jelq

public

an http based roguelike rpg about jelqing

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//! Plumbing shared by every resource under `/runs/{id}`.

use axum::{
    http::{HeaderName, HeaderValue, StatusCode, header},
    response::{IntoResponse, Response},
};
use hyper_util::rt::TokioIo;
use tokio::io::AsyncWriteExt;

use super::{
    AppState, ctx::Ctx, links, middleware::Compress, registry::Lock, resource::Resource, shame,
};
use crate::{
    game::{
        Cause, Gauges, Run, Shown,
        balance::{FRICTION_MAX, SUSPICION_LIMIT},
    },
    headers::{
        X_CASH, X_DANGER, X_EQ, X_FLOOR, X_FLOOR_TURN, X_FORESKIN, X_FRICTION, X_GAINS_ARRIVED,
        X_GIRTH, X_LENGTH, X_OBSERVED_BY, X_RUN_OVER, X_SELF_REPORTED_LENGTH, X_SHAME, X_STAMINA,
        X_SUSPICION, X_TURN,
    },
    locale::Locale,
    problem::{PROBLEM_BASE, Problem},
    records::Record,
    secret::Secret,
};

/// Which household hazards stand between a request and the run.
#[derive(Clone, Copy, PartialEq, Eq)]
pub enum Scope {
    Home,
    Pockets,
}

pub struct RunResource {
    pub scope: Scope,
    pub resource: Resource<Run>,
}

/// What the server writes over the connection after a `101`.
#[derive(Clone)]
pub struct Greeting(pub String);

pub fn records_unavailable(error: &rusqlite::Error) -> Response {
    Problem::new(
        StatusCode::SERVICE_UNAVAILABLE,
        "records-unavailable",
        "The records are unavailable. Nothing has been forgotten, it is only out of reach.",
    )
    .with("error", error.to_string())
    .into_response()
}

pub fn serve(state: &AppState, mut ctx: Ctx, target: &RunResource) -> Response {
    let id = ctx.param("id").to_owned();
    let Some(slot) = state.runs.get(&id) else {
        return match state.records.find(&id) {
            Ok(Some(Record {
                cause: Some(cause),
                turn,
                ..
            })) => gone(cause.slug(), turn),
            Ok(_) => Problem::new(
                StatusCode::NOT_FOUND,
                "no-such-run",
                "There is no such run. There may never have been.",
            )
            .into_response(),
            Err(error) => records_unavailable(&error),
        };
    };
    let (response, record) = match Lock::take(&slot) {
        Lock::Poisoned(mut run) => {
            run.lose();
            let response = gone(Cause::Lost.slug(), run.turn);
            (response, Some(Record::of(&run)))
        }
        Lock::Held(mut run) => {
            if let Some(ending) = &run.ended {
                return gone(ending.cause.slug(), ending.turn);
            }
            run.seen(ctx.now());
            let mut response = gate(&mut run, &ctx, target.scope)
                .unwrap_or_else(|| target.resource.dispatch(&mut run, &ctx));
            if let Some(ending) = &run.ended {
                response
                    .headers_mut()
                    .insert(X_RUN_OVER, HeaderValue::from_static(ending.cause.slug()));
            }
            let response = finish(&mut run, &ctx, &state.config.secret, response);
            let record = run.status().finished().then(|| Record::of(&run));
            (response, record)
        }
    };
    if let Some(record) = record {
        if let Err(error) = state.records.save(&record) {
            return records_unavailable(&error);
        }
        if record.cause.is_some() {
            state.runs.remove(&id);
        }
    }
    greet(response, &mut ctx)
}

fn gone(cause: &str, turn: u32) -> Response {
    Problem::new(StatusCode::GONE, "run-ended", "This run has ended.")
        .with("cause", format!("{PROBLEM_BASE}{cause}"))
        .with("turn", turn)
        .with("graveyard", "/graveyard")
        .header(X_RUN_OVER, cause)
        .into_response()
}

fn gate(run: &mut Run, ctx: &Ctx, scope: Scope) -> Option<Response> {
    if scope == Scope::Pockets {
        return None;
    }
    if run.needs_portal() {
        let portal = run.path("/portal");
        return Some(
            Problem::new(
                StatusCode::NETWORK_AUTHENTICATION_REQUIRED,
                "captive-portal",
                "The network requires authentication. The hotel would like you to agree to some terms.",
            )
            .with("portal", portal.as_str())
            .header(
                header::LINK,
                format!("<{portal}>; rel=\"{}portal\"", links::REL_BASE),
            )
            .into_response(),
        );
    }
    let authorization = ctx
        .header(header::AUTHORIZATION)
        .map(|text| Locale::negotiate(ctx.header(header::ACCEPT_LANGUAGE)).canonicalise(text));
    run.answer_door(authorization.as_deref())
        .err()
        .map(IntoResponse::into_response)
}

