taiko-web score string decoder and encoder

scorestorage-convert.js

function scoreDecoder(scoreString){
	var difficulty = ["oni", "ura", "hard", "normal", "easy"]
	var scoreKeys = ["points", "good", "ok", "bad", "maxCombo", "drumroll"]
	var crownValue = ["", "silver", "gold"]
	var songAdded = false
	var output = {title: null}
	if(typeof scoreString === "string" && scoreString){
		var diffArray = scoreString.split(";")
		for(var i in difficulty){
			if(diffArray[i]){
				var crown = parseInt(diffArray[i].slice(0, 1)) || 0
				var score = {
					crown: crownValue[crown] || ""
				}
				var scoreArray = diffArray[i].slice(1).split(",")
				for(var j in scoreKeys){
					var name = scoreKeys[j]
					var value = parseInt(scoreArray[j], 36) || 0
					if(value < 0){
						value = 0
					}
					score[name] = value
				}
				output[difficulty[i]] = score
			}
		}
		return output
	}
}

function scoreEncoder(score){
	var difficulty = ["oni", "ura", "hard", "normal", "easy"]
	var scoreKeys = ["points", "good", "ok", "bad", "maxCombo", "drumroll"]
	var crownValue = ["", "silver", "gold"]
	var diffArray = []
	var notEmpty = false
	for(var i = difficulty.length; i--;){
		var diff = difficulty[i]
		if(score[diff]){
			var scoreArray = []
			var crown = crownValue.indexOf(score[diff].crown).toString()
			for(var j in scoreKeys){
				var name = scoreKeys[j]
				var value = score[diff][name]
				value = Math.floor(value).toString(36)
				scoreArray.push(value)
			}
			diffArray.unshift(crown + scoreArray.join(","))
			notEmpty = true
		}else if(notEmpty){
			diffArray.unshift("")
		}
	}
	return diffArray.join(";")
}

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