icydb_core/

lib.rs

//! Module: lib
//! Responsibility: crate root for the IcyDB core runtime surface.
//! Does not own: canister-facing facade APIs from the public `icydb` crate.
//! Boundary: exposes the engine subsystems used by schema, query, executor, and storage layers.

//! Core runtime for IcyDB: entity traits, values, executors, visitors, and
//! the ergonomics exported via the `prelude`.
#![warn(unreachable_pub)] // too complex to adhere to right now

extern crate self as icydb;

#[macro_use]
pub(crate) mod scalar_registry;

// public exports are one module level down
pub mod db;
pub mod error;
pub mod metrics;
pub mod model;
pub mod sanitize;
pub mod traits;
pub mod types;
pub mod validate;
pub mod value;
pub mod visitor;

// testing
#[cfg(test)]
pub(crate) mod testing;

///
/// CONSTANTS
///

/// Maximum number of indexed fields allowed on an entity.
///
/// This limit keeps hashed index keys within bounded, storable sizes and
/// simplifies sizing tests in the stores.
pub const MAX_INDEX_FIELDS: usize = 4;

///
/// Prelude
///
/// Prelude contains only domain vocabulary.
/// No errors, executors, stores, serializers, or helpers are re-exported here.
///

pub mod prelude {
    pub use crate::{
        model::{entity::EntityModel, index::IndexModel},
        traits::{EntityKind, Path},
        value::{InputValue, OutputValue},
    };
}

// Macro/runtime wiring surface used by generated code in local core tests.
// This mirrors the facade crate's hidden generated-code boundary so derive
// output can target one stable path regardless of which workspace crate owns
// the test harness.
#[doc(hidden)]
pub mod __macro {
    pub use crate::db::{
        GeneratedStructuralEnumPayload, GeneratedStructuralMapPayloadSlices, PersistedScalar,
        ScalarSlotValueRef, ScalarValueRef,
    };
    pub use crate::error::InternalError;
    pub use crate::traits::{
        EnumValue, FieldProjection, PersistedByKindCodec, PersistedFieldMetaCodec,
        PersistedFieldSlotCodec, PersistedStructuredFieldCodec, RuntimeValueDecode,
        RuntimeValueEncode, RuntimeValueKind, RuntimeValueMeta, runtime_value_btree_map_from_value,
        runtime_value_btree_set_from_value, runtime_value_collection_to_value,
        runtime_value_from_value, runtime_value_from_vec_into,
        runtime_value_from_vec_into_btree_map, runtime_value_from_vec_into_btree_set,
        runtime_value_into, runtime_value_map_collection_to_value, runtime_value_to_value,
        runtime_value_vec_from_value,
    };
    pub use crate::value::{InputValue, Value, ValueEnum};

    #[doc(hidden)]
    #[must_use]
    pub fn encode_generated_structural_text_payload_bytes(value: &str) -> Vec<u8> {
        crate::db::encode_generated_structural_text_payload_bytes(value)
    }

    #[doc(hidden)]
    #[must_use]
    pub fn encode_generated_structural_list_payload_bytes(items: &[&[u8]]) -> Vec<u8> {
        crate::db::encode_generated_structural_list_payload_bytes(items)
    }

    #[doc(hidden)]
    #[must_use]
    pub fn encode_generated_structural_map_payload_bytes(entries: &[(&[u8], &[u8])]) -> Vec<u8> {
        crate::db::encode_generated_structural_map_payload_bytes(entries)
    }

    #[doc(hidden)]
    #[must_use]
    pub fn encode_generated_structural_enum_payload_bytes(
        variant: &str,
        path: Option<&str>,
        payload: Option<&[u8]>,
    ) -> Vec<u8> {
        crate::db::encode_generated_structural_enum_payload_bytes(variant, path, payload)
    }

