EmployeeTriggerExample

trigger Employee_Demo on Employee__c (after insert, after update) {
	//Create a map of the leaves for each Gender/Status Combo. Consider a setting for this
    Map<String, List<String> > LeaveTypeMap = new Map<String, List<String> > ();
    LeaveTypeMap.put('Female:Full Time', new List<String>{'Maternity Leave','Annual Leave','Personal Leave','Unpaid Leave'});
    LeaveTypeMap.put('Male:Full Time', new List<String>{'Paternity Leave','Annual Leave','Personal Leave','Unpaid Leave'});
    LeaveTypeMap.put('Female:Part Time', new List<String>{'Unpaid Leave'});
    LeaveTypeMap.put('Male:Part Time', new List<String>{'Unpaid Leave'});
    //Create list to hold new leave records
    List<Leave__c> LeavestoCreate = new List<Leave__c> ();
    //Is this an insert? If so, just create records
    if (Trigger.IsInsert) {                     
		for(Employee__c l : trigger.new){
			String sEmpType = l.Gender__c + ':' + l.Status__c;
            
                for (String type : LeaveTypeMap.get(sEmpType)) {
					          Leave__c Child = new Leave__c();
                    //create the Child record as in your example, with this extra bit for the male/female case
                    Child.Leave_Type__c = type;
                    Child.Employee__c = l.Id;
					      LeavestoCreate.add(Child);
				}

			}
    
	insert LeavestoCreate;
    }
    //If update, and it is the status changing delete and recreate perhaps?
    if (Trigger.IsUpdate) {
        //Did Status change? First build list of changes
        List<Employee__c> EmployeesToUpdate = new List<Employee__c>();
        for(Employee__c l : trigger.new){
            //use the Trigger old map collection to see what value was before the user made the change
            if (l.Status__c <> trigger.oldmap.get(l.Id).Status__c) {
                EmployeesToUpdate.add(l);
                }
        }
        //Query for leaves that are no longer valid so we can delete them
        List<Leave__c> LeavestoDelete = [Select Id FROM Leave__c WHERE 	Employee__c IN :EmployeesToUpdate];
        //Now create new ones - but only loop through employees who have changed status
        for(Employee__c l : EmployeesToUpdate){
			  //We could move this code to a class and then re-use code, but for demo purposes we'll just repeat
              String sEmpType = l.Gender__c + ':' + l.Status__c;
            
                for (String type : LeaveTypeMap.get(sEmpType)) {
					          Leave__c Child = new Leave__c();
                    //create the Child record as in your example, with this extra bit for the male/female case
                    Child.Leave_Type__c = type;
                    Child.Employee__c = l.Id;
					LeavestoCreate.add(Child);
				}

			}
    
	  //Finally create new records
    insert LeavestoCreate;
    //Delete old ones
    delete LeavestoDelete;
    }
    
    
    
}