mcfly 0.5.3

McFly replaces your default ctrl-r shell history search with an intelligent search engine that takes into account your working directory and the context of recently executed commands. McFly's suggestions are prioritized in real time with a small neural network.
Documentation 
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use crate::history::history::Features;
use crate::network::Network;
use rusqlite::Connection;

pub fn add_db_functions(db: &Connection) {
    let network = Network::default();
    db.create_scalar_function("nn_rank", 10, true, move |ctx| {
        let age_factor = ctx.get::<f64>(0)?;
        let length_factor = ctx.get::<f64>(1)?;
        let exit_factor = ctx.get::<f64>(2)?;
        let recent_failure_factor = ctx.get::<f64>(3)?;
        let selected_dir_factor = ctx.get::<f64>(4)?;
        let dir_factor = ctx.get::<f64>(5)?;
        let overlap_factor = ctx.get::<f64>(6)?;
        let immediate_overlap_factor = ctx.get::<f64>(7)?;
        let selected_occurrences_factor = ctx.get::<f64>(8)?;
        let occurrences_factor = ctx.get::<f64>(9)?;

        let features = Features {
            age_factor,
            length_factor,
            exit_factor,
            recent_failure_factor,
            selected_dir_factor,
            dir_factor,
            overlap_factor,
            immediate_overlap_factor,
            selected_occurrences_factor,
            occurrences_factor,
        };

        Ok(network.output(&features))
    })
    .unwrap_or_else(|err| {
        panic!(format!(
            "McFly error: Successful create_scalar_function ({})",
            err
        ))
    });
}