rig-memvid 0.1.3

//! Error types for `rig-memvid`.

use rig::vector_store::{VectorStoreError, request::FilterError};

/// Errors produced by `rig-memvid`.
#[derive(Debug, thiserror::Error)]
pub enum MemvidError {
    /// Underlying memvid-core failure.
    #[error("memvid error: {0}")]
    Memvid(#[from] memvid_core::MemvidError),

    /// I/O error while opening, creating, or locking a memvid file.
    #[error("i/o error: {0}")]
    Io(#[from] std::io::Error),

    /// Serde failure while round-tripping a hit into the caller's document
    /// type, or while encoding metadata into JSON for storage.
    #[error("serialization error: {0}")]
    Serde(#[from] serde_json::Error),

    /// A filter clause was constructed that memvid cannot represent (for
    /// example a `gt`/`lt` predicate, an `or` combination, or an `eq` against
    /// an unknown key).
    #[error("unsupported filter clause: {0}")]
    UnsupportedFilter(String),

    /// The store's mutex was poisoned by a previous panic.
    #[error("memvid store mutex poisoned")]
    Poisoned,
}

impl From<MemvidError> for VectorStoreError {
    /// Map a [`MemvidError`] onto the closest [`VectorStoreError`] variant
    /// so rig consumers can inspect failures without downcasting through
    /// the generic `DatastoreError` boxed trait object.
    ///
    /// Note: [`MemvidError::Memvid`], [`MemvidError::Io`], and
    /// [`MemvidError::Poisoned`] all collapse into
    /// [`VectorStoreError::DatastoreError`]; downstream callers that need
    /// to distinguish them should match on the boxed source via
    /// `Error::downcast_ref::<MemvidError>()`.
    fn from(err: MemvidError) -> Self {
        match err {
            MemvidError::Serde(e) => VectorStoreError::JsonError(e),
            MemvidError::UnsupportedFilter(msg) => {
                VectorStoreError::FilterError(FilterError::TypeError(msg))
            }
            other => VectorStoreError::DatastoreError(Box::new(other)),
        }
    }
}