Add app_groupcount to manage groups

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2888 65c4cc65-6c06-0410-ace0-fbb531ad65f3

apps/Makefile

@@ -26,7 +26,8 @@ APPS=app_dial.so app_playback.so app_voicemail.so app_directory.so app_mp3.so\
      app_enumlookup.so app_transfer.so app_setcidnum.so app_cdr.so \
      app_hasnewvoicemail.so app_sayunixtime.so app_cut.so app_read.so \
      app_setcdruserfield.so app_random.so app_ices.so app_eval.so \
-     app_nbscat.so app_sendtext.so app_exec.so app_sms.so
+     app_nbscat.so app_sendtext.so app_exec.so app_sms.so \
+     app_groupcount.so
 
 ifneq (${OSARCH},Darwin)
 APPS+=app_intercom.so

apps/app_groupcount.c

@@ -0,0 +1,174 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Group Manipulation Applications
+ *
+ * Copyright (c) 2004 Digium
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/options.h>
+#include <asterisk/channel.h>
+#include <asterisk/pbx.h>
+#include <asterisk/module.h>
+
+static char *tdesc = "Group Management Routines";
+
+static char *app_group_count = "GetGroupCount";
+static char *app_group_set = "SetGroup";
+static char *app_group_check = "CheckGroup";
+
+static char *group_count_synopsis = "GetGroupCount([groupname])";
+static char *group_set_synopsis = "SetGroup([groupname])";
+static char *group_check_synopsis = "CheckGroup(max)";
+
+static char *group_count_descrip =
+"GetGroupCount([group])\n"
+"  Calculates the group count for the specified group, or uses\n"
+"the current channel's group if not specifed (and non-empty).\n"
+"Stores result in GROUPCOUNT.  Always returns 0.\n";
+
+static char *group_set_descrip =
+"SetGroup(group)\n"
+"  Sets the channel group to the specified value.  Equivalent to\n"
+"SetVar(GROUP=group).  Always returns 0.\n";
+
+static char *group_check_descrip =
+"CheckGroup(max)\n"
+"  Checks that the current number of total channels in the\n"
+"current channel's group does not exceed 'max'.  If the number\n"
+"does not exceed 'max', we continue to the next step. If the\n"
+"number does in fact exceed max, if priority n+101 exists, then\n"
+"execution continues at that step, otherwise -1 is returned.\n";
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+static int group_get_count(char *group)
+{
+	/* XXX ast_channel_walk needs to be modified to
+	       prevent a race in which after we return the channel
+		   is no longer valid (or ast_channel_free can be modified
+		   just as well) XXX */
+	struct ast_channel *chan;
+	int count = 0;
+	char *test;
+	if (group && strlen(group)) {
+		chan = ast_channel_walk(NULL);
+		while(chan) {
+			test = pbx_builtin_getvar_helper(chan, "GROUP");
+			if (!strcasecmp(test, group))
+				count++;
+			chan = ast_channel_walk(chan);
+		}
+	}
+	return count;
+}
+
+static int group_count_exec(struct ast_channel *chan, void *data)
+{
+	int res=0;
+	int count;
+	struct localuser *u;
+	char *group=NULL;
+	char ret[80];
+
+	LOCAL_USER_ADD(u);
+
+	/* Check and parse arguments */
+	if (data && strlen(data)) {
+		group = (char *)data;
+	} else {
+		group = pbx_builtin_getvar_helper(chan, "GROUP");
+	}
+	count = group_get_count(group);
+	snprintf(ret, sizeof(ret), "%d", count);
+	pbx_builtin_setvar_helper(chan, "GROUPCOUNT", ret);
+	LOCAL_USER_REMOVE(u);
+	return res;
+}
+
+static int group_set_exec(struct ast_channel *chan, void *data)
+{
+	int res=0;
+	struct localuser *u;
+
+	LOCAL_USER_ADD(u);
+	/* Check and parse arguments */
+	if (data && strlen(data)) {
+		pbx_builtin_setvar_helper(chan, "GROUP", (char *)data);
+	} else
+		ast_log(LOG_WARNING, "GroupSet requires an argument (group name)\n");
+
+	LOCAL_USER_REMOVE(u);
+	return res;
+}
+
+static int group_check_exec(struct ast_channel *chan, void *data)
+{
+	int res=0;
+	int max, count;
+	struct localuser *u;
+
+	LOCAL_USER_ADD(u);
+
+	if (data && (sscanf((char *)data, "%i", &max) == 1) && (max > -1)) {	
+		count = group_get_count(pbx_builtin_getvar_helper(chan, "GROUP"));
+		if (count > max) {
+			if (ast_exists_extension(chan, chan->context, chan->exten, chan->priority + 101, chan->callerid))
+				chan->priority += 100;
+			else
+				res = -1;
+		}
+	} else
+		ast_log(LOG_WARNING, "GroupCheck requires a positive integer argument (max)\n");
+	LOCAL_USER_REMOVE(u);
+	return res;
+}
+
+int unload_module(void)
+{
+	int res;
+	STANDARD_HANGUP_LOCALUSERS;
+	res = ast_unregister_application(app_group_count);
+	res |= ast_unregister_application(app_group_set);
+	res |= ast_unregister_application(app_group_check);
+	return res;
+}
+
+int load_module(void)
+{
+	int res;
+	res = ast_register_application(app_group_count, group_count_exec, group_count_synopsis, group_count_descrip);
+	res |= ast_register_application(app_group_set, group_set_exec, group_set_synopsis, group_set_descrip);
+	res |= ast_register_application(app_group_check, group_check_exec, group_check_synopsis, group_check_descrip);
+	return res;
+}
+
+char *description(void)
+{
+	return tdesc;
+}
+
+int usecount(void)
+{
+	int res;
+	STANDARD_USECOUNT(res);
+	return res;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}