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feat(app): make session timelines much faster AND without flicker or scroll jumps (#32331)

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Luke Parker 2026-06-16 18:53:57 +02:00 • committed by GitHub
commit 3b811bd019
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49 changed files with 2824 additions and 845 deletions
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14
packages/app/e2e/utils/mock-server.ts
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@ -18,7 +18,10 @@ export interface MockServerConfig {
project: unknown
sessions: ({ id: string } & Record<string, unknown>)[]
pageMessages: (sessionId: string, limit: number, before?: string) => { items: unknown[]; cursor?: string }
messageDelay?: number
onMessages?: (input: { sessionID: string; before?: string; phase: "start" | "end" }) => void
events?: () => unknown[]
eventRetry?: number
}
export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
@ -44,7 +47,7 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
if (url.port !== targetPort) return route.fallback()
const path = url.pathname
if (path === "/global/event" || path === "/event") return sse(route, config.events?.())
if (path === "/global/event" || path === "/event") return sse(route, config.events?.(), config.eventRetry)
if (path === "/global/health") return json(route, { healthy: true })
if (emptyObject.has(path)) return json(route, {})
if (emptyList.has(path)) return json(route, [])
@ -60,9 +63,12 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
const messagesMatch = path.match(/^\/session\/([^/]+)\/message$/)
if (messagesMatch) {
const limit = Number(url.searchParams.get("limit") ?? 80)
const before = url.searchParams.get("before") ?? undefined
config.onMessages?.({ sessionID: messagesMatch[1], before, phase: "start" })
if (config.messageDelay) await new Promise((resolve) => setTimeout(resolve, config.messageDelay))
const limit = Number(url.searchParams.get("limit") ?? 80)
const pageData = config.pageMessages(messagesMatch[1], limit, before)
config.onMessages?.({ sessionID: messagesMatch[1], before, phase: "end" })
return json(route, pageData.items, pageData.cursor ? { "x-next-cursor": pageData.cursor } : undefined)
}
@ -83,10 +89,10 @@ function json(route: Route, body: unknown, headers?: Record<string, string>) {
})
}
function sse(route: Route, events?: unknown[]) {
function sse(route: Route, events?: unknown[], retry?: number) {
return route.fulfill({
status: 200,
contentType: "text/event-stream",
body: events?.map((event) => `data: ${JSON.stringify(event)}\n\n`).join("") || ": ok\n\n",
body: `${retry === undefined ? "" : `retry: ${retry}\n\n`}${events?.map((event) => `data: ${JSON.stringify(event)}\n\n`).join("") || ": ok\n\n"}`,
})
}