mountain-cms/pb.cpp at master · bhagyapathak/mountain-cms · GitHub

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//
// Mountain CMS
// Daniel A. White
//
// pb.cpp
// Builds the pages and caches them
//

#include "pb.h"

void mtn_cms_page_builder::getpage( mtn_cms_http_response_data* response,
				    mtn_cms_http_request_data* request,
				    CppSQLite3DB* db,
				    std::string* content)
{
  _response = response;
  _request = request;
  _db = db;
  mtn_cms_cache_item cache;
  if (getcache(request->page, &cache))
    {
      time_t t = time(NULL);
      if ( t <= (cache.ttl + cache.created) )
	{
	  (*content) = cache.data;
	  response->status = MTN_CMS_HTTP_STATUS_OK;
	  response->length = cache.data.length();
	  response->content_type = MTN_CMS_MIME_TEXT_HTML;
	  return;
	}
    }

  if ( buildpage(request->page, *content))
    {
      response->status = MTN_CMS_HTTP_STATUS_OK;
      response->length = content->length();
      response->content_type = MTN_CMS_MIME_TEXT_HTML;
      return;
   }


  response->status = MTN_CMS_HTTP_STATUS_NOT_FOUND;
  return;
}

std::string mtn_cms_page_builder::datestamp(const time_t& time, int ttl)
{
  std::ostringstream ret;
  ret << "<h1>Page last built at " << mtn_cms_http_time_to_gmt_string(time);
  ret << " with a T.T.L. of " << ttl << " second(s) </h1>";
  return ret.str();
}

bool mtn_cms_page_builder::getcache(const std::string& page, mtn_cms_cache_item* cache_item)
{
  std::string _q = "SELECT * FROM `page_cache` WHERE page = \'" + page + "\';";
try
  {
  CppSQLite3Query q = _db->execQuery(_q.c_str());


  while (!q.eof())
    {
      int len;
      cache_item->data = q.getStringField("data");
      cache_item->created = q.getIntField("created");
      cache_item->ttl = q.getIntField("ttl");
      cache_item->valid = true;
      q.nextRow();
    }
  }
 catch (CppSQLite3Exception ex)
   {
     cache_item->valid = false;
   }

  return cache_item->valid;
}

void mtn_cms_page_builder::storecache(const std::string& page, mtn_cms_cache_item* cache_item)
{
  try
    {
      perror(cache_item->data.c_str());
      //Mutex here
      std::string q = "DELETE FROM `page_cache` WHERE page = \'" + page + "\';";
       _db->execScalar(q.c_str());

    }
       catch (CppSQLite3Exception ex)
	 {
	 }

  // try
       //  {
	 std::ostringstream q;


	 q << "INSERT INTO `page_cache` (`page`, `data`, `created`, `ttl`)";
	 q << " VALUES (\'" <<  page << "\', \'";
	 q << cache_item->data << "\', " << cache_item->created;
	 q << ", " << cache_item->ttl << ");";

	 _db->execScalar(q.str().c_str());
		  //Release here
	 //   }
	 // catch (CppSQLite3Exception ex)
	 // {
	 // }

}

bool mtn_cms_page_builder::buildpage(std::string page, std::string& data)
{
  try
    {

      mtn_cms_cache_item cache;
      std::ostringstream s;
      std::string head, nav, content, stamp, foot;
      time_t now = time(NULL);


      std::string _q;

      _q = "SELECT * FROM `pages` WHERE page = \'" + page + "\';";
      if ( _db->execQuery(_q.c_str()).eof() )
	return false;

      content = _db->execQuery(_q.c_str()).getStringField("data");

      _q = "SELECT * FROM `pages` WHERE page = \'Navigation\';";
      nav = _db->execQuery(_q.c_str()).getStringField("data");

      _q = "SELECT * FROM `pages` WHERE page = \'Header\';";
      head = _db->execQuery(_q.c_str()).getStringField("data");

      _q = "SELECT * FROM `pages` WHERE page = \'Footer\';";
      foot = _db->execQuery(_q.c_str()).getStringField("data");

      //  stamp = datestamp(now, 60);

      // perror(stamp);


      s << head << nav << content << datestamp(now, 60) << foot;

      cache.data = s.str();
      cache.ttl = 60;
      cache.created = now;

      data = s.str();

      storecache(page, &cache);
      return true;
    }
  catch (CppSQLite3Exception ex)
    {
    }
  return false;
}