package com.example;

import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.JsonSerializer;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.example.MoneyUtils;
import org.joda.money.Money;
import java.io.IOException;

/**
 * Configuring this serializer will make Money objects render as a structure like this:
 * { amount: 2388, str: "23.88", pretty: "$23.88", symbol: "$", currency: "USD" }
 */
public class MoneySerializer extends JsonSerializer<Money> {

	@Override
	public void serialize(Money value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonProcessingException {
		jgen.writeStartObject();
		{
			jgen.writeNumberField("amount", value.getAmountMinorInt());
			jgen.writeStringField("str", value.getAmount().toString());
			jgen.writeStringField("symbol", value.getCurrencyUnit().getSymbol());
			jgen.writeStringField("currency", value.getCurrencyUnit().getCode());

			String pretty = prettyPrintWithCents(value);
			jgen.writeStringField("pretty", pretty);
		}
		jgen.writeEndObject();
	}

	/**
	 * Makes a nicely formatted version like $50.00 or $23.99.  Always shows cents.
	 */
	private String prettyPrintWithCents(Money money) {
		StringBuilder bld = new StringBuilder(money.getCurrencyUnit().getSymbol());
		bld.append(money.getAmount().toPlainString());
		return bld.toString();
	}
}