fn stats(gauges: &Gauges, shame: u32) -> Vec<(HeaderName, String)> {
    let mut stats = vec![
        match gauges.length {
            Shown::Measured(length) => (X_LENGTH, format!("{length:.2}")),
            Shown::SelfReported(length) => (X_SELF_REPORTED_LENGTH, format!("{length:.2}")),
        },
        (X_GIRTH, format!("{:.2}", gauges.girth)),
        (
            X_FORESKIN,
            gauges.foreskin.map_or("gone".into(), |f| format!("{f:.2}")),
        ),
        (X_FRICTION, format!("{}/{FRICTION_MAX}", gauges.friction)),
        (X_EQ, gauges.arousal.name().into()),
        (
            X_STAMINA,
            format!("{}/{}", gauges.stamina, gauges.max_stamina),
        ),
        (
            X_SUSPICION,
            format!("{}/{SUSPICION_LIMIT}", gauges.suspicion),
        ),
        (X_SHAME, shame.to_string()),
        (X_CASH, gauges.cash.to_string()),
        (X_FLOOR, gauges.floor.to_string()),
        (X_TURN, gauges.turn.to_string()),
        (
            X_FLOOR_TURN,
            gauges
                .floor_limit
                .map_or(gauges.floor_turns.to_string(), |limit| {
                    format!("{}/{limit}", gauges.floor_turns)
                }),
        ),
    ];
    if !gauges.dangers.is_empty() {
        let dangers: Vec<String> = gauges
            .dangers
            .iter()
            .map(|(gauge, danger)| format!("{gauge}={}", danger.name()))
            .collect();
        stats.push((X_DANGER, dangers.join(", ")));
    }
    if let Some(observer) = gauges.observed {
        stats.push((X_OBSERVED_BY, observer.name().into()));
    }
    if let Some(challenge) = &gauges.mum_challenge {
        stats.push((header::VIA, "1.1 mum".into()));
        stats.push((header::VARY, "Mum".into()));
        stats.push((header::WWW_AUTHENTICATE, challenge.clone()));
    }
    if let Some(arrived) = &gauges.arrived {
        let mut gains = format!("length={:.3}, girth={:.3}", arrived.length, arrived.girth);
        if let Some(foreskin) = arrived.foreskin {
            gains.push_str(&format!(", foreskin={foreskin:.3}"));
        }
        stats.push((X_GAINS_ARRIVED, gains));
    }
    // RFC 9111 obsoleted Warning, which is why nobody heeds it.
    for warning in &gauges.warnings {
        stats.push((header::WARNING, format!("199 - \"{warning}\"")));
    }
    stats
}

pub fn finish(run: &mut Run, ctx: &Ctx, secret: &Secret, mut response: Response) -> Response {
    let status = response.status();
    if status == StatusCode::NOT_MODIFIED {
        return response;
    }
    let (shame, shame_cookie) = shame::settle(run, ctx, secret);
    let gauges = run.gauges();
    let link = links::header(run);
    let headers = response.headers_mut();
    for (name, value) in stats(&gauges, shame) {
        if let Ok(value) = HeaderValue::from_str(&value) {
            headers.append(name, value);
        }
    }
    if let Ok(link) = HeaderValue::from_str(&link) {
        headers.append(header::LINK, link);
    }
    headers.append(header::SET_COOKIE, shame_cookie);
    if gauges.ruler {
        headers.append(header::SET_COOKIE, shame::ruler_cookie(secret));
    }
    let bodiless = status.is_informational() || status == StatusCode::NO_CONTENT;
    if gauges.ring && !bodiless {
        response.extensions_mut().insert(Compress);
    }
    response
}

fn greet(response: Response, ctx: &mut Ctx) -> Response {
    if response.status() != StatusCode::SWITCHING_PROTOCOLS {
        return response;
    }
    let (Some(Greeting(text)), Some(upgrade)) = (
        response.extensions().get::<Greeting>().cloned(),
        ctx.take_upgrade(),
    ) else {
        return response;
    };
    tokio::spawn(async move {
        if let Ok(upgraded) = upgrade.await {
            let mut io = TokioIo::new(upgraded);
            let _ = io.write_all(text.as_bytes()).await;
            let _ = io.shutdown().await;
        }
    });
    response
}

