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import type {
Message,
Part,
PermissionRequest,
QuestionRequest,
SessionStatus,
SnapshotFileDiff,
Todo,
} from "@opencode-ai/sdk/v2/client"
export const SESSION_CACHE_LIMIT = 40
type SessionCache = {
session_status: Record<string, SessionStatus | undefined>
session_diff: Record<string, SnapshotFileDiff[] | undefined>
todo: Record<string, Todo[] | undefined>
message: Record<string, Message[] | undefined>
part: Record<string, Part[] | undefined>
permission: Record<string, PermissionRequest[] | undefined>
question: Record<string, QuestionRequest[] | undefined>
}
export function dropSessionCaches(store: SessionCache, sessionIDs: Iterable<string>) {
const stale = new Set(Array.from(sessionIDs).filter(Boolean))
if (stale.size === 0) return
for (const key of Object.keys(store.part)) {
const parts = store.part[key]
if (!parts?.some((part) => stale.has(part?.sessionID ?? ""))) continue
delete store.part[key]
}
for (const sessionID of stale) {
delete store.message[sessionID]
delete store.todo[sessionID]
delete store.session_diff[sessionID]
delete store.session_status[sessionID]
delete store.permission[sessionID]
delete store.question[sessionID]
}
}
export function pickSessionCacheEvictions(input: {
seen: Set<string>
keep: string
limit: number
preserve?: Iterable<string>
}) {
const stale: string[] = []
const keep = new Set([input.keep, ...Array.from(input.preserve ?? [])])
if (input.seen.has(input.keep)) input.seen.delete(input.keep)
input.seen.add(input.keep)
for (const id of input.seen) {
if (input.seen.size - stale.length <= input.limit) break
if (keep.has(id)) continue
stale.push(id)
}
for (const id of stale) {
input.seen.delete(id)
}
return stale
}
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