Function retrieve_average_document_length

src/models/meta_persist.rs:252–274

(lmdb: &MetaDb)

}

pub fn retrieve_average_document_length(lmdb: &MetaDb) -> Result<Option<f32>, WaCustomError> {
    let env = lmdb.env.clone();
    let db = lmdb.db;
    let txn = env
        .begin_ro_txn()
        .map_err(|e| WaCustomError::DatabaseError(format!("Failed to begin transaction: {}", e)))?;
    let key = key!(m:average_document_length);

    let serialized = match txn.get(db, &key) {
        Ok(bytes) => bytes,
        Err(lmdb::Error::NotFound) => return Ok(None),
        Err(e) => return Err(WaCustomError::DatabaseError(e.to_string())),
    };

    let bytes: [u8; 4] = serialized.try_into().map_err(|_| {
        WaCustomError::DeserializationError(
            "Failed to deserialize average document length: length mismatch".to_string(),
        )
    })?;
    let len = f32::from_le_bytes(bytes);

    Ok(Some(len))
}

pub fn retrieve_highest_internal_id(lmdb: &MetaDb) -> Result<Option<u32>, WaCustomError> {
    let env = lmdb.env.clone();