1 files changed, 220 insertions, 0 deletions
diff --git a/trunk/funcs/func_dialgroup.c b/trunk/funcs/func_dialgroup.c
new file mode 100644
index 000000000..746784ba9
--- /dev/null
+++ b/trunk/funcs/func_dialgroup.c
@@ -0,0 +1,220 @@
+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 2007, Tilghman Lesher
+ *
+ * Tilghman Lesher <func_dialgroup__200709@the-tilghman.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ *
+ * \brief Dial group dialplan function
+ *
+ * \author Tilghman Lesher <func_dialgroup__200709@the-tilghman.com>
+ *
+ * \ingroup functions
+ */
+
+#include "asterisk.h"
+
+ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
+
+#include <sys/stat.h>
+
+#include "asterisk/module.h"
+#include "asterisk/channel.h"
+#include "asterisk/pbx.h"
+#include "asterisk/utils.h"
+#include "asterisk/app.h"
+#include "asterisk/astobj2.h"
+
+static struct ao2_container *group_container = NULL;
+
+struct group_entry {
+	char name[AST_CHANNEL_NAME];
+};
+
+struct group {
+	char name[AST_MAX_EXTENSION];
+	struct ao2_container *entries;
+};
+
+static void group_destroy(void *vgroup)
+{
+	struct group *group = vgroup;
+	ao2_ref(group->entries, -1);
+}
+
+static int group_hash_fn(const void *obj, const int flags)
+{
+	const struct group *g = obj;
+	return ast_str_hash(g->name);
+}
+
+static int group_cmp_fn(void *obj1, void *name2, int flags)
+{
+	struct group *g1 = obj1, *g2 = name2;
+	char *name = name2;
+	if (flags & OBJ_POINTER)
+		return strcmp(g1->name, g2->name) ? 0 : CMP_MATCH;
+	else
+		return strcmp(g1->name, name) ? 0 : CMP_MATCH;
+}
+
+static int entry_hash_fn(const void *obj, const int flags)
+{
+	const struct group_entry *e = obj;
+	return ast_str_hash(e->name);
+}
+
+static int entry_cmp_fn(void *obj1, void *name2, int flags)
+{
+	struct group_entry *e1 = obj1, *e2 = name2;
+	char *name = name2;
+	if (flags & OBJ_POINTER)
+		return strcmp(e1->name, e2->name) ? 0 : CMP_MATCH;
+	else
+		return strcmp(e1->name, name) ? 0 : CMP_MATCH;
+}
+
+static int dialgroup_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
+{
+	struct ao2_iterator i;
+	struct group *grhead = ao2_find(group_container, data, 0);
+	struct group_entry *entry;
+	size_t bufused = 0;
+	int trunc_warning = 0;
+
+	if (!grhead) {
+		ast_log(LOG_WARNING, "No such dialgroup '%s'\n", data);
+		return -1;
+	}
+
+	i = ao2_iterator_init(grhead->entries, 0);
+	while ((entry = ao2_iterator_next(&i))) {
+		int tmp = strlen(entry->name);
+		/* Ensure that we copy only complete names, not partials */
+		if (len - bufused > tmp + 2) {
+			if (bufused != 0)
+				buf[bufused++] = '&';
+			ast_copy_string(buf + bufused, entry->name, len - bufused);
+			bufused += tmp;
+		} else if (trunc_warning++ == 0)
+			ast_log(LOG_WARNING, "Dialgroup '%s' is too large.  Truncating list.\n", data);
+	}
+
+	return 0;
+}
+
+static int dialgroup_write(struct ast_channel *chan, const char *cmd, char *data, const char *cvalue)
+{
+	struct group *grhead;
+	struct group_entry *entry;
+	int j;
+	AST_DECLARE_APP_ARGS(args,
+		AST_APP_ARG(group);
+		AST_APP_ARG(op);
+	);
+	AST_DECLARE_APP_ARGS(inter,
+		AST_APP_ARG(faces)[100];
+	);
+	char *value = ast_strdupa(cvalue);
+
+	AST_STANDARD_APP_ARGS(args, data);
