From 4cc312d2d46d77bdabad0fa5753300f39787f901 Mon Sep 17 00:00:00 2001
From: Leo Correa <lcorr005@gmail.com>
Date: Tue, 12 Jan 2016 21:32:40 -0500
Subject: [PATCH] Add debug API call timing. Also, increased the timeout to 20
 seconds which gives slow clients a bit more time to complete the calls

---
 cmd/debug.go | 73 +++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 61 insertions(+), 12 deletions(-)

diff --git a/cmd/debug.go b/cmd/debug.go
index 26cf0edbd..9fc89487b 100644
--- a/cmd/debug.go
+++ b/cmd/debug.go
@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"os"
 	"runtime"
+	"sync"
 	"time"
 
 	"github.com/codegangsta/cli"
@@ -13,16 +14,23 @@ import (
 	"github.com/exercism/cli/paths"
 )
 
+type pingResult struct {
+	URL     string
+	Service string
+	Status  string
+	Latency time.Duration
+}
+
 // Debug provides information about the user's environment and configuration.
 func Debug(ctx *cli.Context) {
 	defer fmt.Printf("\nIf you are having trouble and need to file a GitHub issue (https://github.com/exercism/exercism.io/issues) please include this information (except your API key. Keep that private).\n")
 
-	client := http.Client{Timeout: 5 * time.Second}
+	client := &http.Client{Timeout: 20 * time.Second}
 
 	fmt.Printf("\n**** Debug Information ****\n")
 	fmt.Printf("Exercism CLI Version: %s\n", ctx.App.Version)
 
-	rel, err := fetchLatestRelease(client)
+	rel, err := fetchLatestRelease(*client)
 	if err != nil {
 		log.Println("unable to fetch latest release: " + err.Error())
 	} else {
@@ -61,18 +69,59 @@ func Debug(ctx *cli.Context) {
 		fmt.Println("Config file: <not configured>")
 		fmt.Println("API Key: <not configured>")
 	}
-
-	fmt.Printf("API: %s [%s]\n", c.API, pingURL(client, c.API))
-	fmt.Printf("XAPI: %s [%s]\n", c.XAPI, pingURL(client, c.XAPI))
 	fmt.Printf("Exercises Directory: %s\n", c.Dir)
-}
 
-func pingURL(client http.Client, url string) string {
-	res, err := client.Get(url)
-	if err != nil {
-		return err.Error()
+	fmt.Println("Testing API endpoints reachability")
+
+	endpoints := map[string]string{
+		"API":        c.API,
+		"XAPI":       c.XAPI,
+		"GitHub API": "https://api.github.com/",
 	}
-	defer res.Body.Close()
 
-	return "connected"
+	var wg sync.WaitGroup
+	results := make(chan pingResult)
+	defer close(results)
+
+	wg.Add(len(endpoints))
+
+	for service, url := range endpoints {
+		go func(service, url string) {
+			now := time.Now()
+			res, err := client.Get(url)
+			delta := time.Since(now)
+			if err != nil {
+				results <- pingResult{
+					URL:     url,
+					Service: service,
+					Status:  err.Error(),
+					Latency: delta,
+				}
+				return
+			}
+			defer res.Body.Close()
+
+			results <- pingResult{
+				URL:     url,
+				Service: service,
+				Status:  "connected",
+				Latency: delta,
+			}
+		}(service, url)
+	}
+
+	go func() {
+		for r := range results {
+			fmt.Printf(
+				"\t* %s: %s [%s] %s\n",
+				r.Service,
+				r.URL,
+				r.Status,
+				r.Latency,
+			)
+			wg.Done()
+		}
+	}()
+
+	wg.Wait()
 }