1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
use sqlx::{sqlite::Sqlite, SqliteConnection, Transaction};
use super::{snapshot::Message, History, Id};
use crate::{
channel,
clock::DateTime,
event::{Instant, ResumePoint, 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::History,
sender: &Login,
sent: &Instant,
body: &str,
) -> Result<History, sqlx::Error> {
let id = Id::generate();
let channel_id = channel.id();
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",
channel as "channel: channel::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| History {
message: Message {
sent: Instant {
at: row.sent_at,
sequence: row.sent_sequence,
},
channel: row.channel,
sender: row.sender,
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::History,
resume_at: ResumePoint,
) -> Result<Vec<History>, sqlx::Error> {
let channel_id = channel.id();
let messages = sqlx::query!(
r#"
select
channel as "channel: channel::Id",
sender as "sender: login::Id",
id as "id: Id",
body,
sent_at as "sent_at: DateTime",
sent_sequence as "sent_sequence: Sequence"
from message
where channel = $1
and coalesce(sent_sequence <= $2, true)
order by sent_sequence
"#,
channel_id,
resume_at,
)
.map(|row| History {
message: Message {
sent: Instant {
at: row.sent_at,
sequence: row.sent_sequence,
},
channel: row.channel,
sender: row.sender,
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 as "channel: channel::Id",
sender as "sender: login::Id",
id as "id: Id",
body,
sent_at as "sent_at: DateTime",
sent_sequence as "sent_sequence: Sequence"
from message
where id = $1
"#,
message,
)
.map(|row| History {
message: Message {
sent: Instant {
at: row.sent_at,
sequence: row.sent_sequence,
},
channel: row.channel,
sender: row.sender,
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: ResumePoint) -> Result<Vec<History>, sqlx::Error> {
let messages = sqlx::query!(
r#"
select
channel as "channel: channel::Id",
sender as "sender: login::Id",
id as "id: Id",
body,
sent_at as "sent_at: DateTime",
sent_sequence as "sent_sequence: Sequence"
from message
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: row.channel,
sender: row.sender,
id: row.id,
body: row.body,
},
deleted: None,
})
.fetch_all(&mut *self.0)
.await?;
Ok(messages)
}
}
|
