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[bidi-split] Live 2-way copy test — / rotates /bi vs /di #20

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Merged
Smetools merged 1 commit into from
May 30, 2026
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[bidi-split] Live 2-way copy test — / rotates /bi vs /di #20

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40 changes: 17 additions & 23 deletions app/middleware.ts
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Original file line number Diff line number Diff line change
@@ -1,41 +1,35 @@
import { NextRequest, NextResponse } from 'next/server'

const VARIANTS = ['a', 'b', 'c', 'd', 'e'] as const
const THEMES = ['baseline', 'operator-dark', 'operator-light', 'library'] as const
// Live A/B copy test: two finalists, both in the impeccable design, so COPY is
// the only variable.
// bi → /bi (Version B copy: outcome-first + the 80-second Odoo demo)
// di → /di (Version D copy: show-the-magic + L1/L2/L3 escalation)
// The cream A/C and the old cream B/D + the /e variant are retired from the
// random rotation (still reachable by direct URL). The /bi and /di pages have a
// fixed design and ignore the theme switcher, so no theme rotation here.
const VARIANTS = ['bi', 'di'] as const
const VARIANT_COOKIE = 'kc-landing-variant'
const THEME_COOKIE = 'kc-landing-theme'

export function middleware(request: NextRequest) {
const { pathname } = request.nextUrl

if (pathname !== '/') return NextResponse.next()

const existingVariant = request.cookies.get(VARIANT_COOKIE)?.value
const existingTheme = request.cookies.get(THEME_COOKIE)?.value

const variant = VARIANTS.includes(existingVariant as any)
? existingVariant!
const existing = request.cookies.get(VARIANT_COOKIE)?.value
const variant = VARIANTS.includes(existing as any)
? existing!
: VARIANTS[Math.floor(Math.random() * VARIANTS.length)]

const theme = THEMES.includes(existingTheme as any)
? existingTheme!
: THEMES[Math.floor(Math.random() * THEMES.length)]

const maxAge = 60 * 60 * 24 * 30

if (variant === 'a') {
const response = NextResponse.next()
if (!existingVariant) response.cookies.set(VARIANT_COOKIE, variant, { maxAge, path: '/' })
if (!existingTheme) response.cookies.set(THEME_COOKIE, theme, { maxAge, path: '/' })
return response
}

const url = request.nextUrl.clone()
url.pathname = `/${variant}`
const response = NextResponse.rewrite(url)

if (!existingVariant) response.cookies.set(VARIANT_COOKIE, variant, { maxAge, path: '/' })
if (!existingTheme) response.cookies.set(THEME_COOKIE, theme, { maxAge, path: '/' })
if (!VARIANTS.includes(existing as any)) {
response.cookies.set(VARIANT_COOKIE, variant, {
maxAge: 60 * 60 * 24 * 30,
path: '/',
})
}

return response
}
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