(DOCROOT . '/.htaccess');
        if($htaccess === FALSE) return FALSE;
        
        $htaccess = self::__removeAPIRules($htaccess);
        return @file_put_contents(DOCROOT . '/.htaccess', $htaccess);
    }

    public function install(){
        
        $htaccess = @file_get_contents(DOCROOT . '/.htaccess');
        if($htaccess === FALSE) return FALSE;
        $token = md5(time());
        
        $rule = "
    ### START API RULES
    RewriteRule ^symphony\/api(\/(.*\/?))?$ extensions/rest_api/handler.php?url={$token}&%{QUERY_STRING}    [NC,L]
    ### END API RULES\n\n";
        
        $htaccess = self::__removeAPIRules($htaccess);
        $htaccess = preg_replace('/RewriteRule .\* - \[S=14\]\s*/i', "RewriteRule .* - [S=14]\n{$rule}\t", $htaccess);
        $htaccess = str_replace($token, '$1', $htaccess);
        
        return file_put_contents(DOCROOT . '/.htaccess', $htaccess);
        
    }
    
    private static function __removeAPIRules($htaccess){
        return preg_replace('/### START API RULES(.)+### END API RULES[\n]/is', NULL, $htaccess);
    }
}