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+<?php
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+/**
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+ * api/weather.php
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+ *
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+ * Returns current weather + 7-day forecast + past 7 days of daily rainfall
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+ * for the logged-in user's location, sourced from Open-Meteo (free, no API key).
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+ *
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+ * Flow:
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+ * 1. Load user's postcode from client_records
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+ * 2. Geocode postcode → lat/lng via Nominatim (OpenStreetMap, free)
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+ * 3. Call Open-Meteo for current conditions, daily forecast, past rainfall
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+ * 4. Cache result in session for 30 minutes
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+ * 5. Return JSON
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+ *
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+ * GET params: none required (uses session user)
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+ * Optional: ?lat=<lat>&lng=<lng> (manual override)
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+ */
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+
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+if (session_status() === PHP_SESSION_NONE) {
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+ session_start();
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+}
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+
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+require_once __DIR__ . '/../config/database.php';
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+require_once __DIR__ . '/../lib/auth.php';
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+
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+header('Content-Type: application/json');
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+
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+if (!isLoggedIn()) {
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+ http_response_code(401);
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+ echo json_encode(['error' => 'Not authenticated']);
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+ exit;
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+}
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+
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+$userId = getCurrentUserId();
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+
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+// ── Manual lat/lng override ───────────────────────────────────────────────────
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+$manualLat = isset($_GET['lat']) && is_numeric($_GET['lat']) ? (float)$_GET['lat'] : null;
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+$manualLng = isset($_GET['lng']) && is_numeric($_GET['lng']) ? (float)$_GET['lng'] : null;
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+
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+// ── Session cache (30 min) ────────────────────────────────────────────────────
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+$cacheKey = 'weather_' . $userId . ($manualLat ? "_{$manualLat}_{$manualLng}" : '');
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+if (
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+ !$manualLat
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+ && isset($_SESSION[$cacheKey], $_SESSION[$cacheKey . '_ts'])
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+ && (time() - $_SESSION[$cacheKey . '_ts']) < 1800
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+) {
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+ echo $_SESSION[$cacheKey];
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+ exit;
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+}
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+
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+// ── Resolve lat/lng ───────────────────────────────────────────────────────────
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+$lat = $manualLat;
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+$lng = $manualLng;
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+$locationLabel = 'Your Location';
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+
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+if (!$lat) {
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+ // Load client postcode
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+ $postcode = null;
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+ try {
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+ $pdo = getDBConnection();
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+ $stmt = $pdo->prepare(
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+ 'SELECT state_postcode, address FROM client_records WHERE modx_user_id = ? LIMIT 1'
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+ );
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+ $stmt->execute([$userId]);
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+ $client = $stmt->fetch(PDO::FETCH_ASSOC);
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+ if ($client && !empty($client['state_postcode'])) {
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+ // Extract just the postcode portion (e.g. "SA 5000" → "5000")
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+ preg_match('/\d{4}/', $client['state_postcode'], $m);
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+ $postcode = $m[0] ?? null;
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+ $locationLabel = trim($client['state_postcode']);
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+ }
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+ } catch (PDOException $e) {
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+ error_log('weather.php DB error: ' . $e->getMessage());
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+ }
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+
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+ if ($postcode) {
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+ // Geocode via Nominatim
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+ $geocodeUrl = 'https://nominatim.openstreetmap.org/search?'
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+ . http_build_query([
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+ 'postalcode' => $postcode,
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+ 'country' => 'AU',
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+ 'format' => 'json',
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+ 'limit' => 1,
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+ ]);
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+
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+ $ch = curl_init($geocodeUrl);
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+ curl_setopt_array($ch, [
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+ CURLOPT_RETURNTRANSFER => true,
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+ CURLOPT_TIMEOUT => 5,
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+ CURLOPT_HTTPHEADER => ['User-Agent: CropMonitor/1.0 (contact@cropmonitor.com.au)'],
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+ ]);
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+ $geoResp = curl_exec($ch);
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+ curl_close($ch);
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+
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+ if ($geoResp) {
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+ $geoData = json_decode($geoResp, true);
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+ if (!empty($geoData[0]['lat'])) {
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+ $lat = (float)$geoData[0]['lat'];
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+ $lng = (float)$geoData[0]['lon'];
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+ }
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+ }
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+ }
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+
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+ // Default to Adelaide if geocoding fails
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+ if (!$lat) {
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+ $lat = -34.9285;
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+ $lng = 138.6007;
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+ $locationLabel = 'Adelaide, SA (default)';
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+ }
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+}
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+
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+// ── Open-Meteo API call ───────────────────────────────────────────────────────
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+// current: temperature, apparent temp, weather code, wind speed, humidity, precipitation
