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//! ALTER ROLE statement builder
//!
//! # Examples
//!
//! ```
//! use reinhardt_query::dcl::{AlterRoleStatement, RoleAttribute};
//!
//! let stmt = AlterRoleStatement::new()
//! .role("app_user")
//! .attribute(RoleAttribute::Login)
//! .attribute(RoleAttribute::CreateDb);
//! ```
use super::{RoleAttribute, UserOption, validate_name};
/// ALTER ROLE statement builder
///
/// # Examples
///
/// ```
/// use reinhardt_query::dcl::{AlterRoleStatement, RoleAttribute};
///
/// let stmt = AlterRoleStatement::new()
/// .role("app_user")
/// .attribute(RoleAttribute::CreateDb)
/// .rename_to("new_user");
/// ```
#[derive(Debug, Clone, Default)]
pub struct AlterRoleStatement {
/// Role name to alter
pub role_name: String,
/// PostgreSQL role attributes
pub attributes: Vec<RoleAttribute>,
/// MySQL user options
pub options: Vec<UserOption>,
/// New role name (RENAME TO)
pub rename_to: Option<String>,
}
impl AlterRoleStatement {
/// Create a new empty ALTER ROLE statement
///
/// # Examples
///
/// ```
/// use reinhardt_query::dcl::AlterRoleStatement;
///
/// let stmt = AlterRoleStatement::new();
/// ```
pub fn new() -> Self {
Self::default()
}
/// Set the role name to alter
///
/// # Examples
///
/// ```
/// use reinhardt_query::dcl::AlterRoleStatement;
///
/// let stmt = AlterRoleStatement::new()
/// .role("app_user");
/// ```
pub fn role(mut self, name: impl Into<String>) -> Self {
self.role_name = name.into();
self
}
/// Add a single role attribute
///
/// # Examples
///
/// ```
/// use reinhardt_query::dcl::{AlterRoleStatement, RoleAttribute};
///
/// let stmt = AlterRoleStatement::new()
/// .role("app_user")
/// .attribute(RoleAttribute::Login);
/// ```
pub fn attribute(mut self, attr: RoleAttribute) -> Self {
self.attributes.push(attr);
self
}
/// Set all role attributes at once
///
/// # Examples
///
/// ```
/// use reinhardt_query::dcl::{AlterRoleStatement, RoleAttribute};
///
/// let stmt = AlterRoleStatement::new()
/// .role("app_user")
/// .attributes(vec![RoleAttribute::Login, RoleAttribute::CreateDb]);
/// ```
pub fn attributes(mut self, attrs: Vec<RoleAttribute>) -> Self {
self.attributes = attrs;
self
}
/// Add a single user option (MySQL)
///
/// # Examples
///
/// ```
/// use reinhardt_query::dcl::{AlterRoleStatement, UserOption};
///
/// let stmt = AlterRoleStatement::new()
/// .role("app_user")
/// .option(UserOption::AccountLock);
/// ```
pub fn option(mut self, opt: UserOption) -> Self {
self.options.push(opt);
self
}
/// Set all user options at once (MySQL)
///
/// # Examples
///
/// ```
/// use reinhardt_query::dcl::{AlterRoleStatement, UserOption};
///
/// let stmt = AlterRoleStatement::new()
/// .role("app_user")
/// .options(vec![UserOption::AccountLock, UserOption::PasswordExpire]);
/// ```
pub fn options(mut self, opts: Vec<UserOption>) -> Self {
self.options = opts;
self
}
/// Set the new role name (RENAME TO)
///
/// # Examples
///
/// ```
/// use reinhardt_query::dcl::AlterRoleStatement;
///
/// let stmt = AlterRoleStatement::new()
/// .role("old_user")
/// .rename_to("new_user");
/// ```
pub fn rename_to(mut self, new_name: impl Into<String>) -> Self {
self.rename_to = Some(new_name.into());
self
}
/// Validate the ALTER ROLE statement
///
/// # Validation Rules
///
/// 1. Role name cannot be empty
/// 2. At least one attribute, option, or rename must be specified
///
/// # Examples
///
/// Valid statement:
/// ```
/// use reinhardt_query::dcl::{AlterRoleStatement, RoleAttribute};
///
/// let stmt = AlterRoleStatement::new()
/// .role("app_user")
/// .attribute(RoleAttribute::Login);
///
/// assert!(stmt.validate().is_ok());
/// ```
///
/// Invalid statement (empty role name):
/// ```
/// use reinhardt_query::dcl::AlterRoleStatement;
///
/// let stmt = AlterRoleStatement::new();
/// assert!(stmt.validate().is_err());
/// ```
pub fn validate(&self) -> Result<(), String> {
validate_name(&self.role_name, "Role name")?;
if self.attributes.is_empty() && self.options.is_empty() && self.rename_to.is_none() {
return Err("At least one attribute, option, or rename must be specified".to_string());
}
Ok(())
}
}