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use std::collections::HashMap;
use serde_json::Value;
use super::compwrapper::CompWrapper;
pub struct Template {
pub arguments: Vec<String>,
pub components: Vec<(String, HashMap<String, CompParam>)>
}
impl Template {
pub fn instantiate(&self, args: Vec<Value>, kwargs: HashMap<String, Value>) -> Option<Vec<CompWrapper>>{
let mut components: Vec<CompWrapper> = Vec::new();
for (compname, compparams) in &self.components {
let mut compargs: HashMap<&str, &Value> = HashMap::new();
for (name, param) in compparams {
match param {
CompParam::Constant(val) => {compargs.insert(name.as_str(), &val); Some(())},
CompParam::Argument(argname) => {
if let Some(argval) = kwargs.get(argname.as_str()) {
compargs.insert(name.as_str(), argval);
Some(())
} else if let Some(idx) = self.arguments.iter().position(|x| x == name){
if idx < args.len() {
compargs.insert(name.as_str(), &args[idx]);
Some(())
} else {
println!("positional argument out of range");
None
}
} else {
println!("can't find parameter value, compname: {}, name: {}, argname: {}", compname, name, argname);
None
}
}
}?;
}
components.push(CompWrapper::load_component(compname.as_str(), compargs)?);
}
Some(components)
}
}
pub enum CompParam {
Constant(Value),
Argument(String)
}
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