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use futures::stream::{StreamExt as _, TryStreamExt as _};
use sqlx::{SqliteConnection, Transaction, sqlite::Sqlite};
use crate::{
clock::DateTime,
db::NotFound,
event::{Instant, Sequence},
login::Login,
name::{self, Name},
user::{History, Id, User},
};
pub trait Provider {
fn users(&mut self) -> Users<'_>;
}
impl Provider for Transaction<'_, Sqlite> {
fn users(&mut self) -> Users<'_> {
Users(self)
}
}
pub struct Users<'t>(&'t mut SqliteConnection);
impl Users<'_> {
pub async fn create(
&mut self,
login: &Login,
created: &Instant,
) -> Result<History, sqlx::Error> {
sqlx::query!(
r#"
insert into user (id, created_sequence, created_at)
values ($1, $2, $3)
"#,
login.id,
created.sequence,
created.at,
)
.execute(&mut *self.0)
.await?;
Ok(History {
user: User {
id: login.id.clone().into(),
name: login.name.clone(),
},
created: *created,
})
}
pub async fn by_login(&mut self, login: &Login) -> Result<History, LoadError> {
let user = sqlx::query!(
r#"
select
id as "id: Id",
login.display_name as "display_name: String",
login.canonical_name as "canonical_name: String",
user.created_at as "created_at: DateTime",
user.created_sequence as "created_sequence: Sequence"
from user
join login using (id)
where id = $1
"#,
login.id,
)
.map(|row| {
Ok::<_, LoadError>(History {
user: User {
id: row.id,
name: Name::new(row.display_name, row.canonical_name)?,
},
created: Instant::new(row.created_at, row.created_sequence),
})
})
.fetch_one(&mut *self.0)
.await??;
Ok(user)
}
pub async fn all(&mut self, resume_at: Sequence) -> Result<Vec<History>, LoadError> {
let logins = sqlx::query!(
r#"
select
id as "id: Id",
login.display_name as "display_name: String",
login.canonical_name as "canonical_name: String",
user.created_sequence as "created_sequence: Sequence",
user.created_at as "created_at: DateTime"
from user
join login using (id)
where user.created_sequence <= $1
order by canonical_name
"#,
resume_at,
)
.map(|row| {
Ok::<_, LoadError>(History {
user: User {
id: row.id,
name: Name::new(row.display_name, row.canonical_name)?,
},
created: Instant::new(row.created_at, row.created_sequence),
})
})
.fetch(&mut *self.0)
.map(|res| res?)
.try_collect()
.await?;
Ok(logins)
}
pub async fn replay(&mut self, resume_at: Sequence) -> Result<Vec<History>, LoadError> {
let logins = sqlx::query!(
r#"
select
id as "id: Id",
login.display_name as "display_name: String",
login.canonical_name as "canonical_name: String",
user.created_sequence as "created_sequence: Sequence",
user.created_at as "created_at: DateTime"
from user
join login using (id)
where user.created_sequence > $1
"#,
resume_at,
)
.map(|row| {
Ok::<_, name::Error>(History {
user: User {
id: row.id,
name: Name::new(row.display_name, row.canonical_name)?,
},
created: Instant::new(row.created_at, row.created_sequence),
})
})
.fetch(&mut *self.0)
.map(|res| Ok::<_, LoadError>(res??))
.try_collect()
.await?;
Ok(logins)
}
}
#[derive(Debug, thiserror::Error)]
#[error(transparent)]
pub enum LoadError {
Database(#[from] sqlx::Error),
Name(#[from] name::Error),
}
impl<T> NotFound for Result<T, LoadError> {
type Ok = T;
type Error = LoadError;
fn optional(self) -> Result<Option<T>, LoadError> {
match self {
Ok(value) => Ok(Some(value)),
Err(LoadError::Database(sqlx::Error::RowNotFound)) => Ok(None),
Err(other) => Err(other),
}
}
}
|
