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|
use sqlx::{sqlite::Sqlite, SqliteConnection, Transaction};
use crate::{
channel::{Channel, Id},
clock::DateTime,
event::{types, Sequence},
};
pub trait Provider {
fn channels(&mut self) -> Channels;
}
impl<'c> Provider for Transaction<'c, Sqlite> {
fn channels(&mut self) -> Channels {
Channels(self)
}
}
pub struct Channels<'t>(&'t mut SqliteConnection);
impl<'c> Channels<'c> {
pub async fn create(
&mut self,
name: &str,
created_at: &DateTime,
created_sequence: Sequence,
) -> Result<Channel, sqlx::Error> {
let id = Id::generate();
let channel = sqlx::query_as!(
Channel,
r#"
insert
into channel (id, name, created_at, created_sequence)
values ($1, $2, $3, $4)
returning
id as "id: Id",
name,
created_at as "created_at: DateTime",
created_sequence as "created_sequence: Sequence"
"#,
id,
name,
created_at,
created_sequence,
)
.fetch_one(&mut *self.0)
.await?;
Ok(channel)
}
pub async fn by_id(&mut self, channel: &Id) -> Result<Channel, sqlx::Error> {
let channel = sqlx::query_as!(
Channel,
r#"
select
id as "id: Id",
name,
created_at as "created_at: DateTime",
created_sequence as "created_sequence: Sequence"
from channel
where id = $1
"#,
channel,
)
.fetch_one(&mut *self.0)
.await?;
Ok(channel)
}
pub async fn all(
&mut self,
resume_point: Option<Sequence>,
) -> Result<Vec<Channel>, sqlx::Error> {
let channels = sqlx::query_as!(
Channel,
r#"
select
id as "id: Id",
name,
created_at as "created_at: DateTime",
created_sequence as "created_sequence: Sequence"
from channel
where coalesce(created_sequence <= $1, true)
order by channel.name
"#,
resume_point,
)
.fetch_all(&mut *self.0)
.await?;
Ok(channels)
}
pub async fn replay(
&mut self,
resume_at: Option<Sequence>,
) -> Result<Vec<Channel>, sqlx::Error> {
let channels = sqlx::query_as!(
Channel,
r#"
select
id as "id: Id",
name,
created_at as "created_at: DateTime",
created_sequence as "created_sequence: Sequence"
from channel
where coalesce(created_sequence > $1, true)
"#,
resume_at,
)
.fetch_all(&mut *self.0)
.await?;
Ok(channels)
}
pub async fn delete(
&mut self,
channel: &Channel,
deleted_at: &DateTime,
deleted_sequence: Sequence,
) -> Result<types::ChannelEvent, sqlx::Error> {
let channel = channel.id.clone();
sqlx::query_scalar!(
r#"
delete from channel
where id = $1
returning 1 as "row: i64"
"#,
channel,
)
.fetch_one(&mut *self.0)
.await?;
Ok(types::ChannelEvent {
sequence: deleted_sequence,
at: *deleted_at,
data: types::DeletedEvent { channel }.into(),
})
}
pub async fn expired(&mut self, expired_at: &DateTime) -> Result<Vec<Channel>, sqlx::Error> {
let channels = sqlx::query_as!(
Channel,
r#"
select
channel.id as "id: Id",
channel.name,
channel.created_at as "created_at: DateTime",
channel.created_sequence as "created_sequence: Sequence"
from channel
left join message
where created_at < $1
and message.id is null
"#,
expired_at,
)
.fetch_all(&mut *self.0)
.await?;
Ok(channels)
}
}
|
