FS-8822 - [mod_callcenter] Realtime counter for calls in a queue

Added counters for answered and abandoned calls for a queue.

Create two vars for cc_queue struct
    - calls_answered
    - calls_abandoned

These increases when the call is hangup.

This change also :
 - refactor long lines of header and body to  print the queue information.
 - Update year in copyright

src/mod/applications/mod_callcenter/mod_callcenter.c

 /* 
  * FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
- * Copyright (C) 2005-2014, Anthony Minessale II <anthm@freeswitch.org>
+ * Copyright (C) 2005-2016, Anthony Minessale II <anthm@freeswitch.org>
  *
  * Version: MPL 1.1
  *
@@ -444,6 +444,8 @@ struct cc_queue {
 	uint32_t max_wait_time;
 	uint32_t max_wait_time_with_no_agent;
 	uint32_t max_wait_time_with_no_agent_time_reached;
+	uint32_t calls_answered;
+	uint32_t calls_abandoned;
 
 	switch_mutex_t *mutex;
 
@@ -722,6 +724,8 @@ static cc_queue_t *load_queue(const char *queue_name)
 
 		queue->last_agent_exist = 0;
 		queue->last_agent_exist_check = 0;
+		queue->calls_answered = 0;
+		queue->calls_abandoned = 0;
 
 		switch_mutex_init(&queue->mutex, SWITCH_MUTEX_NESTED, queue->pool);
 		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Added queue %s\n", queue->name);
@@ -2871,6 +2875,7 @@ SWITCH_STANDARD_APP(callcenter_function)
 						  switch_str_nil(switch_channel_get_variable(member_channel, "caller_id_name")),
 						  switch_str_nil(switch_channel_get_variable(member_channel, "caller_id_number")),
 						  queue_name, cc_member_cancel_reason2str(h->member_cancel_reason));
+		queue->calls_abandoned++;
 
 	} else {
 		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(member_session), SWITCH_LOG_DEBUG, "Member %s <%s> is answered by an agent in queue %s\n", switch_str_nil(switch_channel_get_variable(member_channel, "caller_id_name")), switch_str_nil(switch_channel_get_variable(member_channel, "caller_id_number")), queue_name);
@@ -2883,6 +2888,7 @@ SWITCH_STANDARD_APP(callcenter_function)
 
 		/* Update some channel variables for xml_cdr needs */
 		switch_channel_set_variable_printf(member_channel, "cc_cause", "%s", "answered");
+		queue->calls_answered++;
 
 	}
 
@@ -3300,7 +3306,12 @@ SWITCH_STANDARD_API(cc_config_api_function)
 			/* queue list */
 			if (argc-initial_argc < 1) {
 				switch_hash_index_t *hi;
-				stream->write_function(stream, "%s", "name|strategy|moh_sound|time_base_score|tier_rules_apply|tier_rule_wait_second|tier_rule_wait_multiply_level|tier_rule_no_agent_no_wait|discard_abandoned_after|abandoned_resume_allowed|max_wait_time|max_wait_time_with_no_agent|max_wait_time_with_no_agent_time_reached|record_template\n");
+				stream->write_function(stream, "%s",
+				                       "name|strategy|moh_sound|time_base_score|tier_rules_apply|"\
+				                       "tier_rule_wait_second|tier_rule_wait_multiply_level|"\
+				                       "tier_rule_no_agent_no_wait|discard_abandoned_after|"\
+				                       "abandoned_resume_allowed|max_wait_time|max_wait_time_with_no_agent|"\
+				                       "max_wait_time_with_no_agent_time_reached|record_template|calls_answered|calls_abandoned\n");
 				switch_mutex_lock(globals.mutex);
 				for (hi = switch_core_hash_first(globals.queue_hash); hi; hi = switch_core_hash_next(&hi)) {
 					void *val = NULL;
@@ -3309,7 +3320,23 @@ SWITCH_STANDARD_API(cc_config_api_function)
 					cc_queue_t *queue;
 					switch_core_hash_this(hi, &key, &keylen, &val);
 					queue = (cc_queue_t *) val;
-					stream->write_function(stream, "%s|%s|%s|%s|%s|%d|%s|%s|%d|%s|%d|%d|%d|%s\n", queue->name, queue->strategy, queue->moh, queue->time_base_score, (queue->tier_rules_apply?"true":"false"), queue->tier_rule_wait_second, (queue->tier_rule_wait_multiply_level?"true":"false"), (queue->tier_rule_no_agent_no_wait?"true":"false"), queue->discard_abandoned_after, (queue->abandoned_resume_allowed?"true":"false"), queue->max_wait_time, queue->max_wait_time_with_no_agent, queue->max_wait_time_with_no_agent_time_reached, queue->record_template);
+					stream->write_function(stream, "%s|%s|%s|%s|%s|%d|%s|%s|%d|%s|%d|%d|%d|%s|%d|%d\n",
+					                       queue->name,
+					                       queue->strategy,
+					                       queue->moh,
+					                       queue->time_base_score,
+					                       (queue->tier_rules_apply?"true":"false"),
+					                       queue->tier_rule_wait_second,
+					                       (queue->tier_rule_wait_multiply_level?"true":"false"),
+					                       (queue->tier_rule_no_agent_no_wait?"true":"false"),
+					                       queue->discard_abandoned_after,
+					                       (queue->abandoned_resume_allowed?"true":"false"),
+					                       queue->max_wait_time,
+					                       queue->max_wait_time_with_no_agent,
+					                       queue->max_wait_time_with_no_agent_time_reached,
+					                       queue->record_template,
+					                       queue->calls_answered,
+					                       queue->calls_abandoned);
 					queue = NULL;
 				}
 				switch_mutex_unlock(globals.mutex);