trail rendering basics

[carveJwlIkooP6JGAAIwe30JlM.git] / workshop.c

#ifndef WORKSHOP_C
#define WORKSHOP_C

#include "workshop.h"

#define VG_GAME
#include "vg/vg.h"
#include "vg/vg_tex.h"
#include "vg/vg_msg.h"
#include "vg/vg_binstr.h"
#include "ent_skateshop.h"

#include "vg/vg_steam_auth.h"
#include "vg/vg_steam_ugc.h"
#include "vg/vg_steam_friends.h"
#include "steam.h"

static struct ui_enum_opt workshop_form_visibility_opts[] = {
 { k_ERemoteStoragePublishedFileVisibilityPublic,       "Public"       },
 { k_ERemoteStoragePublishedFileVisibilityUnlisted,     "Unlisted"     },
 { k_ERemoteStoragePublishedFileVisibilityFriendsOnly,  "Friends Only" },
 { k_ERemoteStoragePublishedFileVisibilityPrivate,      "Private"      },
};

static struct ui_enum_opt workshop_form_type_opts[] = {
 { k_addon_type_none,   "None"   },
 { k_addon_type_board,  "Board"  },
 { k_addon_type_world,  "World"  },
 { k_addon_type_player, "Player" },
};

/* 
 * Close the form and discard UGC query result
 */
static void workshop_quit_form(void){
   player_board_unload( &workshop_form.board_model );
   workshop_form.file_intent = k_workshop_form_file_intent_none;

   if( workshop_form.ugc_query.result == k_EResultOK ){
      workshop_form.ugc_query.result = k_EResultNone;

      ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();
      SteamAPI_ISteamUGC_ReleaseQueryUGCRequest( 
            hSteamUGC, workshop_form.ugc_query.handle );
   }

   workshop_form.page = k_workshop_form_hidden;
   workshop_form.op = k_workshop_op_none;
}

/*
 * Delete all information about the submission
 */
static void workshop_reset_submission_data(void)
{
   workshop_form.submission.file_id = 0; /* assuming id of 0 is none/invalid */
   workshop_form.submission.description[0] = '\0';
   workshop_form.submission.title[0] = '\0';
   workshop_form.submission.author[0] = '\0';
   workshop_form.submission.submission_type_selection = 
      k_addon_type_none;
   workshop_form.submission.type = k_addon_type_none;

   workshop_form.submission.visibility =
      k_ERemoteStoragePublishedFileVisibilityPublic;

   workshop_form.addon_folder[0] = '\0';
   player_board_unload( &workshop_form.board_model );
   workshop_form.file_intent = k_workshop_form_file_intent_none;
}


/*
 * Mostly copies of what it sais on the Steam API documentation
 */
static const char *workshop_EResult_user_string( EResult result )
{
   switch( result ){
    case k_EResultInsufficientPrivilege:
     return "Your account is currently restricted from uploading content "
             "due to a hub ban, account lock, or community ban. You need to "
             "contact Steam Support to resolve the issue."; 
    case k_EResultBanned:
     return "You do not have permission to upload content to this hub "
             "because you have an active VAC or Game ban.";
    case k_EResultTimeout:
     return "The operation took longer than expected, so it was discarded. "
            "Please try again.";
    case k_EResultNotLoggedOn:
     return "You are currently not logged into Steam.";
    case k_EResultServiceUnavailable:
     return "The workshop server is having issues or is unavailable, "
            "please try again.";
    case k_EResultInvalidParam:
     return "One of the submission fields contains something not being " 
            "accepted by that field.";
    case k_EResultAccessDenied:
     return "There was a problem trying to save the title and description. "
            "Access was denied.";
    case k_EResultLimitExceeded:
     return "You have exceeded your Steam Cloud quota. If you wish to "
            "upload this file, you must remove some published items.";
    case k_EResultFileNotFound:
     return "The uploaded file could not be found.";
    case k_EResultDuplicateRequest:
     return "The file was already successfully uploaded.";
    case k_EResultDuplicateName:
     return "You already have a Steam Workshop item with that name.";
    case k_EResultServiceReadOnly:
     return "Due to a recent password or email change, you are not allowed "
             "to upload new content. Usually this restriction will expire in"
             " 5 days, but can last up to 30 days if the account has been "
             "inactive recently.";
     default: 
      return "Operation failed for an error which has not been accounted for "
             "by the programmer. Try again, sorry :)";
   }
}

/*
 * op: k_workshop_form_op_publishing_update 
 * ----------------------------------------------------------------------------
 */

/*
 * The endpoint of this operation
 */
static void on_workshop_update_result( void *data, void *user )
{
   vg_info( "Recieved workshop update result\n" );
   SubmitItemUpdateResult_t *result = data;

   /* this seems to be set here, but my account definitely has accepted it */
   if( result->m_bUserNeedsToAcceptWorkshopLegalAgreement ){
      vg_warn( "Workshop agreement currently not accepted\n" );
   }
   
   if( result->m_eResult == k_EResultOK ){
      workshop_form.page = k_workshop_form_closing_good;
      workshop_form.failure_or_success_string = "Uploaded workshop file!";
      vg_success( "file uploaded\n" );
   }
   else{
      workshop_form.page = k_workshop_form_closing_bad;
      workshop_form.failure_or_success_string = 
         workshop_EResult_user_string( result->m_eResult );

      vg_error( "Error with the submitted file (%d)\n", result->m_eResult );
   }
   workshop_form.op = k_workshop_op_none;
}

static const char *workshop_filetype_folder(void){
   enum addon_type type = workshop_form.submission.type;
   if     ( type == k_addon_type_board )  return "boards/";
   else if( type == k_addon_type_player ) return "playermodels/";
   else if( type == k_addon_type_world )  return "maps/";

   return "unknown_addon_type/";
}

/*
 * reciever on completion of packaging the files, it will then start the item
 * update with Steam API
 */
static void workshop_form_upload_submission( PublishedFileId_t file_id,
                                                char *metadata )
{
   ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();
   UGCUpdateHandle_t handle 
      = SteamAPI_ISteamUGC_StartItemUpdate( hSteamUGC, SKATERIFT_APPID,
                                            file_id );

