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
// Copyright 2021-2023 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use std::sync::Arc;

use apalis_core::{executor::TokioExecutor, layers::extensions::Extension, monitor::Monitor};
use mas_email::Mailer;
use mas_matrix::HomeserverConnection;
use mas_storage::{BoxClock, BoxRepository, Repository, SystemClock};
use mas_storage_pg::{DatabaseError, PgRepository};
use rand::SeedableRng;
use sqlx::{Pool, Postgres};
use tracing::debug;

use crate::storage::PostgresStorageFactory;

mod database;
mod email;
mod matrix;
mod storage;
mod user;
mod utils;

#[derive(Clone)]
struct State {
    pool: Pool<Postgres>,
    mailer: Mailer,
    clock: SystemClock,
    homeserver: Arc<dyn HomeserverConnection<Error = anyhow::Error>>,
}

impl State {
    pub fn new(
        pool: Pool<Postgres>,
        clock: SystemClock,
        mailer: Mailer,
        homeserver: impl HomeserverConnection<Error = anyhow::Error> + 'static,
    ) -> Self {
        Self {
            pool,
            mailer,
            clock,
            homeserver: Arc::new(homeserver),
        }
    }

    pub fn inject(&self) -> Extension<Self> {
        Extension(self.clone())
    }

    pub fn pool(&self) -> &Pool<Postgres> {
        &self.pool
    }

    pub fn clock(&self) -> BoxClock {
        Box::new(self.clock.clone())
    }

    pub fn mailer(&self) -> &Mailer {
        &self.mailer
    }

    // This is fine for now, we may move that to a trait at some point.
    #[allow(clippy::unused_self, clippy::disallowed_methods)]
    pub fn rng(&self) -> rand_chacha::ChaChaRng {
        rand_chacha::ChaChaRng::from_rng(rand::thread_rng()).expect("failed to seed rng")
    }

    pub async fn repository(&self) -> Result<BoxRepository, DatabaseError> {
        let repo = PgRepository::from_pool(self.pool())
            .await?
            .map_err(mas_storage::RepositoryError::from_error)
            .boxed();

        Ok(repo)
    }

    pub fn matrix_connection(&self) -> &dyn HomeserverConnection<Error = anyhow::Error> {
        self.homeserver.as_ref()
    }
}

trait JobContextExt {
    fn state(&self) -> State;
}

impl JobContextExt for apalis_core::context::JobContext {
    fn state(&self) -> State {
        self.data_opt::<State>()
            .expect("state not injected in job context")
            .clone()
    }
}

/// Helper macro to build a storage-backed worker.
macro_rules! build {
    ($job:ty => $fn:ident, $suffix:expr, $state:expr, $factory:expr) => {{
        let storage = $factory.build();
        let worker_name = format!(
            "{job}-{suffix}",
            job = <$job as ::apalis_core::job::Job>::NAME,
            suffix = $suffix
        );

        let builder = ::apalis_core::builder::WorkerBuilder::new(worker_name)
            .layer($state.inject())
            .layer(crate::utils::trace_layer())
            .layer(crate::utils::metrics_layer());

        let builder = ::apalis_core::storage::builder::WithStorage::with_storage_config(
            builder,
            storage,
            |c| c.fetch_interval(std::time::Duration::from_secs(1)),
        );
        ::apalis_core::builder::WorkerFactory::build(builder, ::apalis_core::job_fn::job_fn($fn))
    }};
}

pub(crate) use build;

/// Initialise the workers.
///
/// # Errors
///
/// This function can fail if the database connection fails.
pub async fn init(
    name: &str,
    pool: &Pool<Postgres>,
    mailer: &Mailer,
    homeserver: impl HomeserverConnection<Error = anyhow::Error> + 'static,
) -> Result<Monitor<TokioExecutor>, sqlx::Error> {
    let state = State::new(
        pool.clone(),
        SystemClock::default(),
        mailer.clone(),
        homeserver,
    );
    let factory = PostgresStorageFactory::new(pool.clone());
    let monitor = Monitor::new().executor(TokioExecutor::new());
    let monitor = self::database::register(name, monitor, &state);
    let monitor = self::email::register(name, monitor, &state, &factory);
    let monitor = self::matrix::register(name, monitor, &state, &factory);
    let monitor = self::user::register(name, monitor, &state, &factory);
    // TODO: we might want to grab the join handle here
    factory.listen().await?;
    debug!(?monitor, "workers registered");
    Ok(monitor)
}