uqa-core 0.4.0

Document sets, finite-support relations, posting storage, and value types for UQA
Documentation 
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//
// Unified Query Algebra
//
// Copyright (c) 2023-2026 Cognica, Inc.
//

//! Durable table-shaped ownership and ACL data, independent of SQL binding.

use super::{TableAclEntry, TablePrivileges};
use crate::catalog_role::{BoundAclEntry, RoleIdentity};
use serde::{Deserialize, Serialize};
use std::collections::BTreeMap;

/// Replacement identities of independently writable relation and attribute ACL tuples.
#[derive(Debug, Clone, Default, PartialEq, Eq, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct RelationAclRevisions {
    pub relation: Option<[u8; 16]>,
    pub columns: BTreeMap<String, [u8; 16]>,
}

impl RelationAclRevisions {
    pub fn is_empty(&self) -> bool {
        self.relation.is_none() && self.columns.is_empty()
    }

    pub fn get(&self, column: Option<&str>) -> Option<[u8; 16]> {
        column.map_or(self.relation, |column| self.columns.get(column).copied())
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct BoundRelationSecurity {
    pub role_owner: RoleIdentity,
    /// Explicit null preserves the owner-only default ACL; an absent current field is invalid.
    #[serde(deserialize_with = "Deserialize::deserialize")]
    pub acl: Option<Vec<BoundAclEntry<TablePrivileges>>>,
    pub column_acls: BTreeMap<String, Vec<BoundAclEntry<TablePrivileges>>>,
    /// Loaded from independent ACL records, never embedded in a relation definition.
    #[serde(skip)]
    pub acl_revisions: RelationAclRevisions,
}

impl BoundRelationSecurity {
    pub fn owner(role_owner: RoleIdentity) -> Self {
        Self {
            role_owner,
            acl: None,
            column_acls: BTreeMap::new(),
            acl_revisions: RelationAclRevisions::default(),
        }
    }
}

/// Names are accepted only as an input to initial catalog restoration.
#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
#[serde(deny_unknown_fields)]
pub struct LegacyRelationSecurity {
    pub role_owner: String,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub acl: Option<Vec<TableAclEntry>>,
    #[serde(default, skip_serializing_if = "BTreeMap::is_empty")]
    pub column_acls: BTreeMap<String, Vec<TableAclEntry>>,
}

impl LegacyRelationSecurity {
    pub fn owner(role_owner: impl Into<String>) -> Self {
        Self {
            role_owner: role_owner.into(),
            acl: None,
            column_acls: BTreeMap::new(),
        }
    }
}