add new class to interface with postgres database in an experiment to

simplify things by using a db to survive a crash/reboot.  So far (with
next checkin) manages to update a db.  Next need to do queries instead
of searches through in-memory data.

xwords4/relay/Makefile

@@ -18,17 +18,19 @@
 
 CXX = g++
 CC=$(CXX)
-SRC = xwrelay.cpp \
+SRC = \
+	configs.cpp \
 	cref.cpp \
+	crefmgr.cpp \
 	ctrl.cpp \
+	dbmgr.cpp \
 	http.cpp \
-	tpool.cpp \
+	lstnrmgr.cpp \
+	permid.cpp \
 	states.cpp \
 	timermgr.cpp \
-	configs.cpp \
+	tpool.cpp \
-	crefmgr.cpp \
+	xwrelay.cpp \
-	permid.cpp \
-	lstnrmgr.cpp \
 
 # STATIC ?= -static
 GITINFO = gitversion.txt
@@ -36,8 +38,11 @@ HASH=$(shell git describe)
 
 OBJ = $(patsubst %.cpp,%.o,$(SRC))
 #LDFLAGS += -pthread -g -lmcheck $(STATIC)
-LDFLAGS += -pthread -g $(STATIC)
+LDFLAGS += -pthread -g $(STATIC) \
+	-L$(shell pg_config --libdir) -lpq
+
 CPPFLAGS += -DSPAWN_SELF -DDO_HTTP -g -Wall \
+	-I $(shell pg_config --includedir) \
 	-DSVN_REV=\"$(shell cat $(GITINFO) 2>/dev/null || echo -n $(HASH) )\"
 
 # turn on semaphore debugging

xwords4/relay/dbmgr.cpp

@@ -0,0 +1,81 @@
+/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
+
+/* 
+ * Copyright 2010 by Eric House (xwords@eehouse.org).  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include <assert.h>
+
+#include "dbmgr.h"
+#include "xwrelay_priv.h"
+
+#define DB_NAME "xwgames"
+
+DBMgr::DBMgr()
+{
+    logf( XW_LOGINFO, "%s called", __func__ );
+    m_pgconn = PQconnectdb( "dbname = " DB_NAME );
+    logf( XW_LOGINFO, "%s:, m_pgconn: %p", __func__, m_pgconn );        
+
+    ConnStatusType status = PQstatus( m_pgconn );
+    assert( status == CONNECTION_OK );
+}
+ 
+DBMgr::~DBMgr()
+{
+    logf( XW_LOGINFO, "%s called", __func__ );
+    PQfinish( m_pgconn );
+}
+
+void
+DBMgr::AddNew( const char* cookie, const char* connName, CookieID cid, 
+               int langCode, int nPlayersT, int nPlayersH )
+{         
+
+#if 1
+    if ( !cookie ) cookie = "";
+    if ( !connName ) connName = "";
+
+    const char* fmt = "INSERT INTO games (cookie, connName, nTotal, nHere, lang) "
+        "VALUES( '%s', '%s', %d, %d, %d )";
+    char buf[256];
+    snprintf( buf, sizeof(buf), fmt, cookie, connName, nPlayersT, nPlayersH, langCode );
+    logf( XW_LOGINFO, "passing %s", buf );
+    PGresult* result = PQexec( m_pgconn, buf );
+#else
+    const char* command = "INSERT INTO games (cookie, connName, ntotal, nhere, lang) "
+        "VALUES( $1, $2, $3, $4, $5 )";
+    char nPlayersHBuf[4];
+    char nPlayersTBuf[4];
+    char langBuf[4];
+
+    snprintf( nPlayersHBuf, sizeof(nPlayersHBuf), "%d", nPlayersH );
+    snprintf( nPlayersTBuf, sizeof(nPlayersTBuf), "%d", nPlayersT );
+    snprintf( langBuf, sizeof(langBuf), "%d", langCode );
+
+    const char * const paramValues[] = { cookie, connName, nPlayersTBuf, nPlayersHBuf, langBuf };
+
+    PGresult* result = PQexecParams( m_pgconn, command,
+                                     sizeof(paramValues)/sizeof(paramValues[0]),
+                                     NULL, /*const Oid *paramTypes,*/
+                                     paramValues,
+                                     NULL, /*const int *paramLengths,*/
+                                     NULL, /*const int *paramFormats,*/
+                                     0 /*int resultFormat*/ );
+#endif
+    logf( XW_LOGINFO, "PQexecParams=>%d", result );
+}

xwords4/relay/dbmgr.h

@@ -0,0 +1,40 @@
+/* -*-mode: C; fill-column: 78; c-basic-offset: 4; -*- */
+
+/* 
+ * Copyright 2010 by Eric House (xwords@eehouse.org).  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef _DBMGR_H_
+#define _DBMGR_H_
+
+#include "xwrelay.h"
+#include <libpq-fe.h>
+
+class DBMgr {
+ public:
+    DBMgr();
+    ~DBMgr();
+
+    void AddNew( const char* cookie, const char* connName, CookieID cid, 
+                 int langCode, int nPlayersT, int nPlayersH );
+
+ private:
+    PGconn* m_pgconn;
+}; /* DBMgr */
+
+
+#endif