victor-db 0.1.2

A browser-optimized vector database
Documentation 
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mod db;
mod decomposition;
mod filesystem;
mod packed_vector;
mod similarity;
mod utils;

#[cfg(test)]
mod tests;

#[cfg(target_arch = "wasm32")]
use {
    wasm_bindgen::prelude::*, wasm_bindgen_futures::JsFuture, web_sys::FileSystemDirectoryHandle,
};

#[cfg(target_arch = "wasm32")]
type Victor = crate::db::Victor<filesystem::web::DirectoryHandle>;

// Native

#[cfg(not(target_arch = "wasm32"))]
pub mod native {
    use crate::db::Victor;

    pub type Db = Victor<crate::filesystem::native::DirectoryHandle>;
}

#[cfg(not(target_arch = "wasm32"))]
pub mod memory {
    use crate::db::Victor;

    pub use crate::filesystem::memory::DirectoryHandle;

    pub type Db = Victor<DirectoryHandle>;
}

// Wasm

#[cfg(target_arch = "wasm32")]
#[allow(unused_macros)]
macro_rules! console_log {
    ($($t:tt)*) => (log(&format_args!($($t)*).to_string()))
}

#[cfg(target_arch = "wasm32")]
#[allow(unused_macros)]
macro_rules! console_warn {
    ($($t:tt)*) => (warn(&format_args!($($t)*).to_string()))
}
#[cfg(target_arch = "wasm32")]
#[wasm_bindgen]
extern "C" {
    #[wasm_bindgen(js_namespace = console)]
    fn log(s: &str);
    #[wasm_bindgen(js_namespace = console)]
    fn warn(s: &str);
}

#[cfg(target_arch = "wasm32")]
#[wasm_bindgen]
pub struct Db {
    victor: crate::db::Victor<filesystem::web::DirectoryHandle>,
}

#[cfg(target_arch = "wasm32")]
#[wasm_bindgen]
impl Db {
    #[wasm_bindgen(constructor)]
    pub async fn new() -> Self {
        utils::set_panic_hook();

        let window = web_sys::window().ok_or(JsValue::NULL).unwrap();
        let navigator = window.navigator();
        let file_system_directory_handle = FileSystemDirectoryHandle::from(
            JsFuture::from(navigator.storage().get_directory())
                .await
                .unwrap(),
        );

        let victor = Victor::new(file_system_directory_handle);

        Self { victor }
    }

    pub async fn insert(&mut self, content: &str, embedding: &[f64], tags: Option<Vec<JsValue>>) {
        let embedding = embedding.iter().map(|x| *x as f32).collect::<Vec<_>>();

        let tags = tags
            .map(|tags| {
                tags.into_iter()
                    .map(|x| x.as_string().unwrap())
                    .collect::<Vec<_>>()
            })
            .unwrap_or(vec![]);

        self.victor.write(content, embedding, tags).await;
    }

    pub async fn search(&mut self, embedding: &[f64], tags: Option<Vec<JsValue>>) -> JsValue {
        let embedding = embedding.iter().map(|x| *x as f32).collect::<Vec<_>>();

        let tags = tags
            .map(|tags| {
                tags.into_iter()
                    .map(|x| x.as_string().unwrap())
                    .collect::<Vec<_>>()
            })
            .unwrap_or(vec![]);

        let nearest = self.victor.find_nearest_neighbor(embedding, tags).await;

        if let Some(nearest) = nearest {
            wasm_bindgen::JsValue::from_str(&nearest.content)
        } else {
            wasm_bindgen::JsValue::NULL
        }
    }

    pub async fn clear(&mut self) {
        utils::set_panic_hook();

        let result = self.victor.clear_db().await; // ignore the error if there is one
        if !result.is_ok() {
            console_warn!("Failed to clear victor data: {:?}", result);
        }
    }
}