jelq

public

an http based roguelike rpg about jelqing

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//! The public listings, paged fifty at a time with RFC 8288 `next` and `prev` links.

use axum::{
    Json,
    http::{StatusCode, header},
    response::{IntoResponse, Response},
};
use serde_json::{Value, json};

use super::{
    Shared,
    ctx::Ctx,
    meta::{GRAVEYARD_PATH, LEADERBOARD_PATH},
    run::records_unavailable,
};
use crate::{
    game::{balance::MM_PER_INCH, volume},
    link::Link,
    problem::{PROBLEM_BASE, Problem},
    records::{Ranking, Record},
};

const PAGE: usize = 50;

fn page(ctx: &Ctx) -> Result<usize, Problem> {
    match ctx.query("page").map(str::parse::<usize>) {
        None => Ok(1),
        Some(Ok(page)) if page >= 1 => Ok(page),
        Some(_) => Err(Problem::new(
            StatusCode::BAD_REQUEST,
            "bad-page",
            "Pages are counted from 1.",
        )),
    }
}

/// `query` is everything but the page, already encoded, so the links keep the caller's sort.
fn paged(body: Value, path: &str, query: &str, page: usize, full: bool) -> Response {
    let link = |page: usize, rel: &str| {
        let separator = if query.is_empty() { "" } else { "&" };
        Link::registered(&format!("{path}?{query}{separator}page={page}"), rel).to_string()
    };
    let mut links = Vec::new();
    if page > 1 {
        links.push(link(page - 1, "prev"));
    }
    if full {
        links.push(link(page + 1, "next"));
    }
    let mut response = Json(body).into_response();
    if links.is_empty() {
        return response;
    }
    if let Ok(value) = links.join(", ").parse() {
        response.headers_mut().insert(header::LINK, value);
    }
    response
}

pub fn graveyard(state: &mut Shared, ctx: &Ctx) -> Response {
    let page = match page(ctx) {
        Ok(page) => page,
        Err(problem) => return problem.into_response(),
    };
    let dead = match state.records.dead((page - 1) * PAGE, PAGE) {
        Ok(dead) => dead,
        Err(error) => return records_unavailable(&error),
    };
    let full = dead.len() == PAGE;
    let runs: Vec<Value> = dead
        .into_iter()
        .filter_map(|record| {
            let cause = record.cause?;
            Some(json!({
                "public_id": record.public_id,
                "cause": format!("{PROBLEM_BASE}{}", cause.slug()),
                "detail": cause.detail(),
                "turn": record.turn,
            }))
        })
        .collect();
    paged(json!({ "runs": runs }), GRAVEYARD_PATH, "", page, full)
}

fn ranking(state: &Shared, ctx: &Ctx) -> Result<Ranking, Problem> {
    match ctx.query("sort") {
        None | Some("self-reported-length") => Ok(Ranking::SelfReported),
        Some("volume") => Ok(Ranking::Volume),
        Some("content-length") => match ctx.cookie("ruler") {
            Some(ruler) if state.config.secret.verify("ruler", ruler) == Some("1") => {
                Ok(Ranking::ContentLength)
            }
            Some(_) => Err(Problem::new(
                StatusCode::BAD_REQUEST,
                "exaggeration",
                "The server has measured. Lying is not a technique.",
            )
            .with("cookie", "ruler")),
            None => Err(Problem::new(
                StatusCode::FORBIDDEN,
                "ruler-required",
                "Sorting by the truth requires a Ruler.",
            )),
        },
        Some(_) => Err(Problem::new(
            StatusCode::BAD_REQUEST,
            "unknown-sort",
            "The leaderboard sorts by self-reported-length, volume or content-length.",
        )),
    }
}

fn score(ranking: Ranking, record: &Record) -> f64 {
    match ranking {
        Ranking::SelfReported => record.self_reported,
        Ranking::ContentLength => record.length,
        Ranking::Volume => volume(record.self_reported, record.girth),
    }
}

fn entry(ranking: Ranking, record: &Record) -> Value {
    let mut entry = json!({
        "public_id": record.public_id,
        "status": record.status.name(),
        "floor": record.floor,
        "self_reported_length": (record.self_reported * 100.0).round() / 100.0,
        "ranked": !record.seeded,
        "viral": record.viral,
    });
    match ranking {
        Ranking::Volume => {
            entry["volume"] = json!((score(ranking, record) * 100.0).round() / 100.0);
        }
        Ranking::ContentLength => {
            entry["content_length"] = json!((record.length * MM_PER_INCH).round());
        }
        Ranking::SelfReported => {}
    }
    entry
}