   /* TODO: Handle failure cases for these */

   SteamAPI_ISteamUGC_SetItemMetadata( hSteamUGC, handle, metadata );

   if( workshop_form.submission.submit_title ){
      vg_info( "Setting title\n" );
      SteamAPI_ISteamUGC_SetItemTitle( hSteamUGC, handle, 
                                       workshop_form.submission.title );
   }

   if( workshop_form.submission.submit_description ){
      vg_info( "Setting description\n" );
      SteamAPI_ISteamUGC_SetItemDescription( hSteamUGC, handle, 
                                       workshop_form.submission.description);
   }

   if( workshop_form.submission.submit_file_and_image ){
      char path_buf[4096];
      vg_str folder;
      vg_strnull( &folder, path_buf, 4096 );
      vg_strcat( &folder, vg.base_path );

      vg_strcat( &folder, workshop_filetype_folder() );
      vg_strcat( &folder, workshop_form.addon_folder );

      vg_info( "Setting item content\n" );
      SteamAPI_ISteamUGC_SetItemContent( hSteamUGC, handle, folder.buffer );
      
      vg_str preview = folder;
      vg_strcat( &preview, "/preview.jpg" );

      vg_info( "Setting preview image\n" );
      SteamAPI_ISteamUGC_SetItemPreview( hSteamUGC, handle, preview.buffer );
   }

   vg_info( "Setting visibility\n" );
   SteamAPI_ISteamUGC_SetItemVisibility( hSteamUGC, handle, 
                                 workshop_form.submission.visibility );

   vg_info( "Submitting updates\n" );
   vg_steam_async_call *call = vg_alloc_async_steam_api_call();
   call->userdata = NULL;
   call->p_handler = on_workshop_update_result;
   call->id = SteamAPI_ISteamUGC_SubmitItemUpdate( hSteamUGC, handle, "" );
}

/*
 * Steam API call result for when we've created a new item on their network, or 
 * not, if it has failed
 */
static void on_workshop_createitem( void *data, void *user )
{
   CreateItemResult_t *result = data;

   if( result->m_eResult == k_EResultOK ){
      vg_info( "Created workshop file with id: %lu\n", 
                result->m_nPublishedFileId );

      if( result->m_bUserNeedsToAcceptWorkshopLegalAgreement ){
         vg_warn( "Workshop agreement currently not accepted\n" );
      }
      
      workshop_form_upload_submission( result->m_nPublishedFileId, user );
   }
   else{
      const char *errstr = workshop_EResult_user_string( result->m_eResult );
      
      if( errstr ){
         vg_error( "ISteamUGC_CreateItem() failed(%d): '%s' \n", 
                     result->m_eResult, errstr );
      }

      workshop_form.page = k_workshop_form_closing_bad;
      workshop_form.failure_or_success_string = errstr;
   }
}

/*
 * Starts the workshop upload process through Steam API
 */
static void workshop_form_async_submit_begin( void *payload, u32 size )
{

   /* use existing file */
   if( workshop_form.submission.file_id ){
      workshop_form_upload_submission( workshop_form.submission.file_id,
                                       payload );
   }
   else{
      vg_steam_async_call *call = vg_alloc_async_steam_api_call();
      call->userdata = payload;
      call->p_handler = on_workshop_createitem;
      ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();
      call->id = SteamAPI_ISteamUGC_CreateItem( hSteamUGC, SKATERIFT_APPID, 
                                                k_EWorkshopFileTypeCommunity );
   }
}

/*
 * Downloads the framebuffer into scratch memory
 */
static void workshop_form_async_download_image( void *payload, u32 size )
{
   int w, h;
   render_fb_get_current_res( gpipeline.fb_workshop_preview, &w, &h );
   vg_linear_clear( vg_mem.scratch );
   workshop_form.img_buffer = vg_linear_alloc( vg_mem.scratch, w*h*3 );

   vg_info( "read framebuffer: glReadPixels( %dx%d )\n", w,h );

   glBindFramebuffer( GL_READ_FRAMEBUFFER, gpipeline.fb_workshop_preview->fb );
   glReadBuffer( GL_COLOR_ATTACHMENT0 );
   glReadPixels( 0,0, w,h, GL_RGB, GL_UNSIGNED_BYTE, workshop_form.img_buffer );

   workshop_form.img_w = w;
   workshop_form.img_h = h;
}

/*
 * Thread which kicks off the upload process
 */
static void _workshop_form_submit_thread( void *data )
{
   vg_async_call( workshop_form_async_download_image, NULL, 0 );
   vg_async_stall();

   char path_buf[4096];
   vg_str folder;
   vg_strnull( &folder, path_buf, 4096 );

   vg_strcat( &folder, workshop_filetype_folder() );
   vg_strcat( &folder, workshop_form.addon_folder );

   if( !vg_strgood(&folder) ){
      vg_error( "addon folder path too long\n" );
      workshop_form.op = k_workshop_op_none;
      return;
   }

   /* 
    * Create the metadata file
    * -----------------------------------------------------------------------*/
   u8 descriptor_buf[ 512 ];
   vg_msg descriptor;
   vg_msg_init( &descriptor, descriptor_buf, sizeof(descriptor_buf) );
   vg_linear_clear( vg_mem.scratch );

   /* short description */
   vg_msg_frame( &descriptor, "workshop" );
      vg_msg_wkvstr( &descriptor, "title", workshop_form.submission.title );
      //vg_msg_wkvstr( &descriptor, "author", "unknown" );
      vg_msg_wkvu32( &descriptor, "type", workshop_form.submission.type );
      vg_msg_wkvstr( &descriptor, "folder", workshop_form.addon_folder );
   vg_msg_end_frame( &descriptor );
   //vg_msg_wkvstr( &descriptor, "location", "USA" );

   char *short_descriptor_str = 
      vg_linear_alloc( vg_mem.scratch, vg_align8(descriptor.cur.co*2+1));
   vg_bin_str( descriptor_buf, short_descriptor_str, descriptor.cur.co );
   short_descriptor_str[descriptor.cur.co*2] = '\0';
   vg_info( "binstr: %s\n", short_descriptor_str );

   vg_dir dir;
   if( !vg_dir_open( &dir, folder.buffer ) ){
      vg_error( "could not open addon folder '%s'\n", folder.buffer );
      workshop_form.op = k_workshop_op_none;
      return;
   }

   while( vg_dir_next_entry(&dir) ){
      if( vg_dir_entry_type(&dir) == k_vg_entry_type_file ){
         const char *d_name = vg_dir_entry_name(&dir);
         if( d_name[0] == '.' ) continue;

         vg_str file = folder;
         vg_strcat( &file, "/" );
         vg_strcat( &file, d_name );
         if( !vg_strgood( &file ) ) continue;

         char *ext = vg_strch( &file, '.' );
         if( !ext ) continue;
         if( strcmp(ext,".mdl") ) continue;

         vg_msg_wkvstr( &descriptor, "content", d_name );
         break;
      }
   }
   vg_dir_close(&dir);

   vg_str descriptor_file = folder;
   vg_strcat( &descriptor_file, "/addon.inf" );
   if( !vg_strgood(&descriptor_file) ){
      vg_error( "Addon info path too long\n" );
      workshop_form.op = k_workshop_op_none;
      return;
   }
   
   FILE *fp = fopen( descriptor_file.buffer, "wb" );
   if( !fp ){
      vg_error( "Could not open addon info file '%s'\n", 
                descriptor_file.buffer );
      workshop_form.op = k_workshop_op_none;
      return;
   }
   fwrite( descriptor_buf, descriptor.cur.co, 1, fp );
   fclose( fp );