1	//! Plumbing shared by every resource under `/runs/{id}`.
2
3	use axum::{
4	http::{HeaderName, HeaderValue, StatusCode, header},
5	response::{IntoResponse, Response},
6	};
7	use hyper_util::rt::TokioIo;
8	use tokio::io::AsyncWriteExt;
9
10	use super::{
11	AppState, ctx::Ctx, links, middleware::Compress, registry::Lock, resource::Resource, shame,
12	};
13	use crate::{
14	game::{
15	Cause, Gauges, Run, Shown,
16	balance::{FRICTION_MAX, SUSPICION_LIMIT},
17	},
18	headers::{
19	X_CASH, X_DANGER, X_EQ, X_FLOOR, X_FLOOR_TURN, X_FORESKIN, X_FRICTION, X_GAINS_ARRIVED,
20	X_GIRTH, X_LENGTH, X_OBSERVED_BY, X_RUN_OVER, X_SELF_REPORTED_LENGTH, X_SHAME, X_STAMINA,
21	X_SUSPICION, X_TURN,
22	},
23	locale::Locale,
24	problem::{PROBLEM_BASE, Problem},
25	records::Record,
26	secret::Secret,
27	};
28
29	/// Which household hazards stand between a request and the run.
30	#[derive(Clone, Copy, PartialEq, Eq)]
31	pub enum Scope {
32	Home,
33	Pockets,
34	}
35
36	pub struct RunResource {
37	pub scope: Scope,
38	pub resource: Resource<Run>,
39	}
40
41	/// What the server writes over the connection after a `101`.
42	#[derive(Clone)]
43	pub struct Greeting(pub String);
44
45	pub fn records_unavailable(error: &rusqlite::Error) -> Response {
46	Problem::new(
47	StatusCode::SERVICE_UNAVAILABLE,
48	"records-unavailable",
49	"The records are unavailable. Nothing has been forgotten, it is only out of reach.",
50	)
51	.with("error", error.to_string())
52	.into_response()
53	}
54
55	pub fn serve(state: &AppState, mut ctx: Ctx, target: &RunResource) -> Response {
56	let id = ctx.param("id").to_owned();
57	let Some(slot) = state.runs.get(&id) else {
58	return match state.records.find(&id) {
59	Ok(Some(Record {
60	cause: Some(cause),
61	turn,
62	..
63	})) => gone(cause.slug(), turn),
64	Ok(_) => Problem::new(
65	StatusCode::NOT_FOUND,
66	"no-such-run",
67	"There is no such run. There may never have been.",
68	)
69	.into_response(),
70	Err(error) => records_unavailable(&error),
71	};
72	};
73	let (response, record) = match Lock::take(&slot) {
74	Lock::Poisoned(mut run) => {
75	run.lose();
76	let response = gone(Cause::Lost.slug(), run.turn);
77	(response, Some(Record::of(&run)))
78	}
79	Lock::Held(mut run) => {
80	if let Some(ending) = &run.ended {
81	return gone(ending.cause.slug(), ending.turn);
82	}
83	run.seen(ctx.now());
84	let mut response = gate(&mut run, &ctx, target.scope)
85	.unwrap_or_else(\|\| target.resource.dispatch(&mut run, &ctx));
86	if let Some(ending) = &run.ended {
87	response
88	.headers_mut()
89	.insert(X_RUN_OVER, HeaderValue::from_static(ending.cause.slug()));
90	}
91	let response = finish(&mut run, &ctx, &state.config.secret, response);
92	let record = run.status().finished().then(\|\| Record::of(&run));
93	(response, record)
94	}
95	};
96	if let Some(record) = record {
97	if let Err(error) = state.records.save(&record) {
98	return records_unavailable(&error);
99	}
100	if record.cause.is_some() {
101	state.runs.remove(&id);
102	}
103	}
104	greet(response, &mut ctx)
105	}
106
107	fn gone(cause: &str, turn: u32) -> Response {
108	Problem::new(StatusCode::GONE, "run-ended", "This run has ended.")
109	.with("cause", format!("{PROBLEM_BASE}{cause}"))
110	.with("turn", turn)
111	.with("graveyard", "/graveyard")
112	.header(X_RUN_OVER, cause)
113	.into_response()
114	}
115
116	fn gate(run: &mut Run, ctx: &Ctx, scope: Scope) -> Option<Response> {
117	if scope == Scope::Pockets {
118	return None;
119	}
120	if run.needs_portal() {
121	let portal = run.path("/portal");
122	return Some(
123	Problem::new(
124	StatusCode::NETWORK_AUTHENTICATION_REQUIRED,
125	"captive-portal",
126	"The network requires authentication. The hotel would like you to agree to some terms.",
127	)
128	.with("portal", portal.as_str())
129	.header(
130	header::LINK,
131	format!("<{portal}>; rel=\"{}portal\"", links::REL_BASE),
132	)
133	.into_response(),