/// Live runs are ranked alongside the recorded ones, and a live run outranks its own stale record.
pub fn leaderboard(state: &mut Shared, ctx: &Ctx) -> Response {
    let (ranking, page) = match ranking(state, ctx).and_then(|r| Ok((r, page(ctx)?))) {
        Ok(parsed) => parsed,
        Err(problem) => return problem.into_response(),
    };
    let seeded = ctx.query("seeded") == Some("include");
    let mut entries: Vec<Record> = state
        .runs
        .each(Record::of)
        .into_iter()
        .filter(|record| seeded || !record.seeded)
        .collect();
    let wanted = page * PAGE;
    match state
        .records
        .top(ranking, seeded, 0, wanted + entries.len())
    {
        Ok(recorded) => entries.extend(
            recorded
                .into_iter()
                .filter(|record| !state.runs.contains(&record.id)),
        ),
        Err(error) => return records_unavailable(&error),
    }
    entries.sort_by(|a, b| score(ranking, b).total_cmp(&score(ranking, a)));
    let full = entries.len() > wanted;
    let listed: Vec<Value> = entries
        .iter()
        .skip(wanted - PAGE)
        .take(PAGE)
        .map(|record| entry(ranking, record))
        .collect();
    let mut query = Vec::new();
    if let Some(sort) = ctx.query("sort") {
        query.push(format!("sort={sort}"));
    }
    if seeded {
        query.push("seeded=include".to_owned());
    }
    paged(
        json!({ "entries": listed }),
        LEADERBOARD_PATH,
        &query.join("&"),
        page,
        full,
    )
}