   /* Save the preview 
    * -----------------------------------------------------------------------*/
   vg_str preview = folder;
   vg_strcat( &preview, "/preview.jpg" );

   if( !vg_strgood(&preview) ){
      vg_error( "preview image path too long\n" );
      workshop_form.op = k_workshop_op_none;
      return;
   }

   int w = workshop_form.img_w,
       h = workshop_form.img_h;

   vg_info( "writing: %s (%dx%d @90%%)\n", preview.buffer, w,h );
   stbi_flip_vertically_on_write(1);
   stbi_write_jpg( preview.buffer, w,h, 3, workshop_form.img_buffer, 90 );

   vg_async_call( workshop_form_async_submit_begin, short_descriptor_str, 0 );
}

/*
 * Entry point for the publishing submission operation
 */
static void workshop_op_submit(void){
   /* TODO: Show these errors to the user */
   if( workshop_form.submission.submit_title ){
      if( !workshop_form.submission.title[0] ){
         ui_start_modal( "Cannot submit because a title is required\n",
                         UI_MODAL_WARN);
         workshop_form.op = k_workshop_op_none;
         return;
      }
   }

   if( workshop_form.submission.submit_description ){
      if( !workshop_form.submission.description[0] ){
         ui_start_modal( "Cannot submit because a description is required\n",
                         UI_MODAL_WARN );
         workshop_form.op = k_workshop_op_none;
         return;
      }
   }

   if( workshop_form.submission.submit_file_and_image ){
      if( workshop_form.file_intent == k_workshop_form_file_intent_none ){
         ui_start_modal( "Cannot submit because the file is "
                         "empty or unspecified\n", UI_MODAL_WARN );
         workshop_form.op = k_workshop_op_none;
         return;
      }
   }

   player_board_unload( &workshop_form.board_model );
   workshop_form.file_intent = k_workshop_form_file_intent_none;
   workshop_form.op = k_workshop_op_publishing_update;

   vg_loader_start( _workshop_form_submit_thread, NULL );
}

/*
 *  op: k_workshop_form_op_loading_model
 * -----------------------------------------------------------------------------
 */

/*
 * Reciever for completion of the model file load
 */
static void workshop_form_loadmodel_async_complete( void *payload, u32 size )
{
   v2_zero( workshop_form.view_angles );
   v3_zero( workshop_form.view_offset );
   workshop_form.view_dist = 1.0f;
   workshop_form.view_changed = 1;
   workshop_form.file_intent = k_workshop_form_file_intent_new;
   
   vg_success( "workshop async load complete\n" );
   workshop_form.op = k_workshop_op_none;
}

/*
 * Reciever for failure to load
 */
static void workshop_form_loadmodel_async_error( void *payload, u32 size ){
}

/*
 * Thread which loads the model from the disk 
 */
static void _workshop_form_load_thread( void *data )
{
   char path_buf[4096];
   vg_str folder;
   vg_strnull( &folder, path_buf, 4096 );

   vg_strcat( &folder, workshop_filetype_folder() );
   vg_strcat( &folder, workshop_form.addon_folder );

   if( !vg_strgood(&folder) ){
      vg_error( "workshop async load failed: path too long\n" );
      vg_async_call( workshop_form_loadmodel_async_error, NULL, 0 );
      workshop_form.op = k_workshop_op_none;
      return;
   }

   vg_dir dir;
   if( !vg_dir_open( &dir, folder.buffer ) ){
      vg_error( "workshop async load failed: could not open folder\n" );
      vg_async_call( workshop_form_loadmodel_async_error, NULL, 0 );
      workshop_form.op = k_workshop_op_none;
      return;
   }

   vg_info( "Searching %s for model files\n", folder.buffer );

   int found_mdl = 0;
   while( vg_dir_next_entry(&dir) ){
      if( vg_dir_entry_type(&dir) == k_vg_entry_type_file ){
         const char *d_name = vg_dir_entry_name(&dir);
         if( d_name[0] == '.' ) continue;

         vg_str file = folder;
         vg_strcat( &file, "/" );
         vg_strcat( &file, d_name );
         if( !vg_strgood( &file ) ) continue;

         char *ext = vg_strch( &file, '.' );
         if( !ext ) continue;
         if( strcmp(ext,".mdl") ) continue;
         found_mdl = 1;
         break;
      }
   }
   vg_dir_close(&dir);

   if( !found_mdl ){
      vg_error( "workshop async load failed: no model files found\n" );
      vg_async_call( workshop_form_loadmodel_async_error, NULL, 0 );
      workshop_form.op = k_workshop_op_none;
      return;
   }

   if( workshop_form.submission.type == k_addon_type_board )
      player_board_load( &workshop_form.board_model, path_buf );
   else if( workshop_form.submission.type == k_addon_type_player )
      player_model_load( &workshop_form.player_model, path_buf );

   vg_async_call( workshop_form_loadmodel_async_complete, NULL, 0 );
}

/*
 * Entry point for load model operation
 */
static void workshop_op_load_model(void){
   world_instance *world = world_current_instance();
   workshop_form.view_world = world;

   if( workshop_form.submission.type == k_addon_type_board ){
      if( mdl_arrcount( &world->ent_swspreview ) ){
         workshop_form.ptr_ent = 
               mdl_arritm( &world->ent_swspreview, 0 );
      }
      else{
         ui_start_modal( "There is no ent_swspreview in the level. \n"
                         "Cannot publish here\n", UI_MODAL_BAD );
         workshop_form.op = k_workshop_op_none;
         return;
      }
   }
   else if( workshop_form.submission.type == k_addon_type_player ){}
   else {
      ui_start_modal( "Don't know how to prepare for this item type. \n"
                      "Please contact the developers.\n", UI_MODAL_BAD );
      workshop_form.op = k_workshop_op_none;
      return;
   }

   workshop_form.op = k_workshop_op_loading_model;
   vg_loader_start( _workshop_form_load_thread, NULL );
}

/*
 * op: k_workshop_form_op_downloading_submission 
 * -----------------------------------------------------------------------------
 */

/*
 * The image has been decoded and is ready to slap into the framebuffer
 */
static void workshop_form_async_imageload( void *data, u32 len )
{
   if( data ){
      struct framebuffer_attachment *a = 
         &gpipeline.fb_workshop_preview->attachments[0];

      glBindTexture( GL_TEXTURE_2D, a->id );
      glTexSubImage2D( GL_TEXTURE_2D, 0,0,0,
                        WORKSHOP_PREVIEW_WIDTH, WORKSHOP_PREVIEW_HEIGHT, 
                        a->format, a->type, data );
      stbi_image_free( data );
      vg_success( "Loaded workshop preview image\n" );
   }
   else{
      snprintf( workshop_form.error_msg, sizeof(workshop_form.error_msg),
               "Preview image could not be loaded. Reason: %s\n",
                stbi_failure_reason() );
      ui_start_modal( workshop_form.error_msg, UI_MODAL_BAD );
   }
   workshop_form.op = k_workshop_op_none;
}

