improved charts and baro pressure data

cmd/ingestd/web/app.js

@@ -163,6 +163,13 @@ function computeRange(range, tz) {
       axisEnd = end;
       break;
     }
+    case "72h-last": {
+      end = now;
+      start = new Date(now.getTime() - 72 * 60 * 60 * 1000);
+      axisStart = start;
+      axisEnd = end;
+      break;
+    }
     case "72h": {
       end = startOfDay(now, tz);
       start = new Date(end.getTime() - 72 * 60 * 60 * 1000);
@@ -170,6 +177,13 @@ function computeRange(range, tz) {
       axisEnd = end;
       break;
     }
+    case "7d-last": {
+      end = now;
+      start = new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000);
+      axisStart = start;
+      axisEnd = end;
+      break;
+    }
     case "7d": {
       start = startOfWeekSunday(now, tz);
       end = new Date(start.getTime() + 7 * 24 * 60 * 60 * 1000);
@@ -289,6 +303,58 @@ function updateText(id, text) {
   if (el) el.textContent = text;
 }
 
+function describeBarometer(pressure, trend) {
+  if (pressure === null || pressure === undefined) {
+    return "No barometer data yet.";
+  }
+
+  let pressureLabel = "normal";
+  if (pressure <= 1000) {
+    pressureLabel = "very low";
+  } else if (pressure < 1008) {
+    pressureLabel = "low";
+  } else if (pressure >= 1024) {
+    pressureLabel = "high";
+  }
+
+  let trendLabel = "steady";
+  if (trend !== null && trend !== undefined) {
+    if (trend <= -2.0) {
+      trendLabel = "falling fast";
+    } else if (trend <= -0.5) {
+      trendLabel = "falling";
+    } else if (trend >= 2.0) {
+      trendLabel = "rising fast";
+    } else if (trend >= 0.5) {
+      trendLabel = "rising";
+    }
+  }
+
+  let outlook = "Stable; no strong rain signal.";
+  if (trend !== null && trend !== undefined) {
+    if (trend <= -1.0 && pressure <= 1008) {
+      outlook = "Unsettled; rain more likely.";
+    } else if (trend <= -1.0) {
+      outlook = "Unsettled; rain possible.";
+    } else if (trend >= 1.0 && pressure >= 1020) {
+      outlook = "Improving; rain less likely.";
+    } else if (trend >= 1.0) {
+      outlook = "Improving; rain chance easing.";
+    }
+  } else if (pressure <= 1005) {
+    outlook = "Low pressure; rain possible.";
+  } else if (pressure >= 1022) {
+    outlook = "Fair weather likely.";
+  }
+
+  if (trend === null || trend === undefined) {
+    return `Pressure ${formatNumber(pressure, 1)} hPa (${pressureLabel}); trend unavailable. ${outlook}`;
+  }
+
+  const trendText = `${trend >= 0 ? "+" : ""}${trend.toFixed(1)} hPa/hr`;
+  return `Pressure ${formatNumber(pressure, 1)} hPa (${pressureLabel}), ${trendLabel} (${trendText}). ${outlook}`;
+}
+
 function lastNonNull(points, key) {
   for (let i = points.length - 1; i >= 0; i -= 1) {
     const v = points[i][key];
@@ -461,6 +527,7 @@ function renderDashboard(data) {
   } else {
     updateText("live-rain-prob", "--");
   }
+  updateText("baro-outlook", describeBarometer(latest ? latest.pressure_hpa : null, lastPressureTrend));
 
   const obsTemps = obsFiltered.map((p) => p.temp_c);
   const obsWinds = obsFiltered.map((p) => p.wind_m_s);