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|
use sqlx::{sqlite::Sqlite, SqliteConnection, Transaction};
use super::{snapshot::Message, History, Id};
use crate::{
channel::{self, Channel},
clock::DateTime,
event::{Instant, Sequence},
login::{self, Login},
};
pub trait Provider {
fn messages(&mut self) -> Messages;
}
impl<'c> Provider for Transaction<'c, Sqlite> {
fn messages(&mut self) -> Messages {
Messages(self)
}
}
pub struct Messages<'t>(&'t mut SqliteConnection);
impl<'c> Messages<'c> {
pub async fn create(
&mut self,
channel: &Channel,
sender: &Login,
sent: &Instant,
body: &str,
) -> Result<History, sqlx::Error> {
let id = Id::generate();
let message = sqlx::query!(
r#"
insert into message
(id, channel, sender, sent_at, sent_sequence, body)
values ($1, $2, $3, $4, $5, $6)
returning
id as "id: Id",
body
"#,
id,
channel.id,
sender.id,
sent.at,
sent.sequence,
body,
)
.map(|row| History {
message: Message {
sent: *sent,
channel: channel.clone(),
sender: sender.clone(),
id: row.id,
body: row.body,
},
deleted: None,
})
.fetch_one(&mut *self.0)
.await?;
Ok(message)
}
pub async fn in_channel(
&mut self,
channel: &Channel,
resume_at: Option<Sequence>,
) -> Result<Vec<History>, sqlx::Error> {
let messages = sqlx::query!(
r#"
select
channel.id as "channel_id: channel::Id",
channel.name as "channel_name",
sender.id as "sender_id: login::Id",
sender.name as "sender_name",
message.id as "id: Id",
message.body,
sent_at as "sent_at: DateTime",
sent_sequence as "sent_sequence: Sequence"
from message
join channel on message.channel = channel.id
join login as sender on message.sender = sender.id
where channel.id = $1
and coalesce(message.sent_sequence <= $2, true)
order by message.sent_sequence
"#,
channel.id,
resume_at,
)
.map(|row| History {
message: Message {
sent: Instant {
at: row.sent_at,
sequence: row.sent_sequence,
},
channel: Channel {
id: row.channel_id,
name: row.channel_name,
},
sender: Login {
id: row.sender_id,
name: row.sender_name,
},
id: row.id,
body: row.body,
},
deleted: None,
})
.fetch_all(&mut *self.0)
.await?;
Ok(messages)
}
async fn by_id(&mut self, message: &Id) -> Result<History, sqlx::Error> {
let message = sqlx::query!(
r#"
select
channel.id as "channel_id: channel::Id",
channel.name as "channel_name",
sender.id as "sender_id: login::Id",
sender.name as "sender_name",
message.id as "id: Id",
message.body,
sent_at as "sent_at: DateTime",
sent_sequence as "sent_sequence: Sequence"
from message
join channel on message.channel = channel.id
join login as sender on message.sender = sender.id
where message.id = $1
"#,
message,
)
.map(|row| History {
message: Message {
sent: Instant {
at: row.sent_at,
sequence: row.sent_sequence,
},
channel: Channel {
id: row.channel_id,
name: row.channel_name,
},
sender: Login {
id: row.sender_id,
name: row.sender_name,
},
id: row.id,
body: row.body,
},
deleted: None,
})
.fetch_one(&mut *self.0)
.await?;
Ok(message)
}
pub async fn delete(
&mut self,
message: &Id,
deleted: &Instant,
) -> Result<History, sqlx::Error> {
let history = self.by_id(message).await?;
sqlx::query_scalar!(
r#"
delete from message
where
id = $1
returning 1 as "deleted: i64"
"#,
history.message.id,
)
.fetch_one(&mut *self.0)
.await?;
Ok(History {
deleted: Some(*deleted),
..history
})
}
pub async fn expired(&mut self, expire_at: &DateTime) -> Result<Vec<Id>, sqlx::Error> {
let messages = sqlx::query_scalar!(
r#"
select
id as "message: Id"
from message
where sent_at < $1
"#,
expire_at,
)
.fetch_all(&mut *self.0)
.await?;
Ok(messages)
}
pub async fn replay(
&mut self,
resume_at: Option<Sequence>,
) -> Result<Vec<History>, sqlx::Error> {
let messages = sqlx::query!(
r#"
select
channel.id as "channel_id: channel::Id",
channel.name as "channel_name",
sender.id as "sender_id: login::Id",
sender.name as "sender_name",
message.id as "id: Id",
message.body,
sent_at as "sent_at: DateTime",
sent_sequence as "sent_sequence: Sequence"
from message
join channel on message.channel = channel.id
join login as sender on message.sender = sender.id
where coalesce(message.sent_sequence > $1, true)
"#,
resume_at,
)
.map(|row| History {
message: Message {
sent: Instant {
at: row.sent_at,
sequence: row.sent_sequence,
},
channel: Channel {
id: row.channel_id,
name: row.channel_name,
},
sender: Login {
id: row.sender_id,
name: row.sender_name,
},
id: row.id,
body: row.body,
},
deleted: None,
})
.fetch_all(&mut *self.0)
.await?;
Ok(messages)
}
}
|
