call_center: fix MI cc_list_calls state print

(cherry picked from commit 09c3fb9)

modules/call_center/call_center.c

@@ -1239,13 +1239,9 @@ static struct mi_root* mi_cc_list_calls(struct mi_root *cmd_tree, void *param)
 	struct mi_node *node;
 	struct mi_node *rpl;
 	struct mi_attr *attr;
+	str *state;
 	char *p;
 	int len;
-	static str call_state[12]= {{"none", 4},
-			{"welcome", 7},
-			{"queued", 6},
-			{"toagent", 7},
-			{"ended", 5}};
 
 	rpl_tree = init_mi_tree( 200, MI_SSTR("OK") );
 	if ( rpl_tree==NULL)
@@ -1269,10 +1265,10 @@ static struct mi_root* mi_cc_list_calls(struct mi_root *cmd_tree, void *param)
 				goto error;
 		if(call->ign_cback)
 			attr = add_mi_attr( node, MI_DUP_VALUE, MI_SSTR("State"), MI_SSTR("ignored"));
-		else
-			attr = add_mi_attr( node, MI_DUP_VALUE, MI_SSTR("State"), call_state[call->state].s, call_state[call->state].len);
-		if (attr==NULL)
-				goto error;
+		else {
+			state = call_state_str(call->state);
+			attr = add_mi_attr( node, MI_DUP_VALUE, MI_SSTR("State"), state->s, state->len);
+		}
 
 		LM_DBG("call->recv_time= %d, ticks= %d\n", call->recv_time, get_ticks());
 		if(call->state != CC_CALL_ENDED)

modules/call_center/cc_data.h

@@ -155,6 +155,24 @@ typedef enum {
 	CC_CALL_ENDED
 } call_state;
 
+static inline str *call_state_str(call_state state)
+{
+	static str call_state_s[] = {
+		str_init("none"),
+		str_init("welcome"),
+		str_init("dissuading1"),
+		str_init("dissuading2"),
+		str_init("queued"),
+		str_init("preagent"),
+		str_init("toagent"),
+		str_init("ended"),
+		/* unused */
+		str_init("unknown"),
+	};
+	int size = (sizeof(call_state_s)/sizeof(call_state_s[0]));
+	return &call_state_s[(state < size - 1)?state:size - 1];
+}
+
 #define FSTAT_INCALL  (1<<0)
 #define FSTAT_DIST    (1<<1)
 #define FSTAT_ANSW    (1<<2)