/*
 * Load the image located at ./workshop_preview.jpg into our framebuffer
 */
static void _workshop_load_preview_thread( void *data ){
   char path_buf[ 4096 ];
   vg_str path;
   vg_strnull( &path, path_buf, 4096 );
   vg_strcat( &path, workshop_filetype_folder() );
   vg_strcat( &path, workshop_form.addon_folder );
   vg_strcat( &path, "/preview.jpg" );

   if( vg_strgood( &path ) ){
      stbi_set_flip_vertically_on_load(1);
      int x, y, nc;
      u8 *rgb = stbi_load( path.buffer, &x, &y, &nc, 3 );

      if( rgb ){
         if( (x == WORKSHOP_PREVIEW_WIDTH) && (y == WORKSHOP_PREVIEW_HEIGHT) ){
            vg_async_call( workshop_form_async_imageload, rgb, x*y*3 );
         }
         else{
            vg_error( "Resolution does not match framebuffer, so we can't"
                      " show it\n" );
            stbi_image_free( rgb );
            vg_async_call( workshop_form_async_imageload, NULL, 0 );
         }
      }
      else{
         vg_async_call( workshop_form_async_imageload, NULL, 0 );
      }
   }
   else{
      vg_async_call( workshop_form_async_imageload, NULL, 0 );
   }
}

/*
 * Entry point to view operation
 */
static void workshop_op_download_and_view_submission( int result_index )
{
   workshop_form.op = k_workshop_op_downloading_submission;
   ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();
   ISteamRemoteStorage *hSteamRemoteStorage = SteamAPI_SteamRemoteStorage();
   SteamUGCDetails_t details;
   if( SteamAPI_ISteamUGC_GetQueryUGCResult( hSteamUGC, 
                                             workshop_form.ugc_query.handle,
                                             result_index,
                                             &details ) )
   {
      workshop_reset_submission_data();
      workshop_form.submission.submit_description = 0;
      workshop_form.submission.submit_file_and_image = 0;
      workshop_form.submission.submit_title = 0;

      u8 metadata_buf[512];
      char metadata_str[1024+1];
      int have_meta = SteamAPI_ISteamUGC_GetQueryUGCMetadata( hSteamUGC, 
                                              workshop_form.ugc_query.handle,
                                              result_index, metadata_str, 
                                              1024+1 );

      vg_strncpy( details.m_rgchDescription, 
                  workshop_form.submission.description, 
                  vg_list_size( workshop_form.submission.description ),
                  k_strncpy_always_add_null );

      vg_strncpy( details.m_rgchTitle,
                  workshop_form.submission.title,
                  vg_list_size( workshop_form.submission.title ),
                  k_strncpy_always_add_null );

      snprintf( workshop_form.addon_folder, 
                 vg_list_size( workshop_form.addon_folder ),
                 "Steam Cloud ("PRINTF_U64")", details.m_nPublishedFileId );

      workshop_form.submission.file_id = details.m_nPublishedFileId;
      workshop_form.file_intent = k_workshop_form_file_intent_keep_old;
      workshop_form.page = k_workshop_form_edit;
      workshop_form.submission.visibility = details.m_eVisibility;
      workshop_form.submission.type = k_addon_type_none;
      workshop_form.submission.submission_type_selection = k_addon_type_none;

      if( have_meta ){
         u32 len = strlen(metadata_str);
         vg_info( "Metadata: %s\n", metadata_str );
         vg_str_bin( metadata_str, metadata_buf, len );
         vg_msg msg;
         vg_msg_init( &msg, metadata_buf, len/2 );
         
         if( vg_msg_seekframe( &msg, "workshop" )){
            u32 type = vg_msg_getkvu32( &msg, "type", 0 );
            workshop_form.submission.type = type;
            workshop_form.submission.submission_type_selection = type;

            const char *kv_folder = vg_msg_getkvstr( &msg, "folder" );
            if( kv_folder ){
               vg_strncpy( kv_folder, workshop_form.addon_folder,
                           sizeof(workshop_form.addon_folder),
                           k_strncpy_always_add_null );
            }
         }
      }
      else{
         vg_error( "No metadata was returned with this item.\n" );
      }

      render_fb_bind( gpipeline.fb_workshop_preview, 0 );
      glClearColor( 0.2f, 0.0f, 0.0f, 1.0f );
      glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
      glBindFramebuffer( GL_FRAMEBUFFER, 0 );
      glViewport( 0,0, vg.window_x, vg.window_y );

      vg_loader_start( _workshop_load_preview_thread, NULL );
   }
   else{
      vg_error( "GetQueryUGCResult: Index out of range\n" );
      workshop_form.op = k_workshop_op_none;
   }
}

/*
 * Regular stuff
 * -----------------------------------------------------------------------------
 */

/*
 * View a page of results on the sidebar
 */
static void workshop_view_page( int req )
{
   if( workshop_form.ugc_query.result != k_EResultOK ){
      vg_error( "Tried to change page without complete data\n" );
      workshop_form.op = k_workshop_op_none;
      return;
   }

   int page = VG_MAX(VG_MIN(req, workshop_form.view_published_page_count-1),0),
       start = page * WORKSHOP_VIEW_PER_PAGE,
       end   = VG_MIN( (page+1) * WORKSHOP_VIEW_PER_PAGE, 
                       workshop_form.ugc_query.returned_item_count ),
       count = end-start;

   vg_info( "View page %d\n", page );

   workshop_form.view_published_page_id = page;
   workshop_form.published_files_list_length = count;
   ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();

   for( int i=0; i<count; i ++ ){
      struct published_file *pfile = &workshop_form.published_files_list[i];

      SteamUGCDetails_t details;
      if( SteamAPI_ISteamUGC_GetQueryUGCResult( hSteamUGC, 
                                                workshop_form.ugc_query.handle,
                                                start+i,
                                                &details ) )
      {
         if( details.m_eResult != k_EResultOK ){
            snprintf( pfile->title, 80, "Error (%d)", details.m_eResult );
         }
         else{
            vg_strncpy( details.m_rgchTitle, pfile->title, 80,
                        k_strncpy_always_add_null );
         }

         pfile->result = details.m_eResult;
         pfile->result_index = start+i;
      }
      else{
         pfile->result = k_EResultValueOutOfRange;
         pfile->result_index = -1;
         snprintf( pfile->title, 80, "Error (invalid index)" );
      }
   }
}

/*
 * Steam API result for when we recieve submitted UGC information about the user
 */
static void on_workshop_UGCQueryComplete( void *data, void *userdata )
{
   SteamUGCQueryCompleted_t *query = data;
   workshop_form.ugc_query.result = query->m_eResult;

   if( query->m_eResult == k_EResultOK ){
      if( query->m_unTotalMatchingResults > 50 ){
         vg_warn( "You have %d items submitted, "
                  "we can only view the last 50\n" );
      }

      workshop_form.ugc_query.all_item_count = query->m_unTotalMatchingResults;
      workshop_form.ugc_query.returned_item_count =
                                             query->m_unNumResultsReturned;

      workshop_form.ugc_query.handle = query->m_handle;
      workshop_form.view_published_page_count = 
         (query->m_unNumResultsReturned+WORKSHOP_VIEW_PER_PAGE-1)/
            WORKSHOP_VIEW_PER_PAGE;
      workshop_form.view_published_page_id = 0;
      workshop_form.published_files_list_length = 0;

      workshop_view_page( 0 );
   }
   else{
      vg_error( "Steam UGCQuery failed (%d)\n", query->m_eResult );
      workshop_form.view_published_page_count = 0;
      workshop_form.view_published_page_id = 0;
      workshop_form.published_files_list_length = 0;

      ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();
      SteamAPI_ISteamUGC_ReleaseQueryUGCRequest( hSteamUGC, query->m_handle );
   }
}

/*
 * Console command to open the workshop publisher
 */
static int workshop_submit_command( int argc, const char *argv[] )
{
   if( !steam_ready ){
      ui_start_modal( "Steam API is not initialized\n", UI_MODAL_BAD );
      return 0;
   }

   workshop_form.page = k_workshop_form_open;
   workshop_form.view_published_page_count = 0;
   workshop_form.view_published_page_id = 0;
   workshop_form.published_files_list_length = 0;
   workshop_form.ugc_query.result = k_EResultNone;

   vg_steam_async_call *call = vg_alloc_async_steam_api_call();

   ISteamUser *hSteamUser = SteamAPI_SteamUser();
   CSteamID steamid;
   steamid.m_unAll64Bits = SteamAPI_ISteamUser_GetSteamID( hSteamUser );

   ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();
   call->p_handler = on_workshop_UGCQueryComplete;
   call->userdata = NULL;
   UGCQueryHandle_t handle = SteamAPI_ISteamUGC_CreateQueryUserUGCRequest
              ( 
                hSteamUGC,
                steamid.m_comp.m_unAccountID,
                k_EUserUGCList_Published, 
                k_EUGCMatchingUGCType_Items,
                k_EUserUGCListSortOrder_CreationOrderDesc,
                SKATERIFT_APPID, SKATERIFT_APPID,
                1 );
   SteamAPI_ISteamUGC_SetReturnMetadata( hSteamUGC, handle, 1 );
   call->id = SteamAPI_ISteamUGC_SendQueryUGCRequest( hSteamUGC, handle );
   return 0;
}

static void workshop_init(void)
{
   vg_console_reg_cmd( "workshop_submit", workshop_submit_command, NULL );
}

static void workshop_render_world_preview(void){
   render_fb_bind( gpipeline.fb_workshop_preview, 0 );

   glClearColor( 0.0f, 0.0f, 0.3f, 1.0f );
   glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
   glEnable( GL_DEPTH_TEST );
   glDisable( GL_BLEND );

   render_world( world_current_instance(), &skaterift.cam, 0, 0, 1, 1 );

   glBindFramebuffer( GL_FRAMEBUFFER, 0 );
   glViewport( 0,0, vg.window_x, vg.window_y );
}

/*
 * Redraw the playermodel into the workshop framebuffer 
 */
static void workshop_render_player_preview(void){
   render_fb_bind( gpipeline.fb_workshop_preview, 0 );
   glClearColor( 0.16f, 0.15f, 0.15f, 1.0f );
   glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
   glEnable( GL_DEPTH_TEST );
   glDisable( GL_BLEND );

   struct skeleton *sk = &localplayer.skeleton;

   player_pose res;
   res.type = k_player_pose_type_ik;

   struct skeleton_anim *anim = skeleton_get_anim( sk, "idle_cycle+y" );
   skeleton_sample_anim( sk, anim, vg.time*0.1f, res.keyframes );
   q_axis_angle( res.root_q, (v3f){0.0f,1.0f,0.0f}, VG_PIf );
   v3_zero( res.root_co );
   res.root_co[1] = 200.0f;

   m4x3f transform;
   q_m3x3( res.root_q, transform );
   v3_copy( res.root_co, transform[3] );

   /* TODO: Function. */
   skeleton_apply_pose( sk, res.keyframes, k_anim_apply_defer_ik, 
                        localplayer.final_mtx );
   skeleton_apply_ik_pass( sk, localplayer.final_mtx );
   skeleton_apply_pose( sk, res.keyframes, k_anim_apply_deffered_only,
                        localplayer.final_mtx );
   skeleton_apply_inverses( sk, localplayer.final_mtx );
   skeleton_apply_transform( sk, transform, localplayer.final_mtx );

   camera cam;
   v3_copy( (v3f){ 0.0f, 201.7f, 1.2f }, cam.pos );
   
   cam.nearz = 0.01f;
   cam.farz = 100.0f;
   cam.fov = 57.0f;
   v3_zero( cam.angles );
   
   camera_update_transform( &cam );
   camera_update_view( &cam );
   camera_update_projection( &cam );
   camera_finalize( &cam );

   render_playermodel( &cam, world_current_instance(), 0, 
                       &workshop_form.player_model, sk, localplayer.final_mtx );

   glBindFramebuffer( GL_FRAMEBUFFER, 0 );
   glViewport( 0,0, vg.window_x, vg.window_y );
}

/*
 * Redraw the model file into the workshop framebuffer
 */
static void workshop_render_board_preview(void){
   if( !workshop_form.ptr_ent ){
      return;
   }

   render_fb_bind( gpipeline.fb_workshop_preview, 0 );

   glClearColor( 0.0f, 0.0f, 0.3f, 1.0f );
   glClear( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
   glEnable( GL_DEPTH_TEST );
   glDisable( GL_BLEND );

   ent_swspreview *swsprev = workshop_form.ptr_ent;
   world_instance *world = workshop_form.view_world;

   ent_camera *ref = mdl_arritm( &world->ent_camera, 
                                 mdl_entity_id_id(swsprev->id_camera) );
   ent_marker *display = mdl_arritm( &world->ent_marker,
                                 mdl_entity_id_id(swsprev->id_display) ),
              *display1= mdl_arritm( &world->ent_marker,
                                 mdl_entity_id_id(swsprev->id_display1) );

   v3f baseco;
   v3_add( display->transform.co, display1->transform.co, baseco );
   v3_muls( baseco, 0.5f, baseco );

   camera cam;
   v3f basevector;
   v3_sub( display->transform.co, ref->transform.co, basevector );
   float dist = v3_length( basevector );

   v3f baseangles;
   v3_angles( basevector, baseangles );

   v2_add( workshop_form.view_angles, baseangles, cam.angles );
   cam.angles[2] = 0.0f;

   float sX = sinf( cam.angles[0] ),
         cX = cosf( cam.angles[0] ),
         sY = sinf( cam.angles[1] ),
         cY = cosf( cam.angles[1] );

   v3f offset = { -sX * cY, sY, cX * cY };

   v3_muladds( display->transform.co, offset, 
               dist*workshop_form.view_dist, cam.pos );

   cam.pos[0] += -sX*workshop_form.view_offset[2];
   cam.pos[2] +=  cX*workshop_form.view_offset[2];
   cam.pos[0] +=  cX*workshop_form.view_offset[0];
   cam.pos[2] +=  sX*workshop_form.view_offset[0];
   cam.pos[1] += workshop_form.view_offset[1];

   cam.nearz = 0.01f;
   cam.farz  = 100.0f;
   cam.fov   = ref->fov;
   
   camera_update_transform( &cam );
   camera_update_view( &cam );
   camera_update_projection( &cam );
   camera_finalize( &cam );

   m4x3f mmdl, mmdl1;
   mdl_transform_m4x3( &display->transform, mmdl );
   mdl_transform_m4x3( &display1->transform, mmdl1 );

