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 /* A transactor that fetches the current tournament and some information about it. */
  34 class FetchCurrentTournament : public pqxx::transactor<> {
  35 private:
  36         int id;
  37         std::string name;
  38
  39 public:
  40         FetchCurrentTournament() {}
  41         void operator() (pqxx::transaction<> &t)
  42         {
  43                 pqxx::result res( t.exec("SELECT * FROM bigscreen.active_tournament NATURAL JOIN tournaments") );
  44                 try {
  45                         pqxx::result::tuple tournament = res.at(0);
  46
  47                         id = tournament["tournament"].as(id);
  48                         name = tournament["tournament"].as(name);
  49                 } catch (PGSTD::out_of_range &e) {
  50                         std::fprintf(stderr, "foof\n");
  51
  52                         id = -1;
  53                         name = "";
  54                 }
  55         }
  56
  57         int get_tournament_id() const
  58         {
  59                 return id;
  60         }
  61
  62         std::string get_tournament_name() const
  63         {
  64                 return name;
  65         }
  66 };
  67
  68 void init(pqxx::connection &conn)
  69 {
  70         FetchCurrentTournament fct;
  71         conn.perform(fct);
  72
  73         if (fct.get_tournament_id() == -1) {
  74                 std::fprintf(stderr, "No active tournament\n");
  75         } else {
  76                 std::fprintf(stderr, "Current tournament is %d (name: '%s')\n",
  77                         fct.get_tournament_id(), fct.get_tournament_name().c_str());
  78         }
  79 }
  80
  81 void main_loop(pqxx::connection &conn)
  82 {
  83         pqxx::work t(conn, "trx");
  84
  85         // fetch all songs
  86         pqxx::result res( t.exec("SELECT * FROM songs") );
  87         for (pqxx::result::const_iterator i = res.begin(); i != res.end(); ++i) {
  88                 // std::fprintf(stderr, "%s\n", i["title"].c_str());
  89         }
  90         t.commit();
  91
  92         sleep(1);
  93 }
  94
  95 int main(int argc, char **argv)
  96 {
  97         GLWindow glw("CCBS bigscreen", 800, 600, 32, false, 16, -1);
  98         try {
  99                 pqxx::connection conn("dbname=ccbs host=altersex.samfundet.no user=ccbs password=GeT|>>B_");
 100                 FlagTrigger tournament_changed(conn, "active_tournament");
 101
 102                 // when active_tournament is changed, we destroy everything and start from scratch
 103                 for ( ;; ) {
 104                         tournament_changed.reset_flag();
 105                         init(conn);
 106                         do {
 107                                 main_loop(conn);
 108                                 conn.get_notifs();
 109                         } while (!tournament_changed.get_flag());
 110                         std::fprintf(stderr, "active_tournament changed, resetting...\n");
 111                 }
 112         } catch (const std::exception &e) {
 113                 std::fprintf(stderr, "Exception: %s\n", e.what());
 114                 exit(1);
 115         }
 116
 117         return 0;
 118 }