registration. yay.

2 files changed, 157 insertions, 35 deletions

diff --git a/charakterin.go b/charakterin.go
index abf9627..142484c 100644
--- a/charakterin.go
+++ b/charakterin.go
@@ -12,10 +12,19 @@ import (
         _ "github.com/lib/pq"
 )
 
+const (
+        NoSuchUser      = "pq: no_such_user"
+        InvalidPassword = "pq: invalid_password"
+        UsernameTaken = "pq: username_taken"
+        EmailAlreadyRegistered = "pq: email_already_registered"
+)
+
 // Renderer wird verwendet, um die Routen (bspw. Login-Route) zu rendern. Damit bleibt Charakterin selbst ohne Template.
 type Renderer interface {
         // RenderLoginPage zeigt die Login-Seite an.
         RenderLoginPage(w http.ResponseWriter, data map[string]interface{})
+        // RenderRegistrationPage zeigt die Registrations-Seite an.
+        RenderRegistrationPage(w http.ResponseWriter, data map[string]interface{})
 }
 
 // Charakterin ist das tolle Login- und Accountmanagementsystem.
@@ -70,33 +79,35 @@ func (c *Charakterin) DisplayLogin(w http.ResponseWriter, r *http.Request) {
         c.DisplayLoginWithData(w, r, make(map[string]interface{}))
 }
 
-// Login versucht einen User einzuloggen.
+// LoginRequest versucht, einen Benutzer mit den gegebenen Daten einzuloggen.
+func (c *Charakterin) LoginRequest(username, password string) (string, error) {
+        var result string
+        err := c.Database.QueryRow("SELECT * FROM login.new_session($1, $2)", username, password).Scan(&result)
+        if err != nil {
+                return "", err
+        }
+        return result, nil
+}
+
+// Login versucht einen User durch einen Request einzuloggen.
 func (c *Charakterin) Login(w http.ResponseWriter, r *http.Request) {
         if r.Method != "POST" {
                 return
         }
 
         // POST-Data lesen
-        defer r.Body.Close()
-        data, err := ioutil.ReadAll(r.Body)
-        if err != nil {
-                http.Error(w, err.Error(), http.StatusInternalServerError)
-                return
-        }
-
-        values, err := url.ParseQuery(string(data))
+        values, err := readBody(r)
         if err != nil {
                 http.Error(w, err.Error(), http.StatusInternalServerError)
                 return
         }
 
         username := values.Get("username")
-        var result string
-        err = c.Database.QueryRow("SELECT * FROM login.new_session($1, $2)", username, values.Get("password")).Scan(&result)
+        session, err := c.LoginRequest(username, values.Get("password"))
         if err != nil {
                 errStr := err.Error()
 
-                if errStr == "pq: no_such_user" || errStr == "pq: invalid_password" {
+                if errStr == NoSuchUser || errStr == InvalidPassword {
                         log.Printf("invalid login attempt by '%s': %s\n", username, errStr[4:])
                         data := make(map[string]interface{})
                         data["previous_user"] = username
@@ -111,7 +122,7 @@ func (c *Charakterin) Login(w http.ResponseWriter, r *http.Request) {
 
         http.SetCookie(w, &http.Cookie{
                 Name:    "session",
-                Value:   result,
+                Value:   session,
                 Expires: time.Now().AddDate(1, 0, 0),
         })
         http.Redirect(w, r, c.FallbackRoute, 302)
@@ -119,32 +130,37 @@ func (c *Charakterin) Login(w http.ResponseWriter, r *http.Request) {
 
 // Logout loggt einen Charakter aus. Wird direkt über den Request gehandlet.
 func (c *Charakterin) Logout(w http.ResponseWriter, r *http.Request) {
-        user, err := c.GetUserFromRequest(r)
+        cookie, err := r.Cookie("session")
         if err != nil {
                 http.Redirect(w, r, c.FallbackRoute, 302)
                 return
         }
-        
+
         stmt, err := c.Database.Prepare("DELETE FROM login.sessions WHERE id=$1")
         if err != nil {
                 http.Error(w, "500", http.StatusInternalServerError)
                 return
         }
-        
-        result, err := stmt.Exec(user.SessionID)
+
+        result, err := stmt.Exec(cookie.Value)
         if err != nil {
                 log.Println(err)
                 http.Error(w, "500", http.StatusInternalServerError)
                 return
         }
-        
+
         if val, err := result.RowsAffected(); err != nil || val == 0 {
-                log.Println("could not remove session",user.SessionID,err)
+                log.Println("could not remove session", cookie.Value, err)
                 http.Redirect(w, r, c.FallbackRoute, 302)
                 return
         }
-        
-        user.Logout(w)
+
+        http.SetCookie(w, &http.Cookie{
+                Name:    "session",
+                Value:   "benis",
+                Expires: time.Now(),
+                MaxAge:  0,
+        })
         http.Redirect(w, r, c.FallbackRoute, 302)
 }
 
@@ -165,6 +181,96 @@ func (c *Charakterin) IsLoggedIn(r *http.Request) bool {
         return true
 }
 
