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oblig1/endpoints/status.go

+package endpoints
+
+import (
+	"encoding/json"
+	"net/http"
+	"time"
+)
+
+// Global variable to store the service start time.
+var startTime = time.Now()
+
+// DiagnosticResponse represents the structure of diagnostics response.
+type DiagnosticResponse struct {
+	GutendexAPIStatus  int     `json:"gutendexapi"`
+	LanguageAPIStatus  int     `json:"languageapi"`
+	CountriesAPIStatus int     `json:"countriesapi"`
+	Version            string  `json:"version"`
+	Uptime             float64 `json:"uptime"`
+}
+
+// checkAPIStatus checks the status of an API by sending a GET request and returning the HTTP status code.
+func checkAPIStatus(apiURL string) int {
+	response, err := http.Get(apiURL)
+	if err != nil {
+		return http.StatusInternalServerError
+	}
+	defer response.Body.Close()
+	return response.StatusCode
+}
+
+// StatusHandler handles requests to the /librarystats/v1/status/ endpoint.
+func StatusHandler(w http.ResponseWriter, r *http.Request) {
+	// Check the status of Gutendex, Language2Countries, and REST Countries APIs.
+	gutendexStatus := checkAPIStatus("http://129.241.150.113:8000/")
+	language2CountriesStatus := checkAPIStatus("http://129.241.150.113:3000/")
+	restCountriesStatus := checkAPIStatus("http://129.241.150.113:8080/v3.1/alpha/")
+
+	// Example response for testing purposes.
+	response := DiagnosticResponse{
+		GutendexAPIStatus:  gutendexStatus,
+		LanguageAPIStatus:  language2CountriesStatus,
+		CountriesAPIStatus: restCountriesStatus,
+		Version:            "v1",
+		Uptime:             time.Since(startTime).Seconds(),
+	}
+
+	sendJSONResponse(w, response)
+}
+
+// sendJSONResponse sends a JSON response with the provided data.
+func sendJSONResponse(w http.ResponseWriter, data interface{}) {
+	w.WriteHeader(http.StatusOK)
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(data)
+}