memvid-core 2.0.139

Core library for Memvid v2, a crash-safe, deterministic, single-file AI memory.
Documentation 
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use tantivy::Index;
use tantivy::schema::{IndexRecordOption, NumericOptions, STRING, Schema, TEXT, TextFieldIndexing};
use tantivy::tokenizer::{
    Language, LowerCaser, RawTokenizer, SimpleTokenizer, Stemmer, TextAnalyzer,
};

pub(super) fn initialise_tokenizer(index: &Index) {
    let analyzer = TextAnalyzer::builder(SimpleTokenizer::default())
        .filter(LowerCaser)
        .filter(Stemmer::new(Language::English))
        .build();
    index.tokenizers().register("memvid_default", analyzer);
    index.tokenizers().register("raw", RawTokenizer::default());
}

pub(super) fn build_schema() -> Schema {
    let mut schema_builder = tantivy::schema::SchemaBuilder::default();

    let content_options = TextFieldIndexing::default()
        .set_tokenizer("memvid_default")
        .set_index_option(IndexRecordOption::WithFreqsAndPositions);
    let content_field = TEXT.set_stored().set_indexing_options(content_options);
    schema_builder.add_text_field("content", content_field);

    let keyword_indexing = TextFieldIndexing::default()
        .set_tokenizer("memvid_default")
        .set_index_option(IndexRecordOption::Basic);
    let keyword_field = STRING
        .set_stored()
        .set_indexing_options(keyword_indexing.clone());
    schema_builder.add_text_field("tags", keyword_field.clone());
    schema_builder.add_text_field("labels", keyword_field.clone());
    schema_builder.add_text_field("track", keyword_field);

    let uri_indexing = TextFieldIndexing::default()
        .set_tokenizer("raw")
        .set_index_option(IndexRecordOption::Basic);
    let uri_field = STRING.set_stored().set_indexing_options(uri_indexing);
    schema_builder.add_text_field("uri", uri_field);

    let timestamp_options = NumericOptions::default()
        .set_indexed()
        .set_fast()
        .set_stored();
    schema_builder.add_i64_field("timestamp", timestamp_options);

    let frame_id_options = NumericOptions::default().set_indexed().set_stored();
    schema_builder.add_u64_field("frame_id", frame_id_options);

    schema_builder.build()
}