line trimmer

poems.js

const stopRe = /\band\b|\bor\b|\bbut\b|\bnor\b|\bfor\b|\byet\b|\bso\b|\bin\b|\bon\b|\bto\b|\bof\b|\binto\b|\bwith\b|[\.\!\?]+|[,;:]/igm;

export default { }

// function puncStrip(text) {
//   return text; // no processing
//   // return text.match(puncStripRe)[1]; // kyle's processing
// }

function shortenLine(line, maxLineLength=64) {
	// reduce and normalize whitespace
	let lineWs = line.replace(/\s+/igm, ' ').trim();

	// if last char not punctuation or whitespace
	// assume last token is an incomplete word and drop it
	let isNotLastCharPunc = !lineWs.match(/\W$/m);
	let lineTrim = lineWs;
	if (isNotLastCharPunc) lineTrim = lineWs.replace(/\s[^\s]*$/m, '');

	// reduce line if greater than maxLineLength
	let curLineLength = lineTrim.length;
	if (curLineLength <= maxLineLength) return [lineTrim, isNotLastCharPunc];

	let match, stopIxs = [];
	while ((match = stopRe.exec(lineTrim)) != null) stopIxs.push(match.index);

	// console.log(stopIxs);

	let stopIxsCeil = stopIxs.filter(n=>n<=maxLineLength);
	// console.log(stopIxsCeil);
	let stopIx = -1;
	if (stopIxsCeil.length > 0) stopIx = Math.max(...stopIxsCeil);
	else {
		let consolation = lineTrim.slice(0, maxLineLength-3).replace(/\s[^\s]*$/m, '');
		return [consolation+'...', false];
	}
	// console.log(stopIx);

	let outLine = lineTrim.slice(0,stopIx).trim();

	return [outLine, !outLine.match(/\W$/m)];

}

export function capitalize(text) {
  return text.charAt(0).toUpperCase() + text.substr(1)
}

export function cleanPoem(line1, line2) {
  let line1tup = shortenLine(line1), line2tup = shortenLine(line2);
  let line1short = line1tup[0], line1punc = line1tup[1];
  let line2short = line2tup[0], line2punc = line2tup[1];
  return [
    capitalize(line1short) + (line1punc?',':''),
    line2short + (line2punc?'.':'')
  ]
}