uqa-sql 0.4.0

PostgreSQL-compatible SQL compiler built on libpg_query
Documentation 
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//
// Unified Query Algebra
//
// Copyright (c) 2023-2026 Cognica, Inc.
//

//! Database ownership and ACL references retain role incarnations independently of names.

use super::super::role_bindings;
use super::{DatabaseAclEntry, DatabasePrivileges, DatabaseSecurity};
use crate::catalog::roles::{RoleDefinition, RoleIdentity};
use serde::{Deserialize, Serialize};
use std::collections::BTreeMap;
use uqa_core::catalog_acl::AclGrantee;

pub type BoundDatabaseAclEntry = uqa_core::catalog_role::BoundAclEntry<DatabasePrivileges>;

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct BoundDatabaseSecurity {
    pub role_owner: RoleIdentity,
    pub acl: Option<Vec<BoundDatabaseAclEntry>>,
}

fn role_name(
    roles: &BTreeMap<String, RoleDefinition>,
    identity: RoleIdentity,
) -> Result<&str, String> {
    role_bindings::role_name(roles, identity, "database")
}

impl BoundDatabaseSecurity {
    pub fn bootstrap() -> Self {
        Self {
            role_owner: RoleDefinition::bootstrap().identity(),
            acl: None,
        }
    }

    pub fn depends_on(&self, role: RoleIdentity) -> bool {
        self.role_owner == role
            || self.acl.as_ref().is_some_and(|entries| {
                entries
                    .iter()
                    .any(|entry| entry.role == Some(role) || entry.grantor == role)
            })
    }

    pub fn validate(&self, roles: &BTreeMap<String, RoleDefinition>) -> Result<(), String> {
        role_name(roles, self.role_owner)?;
        for entry in self.acl.iter().flatten() {
            if let Some(grantee) = entry.role {
                role_name(roles, grantee)?;
            }
            role_name(roles, entry.grantor)?;
        }
        Ok(())
    }

    pub fn bind(
        security: &DatabaseSecurity,
        roles: &BTreeMap<String, RoleDefinition>,
    ) -> Result<Self, String> {
        super::validate_stored_database_security(security, roles)?;
        let bind = |name: &str| role_bindings::bind_role(roles, name, "database");
        Ok(Self {
            role_owner: bind(&security.role_owner)?,
            acl: security
                .acl
                .as_ref()
                .map(|entries| {
                    entries
                        .iter()
                        .map(|entry| {
                            Ok(BoundDatabaseAclEntry {
                                role: entry.role.role_name().map(bind).transpose()?,
                                grantor: bind(
                                    entry.grantor.as_deref().unwrap_or(&security.role_owner),
                                )?,
                                privileges: entry.privileges,
                                grant_options: entry.grant_options,
                            })
                        })
                        .collect::<Result<Vec<_>, String>>()
                })
                .transpose()?,
        })
    }

    /// Project current names without rewriting or rebinding the stored references.
    pub fn resolve(
        &self,
        roles: &BTreeMap<String, RoleDefinition>,
    ) -> Result<DatabaseSecurity, String> {
        let name = |identity| role_name(roles, identity).map(str::to_owned);
        Ok(DatabaseSecurity {
            role_owner: name(self.role_owner)?,
            acl: self
                .acl
                .as_ref()
                .map(|entries| {
                    entries
                        .iter()
                        .map(|entry| {
                            Ok(DatabaseAclEntry {
                                role: entry
                                    .role
                                    .map(&name)
                                    .transpose()?
                                    .map_or(AclGrantee::Public, AclGrantee::Role),
                                grantor: Some(name(entry.grantor)?),
                                privileges: entry.privileges,
                                grant_options: entry.grant_options,
                            })
                        })
                        .collect::<Result<Vec<_>, String>>()
                })
                .transpose()?,
        })
    }
}

#[cfg(test)]
mod tests;