Count open incidents group by Priority and State using GlideAggregate (#2613)

* Initial create script.js

* Create README.md

* Updated mistyped variable

Author: DavidMarcial

Core ServiceNow APIs/GlideAggregate/Count open Incidents per Priority and State using GlideAggregate/README.md

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+# Count open Incidents per Priority and State using GlideAggregate
+
+## Overview
+This script will dynamically calculate the **number of open incidents** for each priority level and also give you a total for what 
+current state the Incident is in using **server-side scripting**
+Priority levels typically include:  
++ 1 – Critical  
++ 2 – High  
++ 3 – Moderate  
++ 4 – Low
+
+Incident State typically include:
++ New
++ In Progress
++ On Hold
++ Resolved
++ Closed
++ Canceled
+
+The scripting solution leverages **GlideAggregate** to efficiently count records grouped by priority and state. This scripts approach
+is useful for:
++ Dashboards
++ Business Rules
++ SLA monitoring and reporting
+ 
+--
+## Table and Fields
++ **Table:** Task
++ **Fields:** Priority, State

Core ServiceNow APIs/GlideAggregate/Count open Incidents per Priority and State using GlideAggregate/script.js

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+/*
+*Going to define the Incident Closed and Canceled state since we dont want those records as part of our query. 
+*Also going to leverage the IncidentStateSNC script from ServiceNow
+*/
+
+/*
+*Going to define the Incident Closed and Canceled state since we dont want those records as part of our query. 
+*/
+var incident_close = IncidentStateSNC.CLOSED;
+var incident_canceled = IncidentStateSNC.CANCELED;
+var incident_state_query = incident_close + "," + incident_canceled;
+
+/*
+*Creating the Incident State value object that will house the correct incident state since we are working from the Task table.
+*Leveraging the IncidentStateSNC script from ServiceNow to get the values that they should be
+*/
+var incident_states = {
+  '1':'New',
+  '2':'In Progress',
+  '3':'On Hold',
+  '6':'Resolved',
+  '7':'Closed',
+  '8':'Canceled'
+};
+
+//Going to create the GlideAggregate object
+var ga = new GlideAggregate('task');
+ga.addQuery('state', 'NOT IN', incident_state_query); //Going to exclude the canceled and closed incidents
+ga.addQuery('sys_class_name', 'incident'); //Since working on the Task table need to grab only Incident records with task type
+ga.groupBy('state');
+ga.groubBy('count');
+ga.addAggregate('COUNT');
+ga.query()
+
+gs.info('The following is a list of Open Incident records');
+
+while (ga.next()) {
+
+  var priorityValue = ga.getDisplayValue('priority');
+  var state = ga.getValue('state');
+  var count = ga.getValue('COUNT');
+
+  gs.info("There are a total of: " + count + " Incidents with a priority of " + priorityValue + " and in a state of " + incident_states[state]);
+  
+}