add proxy server for dynamic api endpoint handling and auth

proxy/auth.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+)
+
+const (
+	OsuApiUrl = "https://osu.ppy.sh/api/v2"
+)
+
+var clientid = os.Getenv("CLIENT_ID")
+var clientsecret = os.Getenv("CLIENT_SECRET")
+var redirect_uri = os.Getenv("REDIRECT_URI")
+var scopes = []string{
+	"public",
+	"identify",
+}
+
+type OsuApiClient struct {
+	User       User
+	BaseURL    string
+	HTTPclient *http.Client
+}
+
+func NewOsuApiClient(user User) (*OsuApiClient, error) {
+
+	if user.Token == (Token{}) {
+		return nil, errors.New("No Valid Credentials")
+	}
+
+	if time.Now().After(user.ExpireDate) {
+
+	}
+
+	return &OsuApiClient{
+		User:    user,
+		BaseURL: OsuApiUrl,
+		HTTPclient: &http.Client{
+			Timeout: time.Minute * 2},
+	}, nil
+}
+
+func LoginRedirect(w http.ResponseWriter, r *http.Request) {
+
+	fmt.Println(r.Context())
+	cookie, ok := r.Context().Value("cookie").(string)
+
+	if !ok || cookie == "" {
+		fmt.Println(cookie, ok)
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+		return
+	}
+
+	http.Redirect(w, r,
+		fmt.Sprintf("https://osu.ppy.sh/oauth/authorize?client_id=%s&redirect_uri=%s&response_type=code&scope=%s&state=%s",
+			clientid,
+			redirect_uri,
+			strings.Join(scopes, " "),
+			cookie),
+		http.StatusPermanentRedirect)
+}