(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

  // For secondary upload location...

  char url;

  char login_name;

  char login_pass;

} 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

} 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[])

{

// I'm assuming this is a non-working framework :)

	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)

		},

  "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",

  "echo",

  "hello",

  (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!");

      }

    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);

}

/*

 frame[frame] Assignments:

  "0" - cancelled

  "1" - unassigned

  "2" - assigned to slave

  "3" - completed by slave and uploaded

 Have a script crawl through each job in the arrays, ordered by priority?, and assign a certain number of frames to each slave.

 Then we will need some sort of watchdog to monitor slaves on the main server to check for stales.

*/

/* This function creates frame array based on the total number of frames to be rendered, which will then be parsed by function frame_farmer. */

void frame_num_struct_builder(int sframe, int eframe) {

	int jobnum_new = highest_jobnum + 1;

	int fcount = sframe; // Used to create all the frames in the structure from sframe to eframe

	int x = 0;

	blendjob[jobnum_new].total_frames = total; // sets the total number of frames in animation for status purposes

	while(x < total){

		blendjob[jobnum_new].frameset[x].frame_num = fcount;

		x++;

		fcount++;

	}

	highest_jobnum++;

}

// matches your computer up with a lovely frame to render

int frame_finder(){

	int your_frame = NULL;  // your_frame is an interger value that will be given to the client as the frame number to render

	int finder_jobnum = 0;

	short int done = 0;

	for(int priority = 10; priority >= 1; priority--){ // start the scan for the next job with the highest priority

		finder_jobnum = hcfjob + 1; // reset it to start scanning at first uncompleted job for the pass at each priority level

		while(finder_jobnum <= highest_jobnum){

			if(blendjob[finder_jobnum].priority = priority){  // looks for a job with the current priority value

				done = 1;									  // notice it starts by looking at the oldest job first

				break;

			}

			if(done = 1)  // If it has found a job with the current priority value, it will break out of the loop

				break;    // If none is found it goes to the next job to see if it is of the current priority value

			else

				finder_jobnum++;

		}

		if(done = 1) // if job has been found, it lets it out of the priority changer loop

			break;

	}

		if (blendjob[finder_jobnum].frameset[frameset_count].frame_status = 0)  // If frame that is not assigned has been found, frameset_count is not changed

			break;																// and frameset_count is used to give the frame number later in this funciton

		x++;  // If frame is assigned or done, it goes to next frame

	}

blendjob[jobnum].frameset[x].frame_status++; // sets the value of the frame to 2, which means its taken

your_frame = blendjob[jobnum].frameset[x].frame_num; //  Takes the frameset found in the while statement above, and extracts the frame number from it and assigns it to the int your_frame

if(your_frame = null)  // If that job had no open frames for some reason, run the status report generator so that

	status_report_generator();  //the job priority can be changed to 0

return your_frame; // your_frame is returned as the frame to be rendered

}

// This figures out how much of the job is done, where jobnum corresponds to the job number

// This uses pointers, so when it is run it updates certain values in memory

void status_report_generator(){

	int num1 = hcfjob+1; // to scan through jobs

	int num2 = 0;		 // to scan through frames

			}

		}

	}

// This function makes the value of the frame 2, which means its completed.

void the_finisher(int frame){

	blendjob[jobnum].frameset[frame]++;

}

// Queuer: this function should add files to the queue

// Type: 0 = blender, 1 = luxrender

// jobnum is the current job number

void queue(int type, char *name, char *submitter, char *email, int priority, int mode, int spp, *frameset) {

  if(type == 1){

    blendjob[jobnum].name = name;

    blendjob[jobnum].submitter = submitter;

    blendjob[jobnum].email = email;

    blendjob[jobnum].priority = priority;

    blendjob[jobnum].frameset =  frameset;

  }

  if(type == 2){

    luxjob[jobnum].name = name;

    luxjob[jobnum].submitter = submitter;

    luxjob[jobnum].email = email;

    luxjob[jobnum].priority = priority;

    luxjob[jobnum].mode = mode;

    luxjob[jobnum].spp = spp;

    luxjob[jobnum].frameset = frameset;

    // handle lux modes somehow.

}

  else{

    // Throw error.

  }

jobnum++;

}

/*

Slave execution code lies below

Slave listens on server for a command in the format of each function...

We need if's for returns... ==> watchdog