do finding of open games using database rather than cref list, which

requires updating the number of players when new devices join.  Drop
requirement that cid be unique.

xwords4/relay/cref.cpp

@@ -833,6 +833,8 @@ CookieRef::increasePlayerCounts( const CRefEvent* evt, bool reconn )
         assert( m_nPlayersHere <= m_nPlayersSought );
         addHost = true;
 
+        DBMgr::Get()->AddPlayers( ConnName(), nPlayersH );
+
         /* if ( m_nPlayersHere == m_nPlayersSought ) { /\* complete! *\/ */
         /*     newEvt = XWE_ALLHERE; */
         /* } else { */

xwords4/relay/crefmgr.cpp

@@ -64,7 +64,7 @@ CRefMgr::CRefMgr()
     pthread_mutex_init( &m_roomsFilledMutex, NULL );
     pthread_mutex_init( &m_freeList_mutex, NULL );
     pthread_rwlock_init( &m_cookieMapRWLock, NULL );
-    m_db = new DBMgr();
+    m_db = DBMgr::Get();
 }
 
 CRefMgr::~CRefMgr()
@@ -134,6 +134,14 @@ CRefMgr::FindOpenGameFor( const char* cookie, const char* connName,
                           HostID hid, int socket, int nPlayersH, int nPlayersT,
                           int gameSeed, int langCode, bool* alreadyHere )
 {
+#if 1
+    CookieRef* found = NULL;
+    CookieID cid = m_db->FindOpen( cookie, langCode, nPlayersT, nPlayersH );
+    if ( cid > 0 ) {
+        found = getCookieRef_impl( cid );
+    }
+    return found;
+#else
     logf( XW_LOGINFO, "%s(cookie=%s,connName=%s,hid=%d,seed=%x,socket=%d,"
           "here=%d,total=%d)", __func__, cookie, connName, hid, gameSeed, 
           socket, nPlayersH, nPlayersT );
@@ -200,6 +208,7 @@ CRefMgr::FindOpenGameFor( const char* cookie, const char* connName,
 
     logf( XW_LOGINFO, "%s=>%p", __func__, found );
     return found;
+#endif
 } /* FindOpenGameFor */
 
 CookieID

xwords4/relay/crefmgr.h

@@ -78,10 +78,12 @@ class CRefMgr {
        it.
      */
 
+ private:
+    CRefMgr();
+
  public:
     static CRefMgr* Get();
 
-    CRefMgr();
     ~CRefMgr();
 
     void CloseAll();

xwords4/relay/dbmgr.cpp

@@ -26,6 +26,17 @@
 
 #define DB_NAME "xwgames"
 
+static DBMgr* s_instance = NULL;
+
+/* static */ DBMgr*
+DBMgr::Get() 
+{
+    if ( s_instance == NULL ) {
+        s_instance = new DBMgr();
+    }
+    return s_instance;
+} /* Get */
+
 DBMgr::DBMgr()
 {
     logf( XW_LOGINFO, "%s called", __func__ );
@@ -37,15 +48,16 @@ DBMgr::DBMgr()
 
     /* Now figure out what the largest cid currently is.  There must be a way
        to get postgres to do this for me.... */
-    const char* query = "SELECT cid FROM games ORDER BY - cid LIMIT 1";
-    PGresult* result = PQexec( m_pgconn, query );
-    if ( 0 == PQntuples( result ) ) {
-        m_nextCID = 1;
-    } else {
-        char* value = PQgetvalue( result, 0, 0 );
-        m_nextCID = 1 + atoi( value );
-    }
-    logf( XW_LOGINFO, "%s: m_nextCID=%d", __func__, m_nextCID );
+    /* const char* query = "SELECT cid FROM games ORDER BY - cid LIMIT 1"; */
+    /* PGresult* result = PQexec( m_pgconn, query ); */
+    /* if ( 0 == PQntuples( result ) ) { */
+    /*     m_nextCID = 1; */
+    /* } else { */
+    /*     char* value = PQgetvalue( result, 0, 0 ); */
+    /*     m_nextCID = 1 + atoi( value ); */
+    /* } */
+    /* PQclear(result); */
+    /* logf( XW_LOGINFO, "%s: m_nextCID=%d", __func__, m_nextCID ); */
 }
  