+	AST_NONSTANDARD_APP_ARGS(inter, value, '&');
+
+	if (!(grhead = ao2_find(group_container, data, 0))) {
+		/* Create group */
+		grhead = ao2_alloc(sizeof(*grhead), group_destroy);
+		if (!grhead)
+			return -1;
+		grhead->entries = ao2_container_alloc(37, entry_hash_fn, entry_cmp_fn);
+		if (!grhead->entries) {
+			ao2_ref(grhead, -1);
+			return -1;
+		}
+		ast_copy_string(grhead->name, args.group, sizeof(grhead->name));
+		ao2_link(group_container, grhead);
+	}
+
+	if (ast_strlen_zero(args.op)) {
+		/* Wholesale replacement of the group */
+		args.op = "add";
+
+		/* Remove all existing */
+		ao2_ref(grhead->entries, -1);
+		if (!(grhead->entries = ao2_container_alloc(37, entry_hash_fn, entry_cmp_fn)))
+			return -1;
+	}
+
+	if (strcasecmp(args.op, "add") == 0) {
+		for (j = 0; j < inter.argc; j++) {
+			if ((entry = ao2_alloc(sizeof(*entry), NULL))) {
+				ast_copy_string(entry->name, inter.faces[j], sizeof(entry->name));
+				ao2_link(grhead->entries, entry);
+			} else
+				ast_log(LOG_WARNING, "Unable to add '%s' to dialgroup '%s'\n", inter.faces[j], grhead->name);
+		}
+	} else if (strncasecmp(args.op, "del", 3) == 0) {
+		for (j = 0; j < inter.argc; j++) {
+			if ((entry = ao2_find(grhead->entries, inter.faces[j], OBJ_UNLINK)))
+				ao2_ref(entry, -1);
+			else
+				ast_log(LOG_WARNING, "Interface '%s' not found in dialgroup '%s'\n", inter.faces[j], grhead->name);
+		}
+	} else
+		ast_log(LOG_ERROR, "Unrecognized operation: %s\n", args.op);
+
+	return 0;
+}
+
+static struct ast_custom_function dialgroup_function = {
+	.name = "DIALGROUP",
+	.synopsis = "Manages a group of users for dialing",
+	.syntax = "DIALGROUP(<group>[,op])",
+	.desc =
+"  DIALGROUP presents an interface meant to be used in concert with the Dial\n"
+"application, by presenting a list of channels which should be dialled when\n"
+"referenced.\n"
+"  When DIALGROUP is read from, the argument is interpreted as the particular\n"
+"group for which a dial should be attempted.  When DIALGROUP is written to\n"
+"with no arguments, the entire list is replaced with the argument specified.\n"
+"Other operations are as follows:\n"
+"  add - add a channel name or interface (write-only)\n"
+"  del - remove a channel name or interface (write-only)\n\n"
+"Functionality is similar to a queue, except that when no interfaces are\n"
+"available, execution may continue in the dialplan.  This is useful when\n"
+"you want certain people to be the first to answer any calls, with immediate\n"
+"fallback to a queue when the front line people are busy or unavailable, but\n"
+"you still want front line people to log in and out of that group, just like\n"
+"a queue.\n",
+	.read = dialgroup_read,
+	.write = dialgroup_write,
+};
+
+static int unload_module(void)
+{
+	int res = ast_custom_function_unregister(&dialgroup_function);
+	ao2_ref(group_container, -1);
+	return res;
+}
+
+static int load_module(void)
+{
+	if ((group_container = ao2_container_alloc(37, group_hash_fn, group_cmp_fn)))
+		return ast_custom_function_register(&dialgroup_function);
+	else
+		return AST_MODULE_LOAD_DECLINE;
+}
+
+AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Dialgroup dialplan function");