convert-bilibili-subtitle.js

var fs = require('fs')

function convertSub(jsonobj) {
	//let result = fs.readFileSync("head.ass");
	let result = "[Script Info]\n";
	result += "; Script generated by Aegisub 3.2.2\n";
	result += "; http://www.aegisub.org/\n";
	result += "Title: Default Aegisub file\n";
	result += "ScriptType: v4.00+\n";
	result += "WrapStyle: 0\n";
	result += "ScaledBorderAndShadow: yes\n";
	result += "YCbCr Matrix: None\n";
	result += "\n";
	result += "[V4+ Styles]\n";
	result += "Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding\n";
	result += "Style: 1080p,Arial,75,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,2,2,2,10,10,10,1\n";
	result += "Style: Default,Arial,20,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,2,2,2,10,10,10,1\n";
	result += "\n";
	result += "[Events]\n";

	function fillZero(num) {
		if (num > 10) return "" + num;
		else if (num > 0) return "0" + num;
		else if (num == 0) return "00";
		else throw new Error();
	}

	function secToTime(sec)  {
		let secstr = "" + sec;
		let secsplitted = secstr.split(".");
		let secint = secsplitted[0];
		let secrem = secint % 60
		secint -= secrem;
		let min = secint / 60;
		secint -= min * 60;
		let decimals = secsplitted[1];
		if (decimals == undefined) decimals = "00";
		else {
			decimals = (decimals + "00").substring(0, 2);
		}
		return "0:" + fillZero(min) + ":" + fillZero(secrem) + "." + decimals;
	}

	jsonobj.body.forEach((ev) => {
		let line = "Dialogue: 0," + secToTime(ev.from) + "," + secToTime(ev.to) + ",*Default,NTP,0,0,0,," + ev.content.replaceAll("\n", "\\n");
		result += line + "\n";
	});
	
	return result;
}

for (let i = 9; i<= 12; i++) {
	let jsontext = fs.readFileSync("" + i + ".json");
	let jsonobj = JSON.parse(jsontext);
	let episodeNum = i < 10 ? "0" + i : i;
	let fileName = "BANGUMI_NAME " + episodeNum + " .ass"
	fs.writeFileSync(fileName, convertSub(jsonobj));
}