public OnPlayerEnterCheckpoint(playerid)
{
   print("Someone entered a checkpoint, checking what one");
   if(PlayerCPInformation[playerid][MissionCheckPoint] == 1 && AccountInformation[playerid][CurrentlyWorking] > -1)
   {
      print("Someone entered a mission checkpoint");
      if(GetPlayerVehicleID(playerid) == AccountInformation[playerid][WorkingVehicleID])
      {
         print("The vehicle it was started in is valid");

         new job = AccountInformation[playerid][CurrentlyWorking];

         if(JobInformation[job][JobEndPoint] && !IsPlayerInRangeOfPoint(playerid, 20, JobInformation[job][F_START][0], JobInformation[job][F_START][1], JobInformation[job][F_START][2]))
         {
            new dist = JobInformation[job][JobDistance];
            AccountInformation[playerid][CurrentlyWorking] = -1;

            DisablePlayerCheckpoint(playerid);

            for(new j = 0; j < MAX_SERVER_JOBS; j ++)
            {
               if(JobInformation[j][JobLinked] == JobInformation[job][JobLinked]) dist += JobInformation[j][JobDistance];
            }

            new string[128];
            format(string,sizeof(string), "[WORK]: Congratulations you have successfully completed a mission, and you have travelled a total of '%d Metres'", dist);
            SendClientMessage(playerid, COLOR_WHITE, string);

         } else {

            print("No End point for this checkpoint, finding the next location");
            new njid =  NextMissionStep(playerid, AccountInformation[playerid][CurrentlyWorking]);

            if(njid > -1)
            {
               print("Found the next section, calculating the distance (if needed) and setting the next checkpoint.");
               if(!IsPlayerInRangeOfPoint(playerid, 20, JobInformation[job][F_START][0], JobInformation[job][F_START][1], JobInformation[job][F_START][2]))
               {
                  new dist =  Distance(JobInformation[job][F_START][0], JobInformation[job][F_START][1], JobInformation[job][F_START][2], JobInformation[job][F_END][0], JobInformation[job][F_END][1], JobInformation[job][F_END][2]);
                  AccountInformation[playerid][MissionTotalDistance] += dist;
               }
               
               DisablePlayerCheckpoint(playerid);
               SetPlayerCheckpoint(playerid, JobInformation[njid][F_START][0], JobInformation[njid][F_START][1],JobInformation[njid][F_START][2], 15);
               AccountInformation[playerid][CurrentlyWorking] = JobInformation[njid][JobID];              

            } else {
               SendClientMessage(playerid, COLOR_LIGHTRED, "There seems to be an issue with finding the next step in the job, that is either ('The End Point' or 'Next Checkpoint')");
               SendClientMessage(playerid, COLOR_LIME, "Your balance has been updated with the total amount of money for the distance you've flown so far!");
            }
         }
      } else {
         SendClientMessage(playerid, COLOR_LIGHTRED, "You must finish the mission in the vehicle you started it in");
      }     
   } else {
      SendClientMessage(playerid, COLOR_LIGHTRED, "You're not currently doing a mission");
   }
}

{
   MissionCheckPoint,
}
new PlayerCPInformation[MAX_PLAYERS][PlayerCPInfo];

enum JobInfo
{
   JobID,
   JobSlotUsed,
   JobLinked,
   JobDistance,
   JobStep,
   JobEndPoint,
   Float: F_START[3],
   Float: F_END[3],
};
new JobInformation[MAX_SERVER_JOBS][JobInfo];

    JobInformation[1][F_START][0] = 1.9260,
    JobInformation[1][F_START][1] = -41.4742,
    JobInformation[1][F_START][2] = 2.0921;

    JobInformation[1][F_END][0] = 310.0681,
    JobInformation[1][F_END][1] = 2029.8296,
    JobInformation[1][F_END][2] = 16.6159;

    JobInformation[1][JobID] = 1;
    JobInformation[1][JobLinked] = 1;
    JobInformation[1][JobStep] = 1;
    JobInformation[1][JobEndPoint] = 0;

    JobInformation[2][F_START][0] = 1.9260,
    JobInformation[2][F_START][1] = -41.4742,
    JobInformation[2][F_START][2] = 2.0921;

    JobInformation[2][F_END][0] = 310.0681,
    JobInformation[2][F_END][1] = 2029.8296,
    JobInformation[2][F_END][2] = 16.6159;

    JobInformation[2][JobID] = 2;
    JobInformation[2][JobLinked] = 1;
    JobInformation[2][JobStep] = 2;
    JobInformation[2][JobEndPoint] = 0;

    JobInformation[3][F_START][0] = 1.9260,
    JobInformation[3][F_START][1] = -41.4742,
    JobInformation[3][F_START][2] = 2.0921;

    JobInformation[3][F_END][0] = 310.0681,
    JobInformation[3][F_END][1] = 2029.8296,
    JobInformation[3][F_END][2] = 16.6159;

    JobInformation[3][JobID] = 3;
    JobInformation[3][JobLinked] = 1;
    JobInformation[3][JobStep] = 3;
    JobInformation[3][JobEndPoint] = 1;