/*

 configuration for _this_ server

*/

{

  render_types = {"povray", "blender", "inkscape", "imagemagick", "dcraw"}

}

include("distrencommon.conf")

listen {

       type = "unix"

       path = "/var/run/distrend.sock"

       port = "0770"

}

/*

  internally defined funcs's prototypes @TODO: Make all functions nice and proper */

void distrenjob_remove(struct distrenjob *head, struct distrenjob *bj);

struct distrenjob *distrenjob_get(struct distrenjob *head, jobnum_t jobnum);

void distrenjob_enqueue(struct distrenjob *head, struct distrenjob *job);

void mortition(struct distrenjob *head, struct distrenjob *job);

int makeJobDataXML(struct distrenjob *job);

int updateJobListXML(struct distrenjob *head);

int createQueueFromXML(struct distrenjob *head);

int reCreateQueueFromXML(struct distrenjob *head, xmlDocPtr doc, xmlNodePtr current);

/* Global Vars, eliminate these */

jobnum_t jobnum = 0; // The next job number to create in the queue

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

/* ********************** Functions ************************* */

/** Dumps all data in RAM to an xml file (such as current jobs, etc) which is parsed by start_data. Remember to invoke this before shutting down! */

int xml_dump()

{

}

/**

   This is probably just a placeholder for remotio

*/

void remotio_send_to_client()

{

	// I am futile!

}

/** Fill variables after crash / shutdown from XML dumps */

int start_data(struct distrenjob *head)

{

  struct stat buffer;

    fprintf(stderr,"Parsing XML files and restoring previous state...\n");

    createQueueFromXML(head);

    return 1;

  }

  else{

    general_info.total_finished_jobs = 0;

    general_info.total_frames_rendered = 0;

    fprintf(stderr,"Couldn't find XML dump, starting up fresh.\n");

    return 2;

  }

}

/** Finish-Setter: Sets a frame to the "completed" status.*/

void finish_frame(struct distrenjob *head, struct distrenjob *distrenjob, int frame)

{

  distrenjob->frameset[frame].status = FRAMESETSTATUS_DONE;

  distrenjob->total_render_time = distrenjob->total_render_time + (clock() - distrenjob[jobnum].frameset[frame].start_time);

  distrenjob->completed_frames++;

  distrenjob->assigned_frames--;

  general_info.total_frames_rendered++; // Increase total frames var for stats

  if(distrenjob->completed_frames == distrenjob->total_frames)

    {

      mortition(head, distrenjob);

    }

}

/** "mortition" check to see if a job is actually done by scanning the folder of the job to make sure all frames are present*/

void mortition(struct distrenjob *head, struct distrenjob *job)

{

  short int isJobDone;

  int counter;

  char *path_and_number;

  struct stat buffer;

  isJobDone = 1; // set isJobDone to true

  for(counter = 0; counter < job->total_frames; counter++)

    {

      _distren_asprintf(&path_and_number, "stor/job%d/out/%d.%s", job->jobnum, job->frameset[counter].num, job->output_format);

      if(stat(path_and_number, &buffer) == -1)

        {

          job->frameset[counter].status = FRAMESETSTATUS_UNASSIGNED;

          job->completed_frames--;

          isJobDone = 0; // if a missing frame is found, set isJobDone to false

        }

    }

  if(isJobDone) // if all frames were accounted for

    {

      distrenjob_remove(head, job);

      distrenjob_free(&job);

      general_info.jobs_in_queue--;

      updateJobListXML(head);

    }

  else{

    job->prev_frame_index = 0; // if the job isn't done, have frame_finder() start from the first frame, allowing it to see the frames that are now unassigned

  }

}

/** scans the frames of a job to initialize a job after server */

/* returns 1 if the job is completely done and there are no missing frames */

/* returns 0 if a missing frame is found */

int restoreJobState(struct distrenjob *job)

{

  short int isJobDone;

  int counter;

  char *path_and_number;

  struct stat buffer;

        {

          job->frameset[counter].status = FRAMESETSTATUS_ASSIGNED;

          job->completed_frames++;

        }

      else

        isJobDone = 0;

    }

  return isJobDone;

}

/** creates a structure from starting data, then calls another function to actually add that struct to the queue */

{

  int counter2;

  int counter;

  struct distrenjob *distrenjob;

  distrenjob->type = 1;

  distrenjob->name = name;

  distrenjob->submitter = submitter;

  distrenjob->email = email;

  distrenjob->priority = priority;

  distrenjob->width = width;

  distrenjob->height = height;

  /* prepares all the frames by setting that status to "unassigned" */

  counter2 = start_frame;

  for(counter = 0; counter <= (end_frame- start_frame + 1); counter++){

    distrenjob->frameset[counter].num = counter2;

    distrenjob->frameset[counter].status = FRAMESETSTATUS_UNASSIGNED;

    counter2++;

  }

  /* add job to queue */

  makeJobDataXML(distrenjob);

  distrenjob_enqueue(head, distrenjob);

  general_info.jobs_in_queue++;

}

/** distrenjob_enqueue: This function adds the job to the queue based on its priority */

void distrenjob_enqueue(struct distrenjob *head, struct distrenjob *job) {

  struct distrenjob *prev_job = head; // create pointer to previous job

  struct distrenjob *current_job;     // create pointer to current_job (which job is being compared to)

