Round Robin Method for Incident Assignment Logic (#1851)

* Round Robin Method for Incident Assignment Logic

Author: trupti65

Server-Side Components/Business Rules/Round Robin for Incident Assignment/README.md

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+UseCase - 
+
+
+
+When a new Incident is created, the system should automatically assign it to the next available member of the assignment group — in a Round Robin fashion (i.e., distributing incidents evenly among all group members).
+
+It will also work for New addition of new user. and distribute the incident equally to all the users.
+

Server-Side Components/Business Rules/Round Robin for Incident Assignment/Round Robin method for Incident Assignment.js

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+(function executeRule(current, previous /*null when async*/) {
+
+	var agg = new GlideAggregate('incident');
+    	agg.addQuery('assignment_group', current.assignment_group);
+    	agg.addAggregate('count');
+    	agg.query();
+
+	var ga = new GlideAggregate('sys_user_grmember');
+    	ga.addQuery('group', current.assignment_group);
+    	ga.addAggregate('count');
+    	ga.query();
+
+	if (agg.next() && ga.next()) {
+        	if (Number(agg.getAggregate('count')) <= Number(ga.getAggregate('count')) {
+
+            		var grmem = new GlideRecord('sys_user_grmember');
+            		grmem.addQuery('group', current.assignment_group);
+            		grmem.query();
+	
+            		while (grmem.next()) {
+
+                		var inc = new GlideRecord('incident');
+                		inc.addQuery('assignment_group', grmem.group);
+                		inc.addQuery('assigned_to', grmem.user);
+                		inc.query();
+
+                		if (!inc.hasNext()) {
+                    			current.assigned_to = grmem.user;
+                    			current.update();
+                    			return;
+                		}
+            		}
+
+        	} else {
+            		var min_assignement_group_count, rec_sys_id = null;
+            		var count = new GlideAggregate('incident');
+            		count.addQuery('assignment_group', current.assignment_group);
+            		count.groupBy('assigned_to');
+		        count.addNotNullQuery('assigned_to');
+            		count.addAggregate('count');
+            		count.query();
+
+            		if (count.next()) {
+                		min_assignement_group_count = Number(count.getAggregate('count'));
+                		rec_sys_id = count.getValue('assigned_to');
+            		}
+
+            		count.query();
+
+            		while (count.next()) {
+                		var countfinal = Number(count.getAggregate('count'));
+                		if (countfinal < min_assignement_group_count) {
+                    		min_assignement_group_count = countfinal;
+                    		rec_sys_id = count.getValue('assigned_to');
+                	}
+            }
+
+            if (rec_sys_id == null) {
+                var gr_inc = new GlideRecord('sys_user_grmember');
+                gr_inc.addQuery('group', current.assignment_group);
+                gr_inc.query();
+                if (gr_inc.next()) {
+                    rec_sys_id = gr_inc.user;
+                }
+            }
+
+            current.assigned_to = rec_sys_id;
+            current.update();
+        }
+
+    }
+	
+})(current, previous);