Function deleteMessageParts

packages/app/src/context/server-session.ts:157–166

(
    cache: { part: Record<string, Part[] | undefined>; part_text_accum_delta: Record<string, string | undefined> },
    messageID: string,
  )

  const removedMessages = new Map<string, Set<string>>()
  const deltaBases = new Map<string, { base: string; sessionID: string }>()
  const deleteMessageParts = (
    cache: { part: Record<string, Part[] | undefined>; part_text_accum_delta: Record<string, string | undefined> },
    messageID: string,
  ) => {
    for (const part of cache.part[messageID] ?? []) {
      delete cache.part_text_accum_delta[part.id]
      deltaBases.delete(part.id)
    }
    delete cache.part[messageID]
  }
  const seen = new Set<string>()
  const infoSeen = new Set<string>()
  const pinned = new Map<string, number>()