adana_script_core/primitive/
json.rs

1use std::collections::BTreeMap;
2
3use anyhow::anyhow;
4use serde_json::{Value, json};
5
6use super::Primitive;
7
8pub trait Json {
9    fn from_json(s: &str) -> anyhow::Result<Self>
10    where
11        Self: Sized;
12    fn to_json(&self) -> anyhow::Result<String>;
13}
14
15fn json_to_primitive(value: Value) -> anyhow::Result<Primitive> {
16    match value {
17        Value::Null => Ok(Primitive::Null),
18        Value::Bool(b) => Ok(Primitive::Bool(b)),
19        Value::Number(number) => number
20            .as_u64()
21            .map(|n| Primitive::Int(n as i128))
22            .or(number.as_i64().map(|n| Primitive::Int(n as i128)))
23            .or(number.as_f64().map(Primitive::Double))
24            .ok_or(anyhow!("could not parse json number")),
25        Value::String(s) => Ok(Primitive::String(s)),
26        Value::Array(json_array) => {
27            let mut prim_array = Vec::with_capacity(json_array.len());
28            for v in json_array {
29                prim_array.push(json_to_primitive(v)?);
30            }
31            Ok(Primitive::Array(prim_array))
32        }
33        Value::Object(o) => {
34            let mut struct_array = BTreeMap::new();
35            for (k, v) in o {
36                struct_array.insert(k, json_to_primitive(v)?);
37            }
38            Ok(Primitive::Struct(struct_array))
39        }
40    }
41}
42fn primitive_to_value(p: &Primitive) -> anyhow::Result<Value> {
43    match p {
44        Primitive::Ref(r) => {
45            let r =
46                r.read().map_err(|e| anyhow!("could not acquire lock! {e}"))?;
47            primitive_to_value(&r)
48        }
49        Primitive::U8(u) => Ok(json!(u)),
50        Primitive::I8(u) => Ok(json!(u)),
51        Primitive::Int(u) => Ok(json!(u)),
52        Primitive::Double(u) => Ok(json!(u)),
53        Primitive::Bool(b) => Ok(json!(b)),
54        Primitive::Null => Ok(Value::Null),
55        Primitive::String(s) => Ok(Value::String(s.to_owned())),
56        Primitive::Array(prim_arr) => {
57            let mut json_arr = Vec::with_capacity(prim_arr.len());
58            for p in prim_arr {
59                json_arr.push(primitive_to_value(p)?);
60            }
61            Ok(Value::Array(json_arr))
62        }
63        Primitive::Struct(s) => {
64            let mut o = serde_json::Map::with_capacity(s.len());
65            for (k, v) in s {
66                o.insert(k.to_string(), primitive_to_value(v)?);
67            }
68            Ok(Value::Object(o))
69        }
70        v => Ok(json!(v.to_string())),
71    }
72}
73
74impl Json for Primitive {
75    fn from_json(s: &str) -> anyhow::Result<Self> {
76        let value = serde_json::from_str(s)?;
77        json_to_primitive(value)
78    }
79
80    fn to_json(&self) -> anyhow::Result<String> {
81        let value = primitive_to_value(self)?;
82        serde_json::to_string_pretty(&value).map_err(|e| anyhow!("{e}"))
83    }
84}
adana_script_core/primitive/json.rs

adana_script_core/primitive/
json.rs
