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

//! The LEGO data format
#[cfg(feature = "serde-derives")]
use serde::Serialize;
use std::{collections::BTreeMap, fmt::Debug, str::FromStr};

/// A LEGO-Data-Format value
#[derive(PartialEq)]
pub enum Value {
    /// A user-facing string
    String(String),
    /// A signed 32bit integer
    I32(i32),
    /// A single precision floating point number
    F32(f32),
    /// An unsigned 32bit interger
    U32(u32),
    /// A boolean (0 or 1)
    Bool(bool),
    /// An internal string
    Bytes(String),
}

#[cfg(feature = "serde-derives")]
impl Serialize for Value {
    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
    where
        S: serde::Serializer,
    {
        match self {
            Self::String(s) => serializer.serialize_str(s.as_str()),
            Self::I32(i) => serializer.serialize_i32(*i),
            Self::F32(i) => serializer.serialize_f32(*i),
            Self::U32(i) => serializer.serialize_u32(*i),
            Self::Bool(b) => serializer.serialize_bool(*b),
            Self::Bytes(b) => serializer.serialize_str(b.as_str()),
        }
    }
}

impl Debug for Value {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::String(s) => s.fmt(f),
            Self::I32(i) => i.fmt(f),
            Self::F32(l) => l.fmt(f),
            Self::U32(u) => u.fmt(f),
            Self::Bool(b) => b.fmt(f),
            Self::Bytes(s) => {
                write!(f, "b")?;
                s.fmt(f)
            }
        }
    }
}

/// A table of LDF values
#[cfg_attr(feature = "serde-derives", derive(Serialize))]
#[cfg_attr(feature = "serde-derives", serde(transparent))]
pub struct LDF {
    /// The contained map
    pub map: BTreeMap<String, Value>,
}

impl Debug for LDF {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        let mut d = f.debug_struct("LDF");
        for (name, value) in self.map.iter() {
            d.field(name, value);
        }
        d.finish()
    }
}

/// Error when parsing LDF
#[derive(Debug)]
#[allow(dead_code)]
pub struct LDFError(u8, String);

impl FromStr for LDF {
    type Err = LDFError;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        s.split('\n')
            .try_fold(BTreeMap::new(), |mut x, y| {
                let mut out = y.splitn(2, '=');
                let key = out.next().unwrap();
                let val = out.next().ok_or_else(|| LDFError(0, key.to_string()))?;
                let mut inn = val.splitn(2, ':');
                let typ = inn.next().unwrap();
                let z = inn.next().ok_or_else(|| LDFError(1, key.to_string()))?;

                let v = match typ {
                    "0" => Value::String(z.into()),
                    "1" => Value::I32(z.parse().map_err(|_| LDFError(2, key.to_string()))?),
                    "3" => Value::F32(z.parse().map_err(|_| LDFError(3, z.to_string()))?),
                    "5" => Value::U32(z.parse().map_err(|_| LDFError(4, key.to_string()))?),
                    "7" => Value::Bool(match z {
                        "0" => false,
                        "1" => true,
                        _ => return Err(LDFError(5, key.to_string())),
                    }),
                    "13" => Value::Bytes(z.into()),
                    _ => return Err(LDFError(6, key.to_string())),
                };
                x.insert(key.to_string(), v);
                Ok(x)
            })
            .map(|map| LDF { map })
    }
}

#[cfg(test)]
mod tests {
    use super::{Value, LDF};

