bare-operating-system/packages/bare-os-coreutils/lib/baresay-engine.js

/**
 * Bubble + cow rendering for baresay (no imports; prepended before src/baresay.js).
 */

/** @param {string} text @param {number} width @param {boolean} noWrap */
function bareBaresayWrap(text, width, noWrap) {
  const t = String(text || '').replace(/\r\n/g, '\n')
  if (noWrap) {
    const line = t.replace(/\n/g, ' ')
    return line.length ? [line] : ['']
  }
  const out = []
  const lim = Math.max(8, Math.min(200, width | 0)) || 40
  for (const para of t.split('\n')) {
    if (!para.trim()) {
      out.push('')
      continue
    }
    let rest = para.trim()
    while (rest.length) {
      if (rest.length <= lim) {
        out.push(rest)
        break
      }
      let cut = rest.lastIndexOf(' ', lim)
      if (cut <= 0) cut = lim
      const piece = rest.slice(0, cut).trimEnd()
      if (!piece.length) {
        out.push(rest.slice(0, lim))
        rest = rest.slice(lim).trimStart()
      } else {
        out.push(piece)
        rest = rest.slice(cut).trimStart()
      }
    }
  }
  return out.length ? out : ['']
}

/**
 * @param {string[]} lines
 * @param {{ think?: boolean, rainbow?: boolean }} opts
 */
function bareBaresayBalloon(lines, opts) {
  const think = !!(opts && opts.think)
  const rainbow = !!(opts && opts.rainbow)
  const rows = lines.map((l) => String(l))
  const n = rows.length
  const longest = Math.max(...rows.map((r) => r.length), 2)
  const padded = rows.map((r) => r.padEnd(longest))

  /** @type {string[]} */
  const mid = []
  if (n === 1) {
    const inner = think
      ? '( ' + padded[0] + ' )'
      : '< ' + padded[0] + ' >'
    mid.push(inner)
  } else if (think) {
    for (let i = 0; i < n; i++) {
      mid.push('( ' + padded[i] + ' )')
    }
  } else {
    for (let i = 0; i < n; i++) {
      let L = '|'
      let R = '|'
      if (i === 0) {
        L = '/'
        R = '\\'
      } else if (i === n - 1) {
        L = '\\'
        R = '/'
      }
      mid.push(L + ' ' + padded[i] + ' ' + R)
    }
  }

  const topUnders = Math.max(0, mid[0].length - 2)
  const botDash = Math.max(0, mid[mid.length - 1].length - 2)
  /** @type {string[]} */
  const out = []
  out.push(' ' + '_'.repeat(topUnders))
  if (rainbow) {
    const ansi = bareBaresayRainbowCodes()
    let k = 0
    for (const line of mid) {
      const c = ansi[k % ansi.length]
      k++
      out.push(c + line + '\x1b[0m')
    }
  } else {
    for (const line of mid) out.push(line)
  }
  out.push(' ' + '-'.repeat(botDash))
  return out
}

function bareBaresayRainbowCodes() {
  return [
    '\x1b[31m',
    '\x1b[91m',
    '\x1b[33m',
    '\x1b[32m',
    '\x1b[36m',
    '\x1b[34m',
    '\x1b[35m'
  ]
}

/** Extract figure body from .bare template text (Perl heredoc or raw). */
function bareBaresayExtractCow(raw) {
  const s = String(raw || '').replace(/^\ufeff/, '')
  // cowsay uses: $the_cow = <<"EOC";  ← semicolon before newline
  const m = s.match(
    /\$the_cow\s*=\s*<<"EOC"\s*;?\s*\r?\n([\s\S]*?)\r?\n\s*EOC\s*(?:\r?\n|$)/m
  )
  if (m)
    return m[1].replace(/\r\n/g, '\n').replace(/\n+$/, '') + '\n'
  return s.replace(/\r\n/g, '\n').trimEnd() + '\n'
}

/**
 * @param {string} template
 * @param {string} eyes two chars
 * @param {string} tongue one char
 * @param {string} thoughts
 */
function bareBaresayFillCow(template, eyes, tongue, thoughts) {
  const e = (eyes || 'oo').slice(0, 2).padEnd(2, 'o')
  const L = e.charAt(0) || 'o'
  const R = e.charAt(1) || 'o'
  const tg = (tongue || ' ').slice(0, 1)
  const th = thoughts || '\\'
  return template
    .replace(/\$thoughts/g, th)
    .replace(/\$eyes/g, e)
    .replace(/\$L/g, L)
    .replace(/\$R/g, R)
    .replace(/\$tongue/g, tg)
}

/** @param {string} flag */
function bareBaresayPreset(flag) {
  switch (flag) {
    case 'b':
      return { eyes: '==', tongue: ' ' }
    case 'd':
      return { eyes: 'XX', tongue: 'U' }
    case 'g':
      return { eyes: '$$', tongue: ' ' }
    case 'p':
      return { eyes: '@@', tongue: ' ' }
    case 's':
      return { eyes: '**', tongue: ' ' }
    case 't':
      return { eyes: '--', tongue: ' ' }
    case 'w':
      return { eyes: '@@', tongue: ' ' }
    case 'y':
      return { eyes: '..', tongue: ' ' }
    default:
      return { eyes: 'oo', tongue: ' ' }
  }
}

/**
 * @param {string} message
 * @param {string} cowBody filled lines (no vars)
 * @param {{ width: number, noWrap: boolean, think?: boolean, rainbow?: boolean }} opts
 */
function bareBaresayCompose(message, cowBody, opts) {
  const width = opts.width | 0
  const wrapped = bareBaresayWrap(message, width, opts.noWrap)
  const balloon = bareBaresayBalloon(wrapped, {
    think: opts.think,
    rainbow: opts.rainbow
  })
  const cowLines = cowBody.replace(/\s+$/, '').split('\n')
  return balloon.concat(cowLines).join('\n') + '\n'
}

/** Minimal bear if no cowfile on disk (ASCII). */
function bareBaresayFallbackBearTemplate() {
  return [
    ' $thoughts',
    '  $thoughts      __         __',
    '   $thoughts    /  \\.-"""-./  \\',
    '    $thoughts   \\    -   -    /',
    '     $thoughts   |   $L   $R   |',
    '      $thoughts  \\  .-\'\'\'-.  /',
    "       $thoughts   '-\\__Y__/-'",
    '        $thoughts     \u0060---\u0060'
  ].join('\n')
}