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use serde_json::Value;
#[derive(Debug, PartialEq, Clone)]
pub enum Parameter {
String(String),
Int(i64),
// Pos(Pos),
Float(f64)
}
impl Parameter {
#[allow(dead_code)]
pub fn string(string: &str) -> Self {
Self::String(string.to_string())
}
pub fn from_typed_json(typ: ParameterType, val: &Value) -> Option<Parameter>{
match typ {
ParameterType::String => Some(Self::String(val.as_str()?.to_string())),
ParameterType::Int => Some(Self::Int(val.as_i64()?)),
ParameterType::Float => Some(Self::Float(val.as_f64()?))
}
}
pub fn paramtype(&self) -> ParameterType {
match self {
Self::String(_) => ParameterType::String,
Self::Int(_) => ParameterType::Int,
Self::Float(_) => ParameterType::Float
}
}
pub fn guess_from_json(val: &Value) -> Option<Parameter> {
let typ =
if val.is_string() {
ParameterType::String
} else if val.is_u64() || val.is_i64() {
ParameterType::Int
} else if val.is_f64() {
ParameterType::Float
} else {
println!("{:?}", val);
return None
};
Self::from_typed_json(typ, val)
}
}
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ParameterType {
String,
Int,
Float
}
impl ParameterType {
pub fn from_str(typename: &str) -> Option<Self>{
match typename {
"string" => Some(Self::String),
"int" => Some(Self::Int),
"float" => Some(Self::Float),
_ => None
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use serde_json::json;
macro_rules! gfj { // guess from json
($j:expr) => {Parameter::guess_from_json(&json!($j)).unwrap()}
}
#[test]
fn can_guess_json() {
Parameter::guess_from_json(&json!(3)).unwrap();
}
#[test]
fn guess_json() {
assert_eq!(gfj!("charles"), Parameter::string("charles"));
assert_eq!(gfj!("1"), Parameter::string("1"));
assert_eq!(gfj!(""), Parameter::string(""));
assert_eq!(gfj!(3), Parameter::Int(3));
assert_eq!(gfj!(-3), Parameter::Int(-3));
assert_eq!(gfj!(0), Parameter::Int(0));
assert_eq!(gfj!(-0), Parameter::Int(0));
assert_eq!(gfj!(3.5), Parameter::Float(3.5));
assert_eq!(gfj!(3.0), Parameter::Float(3.0));
assert_eq!(gfj!(-3.0), Parameter::Float(-3.0));
assert_eq!(gfj!(0.0), Parameter::Float(0.0));
assert_eq!(gfj!(-0.0), Parameter::Float(0.0));
}
#[test]
fn guess_json_none() {
assert!(Parameter::guess_from_json(&json!([2, 5])).is_none());
assert!(Parameter::guess_from_json(&json!(true)).is_none());
assert!(Parameter::guess_from_json(&json!({"hello": "world"})).is_none());
}
}
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