stackchain-dashboard/frontend/progressive-my-work.js

function createProgressiveMyWork({
  document, fetchSnapshot, pollerOptions = {}, lifecycleTarget = globalThis,
}) {
  const list = document.querySelector('#my-work-list');
  const status = document.querySelector('#my-work-status');
  const filters = Array.from(document.querySelectorAll('[data-work-filter]'));
  const listeners = [];
  const lifecycleListeners = [];
  let items = [];
  let active = 'all';
  let stopped = false;
  let selectedByUser = false;
  let liveSnapshot = null;
  let liveSnapshotPromise = null;
  let confirmedLogin = '';
  let poller = null;
  const deferredQueues = {
    today:'Today', agenda:'Agenda', later:'Later', draft:'Drafts',
  };

  const escapeHtml = value => String(value || '').replace(/[&<>"']/g, character => ({
    '&':'&amp;', '<':'&lt;', '>':'&gt;', '"':'&quot;', "'":'&#39;',
  })[character]);
  const safeUrl = value => {
    try {
      const url = new URL(String(value || ''), globalThis.location?.href || 'https://invalid.example/');
      return ['http:', 'https:'].includes(url.protocol) ? url.href : '';
    } catch (_error) { return ''; }
  };
  const matches = (item, filter) =>
    filter === 'review' ? item.is_review :
      filter === 'update' ? item.has_update :
        filter === 'attention' ? item.needs_attention :
          filter === 'filed' ? item.is_filed :
            filter === 'authored' ? item.is_authored :
              filter === 'pull' ? item.kind === 'pull' && !item.is_review : item.kind === filter;
  const visibleItems = () => active === 'all' ? items : items.filter(item => matches(item, active));
  const updateCounts = () => {
    ['all','attention','filed','authored','issue','pull','review','update'].forEach(filter => {
      const count = filter === 'all' ? items.length : items.filter(item => matches(item, filter)).length;
      const element = document.querySelector('[data-work-count="' + filter + '"]');
      if (element) element.textContent = String(count);
    });
  };
  const render = () => {
    if (stopped || !list) return;
    const visible = visibleItems();
    list.innerHTML = deferredQueues[active] ?
      '<div class="muted">' + deferredQueues[active] + ' is still loading…</div>' : visible.length ? visible.map(item => {
      const href = safeUrl(item.url);
      const title = escapeHtml(item.title || item.key || 'Untitled work');
      const context = escapeHtml(item.key || '');
      const reason = escapeHtml(item.reason || 'Assigned to you');
      return '<article class="my-work-card progressive-my-work-card">' +
        (href ? '<a class="my-work-card-main" href="' + escapeHtml(href) + '">' : '<div class="my-work-card-main">') +
        '<strong>' + title + '</strong><span class="small">' + context + ' · ' + reason + '</span>' +
        (href ? '</a>' : '</div>') + '</article>';
    }).join('') : '<div class="muted">No work in this queue.</div>';
    filters.forEach(button => button.setAttribute('aria-pressed', String(button.dataset.workFilter === active)));
  };
  filters.forEach(button => {
    const listener = () => { active = button.dataset.workFilter || 'all'; selectedByUser = true; render(); };
    button.addEventListener('click', listener);
    listeners.push([button, listener]);
  });

  const applySnapshot = snapshot => {
    if (stopped) return false;
    const transferable = snapshot && typeof snapshot === 'object' &&
      Object.prototype.hasOwnProperty.call(snapshot, 'context');
    if (transferable) liveSnapshot = snapshot;
    const context = snapshot?.context || snapshot || {};
    confirmedLogin = String(context.user?.login || '').trim();
    items = buildMyWork({ ...context, notifications:snapshot?.notifications || context.notifications || [] });
    updateCounts();
    render();
    const assigned = items.filter(item => item.is_assigned).length;
    if (status) status.textContent = assigned + ' assigned work item' + (assigned === 1 ? '' : 's') + ' ready.';
    return true;
  };

  if (typeof createContextPoller === 'function') {
    poller = createContextPoller({
      ...pollerOptions,
      fetchContext: fetchSnapshot,
      onSnapshot: applySnapshot,
      onError: () => {
        if (status && !stopped) status.textContent = 'Assigned work is reconnecting…';
      },
      isHidden: pollerOptions.isHidden || (() => Boolean(document.hidden)),
    });
    const recover = () => {
      if (!document.hidden) void poller.refresh();
    };
    ['online', 'visibilitychange'].forEach(eventName => {
      lifecycleTarget.addEventListener?.(eventName, recover);
      lifecycleListeners.push([eventName, recover]);
    });
  }

  return {
    login() { return confirmedLogin; },
    handoff() {
      const state = { selectedFilter:selectedByUser ? active : null };
      if (liveSnapshot) {
        state.liveSnapshot = liveSnapshot;
        liveSnapshot = null;
        liveSnapshotPromise = null;
      } else if (liveSnapshotPromise) {
        state.liveSnapshotPromise = liveSnapshotPromise;
        liveSnapshotPromise = null;
      }
      return state;
    },
    async start() {
      if (status) status.textContent = 'Loading assigned work…';
      if (poller) {
        const request = poller.start();
        liveSnapshotPromise = request.then(snapshot => (
          snapshot && typeof snapshot === 'object' &&
          Object.prototype.hasOwnProperty.call(snapshot, 'context') ? snapshot : null
        ));
        return Boolean(await request);
      }
      const request = Promise.resolve().then(() => fetchSnapshot());
      liveSnapshotPromise = request.then(snapshot => (
        snapshot && typeof snapshot === 'object' &&
        Object.prototype.hasOwnProperty.call(snapshot, 'context') ? snapshot : null
      ), () => null);
      try {
        const snapshot = await request;
        if (stopped) return false;
        const applied = applySnapshot(snapshot);
        if (!liveSnapshot) liveSnapshotPromise = null;
        return applied;
      } catch (_error) {
        if (status && !stopped) status.textContent = 'Assigned work is reconnecting…';
        return false;
      }
    },
    stop() {
      stopped = true;
      poller?.stop();
      listeners.forEach(([button, listener]) => button.removeEventListener?.('click', listener));
      lifecycleListeners.forEach(([eventName, listener]) =>
        lifecycleTarget.removeEventListener?.(eventName, listener));
    },
  };
}

if (typeof window !== 'undefined' && typeof document !== 'undefined') {
  window.stackchainProgressiveMyWork = createProgressiveMyWork({
    document,
    lifecycleTarget: window,
    fetchSnapshot: async (revisions = {}, { signal } = {}) => {
      const query = createContextPoller.buildRevisionQuery(revisions);
      const response = await fetch('api/v1/live' + (query ? '?' + query : ''), {
        headers:{Accept:'application/json'}, signal,
      });
      if (!response.ok) {
        const error = new Error('HTTP ' + response.status);
        error.retryAfterMs = createContextPoller.retryAfterMs(response.headers.get('Retry-After'));
        throw error;
      }
      return response.json();
    },
  });
  void window.stackchainProgressiveMyWork.start();
}

if (typeof module !== 'undefined' && module.exports) module.exports = createProgressiveMyWork;