   /* force update this for nice shadows. its usually set in the world
    * pre-render step, but that includes timer stuff 
    */
   struct player_board *board = &workshop_form.board_model;
   struct ub_world_lighting *ubo = &world->ub_lighting;
   v3f vp0, vp1;
   v3_copy((v3f){0.0f,0.1f, board->truck_positions[0][2]}, vp0 );
   v3_copy((v3f){0.0f,0.1f, board->truck_positions[1][2]}, vp1 );
   m4x3_mulv( mmdl1, vp0, ubo->g_board_0 );
   m4x3_mulv( mmdl1, vp1, ubo->g_board_1 );
   glBindBuffer( GL_UNIFORM_BUFFER, world->ubo_lighting );
   glBufferSubData( GL_UNIFORM_BUFFER, 0, 
                    sizeof(struct ub_world_lighting), &world->ub_lighting );

   render_world( world, &cam, 0, 0, 0, 0 );
   struct player_board_pose pose = {0};
   render_board( &cam, world, board, mmdl,  &pose, k_board_shader_entity );
   render_board( &cam, world, board, mmdl1, &pose, k_board_shader_entity );

   glBindFramebuffer( GL_FRAMEBUFFER, 0 );
   glViewport( 0,0, vg.window_x, vg.window_y );
}

/*
 * ImGUI section for workshop form
 * -----------------------------------------------------------------------------
 */

static void workshop_changed_model_path( char *buf, u32 len ){
   workshop_form.submission.submit_file_and_image = 1;
}

static void workshop_changed_title( char *buf, u32 len ){
   workshop_form.submission.submit_title = 1;
}

static void workshop_changed_description( char *buf, u32 len ){
   workshop_form.submission.submit_description = 1;
}

static void workshop_form_gui_page_undecided( ui_rect content ){
   ui_rect box;
   rect_copy( content, box );
   box[3] = 128;
   box[2] = (box[2]*2)/3;
   ui_rect_center( content, box );

   ui_rect row;
   ui_split( box, k_ui_axis_h, 28, 0, row, box );
   ui_text( row, "Select the type of item\n", 1, k_ui_align_middle_center,0);
   ui_split( box, k_ui_axis_h, 28, 0, row, box );
   ui_enum( row, "Type:", workshop_form_type_opts,
               4, &workshop_form.submission.submission_type_selection );
   ui_split( box, k_ui_axis_h, 8, 0, row, box );
   ui_split( box, k_ui_axis_h, 28, 0, row, box );

   ui_rect button_l, button_r;
   rect_copy( row, button_l );
   button_l[2] = 128*2;
   ui_rect_center( row, button_l );
   ui_split_ratio( button_l, k_ui_axis_v, 0.5f, 2, button_l, button_r );

   enum addon_type type = workshop_form.submission.submission_type_selection;
   if( type != k_addon_type_none){
      if( ui_button_text( button_l, "OK", 1 ) == 1 ){
         workshop_form.submission.type = type;

         if( type == k_addon_type_world ){
            workshop_form.view_changed = 1;
            workshop_form.file_intent = k_workshop_form_file_intent_new;
         }
      }
   }
   else{
      ui_fill( button_l, ui_colour(k_ui_bg) );
      ui_text( button_l, "OK", 1, k_ui_align_middle_center, 
               ui_colour(k_ui_bg+4) );
   }
   
   if( ui_button_text( button_r, "Cancel", 1 ) == 1 ){
      workshop_form.page = k_workshop_form_open;
      workshop_form.file_intent = k_workshop_form_file_intent_none;
   }
}

static void workshop_form_gui_draw_preview( ui_rect img_box ){
   enum addon_type type = workshop_form.submission.type;
   if( workshop_form.file_intent == k_workshop_form_file_intent_keep_old ){
      ui_image( img_box, gpipeline.fb_workshop_preview->attachments[0].id );
   }
   else if( workshop_form.file_intent == k_workshop_form_file_intent_new ){
      ui_image( img_box, gpipeline.fb_workshop_preview->attachments[0].id );

      if( type == k_addon_type_world ){
         return;
      }

      int hover  = ui_inside_rect( img_box, vg_ui.mouse ),
          target = ui_inside_rect( img_box, vg_ui.mouse_click );
      
      if( ui_click_down(UI_MOUSE_MIDDLE) && target ){
         v3_copy( workshop_form.view_offset,
                  workshop_form.view_offset_begin );
      }
      else if( ui_click_down(UI_MOUSE_LEFT) && target ){
         v2_copy( workshop_form.view_angles, 
                  workshop_form.view_angles_begin );
      }

      if( ui_clicking(UI_MOUSE_MIDDLE) && target ){
         v2f delta = { vg_ui.mouse[0]-vg_ui.mouse_click[0],
                       vg_ui.mouse[1]-vg_ui.mouse_click[1] };

         float *begin  = workshop_form.view_offset_begin,
               *offset = workshop_form.view_offset;
         offset[0] = vg_clampf( begin[0]-delta[0]*0.002f, -1.0f, 1.0f );
         offset[2] = vg_clampf( begin[2]-delta[1]*0.002f, -1.0f, 1.0f );
         workshop_form.view_changed = 1;
      }
      else if( ui_clicking(UI_MOUSE_LEFT) && target ){
         v2f delta = { vg_ui.mouse[0]-vg_ui.mouse_click[0],
                       vg_ui.mouse[1]-vg_ui.mouse_click[1] };

         v2f angles;
         v2_muladds( workshop_form.view_angles_begin, delta, 0.002f, angles);

         float limit = VG_PIf*0.2f;

         angles[0] = vg_clampf( angles[0], -limit, limit );
         angles[1] = vg_clampf( angles[1], -limit, limit );

         v2_copy( angles, workshop_form.view_angles );
         workshop_form.view_changed = 1;
      }

      if( !ui_clicking(UI_MOUSE_LEFT) && hover ){
         float zoom = workshop_form.view_dist;
         zoom += vg.mouse_wheel[1] * -0.07f;
         zoom = vg_clampf( zoom, 0.4f, 2.0f );
         
         if( zoom != workshop_form.view_dist ){
            workshop_form.view_changed = 1;
            workshop_form.view_dist = zoom;
         }
      }
   }
   else{
      ui_text( img_box, "No image", 1, k_ui_align_middle_center,
               ui_colour( k_ui_orange ) );
   }
}

static void workshop_form_gui_edit_page( ui_rect content ){
   enum addon_type type = workshop_form.submission.type;

   if( type == k_addon_type_none ){
      workshop_form_gui_page_undecided( content );
      return;
   }

   ui_rect image_plane;
   ui_split( content, k_ui_axis_h, 300, 0, image_plane, content );
   ui_fill( image_plane, ui_colour( k_ui_bg+0 ) );

   ui_rect img_box;
   ui_fit_item( image_plane, (ui_px[2]){ 3, 2 }, img_box );
   workshop_form_gui_draw_preview( img_box );

