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* Pure view-model helpers for the Sessions activity monitor.
*
* All branchy logic (status normalization, filtering, grouping, sorting, and
* filter-chip derivation) lives here so it can be unit-tested directly. The
* SessionsTable component is intentionally kept to straight-line JSX that
* consumes these helpers.
*
* @module
*/
import type { Environment, Session } from "../../hooks/types.js";
import { capitalize } from "../../utils/sessionStatus.js";
/**
* A normalized status "tone": a small, stable set of buckets that both the raw
* database session statuses and the live-event mapped statuses collapse into.
* Drives colour, iconography, and filtering.
*
* This is intentionally distinct from {@link ../../utils/sessionStatus.js}'s
* `sessionStatusStyle`, which the Coordination graph uses: that mapping
* de-emphasizes finished sessions (completed -> neutral grey) and has no
* `pending`/`paused`/endReason concepts. The Sessions activity monitor instead
* wants a richer, success-positive palette (completed -> green) plus the extra
* buckets that drive its status filter chips, so the two are kept separate by
* design rather than unified.
*/
export type StatusTone =
| "running"
| "idle"
| "pending"
| "success"
| "error"
| "paused"
| "neutral";
/** A human-readable description of a session's status. */
export interface SessionStatusDescriptor {
/** Normalized tone bucket used for colour/icon/filter. */
tone: StatusTone;
/** Capitalized display label (e.g. "Running", "Completed"). */
label: string;
}
/** Tones considered "active" (the session is live, not finished or paused). */
const ACTIVE_TONES: ReadonlySet<StatusTone> = new Set<StatusTone>(["running", "idle", "pending"]);
/** Display order for status filter chips and grouping. */
export const TONE_ORDER: readonly StatusTone[] = [
"running",
"idle",
"pending",
"success",
"paused",
"error",
"neutral",
];
/** Category labels for status filter chips (broader than per-status labels). */
export const TONE_LABELS: Readonly<Record<StatusTone, string>> = {
running: "Running",
idle: "Idle",
pending: "Pending",
success: "Completed",
paused: "Paused",
error: "Failed",
neutral: "Other",
};
/**
* Describe a terminal ("stopped") session by its `endReason`.
*
* Sessions reach a generic `stopped` status via live status events; the
* `endReason` distinguishes a clean completion from an error/kill.
*/
function describeStopped(endReason: string | undefined): SessionStatusDescriptor {
// Cases mirror grackle.END_REASON. A non-clean stop (killed/interrupted/
// terminated/budget_exceeded/error) is an error tone so it lands in the
// "Failed" filter bucket rather than the neutral "Stopped" fallback.
switch (endReason) {
case "completed":
return { tone: "success", label: "Completed" };
case "killed":
return { tone: "error", label: "Killed" };
case "interrupted":
return { tone: "error", label: "Interrupted" };
case "terminated":
return { tone: "error", label: "Terminated" };
case "budget_exceeded":
return { tone: "error", label: "Budget exceeded" };
case "error":
return { tone: "error", label: "Error" };
default:
return { tone: "neutral", label: "Stopped" };
}
}
/**
* Map a session's raw status (and `endReason`) to a normalized tone + label.
*
* Handles both the raw database statuses returned by `ListSessions`
* (`running`, `completed`, `failed`, ...) and the collapsed `stopped` status
* produced by live status events (disambiguated via `endReason`).
*/
export function describeSessionStatus(
session: Pick<Session, "status" | "endReason">,
): SessionStatusDescriptor {
switch (session.status) {
case "running":
return { tone: "running", label: "Running" };
case "idle":
case "waiting_input":
return { tone: "idle", label: "Idle" };
case "pending":
return { tone: "pending", label: "Pending" };
case "suspended":
return { tone: "paused", label: "Suspended" };
case "hibernating":
return { tone: "paused", label: "Hibernating" };
case "completed":
return { tone: "success", label: "Completed" };
case "failed":
return { tone: "error", label: "Failed" };
case "killed":
return { tone: "error", label: "Killed" };
case "interrupted":
return { tone: "error", label: "Interrupted" };
case "terminated":
return { tone: "error", label: "Terminated" };
case "stopped":
return describeStopped(session.endReason);
default:
return { tone: "neutral", label: capitalize(session.status) || "Unknown" };
}
}
/** Whether a tone represents a live (active) session. */
export function isActiveTone(tone: StatusTone): boolean {
return ACTIVE_TONES.has(tone);
}
/** Whether a session is currently active (live), by its normalized tone. */
export function isActiveSession(session: Pick<Session, "status" | "endReason">): boolean {
return isActiveTone(describeSessionStatus(session).tone);
}
/** A status filter selection: a specific tone, or `"all"` for no filter. */
export type StatusFilter = StatusTone | "all";
/** A single status filter chip with its display label and matching count. */
export interface StatusChip {
/** Filter value this chip selects. */
value: StatusFilter;
/** Display label. */
label: string;
/** Number of sessions matching this chip. */
count: number;
}
/**
* Build the ordered list of status filter chips for a set of sessions.