    #[doc(hidden)]
    pub fn decode_generated_structural_text_payload_bytes(
        raw_bytes: &[u8],
    ) -> Result<String, crate::error::InternalError> {
        crate::db::decode_generated_structural_text_payload_bytes(raw_bytes)
    }

    #[doc(hidden)]
    pub fn decode_generated_structural_list_payload_bytes(
        raw_bytes: &[u8],
    ) -> Result<Vec<&[u8]>, crate::error::InternalError> {
        crate::db::decode_generated_structural_list_payload_bytes(raw_bytes)
    }

    #[doc(hidden)]
    pub fn decode_generated_structural_map_payload_bytes(
        raw_bytes: &[u8],
    ) -> Result<crate::db::GeneratedStructuralMapPayloadSlices<'_>, crate::error::InternalError>
    {
        crate::db::decode_generated_structural_map_payload_bytes(raw_bytes)
    }

    #[doc(hidden)]
    pub fn decode_generated_structural_enum_payload_bytes(
        raw_bytes: &[u8],
    ) -> Result<crate::db::GeneratedStructuralEnumPayload<'_>, crate::error::InternalError> {
        crate::db::decode_generated_structural_enum_payload_bytes(raw_bytes)
    }

    #[doc(hidden)]
    pub fn generated_persisted_structured_payload_decode_failed(
        detail: impl std::fmt::Display,
    ) -> crate::error::InternalError {
        crate::db::generated_persisted_structured_payload_decode_failed(detail)
    }

    #[doc(hidden)]
    pub fn encode_persisted_structured_many_slot_payload<T>(
        value: &[T],
        field_name: &'static str,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: crate::traits::PersistedStructuredFieldCodec,
    {
        crate::db::encode_persisted_structured_many_slot_payload(value, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_structured_many_slot_payload<T>(
        bytes: &[u8],
        field_name: &'static str,
    ) -> Result<Vec<T>, crate::error::InternalError>
    where
        T: crate::traits::PersistedStructuredFieldCodec,
    {
        crate::db::decode_persisted_structured_many_slot_payload(bytes, field_name)
    }

    #[doc(hidden)]
    pub fn encode_persisted_structured_slot_payload<T>(
        value: &T,
        field_name: &'static str,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: crate::traits::PersistedStructuredFieldCodec,
    {
        crate::db::encode_persisted_structured_slot_payload(value, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_structured_slot_payload<T>(
        bytes: &[u8],
        field_name: &'static str,
    ) -> Result<T, crate::error::InternalError>
    where
        T: crate::traits::PersistedStructuredFieldCodec,
    {
        crate::db::decode_persisted_structured_slot_payload(bytes, field_name)
    }

    #[doc(hidden)]
    pub fn encode_persisted_option_scalar_slot_payload<T>(
        value: &Option<T>,
        field_name: &'static str,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: PersistedScalar,
    {
        crate::db::encode_persisted_option_scalar_slot_payload(value, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_option_scalar_slot_payload<T>(
        bytes: &[u8],
        field_name: &'static str,
    ) -> Result<Option<T>, crate::error::InternalError>
    where
        T: PersistedScalar,
    {
        crate::db::decode_persisted_option_scalar_slot_payload(bytes, field_name)
    }

    #[doc(hidden)]
    pub fn encode_persisted_scalar_slot_payload<T>(
        value: &T,
        field_name: &'static str,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: PersistedScalar,
    {
        crate::db::encode_persisted_scalar_slot_payload(value, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_scalar_slot_payload<T>(
        bytes: &[u8],
        field_name: &'static str,
    ) -> Result<T, crate::error::InternalError>
    where
        T: PersistedScalar,
    {
        crate::db::decode_persisted_scalar_slot_payload(bytes, field_name)
    }

