opencode / packages /app /src /context /global-sync /home-session-index.ts
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import type { Event, Session, SessionV2Info, V2SessionListResponse } from "@opencode-ai/sdk/v2/client"
import type { QueryClient } from "@tanstack/solid-query"
import { trimSessions } from "./session-trim"
import { pathKey } from "@/utils/path-key"
export const HOME_V2_SESSION_PAGE_LIMIT = 5_000
export type HomeSessionEvent = {
type: "session.created" | "session.updated" | "session.deleted"
properties: { sessionID: string; info: Session }
}
export type HomeSessionEvents = {
sequence: number
entries: Array<{ sequence: number; event: HomeSessionEvent }>
}
export type HomeSessionIndex = {
sessions: Session[]
eventSequence: number
}
export const homeSessionIndexKey = (server: string) => ["home", "session-index", server] as const
export const homeSessionEventsKey = (server: string) => ["home", "session-events", server] as const
type HomeSessionPage = { data?: V2SessionListResponse }
export async function loadHomeSessionIndex(
list: (
input: { limit: number; order: "desc"; cursor?: string },
options: { signal?: AbortSignal },
) => Promise<HomeSessionPage>,
eventSequence = 0,
signal?: AbortSignal,
) {
const data: SessionV2Info[] = []
let cursor: string | undefined
for (;;) {
const response = await list(
{
limit: HOME_V2_SESSION_PAGE_LIMIT,
order: "desc",
...(cursor ? { cursor } : {}),
},
{ signal },
)
const page = response.data!
data.push(...page.data)
if (page.data.length < HOME_V2_SESSION_PAGE_LIMIT || !page.cursor.next)
return { sessions: parseHomeSessionIndex(data), eventSequence }
cursor = page.cursor.next
}
}
export function appendHomeSessionEvent(current: HomeSessionEvents | undefined, event: HomeSessionEvent) {
const sequence = (current?.sequence ?? 0) + 1
return {
sequence,
entries: [...(current?.entries ?? []), { sequence, event }],
}
}
export function trimHomeSessionEvents(current: HomeSessionEvents | undefined, sequence: number): HomeSessionEvents {
return {
sequence: current?.sequence ?? sequence,
entries: (current?.entries ?? []).filter((entry) => entry.sequence > sequence),
}
}
export function homeSessionIndexSessions(index: HomeSessionIndex | undefined, events: HomeSessionEvents | undefined) {
if (!index) return []
return (events?.entries ?? [])
.filter((entry) => entry.sequence > index.eventSequence)
.reduce((sessions, entry) => applyHomeSessionEvent(sessions, entry.event), index.sessions)
}
export function homeSessionIndexRefresh(event: Event["type"], connected: boolean) {
if (event === "server.connected") return { connected: true, refetch: connected }
return {
connected,
refetch: event === "global.disposed" || event === "session.next.moved",
}
}
export function createHomeSessionIndexCache(queryClient: QueryClient, server: string) {
const indexKey = homeSessionIndexKey(server)
const eventsKey = homeSessionEventsKey(server)
let connected = false
const removed = new Set<string>()
return {
indexKey,
eventsKey,
eventSequence() {
return queryClient.getQueryData<HomeSessionEvents>(eventsKey)?.sequence ?? 0
},
complete(sequence: number) {
// Keep events received after the fetch began so its response cannot overwrite them.
queryClient.setQueryData<HomeSessionEvents>(eventsKey, (current) => trimHomeSessionEvents(current, sequence))
},
sessions(index: HomeSessionIndex | undefined, events: HomeSessionEvents | undefined) {
const sessions = homeSessionIndexSessions(index, events)
return removed.size === 0 ? sessions : sessions.filter((session) => !removed.has(session.id))
},
apply(event: HomeSessionEvent) {
if (!queryClient.getQueryState(indexKey)) return
const next = appendHomeSessionEvent(queryClient.getQueryData<HomeSessionEvents>(eventsKey), event)
if (queryClient.isFetching({ queryKey: indexKey, exact: true }) > 0) {
queryClient.setQueryData(eventsKey, next)
return
}
const index = queryClient.getQueryData<HomeSessionIndex>(indexKey)
if (index) {
queryClient.setQueryData<HomeSessionIndex>(indexKey, {
sessions: homeSessionIndexSessions(index, next),
eventSequence: next.sequence,
})
}
queryClient.setQueryData<HomeSessionEvents>(eventsKey, { sequence: next.sequence, entries: [] })
},
remove(sessionID: string) {
removed.add(sessionID)
if (!queryClient.getQueryState(indexKey)) return
queryClient.setQueryData<HomeSessionIndex>(indexKey, (index) => {
if (!index) return index
const at = index.sessions.findIndex((session) => session.id === sessionID)
if (at === -1) return index
return { ...index, sessions: index.sessions.toSpliced(at, 1) }
})
},
refresh(event: Event["type"]) {
const result = homeSessionIndexRefresh(event, connected)
connected = result.connected
if (!result.refetch) return
void queryClient.refetchQueries({ queryKey: indexKey, exact: true, type: "active" })
},
}
}
// TODO(v2): This deliberately dumb full-table scan is necessary because the
// current V2 API orders by creation time and cannot filter roots, archives, or
// multiple directories. A bounded page could omit an old session updated today.
// Once released, use client.v2.project.list() and client.v2.session.list({
// parentID: null, order: "desc" }), then remove this adapter and its V1 fields.
export function parseHomeSessionIndex(sessions: SessionV2Info[]): Session[] {
return sessions.flatMap((item) => {
if (item.parentID || typeof item.time.archived === "number") return []
return [toLegacySummary(item)]
})
}
export function retainHomeSessions(sessions: Session[], limit: number, now: number) {
const grouped = Map.groupBy(sessions, (session) => pathKey(session.directory))
return [...grouped.values()].flatMap((items) => trimSessions(items, { limit, permission: {}, now }))
}
export function applyHomeSessionEvent(sessions: Session[], event: HomeSessionEvent) {
const info = event.properties.info
const index = sessions.findIndex((session) => session.id === info.id)
if (event.type === "session.deleted" || info.parentID || typeof info.time.archived === "number") {
if (index === -1) return sessions
return sessions.toSpliced(index, 1)
}
if (event.type !== "session.created" && event.type !== "session.updated") return sessions
if (index === -1) return [...sessions, info]
return sessions.with(index, info)
}
function toLegacySummary(session: SessionV2Info): Session {
return {
id: session.id,
slug: session.id,
projectID: session.projectID,
workspaceID: session.location.workspaceID,
directory: session.location.directory,
path: session.subpath,
parentID: session.parentID,
cost: session.cost,
tokens: session.tokens,
title: session.title,
agent: session.agent,
model: session.model,
version: "",
time: session.time,
}
}