   /* file path */
   ui_rect file_button, file_label;

   char buf[128];
   snprintf( buf, 128, 
             "Addon folder: skaterift/%s", workshop_filetype_folder() );

   if( type == k_addon_type_world ){
      struct ui_textbox_callbacks callbacks = {
         .change = workshop_changed_model_path
      };
      ui_textbox( content, buf, workshop_form.addon_folder,
                  vg_list_size(workshop_form.addon_folder), 1, 0, &callbacks );
   }
   else{
      ui_rect file_entry;
      ui_standard_widget( content, file_entry, 1 );
      ui_split( file_entry, k_ui_axis_v, -128, 0, file_entry, file_button );

      if( workshop_form.file_intent != k_workshop_form_file_intent_none ){
         ui_text( file_entry, workshop_form.addon_folder, 1, 
                  k_ui_align_middle_left, ui_colour( k_ui_fg+4 ) );

         if( ui_button_text( file_button, "Remove", 1 ) == 1 ){
            if( type == k_addon_type_board )
               player_board_unload( &workshop_form.board_model );
            else if( type == k_addon_type_player )
               player_model_unload( &workshop_form.player_model );

            workshop_form.file_intent = k_workshop_form_file_intent_none;
            workshop_form.addon_folder[0] = '\0';
         }
      }
      else{
         struct ui_textbox_callbacks callbacks = {
            .change = workshop_changed_model_path
         };

         ui_textbox( file_entry, buf, workshop_form.addon_folder,
                     vg_list_size(workshop_form.addon_folder), 1,
                     0, &callbacks );

         if( ui_button_text( file_button, "Load", 1 ) == 1 ){
            workshop_op_load_model();
         }
      }
   }

   const char *str_title = "Title:", *str_desc = "Description:";

   /* title box */
   {
      struct ui_textbox_callbacks callbacks = {
         .change = workshop_changed_title
      };
      ui_textbox( content, str_title, workshop_form.submission.title, 
                  vg_list_size(workshop_form.submission.title), 1,
                  0, &callbacks );
   }

   /* visibility option */
   {
      ui_enum( content, "Visibility:", workshop_form_visibility_opts,
               4, &workshop_form.submission.visibility );
   }

   /* description box */
   {
      struct ui_textbox_callbacks callbacks = {
         .change = workshop_changed_description
      };
      ui_textbox( content, str_desc, workshop_form.submission.description,
                  vg_list_size(workshop_form.submission.description), 4,
                  UI_TEXTBOX_MULTILINE|UI_TEXTBOX_WRAP, &callbacks );
   }

   /* submissionable */
   ui_rect final_row;
   ui_split( content, k_ui_axis_h, content[3]-32-8, 0, content, final_row );

   ui_rect submission_center;
   rect_copy( final_row, submission_center );
   submission_center[2] = 256;
   ui_rect_center( final_row, submission_center );

   ui_rect btn_left, btn_right;
   ui_split_ratio( submission_center, k_ui_axis_v, 0.5f, 8, 
                   btn_left, btn_right );

   if( ui_button_text( btn_left, "Publish", 1 ) == 1 ){
      workshop_op_submit();
   }
   if( ui_button_text( btn_right, "Cancel", 1 ) == 1 ){
      workshop_form.page = k_workshop_form_open;
      player_board_unload( &workshop_form.board_model );
      workshop_form.file_intent = k_workshop_form_file_intent_none;
   }

   /* disclaimer */
   const char *disclaimer_text = 
      "By submitting this item, you agree to the workshop terms of service";

   ui_rect disclaimer_row, inner, link;
   ui_split( content, k_ui_axis_h, content[3]-32, 0, content, disclaimer_row );

   ui_px btn_width = 32;

   rect_copy( disclaimer_row, inner );
   inner[2] = ui_text_line_width( disclaimer_text ) + btn_width+8;

   ui_rect label;
   ui_rect_center( disclaimer_row, inner );
   ui_split( inner, k_ui_axis_v, inner[2]-btn_width, 0, label, btn_right);
   ui_rect_pad( btn_right, (ui_px[2]){2,2} );

   if( ui_button_text( btn_right, "\xbf", 2 ) == 1 ){
      ISteamFriends *hSteamFriends = SteamAPI_SteamFriends();
      SteamAPI_ISteamFriends_ActivateGameOverlayToWebPage( hSteamFriends,
            "https://steamcommunity.com/sharedfiles/workshoplegalagreement",
            k_EActivateGameOverlayToWebPageMode_Default );
   }

   ui_text( label, disclaimer_text, 1, k_ui_align_middle_left,
            ui_colour( k_ui_fg+4 ) );
}

static void workshop_form_gui_sidebar( ui_rect sidebar )
{
   ui_fill( sidebar, ui_colour( k_ui_bg+2 ) );

   ui_rect title;
   ui_split( sidebar, k_ui_axis_h, 28, 0, title, sidebar );

   if( workshop_form.page == k_workshop_form_edit ){
      ui_text( title, "Editing", 1, k_ui_align_middle_center, 0 );
      ui_split( sidebar, k_ui_axis_h, 28, 0, title, sidebar );

      if( workshop_form.submission.type != k_addon_type_none ){
         char buf[512];
         vg_str str;
         vg_strnull( &str, buf, 512 );

         if( workshop_form.submission.file_id )
            vg_strcat( &str, "Editing an existing " );
         else
            vg_strcat( &str, "Creating a new " );

         if( workshop_form.submission.type == k_addon_type_board )
            vg_strcat( &str, "skateboard." );
         else if( workshop_form.submission.type == k_addon_type_world )
            vg_strcat( &str, "world." );
         else if( workshop_form.submission.type == k_addon_type_player )
            vg_strcat( &str, "playermodel." );
         else
            vg_strcat( &str, "???." );

         ui_text( title, buf, 1, k_ui_align_middle_center, 
                  ui_colour(k_ui_fg+4) );
      }
      return;
   }

