perspective 2.0.0

A data visualization and analytics component, especially well-suited for large and/or streaming datasets.
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////////////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2018, the Perspective Authors.
//
// This file is part of the Perspective library, distributed under the terms
// of the Apache License 2.0.  The full license can be found in the LICENSE
// file.

use std::collections::HashMap;

use super::registry::*;
use crate::js::plugin::*;

#[derive(Default)]
pub struct PluginStore {
    plugins: Option<Vec<JsPerspectiveViewerPlugin>>,
    plugin_records: Option<HashMap<String, Vec<String>>>,
}

impl PluginStore {
    fn init_lazy(&mut self) {
        self.plugins = Some(PLUGIN_REGISTRY.create_plugins());
        self.plugin_records = Some(PLUGIN_REGISTRY.available_plugin_names_by_category());
    }

    pub fn plugins(&mut self) -> &Vec<JsPerspectiveViewerPlugin> {
        if self.plugins.is_none() {
            self.init_lazy();
        }

        self.plugins.as_ref().unwrap()
    }

    pub fn plugin_records(&mut self) -> &HashMap<String, Vec<String>> {
        if self.plugins.is_none() {
            self.init_lazy();
        }

        self.plugin_records.as_ref().unwrap()
    }
}