vertigo 0.11.3

Reactive Real-DOM library with SSR for Rust
Documentation 
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use std::collections::BTreeMap;

use crate::{JsJson, JsJsonContext, JsJsonDeserialize, JsJsonSerialize, from_json};

pub struct MapItem<K: JsJsonSerialize + JsJsonDeserialize, V: JsJsonSerialize + JsJsonDeserialize> {
    pub key: K,
    pub value: V,
}

impl<K: JsJsonSerialize + JsJsonDeserialize, V: JsJsonSerialize + JsJsonDeserialize> JsJsonSerialize
    for MapItem<K, V>
{
    fn to_json(self) -> JsJson {
        let mut object = BTreeMap::<String, JsJson>::new();
        object.insert("k".into(), self.key.to_json());
        object.insert("v".into(), self.value.to_json());
        JsJson::Object(object)
    }
}

impl<K: JsJsonSerialize + JsJsonDeserialize, V: JsJsonSerialize + JsJsonDeserialize>
    JsJsonDeserialize for MapItem<K, V>
{
    fn from_json(context: JsJsonContext, json: JsJson) -> Result<Self, JsJsonContext> {
        let mut map = json.get_hashmap(&context)?;

        let k = map.remove("k");
        let v = map.remove("v");

        if !map.is_empty() {
            return Err(context.add("Only the keys (k and v) were expected."));
        }

        if let (Some(k), Some(v)) = (k, v) {
            let k = from_json::<K>(k)
                .map_err(|error| context.add(format!("key error => {}", error)))?;

            let v = from_json::<V>(v)
                .map_err(|error| context.add(format!("value error => {}", error)))?;

            return Ok(MapItem { key: k, value: v });
        }

        Err(context.add("Expected at this level of key k and v"))
    }
}