    #[doc(hidden)]
    pub fn encode_persisted_slot_payload_by_kind<T>(
        value: &T,
        kind: crate::model::field::FieldKind,
        field_name: &'static str,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: crate::traits::PersistedByKindCodec,
    {
        crate::db::encode_persisted_slot_payload_by_kind(value, kind, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_slot_payload_by_kind<T>(
        bytes: &[u8],
        kind: crate::model::field::FieldKind,
        field_name: &'static str,
    ) -> Result<T, crate::error::InternalError>
    where
        T: crate::traits::PersistedByKindCodec,
    {
        crate::db::decode_persisted_slot_payload_by_kind(bytes, kind, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_option_slot_payload_by_kind<T>(
        bytes: &[u8],
        kind: crate::model::field::FieldKind,
        field_name: &'static str,
    ) -> Result<Option<T>, crate::error::InternalError>
    where
        T: crate::traits::PersistedByKindCodec,
    {
        crate::db::decode_persisted_option_slot_payload_by_kind(bytes, kind, field_name)
    }

    #[doc(hidden)]
    pub fn encode_persisted_option_slot_payload_by_meta<T>(
        value: &Option<T>,
        field_name: &'static str,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: crate::traits::PersistedFieldMetaCodec,
    {
        crate::db::encode_persisted_option_slot_payload_by_meta(value, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_option_slot_payload_by_meta<T>(
        bytes: &[u8],
        field_name: &'static str,
    ) -> Result<Option<T>, crate::error::InternalError>
    where
        T: crate::traits::PersistedFieldMetaCodec,
    {
        crate::db::decode_persisted_option_slot_payload_by_meta(bytes, field_name)
    }

    #[doc(hidden)]
    pub fn encode_persisted_many_slot_payload_by_meta<T>(
        value: &[T],
        field_name: &'static str,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: crate::traits::FieldTypeMeta + crate::traits::RuntimeValueEncode,
    {
        crate::db::encode_persisted_many_slot_payload_by_meta(value, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_many_slot_payload_by_meta<T>(
        bytes: &[u8],
        field_name: &'static str,
    ) -> Result<Vec<T>, crate::error::InternalError>
    where
        T: crate::traits::FieldTypeMeta + crate::traits::RuntimeValueDecode,
    {
        crate::db::decode_persisted_many_slot_payload_by_meta(bytes, field_name)
    }

    #[doc(hidden)]
    pub fn encode_persisted_slot_payload_by_meta<T>(
        value: &T,
        field_name: &'static str,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: crate::traits::PersistedFieldMetaCodec,
    {
        crate::db::encode_persisted_slot_payload_by_meta(value, field_name)
    }

    #[doc(hidden)]
    pub fn decode_persisted_slot_payload_by_meta<T>(
        bytes: &[u8],
        field_name: &'static str,
    ) -> Result<T, crate::error::InternalError>
    where
        T: crate::traits::PersistedFieldMetaCodec,
    {
        crate::db::decode_persisted_slot_payload_by_meta(bytes, field_name)
    }

    #[doc(hidden)]
    pub fn encode_schema_runtime_field_slot<T>(
        model: &'static crate::model::entity::EntityModel,
        slot: usize,
        value: &T,
    ) -> Result<Vec<u8>, crate::error::InternalError>
    where
        T: ?Sized + crate::traits::RuntimeValueEncode,
    {
        let runtime_value = value.to_value();

        crate::db::encode_runtime_value_into_slot(model, slot, &runtime_value)
    }

    #[doc(hidden)]
    pub fn decode_schema_runtime_field_slot<T>(
        model: &'static crate::model::entity::EntityModel,
        slot: usize,
        bytes: &[u8],
        field_name: &'static str,
    ) -> Result<T, crate::error::InternalError>
    where
        T: crate::traits::RuntimeValueDecode,
    {
        let runtime_value = crate::db::decode_slot_into_runtime_value(model, slot, bytes)?;

        T::from_value(&runtime_value).ok_or_else(|| {
            crate::error::InternalError::persisted_row_field_decode_failed(
                field_name,
                format!("payload does not match {}", std::any::type_name::<T>()),
            )
        })
    }
}