Add invite user feature for admin

internal/createuser/createuser.go

@@ -1,6 +1,8 @@
 package createuser
 
 import (
+	"crypto/rand"
+	"encoding/base64"
 	"errors"
 	"fmt"
 	"net/http"
@@ -14,6 +16,31 @@ import (
 	"gorm.io/gorm"
 )
 
+func CreateUserToActivate(ac appcontext.AppContext, username string) (model.User, error) {
+	token := generateRandomToken()
+	user := model.User{
+		Name:        username,
+		Admin:       false,
+		InviteToken: token,
+		Activated:   false,
+	}
+	err := CreateUserWithHashedPassword(ac, &user)
+	return user, err
+}
+
+func generateRandomToken() string {
+	tokenByte := make([]byte, 64)
+	var tokenBuilder strings.Builder
+	rand.Read(tokenByte)
+	encoder := base64.NewEncoder(base64.StdEncoding, &tokenBuilder)
+	encoder.Write(tokenByte)
+	// Must close the encoder when finished to flush any partial blocks.
+	// If you comment out the following line, the last partial block "r"
+	// won't be encoded.
+	encoder.Close()
+	return tokenBuilder.String()
+}
+
 // this method will hash the password
 func CreateUser(ac appcontext.AppContext, username string, password string) error {
 	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
@@ -22,9 +49,10 @@ func CreateUser(ac appcontext.AppContext, username string, password string) erro
 	}
 
 	user := model.User{
-		Name:     username,
-		Password: string(hashedPassword),
-		Admin:    false,
+		Name:      username,
+		Password:  string(hashedPassword),
+		Admin:     false,
+		Activated: true,
 	}
 	return CreateUserWithHashedPassword(ac, &user)
 }
@@ -103,9 +131,10 @@ func createDefaultUsersFromMap(
 		}
 
 		user := model.User{
-			Name:     username,
-			Password: password,
-			Admin:    isAdmin,
+			Name:      username,
+			Password:  password,
+			Admin:     isAdmin,
+			Activated: true,
 		}
 		err = CreateUserWithHashedPassword(ac, &user)
 		if err != nil {