oiseau 0.3.0

Super simple SQL helper
Documentation 
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

#[cfg(not(feature = "redis"))]
use crate::cache::no_cache::NoCache;
#[cfg(feature = "redis")]
use crate::cache::redis::RedisCache;

use crate::{cache::Cache, config::Configuration};

use bb8_postgres::{
    PostgresConnectionManager,
    bb8::{Pool, PooledConnection},
};
use std::str::FromStr;
use tokio_postgres::{Config as PgConfig, NoTls, Row, types::ToSql};

pub type Result<T> = std::result::Result<T, tokio_postgres::Error>;
pub type Connection<'a> = PooledConnection<'a, PostgresConnectionManager<NoTls>>;

#[derive(Clone)]
pub struct DataManager<T: Clone + Configuration>(
    pub T,
    #[cfg(feature = "redis")] pub RedisCache,
    #[cfg(not(feature = "redis"))] pub NoCache,
    pub Pool<PostgresConnectionManager<NoTls>>,
);

impl<T: Clone + Configuration> DataManager<T> {
    /// Obtain a connection to the staging database.
    pub async fn connect(&self) -> Result<Connection<'_>> {
        Ok(self.2.get().await.expect("ERROR_OISEAU_PSQL_CON"))
    }

    /// Create a new [`DataManager`] (and init database).
    pub async fn new(config: T) -> Result<Self> {
        let db_config = config.db_config();
        let con_url = &format!(
            "postgresql://{}:{}@{}/{}?target_session_attrs=read-write",
            db_config.user, db_config.password, db_config.url, db_config.name
        );

        println!("attempting connection on: {con_url}");
        let manager = PostgresConnectionManager::new(PgConfig::from_str(con_url).unwrap(), NoTls);

        let pool = Pool::builder().max_size(15).build(manager).await.unwrap();
        Ok(Self(
            config.clone(),
            #[cfg(feature = "redis")]
            RedisCache::new().await,
            #[cfg(not(feature = "redis"))]
            NoCache::new().await,
            pool,
        ))
    }
}

#[macro_export]
macro_rules! pg_get {
    ($row:ident->$idx:literal($t:ty)) => {
        $row.get::<usize, Option<$t>>($idx).unwrap()
    };

    ($row:ident->$idx:literal($t:ty) default ($default:expr)) => {
        $row.get::<usize, Option<$t>>($idx).unwrap_or($default)
    };

    ($row:ident->$idx:ident($t:ty)) => {
        $row.get::<usize, Option<$t>>($idx).unwrap()
    };

    ($row:ident->$idx:ident($t:ty) default ($default:expr)) => {
        $row.get::<usize, Option<$t>>($idx).unwrap_or($default)
    };
}

pub async fn query_row_helper<T, F>(
    conn: &Connection<'_>,
    sql: &str,
    params: &[&(dyn ToSql + Sync)],
    f: F,
) -> Result<T>
where
    F: FnOnce(&Row) -> Result<T>,
{
    let query = conn.prepare(sql).await.unwrap();
    let res = conn.query_one(&query, params).await;

    if let Ok(row) = res {
        Ok(f(&row).unwrap())
    } else {
        Err(res.unwrap_err())
    }
}

#[macro_export]
macro_rules! pg_query_row {
    ($conn:expr, $sql:expr, $params:expr, $f:expr) => {
        $crate::postgres::query_row_helper($conn, $sql, $params, $f).await
    };
}

pub async fn query_rows_helper<T, F>(
    conn: &Connection<'_>,
    sql: &str,
    params: &[&(dyn ToSql + Sync)],
    mut f: F,
) -> Result<Vec<T>>
where
    F: FnMut(&Row) -> T,
{
    let query = conn.prepare(sql).await.unwrap();
    let res = conn.query(&query, params).await;

    if let Ok(rows) = res {
        let mut out = Vec::new();

        for row in rows {
            out.push(f(&row));
        }

        return Ok(out);
    } else {
        Err(res.unwrap_err())
    }
}

#[macro_export]
macro_rules! pg_query_rows {
    ($conn:expr, $sql:expr, $params:expr, $f:expr) => {
        $crate::postgres::query_rows_helper($conn, $sql, $params, $f).await
    };
}

pub async fn execute_helper(
    conn: &Connection<'_>,
    sql: &str,
    params: &[&(dyn ToSql + Sync)],
) -> Result<()> {
    let query = conn.prepare(sql).await.unwrap();
    conn.execute(&query, params).await?;
    Ok(())
}

#[macro_export]
macro_rules! pg_execute {
    ($conn:expr, $sql:expr, $params:expr) => {
        $crate::postgres::execute_helper($conn, $sql, $params).await
    };

    ($conn:expr, $sql:expr) => {
        $crate::postgres::execute_helper($conn, $sql, &[]).await
    };
}

#[macro_export]
macro_rules! pg_params {
    () => {
        &[]
    };
    ($($x:expr),+ $(,)?) => {
        &[$(&$x),+]
    };
}