Start SQLite db module

I plan to save all messages in an SQLite db.
For retrieving information it's nicer than having it in a text file.
We will have more info in there and easier to parse it.

This will also be good for later MAM
(#660).

Regular text files will still be an option for users so that they can
easily grep them and do whatever they like.

Internally Profanity will only use the SQLite db.

Makefile.am

@@ -1,5 +1,7 @@
 core_sources = \
-	src/xmpp/contact.c src/xmpp/contact.h src/log.c src/common.c \
+	src/xmpp/contact.c src/xmpp/contact.h \
+	src/log.c src/common.c \
+	src/database.h src/database.c \
 	src/log.h src/profanity.c src/common.h \
 	src/profanity.h src/xmpp/chat_session.c \
 	src/xmpp/chat_session.h src/xmpp/muc.c src/xmpp/muc.h src/xmpp/jid.h src/xmpp/jid.c \

configure.ac

@@ -179,6 +179,9 @@ PKG_CHECK_MODULES([curl], [libcurl], [],
     [AC_CHECK_LIB([curl], [main], [],
         [AC_MSG_ERROR([libcurl is required for profanity])])])
 
+PKG_CHECK_MODULES([SQLITE], [sqlite3 >= 3.30.0], [],
+    [AC_MSG_ERROR([sqlite3 3.30.0 or higher is required for profanity profanity])])
+
 AS_IF([test "x$enable_icons_and_clipboard" != xno],
     [PKG_CHECK_MODULES([GTK], [gtk+-2.0 >= 2.24.10],
         [AC_DEFINE([HAVE_GTK], [1], [libgtk module])],
@@ -332,9 +335,9 @@ AS_IF([test "x$PACKAGE_STATUS" = xdevelopment],
 AS_IF([test "x$PLATFORM" = xosx],
     [AM_CFLAGS="$AM_CFLAGS -Qunused-arguments"])
 AM_LDFLAGS="$AM_LDFLAGS -export-dynamic"
-AM_CPPFLAGS="$AM_CPPFLAGS $glib_CFLAGS $gio_CFLAGS $curl_CFLAGS $libnotify_CFLAGS $PYTHON_CPPFLAGS ${GTK_CFLAGS}"
+AM_CPPFLAGS="$AM_CPPFLAGS $glib_CFLAGS $gio_CFLAGS $curl_CFLAGS $libnotify_CFLAGS $PYTHON_CPPFLAGS ${GTK_CFLAGS} ${SQLITE_CFLAGS}"
 AM_CPPFLAGS="$AM_CPPFLAGS -DTHEMES_PATH=\"\\\"$THEMES_PATH\\\"\" -DICONS_PATH=\"\\\"$ICONS_PATH\\\"\""
-LIBS="$glib_LIBS $gio_LIBS $curl_LIBS $libnotify_LIBS $PYTHON_LIBS $PYTHON_EXTRA_LIBS $PYTHON_LDFLAGS ${GTK_LIBS} $LIBS"
+LIBS="$glib_LIBS $gio_LIBS $curl_LIBS $libnotify_LIBS $PYTHON_LIBS $PYTHON_EXTRA_LIBS $PYTHON_LDFLAGS ${GTK_LIBS} ${SQLITE_LIBS} $LIBS"
 
 AC_SUBST(AM_LDFLAGS)
 AC_SUBST(AM_CFLAGS)

src/database.c

@@ -0,0 +1,70 @@
+/*
+ * database.c
+ * vim: expandtab:ts=4:sts=4:sw=4
+ *
+ * Copyright (C) 2020 Michael Vetter <[email protected]>
+ *
+ * This file is part of Profanity.
+ *
+ * Profanity 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Profanity 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 Profanity.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link the code of portions of this program with the OpenSSL library under
+ * certain conditions as described in each individual source file, and
+ * distribute linked combinations including the two.
+ *
+ * You must obey the GNU General Public License in all respects for all of the
+ * code used other than OpenSSL. If you modify file(s) with this exception, you
+ * may extend this exception to your version of the file(s), but you are not
+ * obligated to do so. If you do not wish to do so, delete this exception
+ * statement from your version. If you delete this exception statement from all
+ * source files in the program, then also delete it here.
+ *
+ */
+
+#include <sqlite3.h>
+
+#include "log.h"
+
+static sqlite3 *g_log_database;
+
+bool
+log_database_init(void)
+{
+    int ret = sqlite3_initialize();
+    char *filename = "test";
+
+	if (ret != SQLITE_OK) {
+        log_error("Error initializing SQLite database: %d", ret);
+        return FALSE;
+	}
+
+    ret = sqlite3_open(filename, &g_log_database);
+    if (ret != SQLITE_OK) {
+        const char *err_msg = sqlite3_errmsg(g_log_database);
+        log_error("Error opening SQLite database: %s", err_msg);
+        return FALSE;
+    }
+
+    log_error("Initialized SQLite database: %s", filename);
+    return TRUE;
+}
+
+void
+log_database_close(void)
+{
+	sqlite3_close(g_log_database);
+	sqlite3_shutdown();
+}
+

src/database.h

@@ -0,0 +1,43 @@
+/*
+ * database.h
+ * vim: expandtab:ts=4:sts=4:sw=4
+ *
+ * Copyright (C) 2020 Michael Vetter <[email protected]>
+ *
+ * This file is part of Profanity.
+ *
+ * Profanity 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Profanity 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 Profanity.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * In addition, as a special exception, the copyright holders give permission to
+ * link the code of portions of this program with the OpenSSL library under
+ * certain conditions as described in each individual source file, and
+ * distribute linked combinations including the two.
+ *
+ * You must obey the GNU General Public License in all respects for all of the
+ * code used other than OpenSSL. If you modify file(s) with this exception, you
+ * may extend this exception to your version of the file(s), but you are not
+ * obligated to do so. If you do not wish to do so, delete this exception
+ * statement from your version. If you delete this exception statement from all
+ * source files in the program, then also delete it here.
+ *
+ */
+
+#ifndef DATABASE_H
+#define DATABASE_H
+
+bool log_database_init(void);
+void log_database_close(void);
+
+#endif // DATABASE_H
+

src/profanity.c

@@ -53,6 +53,7 @@
 #include "profanity.h"
 #include "common.h"
 #include "log.h"
+#include "database.h"
 #include "config/files.h"
 #include "config/tlscerts.h"
 #include "config/accounts.h"
@@ -184,6 +185,7 @@ _init(char *log_level, char *config_file, char *log_file)
     } else {
         log_info("Starting Profanity (%s)...", PACKAGE_VERSION);
     }
+    log_database_init();
     chat_log_init();
     groupchat_log_init();
     accounts_load();
@@ -246,6 +248,7 @@ _shutdown(void)
 #ifdef HAVE_OMEMO
     omemo_close();
 #endif
+    log_database_close();
     chat_log_close();
     theme_close();
     accounts_close();