/*

  Copyright 2008 Nathan Phillip Brink, Ethan Zonca

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

  it under the terms of the GNU Affero General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen is distributed in the hope that it will be useful,

  but WITHOUT ANY WARRANTY; without even the implied warranty of

  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  GNU Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

/* This file contains the code which both processes (renders) jobs as a slave, and the code which distributes frames to slaves after receiving them from the client portion of the codebase. */

 /* Just some notes -- Ethan Zonca

 * ++ Make data availible for other apps to parse

 * Server<==>Client Communication

 * Upload while rendering

 */

#include <stdio.h>

#include "execio.h"

// needs to be implemented

#include "options.h"

#include <confuse.h>

#define max 100

// maximum number of stored jobs in memory, per job type (lux/blend). Eventually we can dump this data to disk, or atleast the remainder not in memory...

int jobnum = 0;

int hcfjob; //highest consecutively finished job

int highest_jobnum; // The job number of the most recently created job, this is used when creating new jobs

// Structures for storing job information

// OOOOOOkay so we really need a struct for frameset rather than just an array, because we should track who each frame was sent out to. Please do this, someone! :D

struct {

  char *name;

  char *submitter;

  char *email;

  int priority;  // 1 is lowest, 10 is highest, 0 is done

  int percent_done;

  int completed_frames; // number of completed frames

  int total_frames; // how many frames are in the animation

  struct frameset **frameset; // What exactly is this now? hehe

} blendjob[max];

// -- Matthew's handywork --

// struct for storing informaiton on each frame for a particular blender job

struct {

	int frame_num; // frame number to render

	char slave_name; // user that frame is assigned to

	int frame_status; // status of frame, 0= unassigned, 1= taken, 2= done

	// For secondary upload location...

	char url;

	char login_name;

	char login_pass;

} frameset[frame_count]; // Frame count is the frame number if the animation starts on zero... but animations start at frame 1

                         // Using this method to save memory, because if animation starts on a high frame number, it would waste a lot of RAM on empty structures

// -- end of Matthew's handywork --

struct {

  char *name;

  char *submitter;

  char *email;

  int priority;

  int mode; // 0 = Static Render, stop at Spp, or infinity if spp is null. Framerange is ignored || 1 = animation, stop at Spp and stay in framerange.

  int spp;

  struct frameset ** frameset;

} luxjob[max];

int main(int argc, char *argv[])

{

/* !!!!!!! Important notes !!!!!!!!!!!!

So, we need a common key. Maybe. Or we need to generate a key in registeruser() and get it to the client somehow.

If we use a common key, then we'll need different passphrases for each user, which would be kinda crazy. How can

we get a key generated on the server, and transferred to the client's distrend?

*/

  int cont = 1;

  struct distrend_listenset *listenset;

  struct distrend_config *config;

  distrend_do_config(argc, argv, &config);

  distrend_listen(&listenset, config);

  /* This is called the ``main loop'' */

  while(cont)

    {

      struct distren_action *action;

      distrend_accept(&action);

      cont = distrend_do(action);

      distrend_action_free(action);

    }

  distrend_unlisten(listenset);

  distrend_config_free(config);

  return 0;

}

struct distrend_config

{

  cfg_t *mycfg;

  struct options_common *options;

  struct distrend_listen **listens; /*< Null terminated array of structs */

}

int distrend_do_config(int argc, char *argv[], struct distrend_config *config)

{

  cfg_opt_t myopts =

    {

      CFG_SEC("listen",  /* this must be imported into struct listens (which must still be declared) */

    {

      CFG_SIMPLE_STR("type", NULL),

	CFG_SIMPLE_STR("path", NULL),

	CFG_SIMPLE_INT("port", NULL)

	},

	      CFGF_MULTI),

      CFG_END

    };

  config = malloc(sizeof(struct distrend_config));

  options_init(argc, argv, &config->mycfg, &myopts, "server", &config->options);

  return 0;

}

int distrend_config_free(struct distrend_config *config)

{

  options_free(config->options);

  free(config);

  return 0;

}

// Registration on server. Needs attention. (e.g., people could make tons of accounts with the key we give them...

// Set up distrend -c username email@example.com

// We must prevent multi-user-creation abuse, too.

void registeruser(char *username, char *email){

  // Logs into sandboxed user on zserver2 and registers a user. Should eventually generate a key on the server and return it to the user.

  // All created user accounts should be sandboxed accordingly, requiring a different skel, and the default shell to be rbash. They also

  // need a custom path, which can be defined in the .bash_profile of the skel. All activity of server-side configuration should be documented

  // to ease the creation of new distren servers, or it should be automated and made much more all-inclusive, not requiring much config.

  char buf[10];

  struct execio *testrem;

  char *execargv[] =

    {

  "ssh",

  "distren_setup@protofusion.org",

  "-i",

  "setup.rsa", // We gotta figure out how we're going to do the whole keys thing... maybe grab this key via http? But have a secret password compiled in distren to prevent fraud?

  "-p",

  "23",

  "sudo /usr/sbin/useradd",

  "-M",

  "-c",

  email,

  "-d",

  "/home/distren",

  "--gid",

  "541",

  username,

  (char *)NULL

  };

  size_t readlen;

  fprintf(stderr, "Opening stream:\n", execio_open(&testrem, "ssh", execargv));

  buf[9] = '\0'; // null-terminating the array...

  while(!execio_read(testrem, buf, 9, &readlen)) // What's with the readlen stuff?

    {

      if(readlen > 9) {

	fprintf(stderr, "!!!! Something is terribly wrong!\n");

      }

      if(buf == 0) {

	fprintf(stderr, "**** Operation successful, or so we hope. We got no output. Just kidding. You will never see this. Something else should catch this though! And registration should really have some sort of password.");

      }

    buf[readlen] = '\0'; // Null-terminating the end of it again based on how large the data is?

    fprintf(stderr, "read \"%s\"\n", buf);

    }

  execio_close(testrem);

}

void loginuser(char *username, int secret){

  // Logs into sandboxed user on zserver2 and registers a user

  char buf[10];

  struct execio *testrem;

  char *execargv[] =

    {

  "ssh",

  "distren_setup@protofusion.org",

  "-i",

  "setup.rsa", // We gotta figure out how we're going to do the whole keys thing... maybe grab this key via http? But have a secret password compiled in distren to prevent fraud?

  "-p",