feat(openclaw): add shopping, supermarket deals, geizhals, and ebay MCP tools

website/grabengasse_frontend/src/utils/weatherCalculations.ts

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+import type { TimeSeriesPoint } from '../types/weather'
+
+/**
+ * Calculate dew point (°C) from temperature (°C) and relative humidity (%)
+ * using the Magnus-Tetens formula.
+ */
+export function calculateDewPoint(
+  temperature?: number | null,
+  humidity?: number | null
+): number | null {
+  if (
+    temperature === undefined ||
+    temperature === null ||
+    humidity === undefined ||
+    humidity === null ||
+    humidity <= 0
+  ) {
+    return null
+  }
+
+  const a = 17.625
+  const b = 243.04
+
+  try {
+    const alpha = (a * temperature) / (b + temperature) + Math.log(humidity / 100)
+    const dewPoint = (b * alpha) / (a - alpha)
+    return Math.round(dewPoint * 10) / 10
+  } catch {
+    return null
+  }
+}
+
+/**
+ * Return thermal sensation / comfort level based on dew point (°C)
+ */
+export function getDewPointComfort(dewPoint?: number | null): {
+  text: string
+  color: string
+} {
+  if (dewPoint === undefined || dewPoint === null) {
+    return { text: 'Unknown', color: 'var(--retro-text-dim)' }
+  }
+  if (dewPoint < 10) {
+    return { text: 'Dry / Crisp', color: 'var(--retro-text-cyan)' }
+  } else if (dewPoint <= 15) {
+    return { text: 'Pleasant / Fresh', color: 'var(--retro-text-green)' }
+  } else if (dewPoint <= 18) {
+    return { text: 'Comfortable', color: 'var(--retro-text-amber)' }
+  } else if (dewPoint <= 21) {
+    return { text: 'Humid / Warm', color: 'var(--retro-text-amber)' }
+  } else {
+    return { text: 'Muggy / Oppressive', color: 'var(--retro-text-red)' }
+  }
+}
+
+/**
+ * Convert degrees (0-360°) to 16-wind compass rose direction
+ */
+export function getWindDirectionCardinal(degrees?: number | null): string {
+  if (degrees === undefined || degrees === null) return 'N/A'
+  const compassSectors = [
+    'N', 'NNE', 'NE', 'ENE', 'E', 'ESE', 'SE', 'SSE',
+    'S', 'SSW', 'SW', 'WSW', 'W', 'WNW', 'NW', 'NNW'
+  ]
+  const val = Math.floor((degrees / 22.5) + 0.5)
+  return compassSectors[val % 16]
+}
+
+/**
+ * Get UV Index category & retro color
+ */
+export function getUVIndexLevel(uv?: number | null): {
+  label: string
+  color: string
+} {
+  if (uv === undefined || uv === null) {
+    return { label: 'Low', color: 'var(--retro-text-green)' }
+  }
+  if (uv < 3) return { label: 'Low', color: 'var(--retro-text-green)' }
+  if (uv < 6) return { label: 'Moderate', color: 'var(--retro-text-amber)' }
+  if (uv < 8) return { label: 'High', color: 'var(--retro-text-amber)' }
+  if (uv < 11) return { label: 'Very High', color: 'var(--retro-text-red)' }
+  return { label: 'Extreme', color: 'var(--retro-accent-purple)' }
+}
+
+/**
+ * Calculate basic statistical properties (min, max, average, current) for a time series
+ */
+export function calculateHistoryStats(points?: TimeSeriesPoint[]): {
+  min: number | null
+  max: number | null
+  avg: number | null
+  current: number | null
+} {
+  if (!points || points.length === 0) {
+    return { min: null, max: null, avg: null, current: null }
+  }
+
+  let min = points[0].value
+  let max = points[0].value
+  let sum = 0
+
+  for (const p of points) {
+    if (p.value < min) min = p.value
+    if (p.value > max) max = p.value
+    sum += p.value
+  }
+
+  const avg = Math.round((sum / points.length) * 10) / 10
+  const current = points[points.length - 1].value
+
+  return {
+    min: Math.round(min * 10) / 10,
+    max: Math.round(max * 10) / 10,
+    avg,
+    current: Math.round(current * 10) / 10
+  }
+}