git.sesse.net Git - ccbs/blob - bigscreen/ccbs_bigscreen.cpp

   1 #include <cstdio>
   2 #include <unistd.h>
   3 #include <pqxx/pqxx>
   4 #include "glwindow.h"
   5
   6 /* A trigger that sets a flag whenever it's trigged. */
   7 class FlagTrigger : pqxx::trigger {
   8 private:
   9         bool flag;
  10
  11 public:
  12         FlagTrigger(pqxx::connection_base &conn, const PGSTD::string &name)
  13                 : pqxx::trigger(conn, name), flag(false) {}
  14         virtual ~FlagTrigger() throw () {}
  15
  16         virtual void operator() (int pid)
  17         {
  18                 flag = true;
  19                 std::fprintf(stderr, "Received a flag trigger from pid %u\n", pid);
  20         }
  21
  22         bool get_flag() const
  23         {
  24                 return flag;
  25         }
  26
  27         void reset_flag()
  28         {
  29                 flag = false;
  30         }
  31 };
  32
  33 class Tournament {
  34 public:
  35         int id;
  36         std::string name;
  37 };
  38
  39 /* A transactor that fetches the current tournament and some information about it. */
  40 class FetchCurrentTournament : public pqxx::transactor<> {
  41 private:
  42         Tournament *tourn;
  43
  44 public:
  45         FetchCurrentTournament(Tournament *tourn) : tourn(tourn) {}
  46         void operator() (pqxx::transaction<> &t)
  47         {
  48                 pqxx::result res( t.exec("SELECT * FROM bigscreen.active_tournament NATURAL JOIN tournaments") );
  49                 try {
  50                         pqxx::result::tuple tournament = res.at(0);
  51
  52                         tourn->id = tournament["tournament"].as(tourn->id);
  53                         tourn->name = tournament["tournamentname"].as(tourn->name);
  54                 } catch (PGSTD::out_of_range &e) {
  55                         tourn->id = -1;
  56                         tourn->name = "";
  57                 }
  58         }
  59 };
  60
  61 void init(pqxx::connection &conn)
  62 {
  63         Tournament tourn;
  64         conn.perform(FetchCurrentTournament(&tourn));
  65
  66         if (tourn.id == -1) {
  67                 std::fprintf(stderr, "No active tournament\n");
  68         } else {
  69                 std::fprintf(stderr, "Current tournament is %d (name: '%s')\n",
  70                         tourn.id, tourn.name.c_str());
  71         }
  72 }
  73
  74 void main_loop(pqxx::connection &conn)
  75 {
  76         pqxx::work t(conn, "trx");
  77
  78         // fetch all songs
  79         pqxx::result res( t.exec("SELECT * FROM songs") );
  80         for (pqxx::result::const_iterator i = res.begin(); i != res.end(); ++i) {
  81                 // std::fprintf(stderr, "%s\n", i["title"].c_str());
  82         }
  83         t.commit();
  84
  85         sleep(1);
  86 }
  87
  88 int main(int argc, char **argv)
  89 {
  90         GLWindow glw("CCBS bigscreen", 800, 600, 32, false, 16, -1);
  91         try {
  92                 pqxx::connection conn("dbname=ccbs host=altersex.samfundet.no user=ccbs password=GeT|>>B_");
  93                 FlagTrigger tournament_changed(conn, "active_tournament");
  94
  95                 // when active_tournament is changed, we destroy everything and start from scratch
  96                 for ( ;; ) {
  97                         tournament_changed.reset_flag();
  98                         init(conn);
  99                         do {
 100                                 main_loop(conn);
 101                                 conn.get_notifs();
 102                         } while (!tournament_changed.get_flag());
 103                         std::fprintf(stderr, "active_tournament changed, resetting...\n");
 104                 }
 105         } catch (const std::exception &e) {
 106                 std::fprintf(stderr, "Exception: %s\n", e.what());
 107                 exit(1);
 108         }
 109
 110         return 0;
 111 }