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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, Copy, Hash, PartialEq, Eq)]
pub enum SaveOption {
Default,
False,
Always
}
#[derive(Debug, Clone, PartialEq)]
pub struct Template {
pub name: EntityType,
pub args: Vec<Parameter>,
pub kwargs: HashMap<String, Parameter>,
pub save: SaveOption,
}
impl Template {
pub fn new(name: &str, kwargs: HashMap<String, Parameter>) -> Self {
Self {
name: EntityType(name.to_string()),
args: Vec::new(),
kwargs,
save: SaveOption::Default
}
}
pub fn empty(name: &str) -> Self {
Self::new(name, HashMap::new())
}
pub fn should_save(&self) -> bool {
match self.save {
SaveOption::Default | SaveOption::Always => true,
SaveOption::False => false
}
}
pub fn from_entity_type(typ: EntityType) -> Self {
Self {
name: typ,
args: Vec::new(),
kwargs: HashMap::new(),
save: SaveOption::Default
}
}
pub fn unsaved(mut self) -> Self {
if self.save == SaveOption::Default {
self.save = SaveOption::False
}
self
}
pub fn merge(mut self, other: Template) -> Self {
if self.save == SaveOption::Default {
self.save = other.save;
}
for (key, value) in other.kwargs {
self.kwargs.entry(key).or_insert(value);
}
self
}
pub fn from_json(v: &Value) -> PResult<Template> {
let val = match v {
Value::String(s) => json!({"type": s}),
Value::Array(_) => json!({
"type": v.get(0).ok_or(perr!("index 0 not in template array {:?}", v))?,
"kwargs": v.get(1).ok_or(perr!("index 1 not in template array {:?}", v))?
}),
Value::Object(_) => v.clone(),
_ => return Err(perr!("invalid template {:?}", v))
};
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)?);
}
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)?);
}
let save =
if let Some(saveval) = val.get("save") {
if saveval.as_bool().ok_or(perr!("save not a bool"))? {
SaveOption::Always
} else {
SaveOption::False
}
} else {
SaveOption::Default
};
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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