    #[test]
    fn test_from_str() {
        let text = "CamRlBiasAmt=3:0\nCamRlBiasBi=7:0\nCamRlBiasFwd=7:0\nCamRlBiasRet=7:0\nCamRlCamPath=0:\nCamRlCamRetPath=0:\nCamRlFaceTgt=7:1\nCamRlPosPath=0:\nCheckPrecondition=0:\nNDAEG=13:\nadd_to_navmesh=7:1\ncamBehaviorDirectional=7:0\ncamBehaviorPitch=7:0\ncamBehaviorYaw=7:0\ncamDir=0:\ncamGradSnap=7:0\ncamLkDir=7:0\ncamPitchAngleDown=3:120\ncamPitchAngleUp=3:60\ncamPrefersToFadeObject=7:1\ncancelBehaviorMovement=7:0\ncarver_only=7:0\ncreate_physics=7:1\ncustom_config_names=0:\nfxpriority=1:0\nignoreCameraCollision=7:0\ninteraction_distance=3:16\nis_smashable=7:0\nloadOnClientOnly=7:0\nloadSrvrOnly=7:0\nnavmesh_carver=7:0\nrenderCullingGroup=5:0\nrespawnVol=7:0\nrespawnVolName=0:\nrlLeadIn=3:1\nrlLeadOut=3:-1\nrspPos=0:0.0000\u{1f}0.0000\u{1f}0.0000\nrspRot=0:1.0000 \u{1f} 0.0000 \u{1f} 0.0000 \u{1f} 0.0000\nsceneIDOverride=1:0\nsceneIDOverrideEnabled=7:1\nsceneLayerIDOverride=5:0\nsetsRailCam=7:0\ntemplate=1:-1";
        let map: LDF = text.parse().unwrap();

        let mut res = vec![
            ("CamRlBiasAmt", Value::F32(0.0)),
            ("CamRlBiasBi", Value::Bool(false)),
            ("CamRlBiasFwd", Value::Bool(false)),
            ("CamRlBiasRet", Value::Bool(false)),
            ("CamRlCamPath", Value::String(String::new())),
            ("CamRlCamRetPath", Value::String(String::new())),
            ("CamRlFaceTgt", Value::Bool(true)),
            ("CamRlPosPath", Value::String(String::new())),
            ("CheckPrecondition", Value::String(String::new())),
            ("NDAEG", Value::Bytes(String::new())),
            ("add_to_navmesh", Value::Bool(true)),
            ("camBehaviorDirectional", Value::Bool(false)),
            ("camBehaviorPitch", Value::Bool(false)),
            ("camBehaviorYaw", Value::Bool(false)),
            ("camDir", Value::String(String::new())),
            ("camGradSnap", Value::Bool(false)),
            ("camLkDir", Value::Bool(false)),
            ("camPitchAngleDown", Value::F32(120.0)),
            ("camPitchAngleUp", Value::F32(60.0)),
            ("camPrefersToFadeObject", Value::Bool(true)),
            ("cancelBehaviorMovement", Value::Bool(false)),
            ("carver_only", Value::Bool(false)),
            ("create_physics", Value::Bool(true)),
            ("custom_config_names", Value::String(String::new())),
            ("fxpriority", Value::I32(0)),
            ("ignoreCameraCollision", Value::Bool(false)),
            ("interaction_distance", Value::F32(16.0)),
            ("is_smashable", Value::Bool(false)),
            ("loadOnClientOnly", Value::Bool(false)),
            ("loadSrvrOnly", Value::Bool(false)),
            ("navmesh_carver", Value::Bool(false)),
            ("renderCullingGroup", Value::U32(0)),
            ("respawnVol", Value::Bool(false)),
            ("respawnVolName", Value::String(String::new())),
            ("rlLeadIn", Value::F32(1.0)),
            ("rlLeadOut", Value::F32(-1.0)),
            (
                "rspPos",
                Value::String("0.0000\u{1f}0.0000\u{1f}0.0000".to_string()),
            ),
            (
                "rspRot",
                Value::String("1.0000 \u{1f} 0.0000 \u{1f} 0.0000 \u{1f} 0.0000".to_string()),
            ),
            ("sceneIDOverride", Value::I32(0)),
            ("sceneIDOverrideEnabled", Value::Bool(true)),
            ("sceneLayerIDOverride", Value::U32(0)),
            ("setsRailCam", Value::Bool(false)),
            ("template", Value::I32(-1)),
        ];

        let mut r = res.drain(..);
        for (key, value) in &map.map {
            let (rk, rv) = r.next().unwrap();
            assert_eq!((rk, &rv), (key.as_str(), value));
        }

        assert_eq!(r.len(), 0);
    }
}