59 lines
2.2 KiB
Rust
59 lines
2.2 KiB
Rust
use std::borrow::Cow;
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use std::collections::HashMap;
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use heed::{RwTxn, RoTxn, Result as ZResult, RoRange};
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use sdset::{SetBuf, Set, SetOperation};
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use meilisearch_types::DocumentId;
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use meilisearch_schema::FieldId;
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use crate::database::MainT;
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use crate::facets::FacetKey;
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use super::cow_set::CowSet;
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/// contains facet info
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#[derive(Clone, Copy)]
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pub struct Facets {
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pub(crate) facets: heed::Database<FacetKey, CowSet<DocumentId>>,
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}
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impl Facets {
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// we use sdset::SetBuf to ensure the docids are sorted.
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pub fn put_facet_document_ids(&self, writer: &mut RwTxn<MainT>, facet_key: FacetKey, doc_ids: &Set<DocumentId>) -> ZResult<()> {
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self.facets.put(writer, &facet_key, doc_ids)
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}
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pub fn field_document_ids<'txn>(&self, reader: &'txn RoTxn<MainT>, field_id: FieldId) -> ZResult<RoRange<'txn, FacetKey, CowSet<DocumentId>>> {
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self.facets.prefix_iter(reader, &FacetKey::new(field_id, String::new()))
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}
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pub fn facet_document_ids<'txn>(&self, reader: &'txn RoTxn<MainT>, facet_key: &FacetKey) -> ZResult<Option<Cow<'txn, Set<DocumentId>>>> {
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self.facets.get(reader, &facet_key)
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}
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/// updates the facets store, revmoving the documents from the facets provided in the
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/// `facet_map` argument
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pub fn remove(&self, writer: &mut RwTxn<MainT>, facet_map: HashMap<FacetKey, Vec<DocumentId>>) -> ZResult<()> {
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for (key, document_ids) in facet_map {
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if let Some(old) = self.facets.get(writer, &key)? {
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let to_remove = SetBuf::from_dirty(document_ids);
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let new = sdset::duo::OpBuilder::new(old.as_ref(), to_remove.as_set()).difference().into_set_buf();
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self.facets.put(writer, &key, new.as_set())?;
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}
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}
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Ok(())
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}
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pub fn add(&self, writer: &mut RwTxn<MainT>, facet_map: HashMap<FacetKey, Vec<DocumentId>>) -> ZResult<()> {
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for (key, document_ids) in facet_map {
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let set = SetBuf::from_dirty(document_ids);
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self.put_facet_document_ids(writer, key, set.as_set())?;
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}
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Ok(())
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}
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pub fn clear(self, writer: &mut heed::RwTxn<MainT>) -> ZResult<()> {
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self.facets.clear(writer)
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}
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}
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