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
|
use std::collections::HashMap;
use std::fmt::Formatter;
use std::marker::PhantomData;
use serde::{Deserialize, Deserializer};
use serde::de::{MapAccess, Visitor};
use sha1_smol::Digest;
#[derive(Debug, Deserialize)]
pub struct Asset {
#[serde(skip)]
pub name: String,
pub hash: Digest,
pub size: usize
}
#[derive(Debug, Deserialize)]
pub struct AssetIndex {
#[serde(rename = "virtual", default)]
pub virtual_assets: bool,
#[serde(default)]
pub map_to_resources: bool,
#[serde(deserialize_with = "deserialize_assets")]
pub objects: HashMap<String, Asset>
}
trait SetName {
fn set_name(&mut self, name: String);
}
impl SetName for Asset {
fn set_name(&mut self, name: String) {
self.name = name;
}
}
fn deserialize_assets<'de, D, T>(deserializer: D) -> Result<HashMap<String, T>, D::Error>
where
D: Deserializer<'de>,
T: SetName + Deserialize<'de>
{
struct AssetVisitor<T>(PhantomData<T>);
impl<'de, T> Visitor<'de> for AssetVisitor<T>
where
T: SetName + Deserialize<'de>
{
type Value = HashMap<String, T>;
fn expecting(&self, formatter: &mut Formatter) -> std::fmt::Result {
formatter.write_str("asset objects map")
}
fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
where
A: MapAccess<'de>,
{
let mut out = HashMap::new();
while let Some((key, mut asset)) = map.next_entry::<String, T>()? {
asset.set_name(key.clone());
out.insert(key, asset);
}
Ok(out)
}
}
deserializer.deserialize_any(AssetVisitor(PhantomData))
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_it() {
dbg!(serde_json::from_str::<AssetIndex>(r#"{
"virtual": true,
"objects": {
"object1": { "hash": "0d000710b71ca9aafabd8f587768431d0b560b32", "size": 100 },
"object2/abc": { "hash": "0e000710b71ca9aafabd8f587768431d0b560b32", "size": 10000 }
}
}"#).unwrap());
}
}
|
