Final Fantasy XIV Achievement Weights

const config = {
	method: 'GET',
	mode: 'cors'
}

fetch(
	"https://api.xivdb.com/achievement?columns=help_en,icon,id,name,points,requirement_1,requirement_2,type", 
	config
)
	.then(response => response.json())
	.then(achievements => {
		getWeights(achievements);
	})
	.catch(e => console.error(e));

function getWeights(achievements) {
	let result = {};

	achievements.forEach(a => {
		result[a.id] = {
			cumulative: getCumulative(a),
			description: a.help_en,
			icon: a.icon,
			name: a.name,
			points: a.points,
			weight: getWeight(a)
		}
	})

	console.info(result);
}

function getWeight(achievement) {
	switch (achievement.type) {
		case 4: // affix n materia to the same piece of gear
		case 10: // level your companion chocobo to rank n
		case 12: // participate in n matches in The Fold
		case 13: // triumph in n matches in The Fold
		case 17: // participate in n Frontline matches
		case 19: // triumph in n Frontline matches
			return achievement.requirement_1;
		case 1: // do n things
		case 3: // achieve n levels as class
		case 11: // achieve PVP rank n with a specific Grand Company
		case 15: // achieve rank n with a specific Beast Tribe
		case 18: // guide a specific Grand Company to n Frontline victories
		case 21: // obtain n minions
			return achievement.requirement_2;
		case 0: // complete specific Legacy thing (some stil relevant)
		case 5: // complete all n of these requirement_2 - 9 things
		case 6: // complete a specific quest
		case 7: // complete all specific hunting log entries
		case 8: // discover every location within...
		case 9: // complete any of these requirement_2 - 9 quests (?)
		case 14: // complete a specific Trial
		case 20: // attune to all aether currents in a specific area
		case 23: // complete all Verminion challenges
		case 24: // obtain a variety of anima weapon
			return 1;
		case 2: // complete n other achievements
			return 0; // the other achievements have their own weights and this is automatic
		case 16: // there is no type 16
		case 22: // there is no type 22
		default:
			return null;
	}
}

function getCumulative(achievement) {
	// The following are all cumulative.
	if (achievement.type == 3
		|| achievement.type == 4
		|| achievement.type == 10
		|| achievement.type == 12
		|| achievement.type == 13
		|| achievement.type == 17
		|| achievement.type == 19)
		return true;

	// The following are not cumulative.
	if (achievement.type == 2
		|| achievement.type == 5
		|| achievement.type == 6
		|| achievement.type == 7
		|| achievement.type == 8
		|| achievement.type == 9
		|| achievement.type == 14
		|| achievement.type == 20
		|| achievement.type == 23
		|| achievement.type == 24)
		return false;

	// The rest are cumulative if their requirement_1 property contains any of the following values.
	const requirement_1_cumulative_keys = [
		"0","1","2","3","4","5","6","7","8","11",
		"12","13","14","15","16","17","18","19","20","21",
		"22","138","139","140","141","142","143","144","145","146",
		"147","148","149","162","163","164","165","166","167","168",
		"169","170","179","180","181","182","183","184","185","186",
		"187","188","189","190","191","192","193","194","195","196",
		"197","198","199","200","201","202","203","204","205","206",
		"207","208","209","210","211","212","213","214","215","216",
		"217","218","219","238","239","240","244","251","266","267",
		"268","277","278","284","285","286","290","291","292","294",
		"348","352","353","354","355","356","357","358","362","363",
		"364","365","366","369","370","371","372","373","374","423",
		"433","444","460","461","462","463","464","465","466","467",
		"468","469","470","471","472","473","474","498","499","500",
		"501","511","512","532","539","540","544","545","546","548",
		"549","567"
	];

	return requirement_1_cumulative_keys.indexOf("" + achievement.requirement_1) !== -1
}