3.5

UI Overhaul Profiles now in popup Current profile always on screen Hidden columns only when edit neeeded Add pulldowns in to profile config Customised the day tabs for vehicle, indoor and pet
2026-07-18 15:45:20 +01:00
parent f92e191a44
commit 916efca55e
13 changed files with 1594 additions and 610 deletions
@@ -0,0 +1,52 @@
+// ------------------------------------------------------------------------
+//  activity-profile.js - Estimates the % chance of a good viewing on a given
+//  day for a multi-day cosmic event (meteor shower, conjunction), based on
+//  how far that day sits from the event's peak.
+//
+//  The calendar data only has start/end/peak dates, not real activity
+//  curves, so this is a simplified heuristic (not live forecast data):
+//  chance falls off exponentially from 100% at peak, halving every
+//  `riseTau`/`decayTau` days on the approach/departure side. Values below
+//  are rough approximations of each shower's real-world activity profile
+//  (sharp showers like the Quadrantids get small tau, broad ones like the
+//  Eta Aquariids get larger tau) - good enough to gate "is this worth
+//  looking up for" without pretending to be precise astronomy.
+//
+//  Single-day events (start === end) are always 100% - they only ever
+//  appear in COSMIC_CALENDAR on their one active day anyway.
+// ------------------------------------------------------------------------
+
+const ACTIVITY_PROFILES = {
+  quadrantids:                { riseTau: 0.3, decayTau: 0.4 },
+  lyrids:                     { riseTau: 0.6, decayTau: 0.7 },
+  'eta-aquariids':             { riseTau: 3.5, decayTau: 3.0 },
+  perseids:                    { riseTau: 2.2, decayTau: 1.8 },
+  orionids:                    { riseTau: 1.5, decayTau: 1.5 },
+  leonids:                     { riseTau: 0.5, decayTau: 0.6 },
+  geminids:                    { riseTau: 1.0, decayTau: 1.0 },
+  ursids:                      { riseTau: 0.4, decayTau: 0.4 },
+  'mars-conjunction':          { riseTau: 1.0, decayTau: 1.0 },
+  'venus-jupiter-conjunction': { riseTau: 1.0, decayTau: 1.0 },
+};
+
+const DEFAULT_PROFILE = { riseTau: 1.0, decayTau: 1.0 };
+
+function baseKey(id) {
+  return String(id).replace(/-\d{4}$/, '');
+}
+
+export function getActivityProfile(id) {
+  return ACTIVITY_PROFILES[baseKey(id)] || DEFAULT_PROFILE;
+}
+
+// Returns an integer 0-100.
+export function activityChance(ev, dateStr) {
+  if (!ev.peak || ev.start === ev.end) return 100;
+  const today = new Date(dateStr + 'T00:00Z');
+  const peak = new Date(ev.peak + 'T00:00Z');
+  const diffDays = (today - peak) / 86400000;
+  const { riseTau, decayTau } = getActivityProfile(ev.id);
+  const tau = diffDays <= 0 ? riseTau : decayTau;
+  const pct = 100 * Math.pow(0.5, Math.abs(diffDays) / tau);
+  return Math.round(pct);
+}