LINE 貼圖轉換圖片大小為512，適用於Telegram

Readme.md

用法

• 安裝 sharp (npm)

npm i sharp

• 下載 LINE 貼圖包 ({id}替代為貼圖ID)

http://dl.stickershop.line.naver.jp/products/0/0/1/{id}/iphone/[email protected]

• 執行 resize.js

node ./resize.js

Refrence

• Sea-n/LINE-stickers

resize.js

const fs = require('fs');
const sharp = require('sharp');

async function resizePng(name, q = 100) {
	return new Promise(function (resolve, reject) {
		if (q < 1) {
			let text = '發生錯誤，已中斷下載\n';
			text += '問題來源: resize webp\n';
			text += '編號: <code>' + name + '</code> \n';
			text += '詳細報告: 檔案過大\n';
			return reject(text);
		}

		const origin = './' + name + '@2x.png';
		const sticker = './sticker/' + name + '-' + q + '.png';

		let format = 'webp';
		let tmpFile = './temp/' + name + '-' + q + '.webp';
		let size = 512;
		if (q < 64) {
			console.log('resize png comp', name, q);
			format = 'jpg';
			tmpFile = './temp/' + name + '-' + q + '.jpg';
			size = 8 * q;
		}

		let errorF = false;

		sharp(origin)
			.toFormat(format, {
				quality: q,
			})
			.resize(size, size)
			// .max()
			.toFile(tmpFile)
			.catch((err) => {
				console.error('sharp err 1', name, origin, err);
				errorF = true;

				let text = '發生錯誤，已中斷下載\n';
				text += '問題來源: NodeJS <b>sharp</b> (圖片轉檔工具)\n';
				text += '編號: <code>' + name + '</code> \n';
				text += '詳細報告: resize webp\n';
				if (err.message != undefined) {text += '<pre>' + enHTML(err.message) + '</pre>';}
				else {text += '<pre>' + enHTML(err) + '</pre>';}
				return reject(text);
			})
			.then((result) => {
				if (errorF) {
					console.error('resizePng', 'error = true', 'stage 1', result);
					return;
				}

				sharp(tmpFile)
					.resize(512, 512)
					// .max()
					.png()
					.toFile(sticker)
					.then((result2) => {
						if (errorF) {
							console.error('resizePng', 'error = true', 'stage 2', result2);
							return;
						}

						const stat = fs.statSync(sticker);
						if (stat.size < 512 * 1000) {
							return resolve(sticker);
						}
						resizePng(name, Math.floor(q * 0.8))
							.catch((err) => {
								errorF = true;

								return reject(err + '.');
							})
							.then((sticker2) => {
								if (errorF) {
									console.error('resizePng', 'error = true', 'stage 3', result2);
									return;
								}

								return resolve(sticker2);
							});
					})
					.catch((err) => {
						console.error('sharp err 2', name, origin, tmpFile, err);
						errorF = true;

						let text = '發生錯誤，已中斷下載\n';
						text += '問題來源: NodeJS <b>sharp</b> (圖片轉檔工具)\n';
						text += '編號: <code>' + name + '</code> \n';
						text += '詳細報告: convert png\n';
						text += '<pre>' + enHTML(err.message) + '</pre>';
						return reject(text);
					});
			});
	});
}

async function main() {
	if (!fs.existsSync('sticker/')) {
		fs.mkdirSync('sticker/');
	}
	if (!fs.existsSync('temp/')) {
		fs.mkdirSync('temp/');
	}

	const meta = JSON.parse(fs.readFileSync('productInfo.meta', 'utf8'));
	for (let seq = 1; seq <= meta.stickers.length; seq++) {
		try {
			const sid = meta.stickers[seq - 1].id;
			await resizePng(sid);
			if (seq == meta.stickers.length) {
				console.log('完成!');
			}
		}
		catch (error) {
			console.log('err', error);
			return;
		}
	}
}
main();