Rest API reorganization (#3624)

* reorg API

* reorg api

* fix system route

* remove newline

Co-authored-by: Mattermod <mattermod@users.noreply.github.com>

server/model/auth.go

@@ -0,0 +1,129 @@
+package model
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"strings"
+
+	"github.com/mattermost/focalboard/server/services/auth"
+)
+
+const (
+	MinimumPasswordLength = 8
+)
+
+type AuthParamError struct {
+	msg string
+}
+
+func (pe AuthParamError) Error() string {
+	return pe.msg
+}
+
+// LoginRequest is a login request
+// swagger:model
+type LoginRequest struct {
+	// Type of login, currently must be set to "normal"
+	// required: true
+	Type string `json:"type"`
+
+	// If specified, login using username
+	// required: false
+	Username string `json:"username"`
+
+	// If specified, login using email
+	// required: false
+	Email string `json:"email"`
+
+	// Password
+	// required: true
+	Password string `json:"password"`
+
+	// MFA token
+	// required: false
+	// swagger:ignore
+	MfaToken string `json:"mfa_token"`
+}
+
+// LoginResponse is a login response
+// swagger:model
+type LoginResponse struct {
+	// Session token
+	// required: true
+	Token string `json:"token"`
+}
+
+func LoginResponseFromJSON(data io.Reader) (*LoginResponse, error) {
+	var resp LoginResponse
+	if err := json.NewDecoder(data).Decode(&resp); err != nil {
+		return nil, err
+	}
+	return &resp, nil
+}
+
+// RegisterRequest is a user registration request
+// swagger:model
+type RegisterRequest struct {
+	// User name
+	// required: true
+	Username string `json:"username"`
+
+	// User's email
+	// required: true
+	Email string `json:"email"`
+
+	// Password
+	// required: true
+	Password string `json:"password"`
+
+	// Registration authorization token
+	// required: true
+	Token string `json:"token"`
+}
+
+func (rd *RegisterRequest) IsValid() error {
+	if strings.TrimSpace(rd.Username) == "" {
+		return AuthParamError{"username is required"}
+	}
+	if strings.TrimSpace(rd.Email) == "" {
+		return AuthParamError{"email is required"}
+	}
+	if !auth.IsEmailValid(rd.Email) {
+		return AuthParamError{"invalid email format"}
+	}
+	if rd.Password == "" {
+		return AuthParamError{"password is required"}
+	}
+	return isValidPassword(rd.Password)
+}
+
+// ChangePasswordRequest is a user password change request
+// swagger:model
+type ChangePasswordRequest struct {
+	// Old password
+	// required: true
+	OldPassword string `json:"oldPassword"`
+
+	// New password
+	// required: true
+	NewPassword string `json:"newPassword"`
+}
+
+// IsValid validates a password change request.
+func (rd *ChangePasswordRequest) IsValid() error {
+	if rd.OldPassword == "" {
+		return AuthParamError{"old password is required"}
+	}
+	if rd.NewPassword == "" {
+		return AuthParamError{"new password is required"}
+	}
+	return isValidPassword(rd.NewPassword)
+}
+
+func isValidPassword(password string) error {
+	if len(password) < MinimumPasswordLength {
+		return AuthParamError{fmt.Sprintf("password must be at least %d characters", MinimumPasswordLength)}
+	}
+	return nil
+}