1	//! The public listings, paged fifty at a time with RFC 8288 `next` and `prev` links.
2
3	use axum::{
4	Json,
5	http::{StatusCode, header},
6	response::{IntoResponse, Response},
7	};
8	use serde_json::{Value, json};
9
10	use super::{
11	Shared,
12	ctx::Ctx,
13	meta::{GRAVEYARD_PATH, LEADERBOARD_PATH},
14	run::records_unavailable,
15	};
16	use crate::{
17	game::{balance::MM_PER_INCH, volume},
18	link::Link,
19	problem::{PROBLEM_BASE, Problem},
20	records::{Ranking, Record},
21	};
22
23	const PAGE: usize = 50;
24
25	fn page(ctx: &Ctx) -> Result<usize, Problem> {
26	match ctx.query("page").map(str::parse::<usize>) {
27	None => Ok(1),
28	Some(Ok(page)) if page >= 1 => Ok(page),
29	Some(_) => Err(Problem::new(
30	StatusCode::BAD_REQUEST,
31	"bad-page",
32	"Pages are counted from 1.",
33	)),
34	}
35	}
36
37	/// `query` is everything but the page, already encoded, so the links keep the caller's sort.
38	fn paged(body: Value, path: &str, query: &str, page: usize, full: bool) -> Response {
39	let link = \|page: usize, rel: &str\| {
40	let separator = if query.is_empty() { "" } else { "&" };
41	Link::registered(&format!("{path}?{query}{separator}page={page}"), rel).to_string()
42	};
43	let mut links = Vec::new();
44	if page > 1 {
45	links.push(link(page - 1, "prev"));
46	}
47	if full {
48	links.push(link(page + 1, "next"));
49	}
50	let mut response = Json(body).into_response();
51	if links.is_empty() {
52	return response;
53	}
54	if let Ok(value) = links.join(", ").parse() {
55	response.headers_mut().insert(header::LINK, value);
56	}
57	response
58	}
59
60	pub fn graveyard(state: &mut Shared, ctx: &Ctx) -> Response {
61	let page = match page(ctx) {
62	Ok(page) => page,
63	Err(problem) => return problem.into_response(),
64	};
65	let dead = match state.records.dead((page - 1) * PAGE, PAGE) {
66	Ok(dead) => dead,
67	Err(error) => return records_unavailable(&error),
68	};
69	let full = dead.len() == PAGE;
70	let runs: Vec<Value> = dead
71	.into_iter()
72	.filter_map(\|record\| {
73	let cause = record.cause?;
74	Some(json!({
75	"public_id": record.public_id,
76	"cause": format!("{PROBLEM_BASE}{}", cause.slug()),
77	"detail": cause.detail(),
78	"turn": record.turn,
79	}))
80	})
81	.collect();
82	paged(json!({ "runs": runs }), GRAVEYARD_PATH, "", page, full)
83	}
84
85	fn ranking(state: &Shared, ctx: &Ctx) -> Result<Ranking, Problem> {
86	match ctx.query("sort") {
87	None \| Some("self-reported-length") => Ok(Ranking::SelfReported),
88	Some("volume") => Ok(Ranking::Volume),
89	Some("content-length") => match ctx.cookie("ruler") {
90	Some(ruler) if state.config.secret.verify("ruler", ruler) == Some("1") => {
91	Ok(Ranking::ContentLength)
92	}
93	Some(_) => Err(Problem::new(
94	StatusCode::BAD_REQUEST,
95	"exaggeration",
96	"The server has measured. Lying is not a technique.",
97	)
98	.with("cookie", "ruler")),
99	None => Err(Problem::new(
100	StatusCode::FORBIDDEN,
101	"ruler-required",
102	"Sorting by the truth requires a Ruler.",
103	)),
104	},
105	Some(_) => Err(Problem::new(
106	StatusCode::BAD_REQUEST,
107	"unknown-sort",
108	"The leaderboard sorts by self-reported-length, volume or content-length.",
109	)),
110	}
111	}
112
113	fn score(ranking: Ranking, record: &Record) -> f64 {
114	match ranking {
115	Ranking::SelfReported => record.self_reported,
116	Ranking::ContentLength => record.length,
117	Ranking::Volume => volume(record.self_reported, record.girth),
118	}
119	}
120
121	fn entry(ranking: Ranking, record: &Record) -> Value {
122	let mut entry = json!({
123	"public_id": record.public_id,
124	"status": record.status.name(),
125	"floor": record.floor,
126	"self_reported_length": (record.self_reported * 100.0).round() / 100.0,
127	"ranked": !record.seeded,
128	"viral": record.viral,
129	});
130	match ranking {
131	Ranking::Volume => {
132	entry["volume"] = json!((score(ranking, record) * 100.0).round() / 100.0);
133	}
134	Ranking::ContentLength => {
135	entry["content_length"] = json!((record.length * MM_PER_INCH).round());
136	}
137	Ranking::SelfReported => {}
138	}
139	entry
140	}
141
142	/// Live runs are ranked alongside the recorded ones, and a live run outranks its own stale record.
143	pub fn leaderboard(state: &mut Shared, ctx: &Ctx) -> Response {
144	let (ranking, page) = match ranking(state, ctx).and_then(\|r\| Ok((r, page(ctx)?))) {
145	Ok(parsed) => parsed,
146	Err(problem) => return problem.into_response(),
147	};
148	let seeded = ctx.query("seeded") == Some("include");
149	let mut entries: Vec<Record> = state
150	.runs
151	.each(Record::of)
152	.into_iter()
153	.filter(\|record\| seeded \|\| !record.seeded)
154	.collect();
155	let wanted = page * PAGE;
156	match state
157	.records
158	.top(ranking, seeded, 0, wanted + entries.len())
159	{
160	Ok(recorded) => entries.extend(
161	recorded
162	.into_iter()
163	.filter(\|record\| !state.runs.contains(&record.id)),
164	),
165	Err(error) => return records_unavailable(&error),
166	}
167	entries.sort_by(\|a, b\| score(ranking, b).total_cmp(&score(ranking, a)));
168	let full = entries.len() > wanted;
169	let listed: Vec<Value> = entries
170	.iter()
171	.skip(wanted - PAGE)
172	.take(PAGE)
173	.map(\|record\| entry(ranking, record))
174	.collect();
175	let mut query = Vec::new();
176	if let Some(sort) = ctx.query("sort") {
177	query.push(format!("sort={sort}"));
178	}
179	if seeded {
180	query.push("seeded=include".to_owned());
181	}
182	paged(
183	json!({ "entries": listed }),
184	LEADERBOARD_PATH,
185	&query.join("&"),
186	page,
187	full,
188	)
189	}