  // iterate through linked list of jobs

  for(current_job = head; current_job != NULL; current_job = current_job->next){

    if(current_job == NULL){ // if it has reached the end of the list, add job there

      current_job = job;

  *job = distrenjob_ptr;

  *frame = &distrenjob_ptr->frameset[frame_counter];

  return 0;

}

/** Checks for dead, latent, or stale slaves */

void frame_watchdog(struct distrenjob *distrenjob_head)

{

  struct distrenjob *distrenjob_ptr;

  unsigned int counter;

  /* iterate through jobs */

    /* if the job has been started, checks by seeing if either to first or second frame has been started */

    if(distrenjob_ptr->frameset[0].status != FRAMESETSTATUS_UNASSIGNED || distrenjob_ptr->frameset[1].status != FRAMESETSTATUS_UNASSIGNED)

      for(counter = 0; counter < distrenjob_ptr->total_frames; counter ++)

        if((distrenjob_ptr->frameset[counter].start_time + distrenjob_ptr->watchdog_forgiveness) < clock())

        /*

        If frame is not completed within the number of seconds specified by watchdog_forgiveness

        Then change the frame status to unassigned

        */

          distrenjob_ptr->frameset[counter].status = FRAMESETSTATUS_UNASSIGNED;

}

/**

   Finds a distrenjob struct based on the jobnum

   @arg jobnum job number to search for

   @return NULL on job doesn't exist

   */

  tmp = xml2distrenjob(&distrenjob, "distrenjob.xml.example");

  if(tmp)

    fprintf(stderr, "xml2distrenjob() returned %d. Try to cd to distren/doc if you want to test out the xml2distrenjob() function. (This will only fix this error if the error is due to an inability of the xml library to access distrenjob.xml.example)\n\n", tmp);

  else

    fprintf(stderr, "using email ``%s'' for user ``%s'' -- reading in XML files and pulling data from them using libxml2+XPath works!!!\n", distrenjob->email, distrenjob->submitter);

  fprintf(stderr, "%s:%d running config\n", __FILE__, __LINE__);

  *config = malloc(sizeof(struct distrend_config));

  myopts[1].simple_value = &(*config)->datadir;

  fprintf(stderr, "using %s as datadir\n", (*config)->datadir);

  xmlcleanup();

  return 0;

}

int distrend_config_free(struct distrend_config *config)

{

  options_free(config->options);

  free(config);

  return 0;

}

/* ************************** XML Functions ************************* */

// returns 1 on successful completion of xml file

// creates the xml file that slaves read from, and is used to restart distren

int makeJobDataXML(struct distrenjob *job)

{

  xmlTextWriterPtr writer;

  char *tmp; // temporarily holds strings to be given to the xml writer

  _distren_asprintf(&tmp, "stor/job%d/job_info.xml", job->jobnum);

  // create xml document at the location tmp with no compression

  writer = xmlNewTextWriterFilename(tmp, 0);

  xmlTextWriterWriteAttribute(writer, (xmlChar*)"name", (xmlChar*)job->name);

  xmlTextWriterWriteAttribute(writer, (xmlChar*)"submitter", (xmlChar*)job->submitter);

  _distren_asprintf(&tmp, "%d", job->priority);

  xmlTextWriterWriteAttribute(writer, (xmlChar*)"priority", (xmlChar*)tmp);

  // write resolution element and add its attributes

  xmlTextWriterStartElement(writer, (xmlChar*)"resolution");

  _distren_asprintf(&tmp, "%d", job->width);

  xmlTextWriterWriteAttribute(writer, (xmlChar*)"width", (xmlChar*)tmp);

  _distren_asprintf(&tmp, "%d", job->height);

  xmlTextWriterWriteAttribute(writer, (xmlChar*)"height", (xmlChar*)tmp);

  xmlTextWriterEndElement(writer);

  // end document

  xmlTextWriterEndDocument(writer);

  // free writer and save xml file to disk

  xmlFreeTextWriter(writer);

  return 1;

}

// extracts data from the xml created by above function and creates a job from it

// it returns a pointer to the created job

struct distrenjob *createJobFromXML(int job_number)

{

  xmlDocPtr doc;

  xmlNodePtr cur;

  char *file_name;

  struct distrenjob *distrenjob;

  distrenjob_new(&distrenjob);

  _distren_asprintf(&file_name, "stor/job%d/job_info.xml", job_number);

  doc = xmlParseFile(file_name);

  cur = xmlDocGetRootElement(doc);

  distrenjob->name = (char*)xmlGetProp(cur, (xmlChar*)"name");

  distrenjob->submitter = (char*)xmlGetProp(cur, (xmlChar*)"submitter");

  distrenjob->priority = atoi((char*)xmlGetProp(cur, (xmlChar*)"priority"));

  cur = cur->xmlChildrenNode;

  distrenjob->width = atoi((char*)xmlGetProp(cur, (xmlChar*)"width"));

  distrenjob->height = atoi((char*)xmlGetProp(cur, (xmlChar*)"number"));

  restoreJobState(distrenjob);

  return distrenjob;

}

// returns 1 if successful

// updates job_list.xml which lists all the jobs in the queue

int updateJobListXML(struct distrenjob *head)

{

  struct distrenjob *job;

  xmlTextWriterPtr writer;

  char *tmp;

  char *tmp2;