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config.go
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config.go
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package grafana
import (
"errors"
"fmt"
"strings"
"github.com/go-playground/validator/v10"
"github.com/goto/guardian/domain"
"github.com/mitchellh/mapstructure"
)
const (
DashboardRoleViewer = "view"
DashboardRoleEditor = "edit"
DashboardRoleAdmin = "admin"
AccountTypeUser = "user"
)
type Credentials struct {
Host string `json:"host" mapstructure:"host" validate:"required,url"`
Username string `json:"username" mapstructure:"username" validate:"required"`
Password string `json:"password" mapstructure:"password" validate:"required"`
}
func (c *Credentials) Encrypt(encryptor domain.Encryptor) error {
if c == nil {
return ErrUnableToEncryptNilCredentials
}
encryptedPassword, err := encryptor.Encrypt(c.Password)
if err != nil {
return err
}
c.Password = encryptedPassword
return nil
}
func (c *Credentials) Decrypt(decryptor domain.Decryptor) error {
if c == nil {
return ErrUnableToDecryptNilCredentials
}
decryptedPassword, err := decryptor.Decrypt(c.Password)
if err != nil {
return err
}
c.Password = decryptedPassword
return nil
}
var permissionCodes = map[string]int{
"view": 1,
"edit": 2,
"admin": 4,
}
type Permission string
type Config struct {
ProviderConfig *domain.ProviderConfig
valid bool
crypto domain.Crypto
validator *validator.Validate
}
func NewConfig(pc *domain.ProviderConfig, crypto domain.Crypto) *Config {
return &Config{
ProviderConfig: pc,
validator: validator.New(),
crypto: crypto,
}
}
func (c *Config) ParseAndValidate() error {
return c.parseAndValidate()
}
func (c *Config) EncryptCredentials() error {
if err := c.parseAndValidate(); err != nil {
return err
}
credentials, ok := c.ProviderConfig.Credentials.(*Credentials)
if !ok {
return ErrInvalidCredentials
}
if err := credentials.Encrypt(c.crypto); err != nil {
return err
}
c.ProviderConfig.Credentials = credentials
return nil
}
func (c *Config) parseAndValidate() error {
if c.valid {
return nil
}
validationErrors := []error{}
if credentials, err := c.validateCredentials(c.ProviderConfig.Credentials); err != nil {
validationErrors = append(validationErrors, err)
} else {
c.ProviderConfig.Credentials = credentials
}
for _, r := range c.ProviderConfig.Resources {
if err := c.validateResourceConfig(r); err != nil {
validationErrors = append(validationErrors, err)
}
}
if len(validationErrors) > 0 {
errorStrings := []string{}
for _, err := range validationErrors {
errorStrings = append(errorStrings, err.Error())
}
return errors.New(strings.Join(errorStrings, "\n"))
}
c.valid = true
return nil
}
func (c *Config) validateCredentials(value interface{}) (*Credentials, error) {
var credentials Credentials
if err := mapstructure.Decode(value, &credentials); err != nil {
return nil, err
}
if err := c.validator.Struct(credentials); err != nil {
return nil, err
}
return &credentials, nil
}
func (c *Config) validateResourceConfig(resource *domain.ResourceConfig) error {
resourceTypeValidation := fmt.Sprintf("oneof=%s %s", ResourceTypeFolder, ResourceTypeDashboard)
if err := c.validator.Var(resource.Type, resourceTypeValidation); err != nil {
return err
}
for _, role := range resource.Roles {
for i, permission := range role.Permissions {
if permissionConfig, err := c.validatePermission(resource.Type, permission); err != nil {
return err
} else {
role.Permissions[i] = permissionConfig
}
}
}
return nil
}
func (c *Config) validatePermission(resourceType string, value interface{}) (*Permission, error) {
permissionConfig, ok := value.(string)
if !ok {
return nil, ErrInvalidPermissionConfig
}
var pc Permission
if err := mapstructure.Decode(permissionConfig, &pc); err != nil {
return nil, err
}
var nameValidation string
if resourceType == ResourceTypeFolder {
nameValidation = "oneof=view edit admin"
} else if resourceType == ResourceTypeDashboard {
nameValidation = "oneof=view edit admin"
}
if err := c.validator.Var(pc, nameValidation); err != nil {
return nil, err
}
return &pc, nil
}