feat: split apart main.tsx

ui-tui/src/lib/messages.ts

@@ -0,0 +1,5 @@
+import type { Msg, Role } from '../types.js'
+
+export function upsert(prev: Msg[], role: Role, text: string): Msg[] {
+  return prev.at(-1)?.role === role ? [...prev.slice(0, -1), { role, text }] : [...prev, { role, text }]
+}

ui-tui/src/lib/text.ts

@@ -0,0 +1,34 @@
+import { INTERPOLATION_RE, LONG_MSG } from '../constants.js'
+
+export const compactPreview = (s: string, max: number) => {
+  const one = s.replace(/\s+/g, ' ').trim()
+
+  return !one ? '' : one.length > max ? one.slice(0, max - 1) + '…' : one
+}
+
+export const estimateRows = (text: string, w: number) =>
+  text.split('\n').reduce((s, l) => s + Math.max(1, Math.ceil(Math.max(1, l.length) / w)), 0)
+
+export const flat = (r: Record<string, string[]>) => Object.values(r).flat()
+
+export const fmtK = (n: number) => (n >= 1000 ? `${(n / 1000).toFixed(1)}k` : `${n}`)
+
+export const hasInterpolation = (s: string) => {
+  INTERPOLATION_RE.lastIndex = 0
+
+  return INTERPOLATION_RE.test(s)
+}
+
+export const pick = <T>(a: T[]) => a[Math.floor(Math.random() * a.length)]!
+
+export const userDisplay = (text: string): string => {
+  if (text.length <= LONG_MSG) {
+    return text
+  }
+
+  const first = text.split('\n')[0]?.trim() ?? ''
+  const words = first.split(/\s+/).filter(Boolean)
+  const prefix = (words.length > 1 ? words.slice(0, 4).join(' ') : first).slice(0, 80)
+
+  return `${prefix || '(message)'} [long message]`
+}