feat: Added uptime calculation method

dto/service.go

@@ -6,4 +6,5 @@ type PublicService struct {
 	Name        string         `json:"name"`
 	Description string         `json:"description"`
 	Statuses    []model.Status `json:"statuses"`
+	Uptime      float64        `json:"uptime"`
 }

model/service.go

@@ -1,5 +1,7 @@
 package model
 
+import "math"
+
 type HTTPConfig struct {
 	Method  string            `json:"method"`
 	Headers map[string]string `json:"headers"`
@@ -45,3 +47,29 @@ func (s Service) CountLastStatuses(status StatusCode) uint {
 
 	return count
 }
+
+func (s Service) CalculateUptimePercent() float64 {
+	var uptime float64
+
+	if len(s.Statuses) == 0 {
+		return uptime
+	}
+
+	var countOfOkStatus int
+
+	for i := range s.Statuses {
+		if s.Statuses[i].Status == StatusOK {
+			countOfOkStatus++
+		}
+	}
+
+	if countOfOkStatus == 0 {
+		return uptime
+	}
+
+	sla := 100 - (float64(len(s.Statuses)) / float64(countOfOkStatus))
+	ratio := math.Pow(10, float64(2))
+	uptime = math.Round(sla*ratio) / ratio
+
+	return uptime
+}

transform/service.go

@@ -18,7 +18,8 @@ func PublicServices(items ...model.Service) []dto.PublicService {
 func PublicService(item model.Service) dto.PublicService {
 	return dto.PublicService{
 		Name:        item.Name,
-		Description: item.Description,
+		Description: item.PublicDescription,
 		Statuses:    item.Statuses,
+		Uptime:      item.CalculateUptimePercent(),
 	}
 }