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use wasm_bindgen::prelude::*;use js_sys::*;use yaml_rust::*;use super::utils::*;
#[wasm_bindgen(inline_js = r"    export const is_map = obj => obj instanceof Map")]extern "C" {    fn is_map(obj: &JsValue) -> bool;}
/// Encode a JavaScript value into a YAML text.////// Throws on failure.////// **NOTE:** Circular object will result in infinite loop.#[wasm_bindgen]pub fn stringify(value: JsValue) -> Result<String, JsValue> {    set_panic_hook();    let mut text = String::new();    let mut emitter = YamlEmitter::new(&mut text);    if let Some(doc) = js2yaml(value) {        emitter            .dump(&doc)            .map_err(|error| Error::new(&format!("{}", error)))?;    } else {        return Err(JsValue::from(TypeError::new("Bad value")));    }    Ok(text)}
fn js2yaml(js: JsValue) -> Option<Yaml> {    if js.is_function() || js.is_symbol() || js.is_undefined() {        return None;    }
    if js.is_null() {        return Some(Yaml::Null);    }
    if js.is_string() {        return Some(Yaml::String(js.as_string().unwrap()));    }
    if Number::is_integer(&js) {        return Some(Yaml::Integer(js.as_f64().unwrap() as i64));    }
    if Number::is_finite(&js) {        return Some(Yaml::Real(js.as_f64().unwrap().to_string()));    }
    if js.is_object() {        return Some(if Array::is_array(&js) {            let vec = Array::from(&js)                .iter()                .filter_map(|x| js2yaml(x))                .collect::<Vec<Yaml>>();            Yaml::Array(vec)        } else {            use linked_hash_map::LinkedHashMap;            let mut hash = LinkedHashMap::new();            let entries: Array = if is_map(&js) {                Array::from(&js)            } else {                Array::from(&Object::entries(&Object::from(js)))            };            for entry in entries.iter() {                let js_pair = Array::from(&entry);                let js_key = js_pair.get(0);                let js_value = js_pair.get(1);                if let (Some(yaml_key), Some(yaml_value)) = (js2yaml(js_key), js2yaml(js_value)) {                    hash.insert(yaml_key, yaml_value);                }            }            Yaml::Hash(hash)        })    }
    if js.is_falsy() {        return Some(Yaml::Boolean(false));    }
    if js.is_truthy() {        return Some(Yaml::Boolean(true));    }
    unreachable!();}