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use indexmap::IndexMap;
use serde::Deserialize;
use ::Resource;
#[derive(Debug, Default, Serialize, Deserialize)]
pub struct Resources(IndexMap<String, ResourceInner>);
impl Resources {
pub fn get<R: Resource>(&self, id: &str) -> Result<R, ::Error> {
self.0.get(id)
.ok_or_else(|| ::Error::new(::ErrorKind::NotFound,
format_args!("resource with logical id {} not found", id)))
.and_then(|inner| {
if inner.tag == R::TYPE {
R::Properties::deserialize(&inner.properties)
.map_err(|err| ::Error::new(::ErrorKind::Serialization, err))
.map(|properties| properties.into())
} else {
Err(::Error::new(::ErrorKind::Serialization,
format_args!("resource has type {}, expected {}", inner.tag, R::TYPE)))
}
})
}
pub fn has(&self, id: &str) -> bool {
self.0.contains_key(id)
}
pub fn set<R: Resource>(&mut self, id: &str, resource: R) {
let inner = ResourceInner {
tag: R::TYPE.to_owned(),
properties: ::serde_json::to_value(resource.properties()).unwrap()
};
self.0.insert(id.to_owned(), inner);
}
}
fn empty_object() -> ::serde_json::Value {
::serde_json::Value::Object(Default::default())
}
#[derive(Debug, Serialize, Deserialize)]
struct ResourceInner {
#[serde(rename = "Type")]
tag: String,
#[serde(rename = "Properties", default = "empty_object")]
properties: ::serde_json::Value
}