casbin/
convert.rs

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
#![allow(non_snake_case)]
use crate::{Adapter, DefaultModel, Model, NullAdapter, Result};

#[cfg(not(target_arch = "wasm32"))]
use crate::FileAdapter;

use async_trait::async_trait;
use rhai::{serde::to_dynamic, Dynamic};
use serde::Serialize;

use std::{
    collections::hash_map::DefaultHasher,
    hash::{Hash, Hasher},
};

#[async_trait]
pub trait TryIntoModel: Send + Sync {
    async fn try_into_model(self) -> Result<Box<dyn Model>>;
}

#[async_trait]
pub trait TryIntoAdapter: Send + Sync {
    async fn try_into_adapter(self) -> Result<Box<dyn Adapter>>;
}

#[async_trait]
impl TryIntoModel for &'static str {
    async fn try_into_model(self) -> Result<Box<dyn Model>> {
        #[cfg(not(target_arch = "wasm32"))]
        {
            Ok(Box::new(DefaultModel::from_file(self).await?))
        }
        #[cfg(target_arch = "wasm32")]
        {
            Ok(Box::new(DefaultModel::from_str(self).await?))
        }
    }
}

#[async_trait]
impl<T> TryIntoModel for Option<T>
where
    T: TryIntoModel,
{
    #[allow(clippy::box_default)]
    async fn try_into_model(self) -> Result<Box<dyn Model>> {
        if let Some(m) = self {
            m.try_into_model().await
        } else {
            Ok(Box::new(DefaultModel::default()))
        }
    }
}

#[async_trait]
impl TryIntoAdapter for &'static str {
    async fn try_into_adapter(self) -> Result<Box<dyn Adapter>> {
        #[cfg(not(target_arch = "wasm32"))]
        {
            Ok(Box::new(FileAdapter::new(self)))
        }

        #[cfg(target_arch = "wasm32")]
        {
            Ok(Box::new(NullAdapter))
        }
    }
}

#[async_trait]
impl<T> TryIntoAdapter for Option<T>
where
    T: TryIntoAdapter,
{
    async fn try_into_adapter(self) -> Result<Box<dyn Adapter>> {
        if let Some(a) = self {
            a.try_into_adapter().await
        } else {
            Ok(Box::new(NullAdapter))
        }
    }
}

#[allow(clippy::unit_arg)]
#[async_trait]
impl TryIntoAdapter for () {
    async fn try_into_adapter(self) -> Result<Box<dyn Adapter>> {
        Ok(Box::new(NullAdapter))
    }
}

#[async_trait]
impl<T> TryIntoModel for T
where
    T: Model + 'static,
{
    async fn try_into_model(self) -> Result<Box<dyn Model>> {
        Ok(Box::new(self))
    }
}

#[async_trait]
impl<T> TryIntoAdapter for T
where
    T: Adapter + 'static,
{
    async fn try_into_adapter(self) -> Result<Box<dyn Adapter>> {
        Ok(Box::new(self))
    }
}

pub trait EnforceArgs {
    fn try_into_vec(self) -> Result<Vec<Dynamic>>;
    fn cache_key(&self) -> u64;
}

impl<T> EnforceArgs for Vec<T>
where
    T: Into<Dynamic> + Hash + Clone,
{
    fn try_into_vec(self) -> Result<Vec<Dynamic>> {
        Ok(self.into_iter().map(|x| x.into()).collect())
    }

    fn cache_key(&self) -> u64 {
        let mut hasher = DefaultHasher::new();
        self.hash(&mut hasher);
        hasher.finish()
    }
}

macro_rules! impl_args {
    ($($p:ident),*) => {
        impl<$($p: Serialize + Hash),*> EnforceArgs for ($($p,)*)
        {
            fn try_into_vec(self) -> Result<Vec<Dynamic>> {
                let ($($p,)*) = self;
                let _v = vec![$(to_dynamic($p)?,)*];

                Ok(_v)
            }

            fn cache_key(&self) -> u64 {
                let ($($p,)*) = self;
                let mut _hasher = DefaultHasher::new();

                $($p.hash(&mut _hasher);)*

                _hasher.finish()
            }
        }

        impl_args!(@pop $($p),*);
    };
    (@pop) => {
    };
    (@pop $head:ident) => {
        impl_args!();
    };
    (@pop $head:ident $(, $tail:ident)+) => {
        impl_args!($($tail),*);
    };
}

impl_args!(A, B, C, D, E, F, G, H, J, K, L, M, N, P, Q, R, S, T, U, V);