   /* 
    * sidebar existing entries panel
    */
   ui_text( title, "Your submissions", 1, k_ui_align_middle_center, 0 );

   ui_rect controls, btn_create_new;
   ui_split( sidebar, k_ui_axis_h,  32, 0, controls, sidebar );
   ui_split( sidebar, k_ui_axis_h, -32, 0, sidebar, btn_create_new );
   ui_fill( controls, ui_colour( k_ui_bg+1 ) );

   char buf[32];
   vg_str str;
   vg_strnull( &str, buf, sizeof(buf) );
   vg_strcat( &str, "page " );
   vg_strcati32( &str,  workshop_form.view_published_page_id+1 );
   vg_strcatch( &str, '/' );
   vg_strcati32( &str, workshop_form.view_published_page_count );

   ui_rect_pad( controls, (ui_px[2]){0,4} );
   ui_rect info;
   ui_split_ratio( controls, k_ui_axis_v, 0.25f, 0, info, controls );
   ui_text( info, buf, 1, k_ui_align_middle_center, 0 );

   ui_rect btn_left, btn_right;
   ui_split_ratio( controls, k_ui_axis_v, 0.5f, 2, btn_left, btn_right );
            
   if( ui_button_text( btn_left, "newer", 1 ) == 1 ){
      workshop_view_page( workshop_form.view_published_page_id-1 );
   }

   if( ui_button_text( btn_right, "older", 1 ) == 1 ){
      workshop_view_page( workshop_form.view_published_page_count+1 );
   }

   if( ui_button_text( btn_create_new, "Create New Item", 1 ) == 1 ){
      workshop_reset_submission_data();
      workshop_form.submission.submit_title = 1;
      workshop_form.submission.submit_description = 1;
      workshop_form.submission.submit_file_and_image = 1;
      workshop_form.page = k_workshop_form_edit;
   }

   for( int i=0; i<workshop_form.published_files_list_length; i++ ){
      ui_rect item;
      ui_split( sidebar, k_ui_axis_h, 28, 0, item, sidebar );
      ui_rect_pad( item, (ui_px[2]){4,4} );
      
      struct published_file *pfile = &workshop_form.published_files_list[i];
      if( ui_button_text( item, pfile->title, 1 ) == 1 ){
         if( pfile->result == k_EResultOK ){
            vg_info( "Select index: %d\n", pfile->result_index );
            workshop_op_download_and_view_submission( pfile->result_index );
         }
         else{
            vg_warn( "Cannot select that item, result not OK\n" );
         }
      }
   }
}

static void workshop_form_gui(void)
{
   enum workshop_form_page stable_page = workshop_form.page;
   if( stable_page == k_workshop_form_hidden ) return;

   ui_rect null;
   ui_rect screen = { 0, 0, vg.window_x, vg.window_y };
   ui_rect window = { 0, 0, 1000, 700 };
   ui_rect_center( screen, window );
   vg_ui.wants_mouse = 1;

   ui_fill( window, ui_colour( k_ui_bg+1 ) );
   ui_outline( window, 1, ui_colour( k_ui_bg+7 ), 0 );

   ui_rect title, panel;
   ui_split( window, k_ui_axis_h, 28, 0, title, panel );
   ui_fill( title, ui_colour( k_ui_bg+7 ) );
   ui_text( title, "Workshop tool", 1, k_ui_align_middle_center, 
            ui_colourcont(k_ui_bg+7) );

   ui_rect quit_button;
   ui_split( title, k_ui_axis_v, title[2]-title[3], 2, title, quit_button );

   if( vg_loader_availible() ){
      if( ui_button_text( quit_button, "X", 1 ) == 1 ){
         workshop_quit_form();
         return;
      }
   }

   /* 
    * temporary operation blinders, we don't yet have a nice way to show the
    * user that we're doing something uninterruptable, so the code just 
    * escapes here and we show them a basic string
    */

   if( workshop_form.op != k_workshop_op_none ){
      const char *op_string = "The programmer has not bothered to describe "
                              "the current operation that is running.";

      switch( workshop_form.op ){
         case k_workshop_op_loading_model:
            op_string = "Operation in progress: Loading model file.";
         break;
         case k_workshop_op_publishing_update:
            op_string = "Operation in progress: publishing submission update "
                        "to steam.";
         break;
         case k_workshop_op_downloading_submission:
            op_string = "Operation in progress: downloading existing submission"
                        " from Steam services.";
         break;
         default: break;
      }

      ui_text( panel, op_string, 1, k_ui_align_middle_center, 0 );
      return;
   }

   /* re draw board preview if need to */
   if( (stable_page == k_workshop_form_edit) && 
       workshop_form.view_changed && 
       workshop_form.file_intent == k_workshop_form_file_intent_new )
   {
      enum addon_type type = workshop_form.submission.type;
      if( type == k_addon_type_board ){
         workshop_render_board_preview();
      }
      else if( type == k_addon_type_world ){
         vg_success( "Renders world preview\n" );
         workshop_render_world_preview();
      }
      else if( type == k_addon_type_player ){
         workshop_render_player_preview();
      }

      workshop_form.view_changed = 0;
   }

   struct workshop_form *form = &workshop_form;

   ui_rect sidebar, content;
   ui_split_ratio( panel, k_ui_axis_v, 0.3f, 1, sidebar, content );

   /* content page */
   ui_rect_pad( content, (ui_px[2]){8,8} );

   if( stable_page == k_workshop_form_edit ){
      workshop_form_gui_edit_page( content );
   }
   else if( stable_page == k_workshop_form_open ){
      ui_text( content, "Nothing selected.", 1, k_ui_align_middle_center,
               ui_colour( k_ui_fg+4 ) );
   }
   else if( stable_page >= k_workshop_form_cclosing ){
      ui_rect submission_row;
      ui_split( content, k_ui_axis_h, content[3]-32-8, 0, content, 
                   submission_row );

      u32 colour;

      if( stable_page == k_workshop_form_closing_bad )
         colour = ui_colour( k_ui_red+k_ui_brighter );
      else
         colour = ui_colour( k_ui_green+k_ui_brighter );

      ui_text( content, workshop_form.failure_or_success_string, 1, 
               k_ui_align_middle_center, colour );

      ui_rect submission_center;
      rect_copy( submission_row, submission_center );
      submission_center[2] = 128;
      ui_rect_center( submission_row, submission_center );
      ui_rect_pad( submission_center, (ui_px[2]){8,8} );

      if( ui_button_text( submission_center, "OK", 1 ) == 1 ){
         workshop_form.page = k_workshop_form_open;
      }
   }

   workshop_form_gui_sidebar( sidebar );
}

/*
 * Some async api stuff
 * -----------------------------------------------------------------------------
 */

static void async_workshop_get_filepath( void *data, u32 len )
{
   struct async_workshop_filepath_info *info = data;

   u64 _size;
   u32 _ts;

   ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();
   if( !SteamAPI_ISteamUGC_GetItemInstallInfo( hSteamUGC, info->id, &_size,
                                               info->buf, info->len, &_ts ))
   {
      vg_error( "GetItemInstallInfo failed\n" );
      info->buf[0] = '\0';
   }
}

static void async_workshop_get_installed_files( void *data, u32 len )
{
   struct async_workshop_installed_files_info *info = data;

   ISteamUGC *hSteamUGC = SteamAPI_SteamUGC();
   u32 count = SteamAPI_ISteamUGC_GetSubscribedItems( hSteamUGC, info->buffer,
                                                      *info->len );

   vg_info( "Found %u subscribed items\n", count );

   u32 j=0;
   for( u32 i=0; i<count; i++ ){
      u32 state = SteamAPI_ISteamUGC_GetItemState( hSteamUGC, info->buffer[i] );
      if( state & k_EItemStateInstalled ){
         info->buffer[j ++] = info->buffer[i];
      }
   }

   *info->len = j;
}

#endif /* WORKSHOP_C */