Versie 0.2.0

server/data/commands.js

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+// Generated, do not edit. sha256:d8bebac302697ff7428ee4125057b7ffc589ad6f6f375379f00af756b5b865fc
+import * as db from '../db.js';
+import { CONFIG, ENUMS } from '../../shared/config.js';
+import { assertEnum, nowIso } from './_shared.js';
+import { emitChange } from './_events.js';
+
+function uitRij(r) {
+  if (!r) return r;
+  let lading = null;
+  if (r.payload != null) {
+    try { lading = JSON.parse(r.payload); } catch { lading = null; }
+  }
+  return { ...r, payload: lading };
+}
+
+export async function createCommand({ kind, payload = null, expiresAt = null }) {
+  assertEnum('kind', ENUMS.COMMAND_KIND, kind);
+  db.run(`INSERT INTO Command (kind, payload, state, expiresAt, createdAt) VALUES (?,?,?,?,?)`,
+    [kind, payload == null ? null : JSON.stringify(payload), 'open', expiresAt, nowIso()]);
+  const id = db.lastId();
+  pruneCommands();
+  await db.persist();
+  emitChange('commands-changed');
+  return id;
+}
+
+export async function claimNextCommand(tabblad, soorten = null) {
+  if (!tabblad) throw new Error('A claim without a tab cannot be assigned.');
+  const lijst = soorten == null ? null : [...soorten];
+  if (lijst) {
+    if (!lijst.length) throw new Error('A claim on zero kinds can never yield anything.');
+    for (const soort of lijst) assertEnum('kind', ENUMS.COMMAND_KIND, soort);
+  }
+  const nu = nowIso();
+  db.run(`UPDATE Command SET state = 'expired', detail = ?, resolvedAt = ?
+          WHERE state = 'open' AND expiresAt IS NOT NULL AND expiresAt < ?`,
+    ['Niemand heeft deze opdracht op tijd opgepakt.', nu, nu]);
+  const filter = lijst ? `AND kind IN (${lijst.map(() => '?').join(',')})` : '';
+  db.run(`UPDATE Command SET state = 'claimed', claimedBy = ?, claimedAt = ?
+          WHERE id = (SELECT id FROM Command WHERE state = 'open' ${filter} ORDER BY id LIMIT 1)`,
+    [String(tabblad), nu, ...(lijst || [])]);
+  const rij = db.one(`SELECT * FROM Command WHERE state = 'claimed' AND claimedBy = ? AND resolvedAt IS NULL
+                      ORDER BY id DESC LIMIT 1`, [String(tabblad)]);
+  await db.persist();
+  return uitRij(rij) || null;
+}
+
+export async function resolveCommand(id, tabblad, uitkomst, detail = null) {
+  assertEnum('state', ENUMS.COMMAND_STATE, uitkomst);
+  if (uitkomst === 'open' || uitkomst === 'claimed') {
+    throw new Error(`'${uitkomst}' is not a conclusion; a command closes as done, rejected or expired.`);
+  }
+  db.run(`UPDATE Command SET state = ?, detail = ?, resolvedAt = ?
+          WHERE id = ? AND claimedBy = ? AND resolvedAt IS NULL`,
+    [uitkomst, detail, nowIso(), Number(id), String(tabblad)]);
+  await db.persist();
+  emitChange('commands-changed');
+}
+
+export function getCommand(id) {
+  return uitRij(db.one(`SELECT * FROM Command WHERE id = ?`, [Number(id)])) || null;
+}
+
+export function pruneCommands(uren = CONFIG.COMMANDS.RETENTION_HOURS) {
+  const grens = new Date(Date.now() - Math.max(1, Number(uren) || CONFIG.COMMANDS.RETENTION_HOURS) * 3600_000)
+    .toISOString();
+  const r = db.one(`SELECT COUNT(*) AS n FROM Command WHERE resolvedAt IS NOT NULL AND resolvedAt < ?`, [grens]);
+  const aantal = r ? r.n : 0;
+  if (aantal) db.run(`DELETE FROM Command WHERE resolvedAt IS NOT NULL AND resolvedAt < ?`, [grens]);
+  return aantal;
+}