+// DisplayRegistrationWithData rendert die Registration mit Daten (vorheriger Benutzer, Fehlermeldung)
+func (c *Charakterin) DisplayRegistrationWithData(w http.ResponseWriter, r *http.Request, data map[string]interface{}) {
+        if c.IsLoggedIn(r) {
+                http.Redirect(w, r, c.FallbackRoute, 302)
+                return
+        }
+
+        if c.renderer == nil {
+                log.Println("charakterin: no renderer set")
+                return
+        }
+
+        if _, ok := data["previous_user"]; !ok {
+                data["previous_user"] = ""
+        }
+        if _, ok := data["previous_email"]; !ok {
+                data["previous_email"] = ""
+        }
+        if _, ok := data["error"]; !ok {
+                data["error"] = ""
+        }
+
+        c.renderer.RenderRegistrationPage(w, data)
+}
+
+// DisplayRegistration zeigt die Route für die Registration an, wenn der User nicht bereits eingeloggt ist.
+func (c *Charakterin) DisplayRegistration(w http.ResponseWriter, r *http.Request) {
+        c.DisplayRegistrationWithData(w, r, make(map[string]interface{}))
+}
+
+// Register versucht einen Benutzer zu registrieren.
+func (c *Charakterin) Register(w http.ResponseWriter, r *http.Request) {
+        if r.Method != "POST" {
+                return
+        }
+
+        // POST-Data lesen
+        values, err := readBody(r)
+        if err != nil {
+                http.Error(w, err.Error(), http.StatusInternalServerError)
+                return
+        }
+
+        username := values.Get("username")
+        password := values.Get("password")
+        email := values.Get("email")
+        var result string
+        err = c.Database.QueryRow("SELECT * FROM login.register_user($1, $2, $3)", username, password, email).Scan(&result)
+        if err != nil {
+                errStr := err.Error()
+
+                if errStr == UsernameTaken {
+                        data := make(map[string]interface{})
+                        data["error"] = "Der Benutzername wird bereits verwendet."
+                        data["previous_email"] = email
+                        c.DisplayLoginWithData(w, r, data)
+                        return
+                } else if errStr == EmailAlreadyRegistered {
+                        data := make(map[string]interface{})
+                        data["error"] = "Diese E-Mail wird bereits verwendet."
+                        data["previous_user"] = username
+                        c.DisplayLoginWithData(w, r, data)
+                        return
+                }
+
+                http.Error(w, errStr, http.StatusInternalServerError)
+                return
+        }
+
+        log.Printf("user '%s' has been registered.\n", username)
+        if err := c.ConfirmEmail(result); err != nil {
+                log.Println("could not activate user", err)
+                http.Error(w, "user created, could not activate", http.StatusInternalServerError)
+                return
+        }
+        session, err := c.LoginRequest(username, password)
+        if err != nil {
+                log.Println("failed auto-login for", username, err)
+                http.Redirect(w, r, c.FallbackRoute, 302)
+                return
+        }
+
+        http.SetCookie(w, &http.Cookie{
+                Name:    "session",
+                Value:   session,
+                Expires: time.Now().AddDate(1, 0, 0),
+        })
+        http.Redirect(w, r, c.FallbackRoute, 302)
+}
+
 func (c *Charakterin) GetUserFromRequest(r *http.Request) (*User, error) {
         cookie, err := r.Cookie("session")
         if err != nil {
@@ -176,7 +282,8 @@ func (c *Charakterin) GetUserFromRequest(r *http.Request) (*User, error) {
         var password []byte
         var id int
         var lastActivity time.Time
-        err = c.Database.QueryRow(`SELECT * FROM login.get_user_by_session($1)`, cookie.Value).Scan(&id, &email, &name, &password, &displayName, &lastActivity)
+        var isActive bool
+        err = c.Database.QueryRow(`SELECT id, email, name, password, display_name, last_activity, is_active FROM login.get_user_by_session($1)`, cookie.Value).Scan(&id, &email, &name, &password, &displayName, &lastActivity, &isActive)
         if err != nil {
                 return nil, err
         }
@@ -193,8 +300,34 @@ func (c *Charakterin) GetUserFromRequest(r *http.Request) (*User, error) {
                 password,
                 dspName,
                 lastActivity,
-                cookie.Value,
+                isActive,
         }
 
         return user, nil
 }
+
+// ConfirmEmail konfirmiert die email addresse mit der gegebenen confirm id.
+func (c *Charakterin) ConfirmEmail(confirmId string) error {
+        var result string
+        err := c.Database.QueryRow(`SELECT * FROM login.confirm_user_email($1)`, confirmId).Scan(&result)
+        if err != nil {
+                return err
+        }
+
+        return nil
+}
+
+func readBody(r *http.Request) (url.Values, error) {
+        defer r.Body.Close()
+        data, err := ioutil.ReadAll(r.Body)
+        if err != nil {
+                return nil, err
+        }
+
+        values, err := url.ParseQuery(string(data))
+        if err != nil {
+                return nil, err
+        }
+
+        return values, nil
+}
diff --git a/user.go b/user.go
index 1546c6b..909859e 100644
--- a/user.go
+++ b/user.go
@@ -2,7 +2,6 @@ package charakterin
 
 import (
         "time"
-        "net/http"
 )
 
 // Ein User ist ein ganz toller Benutzer.
@@ -13,7 +12,7 @@ type User struct {
         Password     []byte
         DisplayName  string
         LastActivity time.Time
-        SessionID       string
+        IsActive     bool
 }
 
 // GetName gibt den Anzeigenamen oder wenn dieser nicht gesetzt ist den Benutzernamen zurück.
@@ -23,13 +22,3 @@ func (u *User) GetName() string {
         }
         return u.Name
 }
-
-func (u *User) Logout(w http.ResponseWriter) {
-        http.SetCookie(w, &http.Cookie{
-                Name: "session",
-                Value: "benis",
-                Expires: time.Now(),
-                MaxAge: 0,
-        })
-        return
-}
\ No newline at end of file