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|
use sqlx::{sqlite::Sqlite, SqliteConnection, Transaction};
use crate::{
clock::DateTime,
events::types,
repo::{
channel::{self, Channel},
login::{self, Login},
message::{self, Message},
sequence::Sequence,
},
};
pub trait Provider {
fn message_events(&mut self) -> Events;
}
impl<'c> Provider for Transaction<'c, Sqlite> {
fn message_events(&mut self) -> Events {
Events(self)
}
}
pub struct Events<'t>(&'t mut SqliteConnection);
impl<'c> Events<'c> {
pub async fn create(
&mut self,
sender: &Login,
channel: &Channel,
sent_at: &DateTime,
sent_sequence: Sequence,
body: &str,
) -> Result<types::ChannelEvent, sqlx::Error> {
let id = message::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: message::Id",
sender as "sender: login::Id",
sent_at as "sent_at: DateTime",
sent_sequence as "sent_sequence: Sequence",
body
"#,
id,
channel.id,
sender.id,
sent_at,
sent_sequence,
body,
)
.map(|row| types::ChannelEvent {
sequence: row.sent_sequence,
at: row.sent_at,
data: types::MessageEvent {
channel: channel.clone(),
sender: sender.clone(),
message: Message {
id: row.id,
body: row.body,
},
}
.into(),
})
.fetch_one(&mut *self.0)
.await?;
Ok(message)
}
pub async fn delete(
&mut self,
channel: &Channel,
message: &message::Id,
deleted_at: &DateTime,
deleted_sequence: Sequence,
) -> Result<types::ChannelEvent, sqlx::Error> {
sqlx::query_scalar!(
r#"
delete from message
where id = $1
returning 1 as "row: i64"
"#,
message,
)
.fetch_one(&mut *self.0)
.await?;
Ok(types::ChannelEvent {
sequence: deleted_sequence,
at: *deleted_at,
data: types::MessageDeletedEvent {
channel: channel.clone(),
message: message.clone(),
}
.into(),
})
}
pub async fn expired(
&mut self,
expire_at: &DateTime,
) -> Result<Vec<(Channel, message::Id)>, sqlx::Error> {
let messages = sqlx::query!(
r#"
select
channel.id as "channel_id: channel::Id",
channel.name as "channel_name",
channel.created_at as "channel_created_at: DateTime",
channel.created_sequence as "channel_created_sequence: Sequence",
message.id as "message: message::Id"
from message
join channel on message.channel = channel.id
join login as sender on message.sender = sender.id
where sent_at < $1
"#,
expire_at,
)
.map(|row| {
(
Channel {
id: row.channel_id,
name: row.channel_name,
created_at: row.channel_created_at,
created_sequence: row.channel_created_sequence,
},
row.message,
)
})
.fetch_all(&mut *self.0)
.await?;
Ok(messages)
}
pub async fn replay(
&mut self,
resume_at: Option<Sequence>,
) -> Result<Vec<types::ChannelEvent>, sqlx::Error> {
let events = sqlx::query!(
r#"
select
message.id as "id: message::Id",
channel.id as "channel_id: channel::Id",
channel.name as "channel_name",
channel.created_at as "channel_created_at: DateTime",
channel.created_sequence as "channel_created_sequence: Sequence",
sender.id as "sender_id: login::Id",
sender.name as sender_name,
message.sent_at as "sent_at: DateTime",
message.sent_sequence as "sent_sequence: Sequence",
message.body
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)
order by sent_sequence asc
"#,
resume_at,
)
.map(|row| types::ChannelEvent {
sequence: row.sent_sequence,
at: row.sent_at,
data: types::MessageEvent {
channel: Channel {
id: row.channel_id,
name: row.channel_name,
created_at: row.channel_created_at,
created_sequence: row.channel_created_sequence,
},
sender: login::Login {
id: row.sender_id,
name: row.sender_name,
},
message: Message {
id: row.id,
body: row.body,
},
}
.into(),
})
.fetch_all(&mut *self.0)
.await?;
Ok(events)
}
}
|