134	);
135	}
136	let authorization = ctx
137	.header(header::AUTHORIZATION)
138	.map(\|text\| Locale::negotiate(ctx.header(header::ACCEPT_LANGUAGE)).canonicalise(text));
139	run.answer_door(authorization.as_deref())
140	.err()
141	.map(IntoResponse::into_response)
142	}
143
144	fn stats(gauges: &Gauges, shame: u32) -> Vec<(HeaderName, String)> {
145	let mut stats = vec![
146	match gauges.length {
147	Shown::Measured(length) => (X_LENGTH, format!("{length:.2}")),
148	Shown::SelfReported(length) => (X_SELF_REPORTED_LENGTH, format!("{length:.2}")),
149	},
150	(X_GIRTH, format!("{:.2}", gauges.girth)),
151	(
152	X_FORESKIN,
153	gauges.foreskin.map_or("gone".into(), \|f\| format!("{f:.2}")),
154	),
155	(X_FRICTION, format!("{}/{FRICTION_MAX}", gauges.friction)),
156	(X_EQ, gauges.arousal.name().into()),
157	(
158	X_STAMINA,
159	format!("{}/{}", gauges.stamina, gauges.max_stamina),
160	),
161	(
162	X_SUSPICION,
163	format!("{}/{SUSPICION_LIMIT}", gauges.suspicion),
164	),
165	(X_SHAME, shame.to_string()),
166	(X_CASH, gauges.cash.to_string()),
167	(X_FLOOR, gauges.floor.to_string()),
168	(X_TURN, gauges.turn.to_string()),
169	(
170	X_FLOOR_TURN,
171	gauges
172	.floor_limit
173	.map_or(gauges.floor_turns.to_string(), \|limit\| {
174	format!("{}/{limit}", gauges.floor_turns)
175	}),
176	),
177	];
178	if !gauges.dangers.is_empty() {
179	let dangers: Vec<String> = gauges
180	.dangers
181	.iter()
182	.map(\|(gauge, danger)\| format!("{gauge}={}", danger.name()))
183	.collect();
184	stats.push((X_DANGER, dangers.join(", ")));
185	}
186	if let Some(observer) = gauges.observed {
187	stats.push((X_OBSERVED_BY, observer.name().into()));
188	}
189	if let Some(challenge) = &gauges.mum_challenge {
190	stats.push((header::VIA, "1.1 mum".into()));
191	stats.push((header::VARY, "Mum".into()));
192	stats.push((header::WWW_AUTHENTICATE, challenge.clone()));
193	}
194	if let Some(arrived) = &gauges.arrived {
195	let mut gains = format!("length={:.3}, girth={:.3}", arrived.length, arrived.girth);
196	if let Some(foreskin) = arrived.foreskin {
197	gains.push_str(&format!(", foreskin={foreskin:.3}"));
198	}
199	stats.push((X_GAINS_ARRIVED, gains));
200	}
201	// RFC 9111 obsoleted Warning, which is why nobody heeds it.
202	for warning in &gauges.warnings {
203	stats.push((header::WARNING, format!("199 - \"{warning}\"")));
204	}
205	stats
206	}
207
208	pub fn finish(run: &mut Run, ctx: &Ctx, secret: &Secret, mut response: Response) -> Response {
209	let status = response.status();
210	if status == StatusCode::NOT_MODIFIED {
211	return response;
212	}
213	let (shame, shame_cookie) = shame::settle(run, ctx, secret);
214	let gauges = run.gauges();
215	let link = links::header(run);
216	let headers = response.headers_mut();
217	for (name, value) in stats(&gauges, shame) {
218	if let Ok(value) = HeaderValue::from_str(&value) {
219	headers.append(name, value);
220	}
221	}
222	if let Ok(link) = HeaderValue::from_str(&link) {
223	headers.append(header::LINK, link);
224	}
225	headers.append(header::SET_COOKIE, shame_cookie);
226	if gauges.ruler {
227	headers.append(header::SET_COOKIE, shame::ruler_cookie(secret));
228	}
229	let bodiless = status.is_informational() \|\| status == StatusCode::NO_CONTENT;
230	if gauges.ring && !bodiless {
231	response.extensions_mut().insert(Compress);
232	}
233	response
234	}
235
236	fn greet(response: Response, ctx: &mut Ctx) -> Response {
237	if response.status() != StatusCode::SWITCHING_PROTOCOLS {
238	return response;
239	}
240	let (Some(Greeting(text)), Some(upgrade)) = (
241	response.extensions().get::<Greeting>().cloned(),
242	ctx.take_upgrade(),
243	) else {
244	return response;
245	};
246	tokio::spawn(async move {
247	if let Ok(upgraded) = upgrade.await {
248	let mut io = TokioIo::new(upgraded);
249	let _ = io.write_all(text.as_bytes()).await;
250	let _ = io.shutdown().await;
251	}
252	});
253	response
254	}