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#include <iostream>
#include <typeinfo>
#include "ImageRequest.h"
#include "graphics/Graphics.h"
#include "client/HTTP.h"
ImageRequest::ImageRequest(std::string url, int width, int height, ListenerHandle listener):
Request(Image, listener)
{
URL = url;
HTTPContext = NULL;
Width = width;
Height = height;
}
ImageRequest::~ImageRequest()
{
}
RequestBroker::ProcessResponse ImageRequest::Process(RequestBroker & rb)
{
VideoBuffer * image = NULL;
//Have a look at the thumbnail cache
for(std::deque<std::pair<std::string, VideoBuffer*> >::iterator iter = rb.imageCache.begin(), end = rb.imageCache.end(); iter != end; ++iter)
{
if((*iter).first == URL)
{
image = (*iter).second;
#ifdef DEBUG
std::cout << typeid(*this).name() << " " << URL << " found in cache" << std::endl;
#endif
}
}
if(!image)
{
if(HTTPContext)
{
if(http_async_req_status(HTTPContext))
{
pixel * imageData;
char * data;
int status, data_size, imgw, imgh;
data = http_async_req_stop(HTTPContext, &status, &data_size);
if (status == 200 && data)
{
imageData = Graphics::ptif_unpack(data, data_size, &imgw, &imgh);
free(data);
if(imageData)
{
//Success!
image = new VideoBuffer(imageData, imgw, imgh);
free(imageData);
}
else
{
//Error thumbnail
image = new VideoBuffer(32, 32);
image->SetCharacter(14, 14, 'x', 255, 255, 255, 255);
}
if(rb.imageCache.size() >= THUMB_CACHE_SIZE)
{
//Remove unnecessary from thumbnail cache
delete rb.imageCache.front().second;
rb.imageCache.pop_front();
}
rb.imageCache.push_back(std::pair<std::string, VideoBuffer*>(URL, image));
}
else
{
#ifdef DEBUG
std::cout << typeid(*this).name() << " Request for " << URL << " failed with status " << status << std::endl;
#endif
if(data)
free(data);
return RequestBroker::Failed;
}
}
}
else
{
//Check for ongoing requests
for(std::vector<Request*>::iterator iter = rb.activeRequests.begin(), end = rb.activeRequests.end(); iter != end; ++iter)
{
if((*iter)->Type != Request::Image)
continue;
ImageRequest * otherReq = (ImageRequest*)(*iter);
if(otherReq->URL == URL && otherReq != this)
{
#ifdef DEBUG
std::cout << typeid(*this).name() << " Request for " << URL << " found, appending." << std::endl;
#endif
//Add the current listener to the item already being requested
(*iter)->Children.push_back(this);
return RequestBroker::Duplicate;
}
}
//If it's not already being requested, request it
#ifdef DEBUG
std::cout << typeid(*this).name() << " Creating new request for " << URL << std::endl;
#endif
HTTPContext = http_async_req_start(NULL, (char *)URL.c_str(), NULL, 0, 0);
RequestTime = time(NULL);
}
}
if(image)
{
//Create a copy, to seperate from the cache
std::vector<Request *> children(Children.begin(), Children.end());
Children.clear();
VideoBuffer * myVB = new VideoBuffer(*image);
myVB->Resize(Width, Height, true);
ResultObject = (void*)myVB;
rb.requestComplete(this);
for(std::vector<Request*>::iterator childIter = children.begin(), childEnd = children.end(); childIter != childEnd; ++childIter)
{
if((*childIter)->Type == Request::Image)
{
ImageRequest * childReq = (ImageRequest*)*childIter;
VideoBuffer * tempImage = new VideoBuffer(*image);
tempImage->Resize(childReq->Width, childReq->Height, true);
childReq->ResultObject = (void*)tempImage;
rb.requestComplete(*childIter);
}
}
return RequestBroker::Finished;
}
return RequestBroker::OK;
}
void ImageRequest::Cleanup()
{
Request::Cleanup();
if(ResultObject)
{
delete ((VideoBuffer*)ResultObject);
ResultObject = NULL;
}
}
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