battler-data 0.2.0

Data objects for battler.
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

use core::{
    fmt,
    fmt::Display,
};

use anyhow::Error;
use serde::{
    Deserialize,
    Serialize,
    Serializer,
    de::Visitor,
    ser::SerializeSeq,
};

/// The number of hits done by a multihit move.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum MultihitType {
    /// A static number of hits.
    Static(u8),
    /// A range of numbers to choose from.
    Range(u8, u8),
}

impl MultihitType {
    /// The minimum number of times the move can hit.
    pub fn min(&self) -> u8 {
        match self {
            Self::Static(val) => *val,
            Self::Range(min, _) => *min,
        }
    }

    /// The maximum number of times the move can hit.
    pub fn max(&self) -> u8 {
        match self {
            Self::Static(val) => *val,
            Self::Range(_, max) => *max,
        }
    }
}

impl Display for MultihitType {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        match self {
            Self::Static(n) => write!(f, "{n}"),
            Self::Range(begin, end) => write!(f, "[{begin},{end}]"),
        }
    }
}

impl From<u8> for MultihitType {
    fn from(value: u8) -> Self {
        Self::Static(value)
    }
}

impl TryFrom<&[u8]> for MultihitType {
    type Error = Error;
    fn try_from(value: &[u8]) -> Result<Self, Self::Error> {
        if value.len() != 2 {
            return Err(Error::msg("multihit range must contain exactly 2 elements"));
        }
        Ok(Self::Range(value[0], value[1]))
    }
}

impl Serialize for MultihitType {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: Serializer,
    {
        match self {
            Self::Static(n) => serializer.serialize_u8(*n),
            Self::Range(begin, end) => {
                let mut seq = serializer.serialize_seq(Some(2))?;
                seq.serialize_element(begin)?;
                seq.serialize_element(end)?;
                seq.end()
            }
        }
    }
}

struct MultihitTypeVisitor;

impl<'de> Visitor<'de> for MultihitTypeVisitor {
    type Value = MultihitType;

    fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
        write!(formatter, "an integer or an array of 2 integers")
    }

    fn visit_u8<E>(self, v: u8) -> Result<Self::Value, E>
    where
        E: serde::de::Error,
    {
        Ok(Self::Value::from(v))
    }

    fn visit_u64<E>(self, v: u64) -> Result<Self::Value, E>
    where
        E: serde::de::Error,
    {
        Ok(Self::Value::from(v as u8))
    }

    fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
    where
        A: serde::de::SeqAccess<'de>,
    {
        let begin = match seq.next_element()? {
            Some(v) => v,
            None => return Err(serde::de::Error::invalid_length(0, &self)),
        };
        let end = match seq.next_element()? {
            Some(v) => v,
            None => return Err(serde::de::Error::invalid_length(1, &self)),
        };
        if seq.next_element::<u8>()?.is_some() {
            return Err(serde::de::Error::invalid_length(3, &self));
        }
        Ok(Self::Value::Range(begin, end))
    }
}

impl<'de> Deserialize<'de> for MultihitType {
    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
    where
        D: serde::Deserializer<'de>,
    {
        deserializer.deserialize_any(MultihitTypeVisitor)
    }
}

#[cfg(test)]
mod multihit_type_test {
    use crate::{
        MultihitType,
        test_util::test_serialization,
    };

    #[test]
    fn serializes_to_string() {
        test_serialization(MultihitType::Static(2), 2);
        test_serialization(MultihitType::Range(1, 5), "[1,5]");
    }
}