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use axum::extract::Form;
use axum::http::StatusCode;
use axum::response::{Html, IntoResponse};
use axum::Extension;
use info_utils::prelude::*;
use crate::CreateForm;
use crate::ServerState;
use crate::UrlRow;
#[derive(Debug, Clone, sqlx::FromRow, PartialEq, Eq)]
struct NextId {
id: String,
index: Option<i64>,
exists: bool,
}
#[derive(Debug, Clone, sqlx::FromRow, PartialEq, Eq)]
struct NextIndex {
new_index: Option<i64>,
}
pub async fn create_link(
Extension(state): Extension<ServerState>,
Form(form): Form<CreateForm>,
) -> impl IntoResponse {
log!("Request to create '{}' -> {}", form.id, form.url.as_str());
let try_id = generate_id(form.clone(), state.clone()).await;
if let Ok(id) = try_id {
if id.exists {
log!("Serving cached id {} -> {}", id.id, form.url.as_str());
return Html(format!(
r#"<pre>http{}://{}/{} -> <a href="{}"">{}</a></pre>"#,
if state.uses_https { "s" } else { "" },
state.host,
id.id,
form.url.as_str(),
form.url.as_str(),
))
.into_response();
}
let res;
if let Some(index) = id.index {
res = sqlx::query(
"
INSERT INTO chela.urls (index,id,url,custom_id)
VALUES ($1,$2,$3,false)
",
)
.bind(index)
.bind(id.id.clone())
.bind(form.url.as_str())
.execute(&state.db_pool)
.await;
} else {
res = sqlx::query(
"
INSERT INTO chela.urls (id,url,custom_id)
VALUES ($1,$2,true)
",
)
.bind(id.id.clone())
.bind(form.url.as_str())
.execute(&state.db_pool)
.await;
}
match res {
Ok(_) => {
log!("Created new id {} -> {}", id.id, form.url.as_str());
return (
StatusCode::OK,
Html(format!(
r#"<pre>http{}://{}/{} -> <a href="{}"">{}</a></pre>"#,
if state.uses_https { "s" } else { "" },
state.host,
id.id,
form.url.as_str(),
form.url.as_str(),
)),
)
.into_response();
}
Err(err) => {
warn!("{}", err);
return (StatusCode::INTERNAL_SERVER_ERROR, Html("Internal error."))
.into_response();
}
}
} else if let Err(err) = try_id {
warn!("{}", err);
return (
StatusCode::INTERNAL_SERVER_ERROR,
Html(format!("Internal error: {err}")),
)
.into_response();
}
(StatusCode::INTERNAL_SERVER_ERROR, Html("Internal error.")).into_response()
}
async fn generate_id(form: CreateForm, state: ServerState) -> eyre::Result<NextId> {
if form.id.is_empty() {
let existing_row: Result<UrlRow, sqlx::Error> =
sqlx::query_as("SELECT * FROM chela.urls WHERE url = $1 AND custom_id = 'false'")
.bind(form.url.as_str())
.fetch_one(&state.db_pool)
.await;
if let Ok(row) = existing_row {
return Ok(NextId {
id: row.id,
index: None,
exists: true,
});
}
let next_index: NextIndex = sqlx::query_as(
"SELECT nextval(pg_get_serial_sequence('chela.urls', 'index')) as new_index",
)
.fetch_one(&state.db_pool)
.await?;
if let Some(index) = next_index.new_index {
let new_id = state.sqids.encode(&[index.try_into()?])?;
return Ok(NextId {
id: new_id,
index: Some(index),
exists: false,
});
}
} else {
let existing_row: Result<UrlRow, sqlx::Error> =
sqlx::query_as("SELECT * FROM chela.urls WHERE id = $1")
.bind(form.id.clone())
.fetch_one(&state.db_pool)
.await;
if let Ok(row) = existing_row {
if row.url == form.url.as_str() {
return Ok(NextId {
id: row.id,
index: None,
exists: true,
});
}
return Err(eyre::eyre!("id '{}' is already taken", row.id));
}
return Ok(NextId {
id: form.id,
index: None,
exists: false,
});
}
Err(eyre::eyre!("Internal error"))
}
|