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+// daily (14 days: 7 past + 7 forecast): max/min temp, precipitation sum, weather code
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+$meteoUrl = 'https://api.open-meteo.com/v1/forecast?' . http_build_query([
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+ 'latitude' => round($lat, 4),
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+ 'longitude' => round($lng, 4),
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+ 'current' => 'temperature_2m,apparent_temperature,weather_code,wind_speed_10m,relative_humidity_2m,precipitation',
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+ 'daily' => 'weather_code,temperature_2m_max,temperature_2m_min,precipitation_sum,wind_speed_10m_max',
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+ 'timezone' => 'Australia/Adelaide',
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+ 'past_days' => 7,
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+ 'forecast_days' => 7,
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+ 'wind_speed_unit' => 'kmh',
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+]);
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+
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+$ch = curl_init($meteoUrl);
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+curl_setopt_array($ch, [
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+ CURLOPT_RETURNTRANSFER => true,
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+ CURLOPT_TIMEOUT => 8,
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+]);
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+$meteoResp = curl_exec($ch);
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+$meteoCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
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+curl_close($ch);
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+
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+if (!$meteoResp || $meteoCode !== 200) {
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+ http_response_code(502);
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+ echo json_encode(['error' => 'Could not fetch weather data from Open-Meteo']);
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+ exit;
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+}
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+
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+$meteo = json_decode($meteoResp, true);
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+
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+// ── WMO weather code → description + icon name ────────────────────────────────
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+// Icon names match Skycons library used in dashboard
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+function wmoToCondition(int $code): array
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+{
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+ $map = [
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+ 0 => ['Clear', 'clear-day'],
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+ 1 => ['Mostly Clear', 'clear-day'],
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+ 2 => ['Partly Cloudy', 'partly-cloudy-day'],
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+ 3 => ['Overcast', 'cloudy'],
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+ 45 => ['Fog', 'fog'],
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+ 48 => ['Icy Fog', 'fog'],
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+ 51 => ['Light Drizzle', 'rain'],
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+ 53 => ['Drizzle', 'rain'],
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+ 55 => ['Heavy Drizzle', 'rain'],
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+ 61 => ['Light Rain', 'rain'],
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+ 63 => ['Rain', 'rain'],
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+ 65 => ['Heavy Rain', 'rain'],
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+ 71 => ['Light Snow', 'snow'],
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+ 73 => ['Snow', 'snow'],
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+ 75 => ['Heavy Snow', 'snow'],
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+ 77 => ['Snow Grains', 'sleet'],
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+ 80 => ['Light Showers', 'showers-day'],
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+ 81 => ['Showers', 'showers-day'],
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+ 82 => ['Heavy Showers', 'showers-day'],
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+ 85 => ['Snow Showers', 'snow'],
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+ 86 => ['Heavy Snow Showers', 'snow'],
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+ 95 => ['Thunderstorm', 'thunderstorm'],
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+ 96 => ['Hail Storm', 'hail'],
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+ 99 => ['Heavy Hail Storm', 'hail'],
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+ ];
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+ return $map[$code] ?? ['Unknown', 'cloudy'];
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+}
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+
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+// ── Build response ────────────────────────────────────────────────────────────
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+$current = $meteo['current'] ?? [];
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+$daily = $meteo['daily'] ?? [];
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+
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+[$curLabel, $curIcon] = wmoToCondition((int)($current['weather_code'] ?? 0));
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+
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+$days = [];
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+$today = date('Y-m-d');
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+foreach (($daily['time'] ?? []) as $i => $date) {
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+ [$label, $icon] = wmoToCondition((int)($daily['weather_code'][$i] ?? 0));
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+ $days[] = [
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+ 'date' => $date,
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+ 'is_past' => $date < $today,
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+ 'is_today' => $date === $today,
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+ 'label' => $label,
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+ 'icon' => $icon,
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+ 'temp_max' => round($daily['temperature_2m_max'][$i] ?? 0, 1),
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+ 'temp_min' => round($daily['temperature_2m_min'][$i] ?? 0, 1),
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+ 'rain' => round($daily['precipitation_sum'][$i] ?? 0, 1),
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+ 'wind_max' => round($daily['wind_speed_10m_max'][$i] ?? 0, 0),
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+ 'day_name' => date('D', strtotime($date)),
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+ 'day_short' => date('j M', strtotime($date)),
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+ ];
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+}
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+
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+$result = json_encode([
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+ 'location' => $locationLabel,
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+ 'lat' => $lat,
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+ 'lng' => $lng,
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+ 'current' => [
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+ 'temp' => round($current['temperature_2m'] ?? 0, 1),
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+ 'feels_like' => round($current['apparent_temperature'] ?? 0, 1),
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+ 'humidity' => round($current['relative_humidity_2m'] ?? 0, 0),
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+ 'wind' => round($current['wind_speed_10m'] ?? 0, 0),
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+ 'rain' => round($current['precipitation'] ?? 0, 1),
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+ 'label' => $curLabel,
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+ 'icon' => $curIcon,
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+ ],
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+ 'days' => $days,
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+]);
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+
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+// Cache in session
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+$_SESSION[$cacheKey] = $result;
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+$_SESSION[$cacheKey . '_ts'] = time();
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+
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+echo $result;
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