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use std::collections::HashMap;
use serde_json::{json, Value};
use crate::{
parameter::Parameter,
PResult,
perr
};
#[derive(Debug, PartialEq, Eq, Clone, Hash)]
pub struct EntityType(pub String);
#[derive(Debug, Clone, PartialEq)]
pub struct Template {
pub name: EntityType,
pub args: Vec<Parameter>,
pub kwargs: HashMap<String, Parameter>,
pub save: bool
}
impl Template {
pub fn new(name: &str, kwargs: HashMap<String, Parameter>) -> Self {
Self {
name: EntityType(name.to_string()),
args: Vec::new(),
kwargs,
save: true
}
}
pub fn empty(name: &str) -> Self {
Self::new(name, HashMap::new())
}
pub fn from_entity_type(typ: EntityType) -> Self {
Self {
name: typ,
args: Vec::new(),
kwargs: HashMap::new(),
save: true
}
}
pub fn unsaved(mut self) -> Self {
self.save = false;
self
}
pub fn from_json(val: &Value) -> PResult<Template> {
if val.is_string(){
return Ok(Self::empty(val.as_str().unwrap()));
}
let name = EntityType(val.get("type").ok_or(perr!("template doesn't have 'type'"))?.as_str().ok_or(perr!("template type not a string"))?.to_string());
let mut args = Vec::new();
for arg in val.get("args").unwrap_or(&json!([])).as_array().ok_or(perr!("template args not an array"))? {
args.push(Parameter::guess_from_json(arg).ok_or(perr!("template arg not a parameter"))?);
}
let mut kwargs = HashMap::new();
for (key, arg) in val.get("kwargs").unwrap_or(&json!({})).as_object().ok_or(perr!("template kwargs not a json object"))? {
kwargs.insert(key.to_string(), Parameter::guess_from_json(arg).ok_or(perr!("template arg not a parameter"))?);
}
let save = val.get("save").unwrap_or(&json!(true)).as_bool().ok_or(perr!("save not a bool"))?;
Ok(Template {name, args, kwargs, save})
}
pub fn to_json(&self) -> Value {
if self.args.is_empty() && self.kwargs.is_empty() {
return json!(self.name.0);
}
let jsonargs: Vec<Value> = self.args.iter().map(|a| a.to_json()).collect();
let jsonkwargs: HashMap<&String, Value> = self.kwargs.iter().map(|(k, a)| (k, a.to_json())).collect();
json!({
"type": self.name.0,
"args": jsonargs,
"kwargs": jsonkwargs
})
}
}
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