*
* Always begins with an "All" chip, followed by one chip per tone that is
* actually present (in {@link TONE_ORDER}), each annotated with its count.
* Chips for absent tones are omitted so the bar stays uncluttered.
*/
export function buildStatusChips(sessions: readonly Session[]): StatusChip[] {
const counts = new Map<StatusTone, number>();
for (const session of sessions) {
const { tone } = describeSessionStatus(session);
counts.set(tone, (counts.get(tone) ?? 0) + 1);
}
const chips: StatusChip[] = [{ value: "all", label: "All", count: sessions.length }];
for (const tone of TONE_ORDER) {
const count = counts.get(tone);
if (count !== undefined && count > 0) {
chips.push({ value: tone, label: TONE_LABELS[tone], count });
}
}
return chips;
}
/**
* Whether a session matches a free-text query, checked against its prompt,
* runtime, id, task id, and resolved environment name. An empty query matches
* everything. Matching is case-insensitive.
*/
export function sessionMatchesQuery(
session: Session,
query: string,
environmentName: string,
): boolean {
const trimmed = query.trim().toLowerCase();
if (trimmed.length === 0) {
return true;
}
const haystack = [
session.prompt,
session.runtime,
session.id,
session.taskId ?? "",
environmentName,
]
.join(" ")
.toLowerCase();
return haystack.includes(trimmed);
}
/**
* Apply the status-tone filter and free-text query to a list of sessions.
*
* @param sessions - Sessions to filter.
* @param status - Selected status filter, or `"all"`.
* @param query - Free-text query (empty string matches all).
* @param environmentNameById - Map of environment id to display name, used for
* both query matching and so a missing environment falls back to its id.
*/
export function filterSessions(
sessions: readonly Session[],
status: StatusFilter,
query: string,
environmentNameById: ReadonlyMap<string, string>,
): Session[] {
return sessions.filter((session) => {
if (status !== "all" && describeSessionStatus(session).tone !== status) {
return false;
}
const environmentName = environmentNameById.get(session.environmentId) ?? session.environmentId;
return sessionMatchesQuery(session, query, environmentName);
});
}
/** A group of sessions belonging to a single environment. */
export interface SessionGroup {
/** Environment id this group is keyed by. */
environmentId: string;
/** The environment, if it still exists (may be undefined for a gone env). */
environment: Environment | undefined;
/** Sessions in this group, newest first. */
sessions: Session[];
/** Number of active (live) sessions in this group. */
activeCount: number;
/** ISO timestamp of the most recently started session in this group. */
latestStartedAt: string;
}
/** Compare two ISO timestamps for a newest-first sort. */
function byNewest(a: string, b: string): number {
return b.localeCompare(a);
}
/**
* Group sessions by their environment, returning groups ready for display.
*
* Within each group, sessions are ordered newest-first. Groups are ordered so
* that those with active sessions appear first, then by most-recent activity,
* with a stable alphabetical tie-break on environment name. Environments with
* no sessions are not represented (this is a session inventory, not an env
* list); environments that no longer exist still get a group keyed by id.
*/
export function groupSessionsByEnvironment(
sessions: readonly Session[],
environments: readonly Environment[],
): SessionGroup[] {
const environmentById = new Map<string, Environment>(environments.map((e) => [e.id, e]));
const byEnvironment = new Map<string, Session[]>();
for (const session of sessions) {
const existing = byEnvironment.get(session.environmentId);
if (existing) {
existing.push(session);
} else {
byEnvironment.set(session.environmentId, [session]);
}
}
const groups: SessionGroup[] = [];
for (const [environmentId, groupSessions] of byEnvironment) {
const sorted = [...groupSessions].sort((a, b) => byNewest(a.startedAt, b.startedAt));
const activeCount = sorted.filter((s) => isActiveSession(s)).length;
// `sorted` is newest-first, so the head is the most recently started.
const latestStartedAt = sorted[0]?.startedAt ?? "";
groups.push({
environmentId,
environment: environmentById.get(environmentId),
sessions: sorted,
activeCount,
latestStartedAt,
});
}
const nameOf = (group: SessionGroup): string =>
group.environment?.displayName ?? group.environmentId;
return groups.sort((a, b) => {
const aActive = a.activeCount > 0 ? 1 : 0;
const bActive = b.activeCount > 0 ? 1 : 0;
if (aActive !== bActive) {
return bActive - aActive;
}
const byActivity = byNewest(a.latestStartedAt, b.latestStartedAt);
if (byActivity !== 0) {
return byActivity;
}
return nameOf(a).localeCompare(nameOf(b));
});
}
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