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

use anyhow::bail;
use bc_components::tags;
use dcbor::prelude::*;
use crate::{string_utils::StringUtils, impl_envelope_encodable, EnvelopeEncodable};

use super::ParametersStore;

#[derive(Clone, Debug, Eq)]
pub enum ParameterName {
    Static(&'static str),
    Dynamic(String),
}

impl ParameterName {
    fn value(&self) -> &str {
        match self {
            Self::Static(name) => name,
            Self::Dynamic(name) => name,
        }
    }
}

impl PartialEq for ParameterName {
    fn eq(&self, other: &Self) -> bool {
        self.value() == other.value()
    }
}

impl std::hash::Hash for ParameterName {
    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
        self.value().hash(state)
    }
}

/// A declared parameter.
#[derive(Clone, Debug, Eq)]
pub enum Parameter {
    Known(u64, Option<ParameterName>),
    Named(ParameterName),
}

impl Parameter {
    /// Creates a new parameter with a value and an optional name.
    pub fn new_known(value: u64, name: Option<String>) -> Self {
        Self::Known(value, name.map(ParameterName::Dynamic))
    }

    /// Creates a new parameter with a name. This call cannot be used
    /// to declare a parameter at compile-time.
    pub fn new_named(name: &str) -> Self {
        Self::Named(ParameterName::Dynamic(name.into()))
    }

    /// Creates a new parameter with a value and a static name.
    /// This call can be used to declare a parameter at compile-time.
    pub const fn new_with_static_name(value: u64, name: &'static str) -> Self {
        Self::Known(value, Some(ParameterName::Static(name)))
    }

    /// Creates a new parameter with a static name.
    /// This call can be used to declare a parameter at compile-time.
    pub const fn new_static_named(name: &'static str) -> Self {
        Self::Named(ParameterName::Static(name))
    }

    /// Returns the name of the parameter.
    pub fn name(&self) -> String {
        match self {
            Self::Known(value, name) => {
                if let Some(name) = name {
                    name.value().to_string()
                } else {
                    value.to_string()
                }
            },
            Self::Named(name) => name.value().to_string().flanked_by("\"", "\""),
        }
    }
}

impl PartialEq for Parameter {
    fn eq(&self, other: &Self) -> bool {
        match (self, other) {
            (Self::Known(l, _), Self::Known(r, _)) => l == r,
            (Self::Named(l), Self::Named(r)) => l == r,
            _ => false,
        }
    }
}

impl std::hash::Hash for Parameter {
    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
        match self {
            Self::Known(value, _) => value.hash(state),
            Self::Named(name) => name.hash(state),
        }
    }
}

impl From<u64> for Parameter {
    fn from(value: u64) -> Self {
        Self::new_known(value, None)
    }
}

impl From<&str> for Parameter {
    fn from(name: &str) -> Self {
        Self::new_named(name)
    }
}

impl From<&Parameter> for Parameter {
    fn from(parameter: &Parameter) -> Self {
        parameter.clone()
    }
}

impl CBORTagged for Parameter {
    const CBOR_TAG: Tag = tags::PARAMETER;
}

impl CBOREncodable for Parameter {
    fn cbor(&self) -> CBOR {
        self.tagged_cbor()
    }
}

impl From<Parameter> for CBOR {
    fn from(value: Parameter) -> Self {
        value.cbor()
    }
}

impl CBORTaggedEncodable for Parameter {
    fn untagged_cbor(&self) -> CBOR {
        match self {
            Parameter::Known(value, _) => value.cbor(),
            Parameter::Named(name) => name.value().cbor(),
        }
    }
}

impl CBORDecodable for Parameter {
    fn from_cbor(cbor: &CBOR) -> anyhow::Result<Self> {
        Self::from_tagged_cbor(cbor)
    }
}

impl TryFrom<CBOR> for Parameter {
    type Error = anyhow::Error;

    fn try_from(cbor: CBOR) -> Result<Self, Self::Error> {
        Self::from_cbor(&cbor)
    }
}

impl CBORTaggedDecodable for Parameter {
    fn from_untagged_cbor(untagged_cbor: &CBOR) -> anyhow::Result<Self> {
        match untagged_cbor.case() {
            CBORCase::Unsigned(value) => Ok(Self::new_known(*value, None)),
            CBORCase::Text(name) => Ok(Self::new_named(name)),
            _ => bail!("invalid parameter"),
        }
    }
}

impl Parameter {
    fn description(&self, parameters: Option<&ParametersStore>) -> String {
        match self {
            Parameter::Known(_, _) => {
                ParametersStore::name_for_parameter(self, parameters)
            },
            Parameter::Named(name) => {
                format!("\"{}\"", name.value())
            },
        }
    }
}

impl std::fmt::Display for Parameter {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.description(None))
    }
}

impl_envelope_encodable!(Parameter);