convert gcode

gistfile1.txt

let prevGCmd = null;
  const previewCode = gcode
			.split('\n')
			.map((i) => {
				const line = i.trim();
				let result = line;
        if (line.startsWith('G20')) { // keep as is
          return result;
        }
        
				if (line.charAt(0) == 'G') {
          const gCmd = new RegExp(/G\d+/g);

          const matches = line.match(gCmd);
          console.log(matches);
          prevGCmd = matches[matches.length-1];
					// result = `G${line.slice(2)}`;
					if (!line?.includes('Z')) {
						result += ' E10';
					}
				}
				// else if (!line.includes('start') && ['X', 'Y'].includes(line.charAt(0))) {
				// 	result = `G2 ${line} E10`; // this fails for G0/ G1 cmds: line 34/35
				// }

        else if (['X', 'Y'].includes(line.charAt(0))) {
          result = `${prevGCmd} ${line} E10`;
        }

				return result;
			})
			.join('\n');