import std.algorithm;
import std.array;
import std.conv;
import std.datetime;

import dyaml;

string toHumanString(DateTime value) {
	return to!string(value.year) ~ "-" ~ to!string(ubyte(value.month)) ~ "-" ~ to!string(value.day);
}

T getOr(T)(Node node, string key, T or) {
	if (key in node) {
		try {
			return node[key].get!T;
		} catch (Exception e) {
			return or;
		}
	} else {
		return or;
	}
}

T[] getArray(T)(Node node, string key, T[] or = []) {
	try {
		return node.getOr!(Node[])(key, [])
			.map!(x => x.as!T).array;
	} catch (NodeException e) {
		return or;
	}
}