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import { PropSchema, serialize, deserialize, custom } from "serializr";
import { Field } from "../../fields/NewDoc";
export class SerializationHelper {
public static Serialize(obj: Field): any {
if (!obj) {
return null;
}
if (typeof obj !== 'object') {
return obj;
}
if (!(obj.constructor.name in reverseMap)) {
throw Error(`type '${obj.constructor.name}' not registered. Make sure you register it using a @Deserializable decorator`);
}
const json = serialize(obj);
json.__type = reverseMap[obj.constructor.name];
return json;
}
public static Deserialize(obj: any): any {
if (!obj) {
return null;
}
if (typeof obj !== 'object') {
return obj;
}
if (!obj.__type) {
throw Error("No property 'type' found in JSON.");
}
if (!(obj.__type in serializationTypes)) {
throw Error(`type '${obj.__type}' not registered. Make sure you register it using a @Deserializable decorator`);
}
return deserialize(serializationTypes[obj.__type], obj);
}
}
let serializationTypes: { [name: string]: any } = {};
let reverseMap: { [ctor: string]: string } = {};
export function Deserializable(name: string): Function;
export function Deserializable(constructor: Function): void;
export function Deserializable(constructor: Function | string): Function | void {
function addToMap(name: string, ctor: Function) {
if (!(name in serializationTypes)) {
serializationTypes[name] = constructor;
reverseMap[ctor.name] = name;
} else {
throw new Error(`Name ${name} has already been registered as deserializable`);
}
}
if (typeof constructor === "string") {
return (ctor: Function) => {
addToMap(constructor, ctor);
};
}
addToMap(constructor.name, constructor);
}
export function autoObject(): PropSchema {
return custom(
(s) => SerializationHelper.Serialize(s),
(s) => SerializationHelper.Deserialize(s)
);
}
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