SLA Checker

Authors

• @brennii96

SLA Checker

The slachecker package allows you to manage and evaluate Service Level Agreements (SLAs) by taking into account business hours, valid business days, and holidays. It provides functionality to determine if a given time is within the SLA duration and offers detailed compliance information.

Features

• SLA Struct: Defines the SLA configuration.
• SLAResult Struct: Contains the result of the SLA evaluation.
• Key Methods:
  • IsWithinSLA(currentTime time.Time) bool
  • CheckSLA(currentTime time.Time) SLAResult

Installation

cd into your project and init the module.

  cd project
  go mod init github.com/brennii96/sla-checker

Usage/Examples

The holidays modules is using the Date.nager.at API to get public holidays for a given year and country code.

Import the required modules

import (
    "github.com/brennii96/sla-checker/pkg/holidays"
	"github.com/brennii96/sla-checker/pkg/slachecker"
)

// Parse SLA start and end times
startTime, err := time.Parse(time.RFC3339, reqBody.SLAStartTime)
if err != nil {
    http.Error(w, "Invalid SLA start time format", http.StatusBadRequest)
    return
}

// Fetch holidays (if required)
holidays, err := holidays.FetchHolidays(time.Now().Year(), reqBody.CountryCode)
if err != nil {
    http.Error(w, "Error fetching holidays", http.StatusInternalServerError)
    return
}

// Convert validDays strings to time.Weekday
var validDays []time.Weekday
for _, day := range reqBody.ValidDays {
    switch day {
    case "Monday":
        validDays = append(validDays, time.Monday)
    case "Tuesday":
        validDays = append(validDays, time.Tuesday)
    case "Wednesday":
        validDays = append(validDays, time.Wednesday)
    case "Thursday":
        validDays = append(validDays, time.Thursday)
    case "Friday":
        validDays = append(validDays, time.Friday)
    case "Saturday":
        validDays = append(validDays, time.Saturday)
    case "Sunday":
        validDays = append(validDays, time.Sunday)
    default:
        http.Error(w, "Invalid valid day", http.StatusBadRequest)
        return
    }
}

// Create SLA object
sla := slachecker.SLA{
    StartTime: startTime,
    SLALength: reqBody.SLALength,
    TimeUnit:  reqBody.TimeUnit,
    BusinessHours: struct {
        StartHour int
        EndHour   int
    }{
        StartHour: reqBody.BusinessHours.StartHour,
        EndHour:   reqBody.BusinessHours.EndHour,
    },
    ValidDays: validDays,
    Holidays:  holidays,
}
// Check if current time is within SLA
currentTime := time.Now()
// isWithinSLA := sla.IsWithinSLA(currentTime) // returns simple true/false
result := sla.CheckSLA(currentTime)

SLA

type SLA struct {
	StartTime     time.Time
	SLALength     int    // SLA duration, e.g., 4
	TimeUnit      string // SLA time unit, e.g., "hours", "minutes"
	BusinessHours struct {
		StartHour int
		EndHour   int
	}
	ValidDays      []time.Weekday // e.g., []time.Weekday{time.Monday, time.Tuesday, ...}
	Holidays       []time.Time    // Specific holidays when SLA is not applicable
	IgnoreHolidays bool           // Should holidays be taking into account when calculating SLAs
}

CheckSLA result will be:

// SLAResult contains the details about SLA status
type SLAResult struct {
	IsWithinSLA          bool      `json:"isWithinSLA"`
	Deadline             time.Time `json:"deadline"`
	Remaining            string    `json:"remaining"`
	Overage              string    `json:"overage,omitempty"`
	WorkingTimeRemaining string    `json:"workingTimeRemaining"`
}

License

MIT