* <many>: refactor command parsing / checking a bit

src/mu-cmd.c

@@ -0,0 +1,114 @@
+/*
+** Copyright (C) 2010 Dirk-Jan C. Binnema <djcb@djcbsoftware.nl>
+**
+** 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 3, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+**
+*/
+
+#include <string.h>
+#include "mu-cmd.h"
+
+MuCmd 
+mu_cmd_from_string (const char* cmd)
+{
+	if (!cmd)
+		return MU_CMD_UNKNOWN;
+
+	if (strcmp (cmd, "index") == 0)
+		return MU_CMD_INDEX;
+
+	/* support some synonyms... */
+	if ((strcmp (cmd, "query") == 0) ||
+	    (strcmp (cmd, "find")  == 0) ||
+	    (strcmp (cmd, "search") == 0))
+		return MU_CMD_QUERY;
+
+	if ((strcmp (cmd, "mkmdir") == 0) ||
+	    (strcmp (cmd, "mkdir") == 0)) 
+		return MU_CMD_MKDIR;
+
+	if (strcmp (cmd, "link") == 0)
+		return MU_CMD_LINK;
+	
+	if ((strcmp (cmd, "help") == 0) ||
+	    (strcmp (cmd, "info") == 0))
+		return MU_CMD_HELP;
+	
+	return MU_CMD_UNKNOWN;
+}
+
+
+
+static gboolean
+_check_query_params (MuConfigOptions *opts)
+{
+	if (opts->linksdir) 
+		if (opts->fields || opts->sortfield || opts->xquery) {
+			g_warning ("Invalid option for '--linksdir'");
+			return FALSE;
+		}
+	
+	if (opts->xquery) 
+		if (opts->fields || opts->sortfield) {
+			g_warning ("Invalid option for '--xquery'");
+			return FALSE;
+		}
+	
+	if (opts->ascending && opts->descending) {
+		g_warning ("Cannot specify both '--ascending'"
+			   " and '--descending'");
+		return FALSE;
+	}
+	
+	if (!opts->params[0] || !opts->params[1]) {
+		g_warning ("Missing search expression");
+		return FALSE;
+	}
+	
+	return TRUE;
+}
+
+
+static gboolean
+_check_index_params (MuConfigOptions *opts)
+{
+	if (opts->linksdir) 
+		if (opts->linksdir  || opts->fields ||
+		    opts->sortfield || opts->xquery ||
+		    opts->ascending || opts->descending||
+		    opts->xquery) {
+			g_warning ("Invalid option(s) for command");
+			return FALSE;
+		}
+	
+	return TRUE;
+}
+	
+
+
+gboolean
+mu_cmd_check_parameters (MuCmd cmd, MuConfigOptions *opts)
+{
+	g_return_val_if_fail (cmd > 0 && cmd < MU_CMD_UNKNOWN,
+			  FALSE);
+	switch (cmd) {
+	case MU_CMD_INDEX:
+		return _check_index_params (opts);
+	case MU_CMD_QUERY:
+		return _check_query_params (opts);
+	default:
+		return TRUE;
+	}
+}