 DBMgr::~DBMgr()
@@ -67,10 +79,11 @@ DBMgr::AddNew( const char* cookie, const char* connName, CookieID cid,
         "(cid, cookie, connName, nTotal, nHere, lang) "
         "VALUES( %d, '%s', '%s', %d, %d, %d )";
     char buf[256];
-    snprintf( buf, sizeof(buf), fmt, m_nextCID++, cookie, connName, 
+    snprintf( buf, sizeof(buf), fmt, cid/*m_nextCID++*/, cookie, connName, 
               nPlayersT, nPlayersH, langCode );
     logf( XW_LOGINFO, "passing %s", buf );
     PGresult* result = PQexec( m_pgconn, buf );
+    PQclear( result );
 #else
     const char* command = "INSERT INTO games (cookie, connName, ntotal, nhere, lang) "
         "VALUES( $1, $2, $3, $4, $5 )";
@@ -95,19 +108,55 @@ DBMgr::AddNew( const char* cookie, const char* connName, CookieID cid,
     logf( XW_LOGINFO, "PQexecParams=>%d", result );
 }
 
+CookieID
+DBMgr::FindOpen( const char* cookie, int lang, int nPlayersT, int nPlayersH )
+{
+    CookieID cid = 0;
+
+    const char* fmt = "SELECT cid from games where cookie = '%s' "
+        "AND lang = %d "
+        "AND nTotal = %d "
+        "AND %d <= nTotal-nHere "
+        "LIMIT 1";
+    char query[256];
+    snprintf( query, sizeof(query), fmt,
+              cookie, lang, nPlayersT, nPlayersH );
+    logf( XW_LOGINFO, "query: %s", query );
+
+    PGresult* result = PQexec( m_pgconn, query );
+    if ( 1 == PQntuples( result ) ) {
+        cid = atoi( PQgetvalue( result, 0, 0 ) );
+        assert( cid > 0 );
+    }
+    PQclear( result );
+    logf( XW_LOGINFO, "%s=>%d", __func__, cid );
+    return cid;
+}
+
+void
+DBMgr::AddPlayers( const char* connName, int nToAdd )
+{
+    const char* fmt = "UPDATE games SET nHere = nHere+%d "
+        "WHERE connName = '%s'";
+    char query[256];
+    snprintf( query, sizeof(query), fmt, nToAdd, connName );
+    logf( XW_LOGINFO, "%s: query: %s", __func__, query );
+
+    PGresult* result = PQexec( m_pgconn, query );
+    PQclear( result );
+}
 
 /*
   Schema:
   CREATE TABLE games ( 
-  cid integer PRIMARY KEY,
+  cid integer,
   cookie VARCHAR(32),
-  connName VARCHAR(64) UNIQUE,
+  connName VARCHAR(64) UNIQUE PRIMARY KEY,
   nTotal INTEGER,
   nHere INTEGER, 
   lang INTEGER,
   ctime TIMESTAMP,
   mtime TIMESTAMP
 );
+        
  */
-
-

xwords4/relay/dbmgr.h

@@ -26,15 +26,22 @@
 
 class DBMgr {
  public:
-    DBMgr();
+    static DBMgr* Get();
+
     ~DBMgr();
 
     void AddNew( const char* cookie, const char* connName, CookieID cid, 
                  int langCode, int nPlayersT, int nPlayersH );
 
+    CookieID FindOpen( const char* cookie, int lang, int nPlayersT, 
+                       int nPlayersH );
+
+    void AddPlayers( const char* connName, int nToAdd );
+
  private:
+    DBMgr();
     PGconn* m_pgconn;
-    int m_nextCID;
+    //int m_nextCID;
 }; /* DBMgr */