clean: moved funcs to specific files + GetPage usecase/repo

api/pageAuth.go

@@ -0,0 +1,91 @@
+package api
+
+import (
+	"bytes"
+	"encoding/json"
+	"net/http"
+	"os"
+	"strings"
+)
+
+const LoginRoute = "/login"
+
+type LoginPage struct {
+	IsError  bool   `json:"isError"`
+	Error    string `json:"error"`
+	Username string `json:"username"`
+}
+
+func NewLoginPage(error string, username string) *LoginPage {
+	return &LoginPage{
+		IsError:  strings.Compare(error, "") != 0,
+		Error:    error,
+		Username: username,
+	}
+}
+
+func GetLoginPageHandler(loginPage *LoginPage) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if IsLoggedIn(r) {
+			http.Redirect(w, r, "/home", http.StatusSeeOther)
+			return
+		}
+		if r.Method == http.MethodPost {
+			PostLoginPage(w, r)
+			return
+		}
+		bs, err := Container.GetPageUseCase.GetPage("login", &loginPage)
+		if err != nil {
+			_, _ = w.Write([]byte(err.Error()))
+		}
+		_, _ = w.Write(bs)
+	}
+}
+
+func PostLoginPage(w http.ResponseWriter, r *http.Request) {
+	_ = r.ParseForm()
+
+	credentials, err := json.Marshal(&UserLogin{
+		Username: r.FormValue("username"),
+		Password: r.FormValue("password"),
+	})
+	if err != nil {
+		r.Method = http.MethodGet
+		GetLoginPageHandler(NewLoginPage("Invalid username or password.", r.FormValue("username")))(w, r)
+		return
+	}
+
+	response, err := http.Post(
+		"http://localhost:"+os.Getenv("PORT")+"/v1/auth/login",
+		"application/json",
+		bytes.NewBuffer(credentials))
+
+	if err != nil || response.StatusCode != http.StatusOK {
+		r.Method = http.MethodGet
+		GetLoginPageHandler(NewLoginPage("Invalid username or password.", r.FormValue("username")))(w, r)
+		return
+	}
+
+	w.Header().Set("Set-Cookie", response.Header.Get("Set-Cookie"))
+
+	http.Redirect(w, r, "/home", http.StatusSeeOther)
+}
+
+func GetLogin(w http.ResponseWriter, r *http.Request) {
+	http.Redirect(w, r, LoginRoute, http.StatusPermanentRedirect)
+}
+
+func GetLogout(w http.ResponseWriter, r *http.Request) {
+	RemoveJwtCookie(w)
+	http.Redirect(w, r, LoginRoute, http.StatusSeeOther)
+}
+
+func IsLoggedInMiddleware(next http.Handler) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if !IsLoggedIn(r) {
+			http.Redirect(w, r, LoginRoute, http.StatusSeeOther)
+			return
+		}
+		next.ServeHTTP(w, r)
+	})
+}