Javascript , node.js question

getEmployeesByStatus(status) Function

• This function will provide an array of "employee" objects whose status property matches the status parameter (ie: if status is "Full Time" then the array will consist of only "Full Time" employees) using the resolve method of the returned promise.
• If for some reason, the length of the array is 0 (no results returned), this function must invoke the reject method and pass a meaningful message, ie: "no results returned".

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getEmployeesByDepartment(department) Function

• This function will provide an array of "employee" objects whose department property matches the department parameter (ie: if department is 5 then the array will consist of only employees who belong to department 5 ) using the resolve method of the returned promise.
• If for some reason, the length of the array is 0 (no results returned), this function must invoke the reject method and pass a meaningful message, ie: "no results returned".