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package main
import (
"fmt"
"html/template"
"io"
"log"
"net/http"
"os"
"strings"
"github.com/joho/godotenv"
)
const youtubeAPI = "https://www.googleapis.com/youtube/v3/"
var tmpl = template.Must(template.ParseFiles("templates/watch.html"))
func apiRequest(w http.ResponseWriter, r *http.Request, endpoint string, videoIdParam string, part string) {
videoID := r.URL.Query().Get("id")
if videoID == "" {
msg := "Missing ?id=VIDEO_ID parameter"
http.Error(w, msg, http.StatusBadRequest)
return
}
apiKey := os.Getenv("API_KEY")
if apiKey == "" {
msg := "API_KEY environment variable not set"
http.Error(w, msg, http.StatusInternalServerError)
log.Println(msg)
return
}
//url := fmt.Sprintf("%s?part=snippet&id=%s&key=%s", youtubeAPI, videoID, apiKey)
url := fmt.Sprintf("%s?part=%s&%s=%s&key=%s", youtubeAPI + endpoint, part, videoIdParam, videoID, apiKey)
resp, err := http.Get(url)
if err != nil {
msg := "Failed to fetch video info: " + err.Error()
http.Error(w, msg, http.StatusInternalServerError)
log.Println(msg)
return
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
msg := "YouTube API error: " + resp.Status
http.Error(w, msg, http.StatusBadGateway)
log.Println(msg)
return
}
w.Header().Set("Content-Type", "application/json")
io.Copy(w, resp.Body)
}
func videoDetailsHandler(w http.ResponseWriter, r *http.Request) {
apiRequest(w, r, "videos", "id", "snippet,statistics,topicDetails")
}
func commentThreadsHandler(w http.ResponseWriter, r *http.Request) {
apiRequest(w, r, "commentThreads", "videoId", "snippet,replies&maxResults=100")
}
func handler(w http.ResponseWriter, r *http.Request) {
path := strings.Trim(r.URL.Path, "/")
if path == "" {
path = "world"
}
data := struct {
Id string
}{
Id: path,
}
err := tmpl.Execute(w, data)
if err != nil {
msg := "Template execution error"
http.Error(w, msg, http.StatusInternalServerError)
log.Println(msg)
}
}
func main() {
// load .env file if it exists
godotenv.Load()
// setup routes
http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))
http.HandleFunc("/api/details", videoDetailsHandler)
http.HandleFunc("/api/comments", commentThreadsHandler)
http.HandleFunc("/", handler)
log.Println("Listening on http://localhost:8080")
err := http.ListenAndServe(":8080", nil)
if err != nil {
log.Fatal(err)
}
}
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