async-graphql 1.3.2

The GraphQL server library implemented by rust
Documentation 
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mod model;

use model::Episode;
pub use model::QueryRoot;
use slab::Slab;
use std::collections::HashMap;

pub struct StarWarsChar {
    id: &'static str,
    name: &'static str,
    friends: Vec<usize>,
    appears_in: Vec<Episode>,
    home_planet: Option<&'static str>,
    primary_function: Option<&'static str>,
}

pub struct StarWars {
    luke: usize,
    artoo: usize,
    chars: Slab<StarWarsChar>,
    human_data: HashMap<&'static str, usize>,
    droid_data: HashMap<&'static str, usize>,
}

impl StarWars {
    pub fn new() -> Self {
        let mut chars = Slab::new();

        let luke = chars.insert(StarWarsChar {
            id: "1000",
            name: "Luke Skywalker",
            friends: vec![],
            appears_in: vec![],
            home_planet: Some("Tatooine"),
            primary_function: None,
        });

        let vader = chars.insert(StarWarsChar {
            id: "1001",
            name: "Luke Skywalker",
            friends: vec![],
            appears_in: vec![],
            home_planet: Some("Tatooine"),
            primary_function: None,
        });

        let han = chars.insert(StarWarsChar {
            id: "1002",
            name: "Han Solo",
            friends: vec![],
            appears_in: vec![Episode::Empire, Episode::NewHope, Episode::Jedi],
            home_planet: None,
            primary_function: None,
        });

        let leia = chars.insert(StarWarsChar {
            id: "1003",
            name: "Leia Organa",
            friends: vec![],
            appears_in: vec![Episode::Empire, Episode::NewHope, Episode::Jedi],
            home_planet: Some("Alderaa"),
            primary_function: None,
        });

        let tarkin = chars.insert(StarWarsChar {
            id: "1004",
            name: "Wilhuff Tarkin",
            friends: vec![],
            appears_in: vec![Episode::Empire, Episode::NewHope, Episode::Jedi],
            home_planet: None,
            primary_function: None,
        });

        let threepio = chars.insert(StarWarsChar {
            id: "2000",
            name: "C-3PO",
            friends: vec![],
            appears_in: vec![Episode::Empire, Episode::NewHope, Episode::Jedi],
            home_planet: None,
            primary_function: Some("Protocol"),
        });

        let artoo = chars.insert(StarWarsChar {
            id: "2001",
            name: "R2-D2",
            friends: vec![],
            appears_in: vec![Episode::Empire, Episode::NewHope, Episode::Jedi],
            home_planet: None,
            primary_function: Some("Astromech"),
        });

        chars[luke].friends = vec![han, leia, threepio, artoo];
        chars[vader].friends = vec![tarkin];
        chars[han].friends = vec![luke, leia, artoo];
        chars[leia].friends = vec![luke, han, threepio, artoo];
        chars[tarkin].friends = vec![vader];
        chars[threepio].friends = vec![luke, han, leia, artoo];
        chars[artoo].friends = vec![luke, han, leia];

        let mut human_data = HashMap::new();
        human_data.insert("1000", luke);
        human_data.insert("1001", vader);
        human_data.insert("1002", han);
        human_data.insert("1003", leia);
        human_data.insert("1004", tarkin);

        let mut droid_data = HashMap::new();
        droid_data.insert("2000", threepio);
        droid_data.insert("2001", artoo);

        Self {
            luke,
            artoo,
            chars,
            human_data,
            droid_data,
        }
    }

    pub fn human(&self, id: &str) -> Option<usize> {
        self.human_data.get(id).cloned()
    }

    pub fn droid(&self, id: &str) -> Option<usize> {
        self.droid_data.get(id).cloned()
    }

    pub fn humans(&self) -> Vec<usize> {
        self.human_data.values().cloned().collect()
    }

    pub fn droids(&self) -> Vec<usize> {
        self.droid_data.values().cloned().collect()
    }
}