stock-trek 0.5.3

Stock Trek time-series analysis
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

use crate::{
    error::result::{StockTrekError, StockTrekResult},
    resolved_context::ResolvedContext,
    scratch::value::ScratchValue,
};
use serde::{Deserialize, Serialize};
use std::{fmt::Display, marker::PhantomData};

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ScratchKey<T> {
    key: String,
    default: Option<T>,
    _phantom: PhantomData<T>,
}

impl<T> Display for ScratchKey<T>
where
    T: Clone
        + ScratchPadKeyType
        + Into<ScratchValue>
        + TryFrom<ScratchValue, Error = StockTrekError>,
{
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "ScratchPadKey::{}({})", T::KEY_NAME, &self.key)
    }
}

impl<T> ScratchKey<T>
where
    T: Clone
        + ScratchPadKeyType
        + Into<ScratchValue>
        + TryFrom<ScratchValue, Error = StockTrekError>,
{
    pub fn new_required(key: impl AsRef<str>) -> Self {
        Self {
            key: key.as_ref().to_string(),
            default: None,
            _phantom: PhantomData,
        }
    }
    pub fn new_optional(key: impl AsRef<str>, default: T) -> Self {
        Self {
            key: key.as_ref().to_string(),
            default: Some(default),
            _phantom: PhantomData,
        }
    }
    pub fn key(&self) -> &str {
        &self.key
    }
    pub fn default(&self) -> Option<T> {
        self.default.clone()
    }
    pub fn read(&self, c: &ResolvedContext) -> StockTrekResult<T> {
        c.scratch_pad.read(self)
    }
}

mod sealed {
    use crate::scratch::key::{ExchangeName, TokenName};

    pub trait Sealed {
        const KEY_NAME: &str;
    }
    impl Sealed for ExchangeName {
        const KEY_NAME: &str = "Exchange";
    }
    impl Sealed for TokenName {
        const KEY_NAME: &str = "Token";
    }
    impl Sealed for bool {
        const KEY_NAME: &str = "Flag";
    }
    impl Sealed for f64 {
        const KEY_NAME: &str = "Number";
    }
}

pub trait ScratchPadKeyType: sealed::Sealed {}

impl ScratchPadKeyType for ExchangeName {}
impl ScratchPadKeyType for TokenName {}
impl ScratchPadKeyType for bool {}
impl ScratchPadKeyType for f64 {}

#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub struct ExchangeName(pub String);

#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub struct TokenName(pub String);

macro_rules! impl_string_wrapper_key {
    ($name:ident) => {
        impl AsRef<str> for $name {
            fn as_ref(&self) -> &str {
                &self.0
            }
        }
        impl std::ops::Deref for $name {
            type Target = String;
            fn deref(&self) -> &String {
                &self.0
            }
        }
        impl std::ops::DerefMut for $name {
            fn deref_mut(&mut self) -> &mut String {
                &mut self.0
            }
        }
        impl From<String> for $name {
            fn from(s: String) -> Self {
                $name(s)
            }
        }
        impl From<&str> for $name {
            fn from(s: &str) -> Self {
                $name(s.to_string())
            }
        }
        impl std::fmt::Display for $name {
            fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
                write!(f, "{}", self.0)
            }
        }
        impl std::borrow::Borrow<str> for $name {
            fn borrow(&self) -> &str {
                &self.0
            }
        }
    };
}

impl_string_wrapper_key!(ExchangeName);
impl_string_wrapper_key!(TokenName);