Update: 2026-07-06 00:53:15

backend/core/osrm_routing.php

@@ -0,0 +1,54 @@
+<?php
+// ============================================================
+// osrm_routing.php
+// Helper functions for OpenStreetMap Routing Machine (OSRM)
+// Used to estimate accurate distance (km) and duration (mins)
+// ============================================================
+
+/**
+ * Get Distance and Duration between two coordinates using public OSRM server.
+ * Note: If you host your own OSRM, replace the $osrmBaseUrl.
+ * 
+ * @param float $startLat
+ * @param float $startLng
+ * @param float $endLat
+ * @param float $endLng
+ * @return array|null Returns ['distance_km' => float, 'duration_min' => float] or null on failure.
+ */
+function getOsrmRouteDetails($startLat, $startLng, $endLat, $endLng) {
+    // Format: longitude,latitude
+    $coordinates = "{$startLng},{$startLat};{$endLng},{$endLat}";
+    
+    // Using public demo server. Note: Has rate limits.
+    // For production, highly recommended to use: "http://your-own-osrm-server.com:5000"
+    $osrmBaseUrl = "http://router.project-osrm.org";
+    $url = "{$osrmBaseUrl}/route/v1/driving/{$coordinates}?overview=false";
+
+    $ch = curl_init();
+    curl_setopt($ch, CURLOPT_URL, $url);
+    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+    curl_setopt($ch, CURLOPT_TIMEOUT, 5); // 5 seconds timeout
+    
+    // Add a User-Agent to avoid being blocked by the public demo server
+    curl_setopt($ch, CURLOPT_USERAGENT, "SiroRideHailingApp/1.0");
+
+    $response = curl_exec($ch);
+    $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
+    curl_close($ch);
+
+    if ($httpCode === 200 && $response) {
+        $data = json_decode($response, true);
+        if (isset($data['code']) && $data['code'] === 'Ok' && isset($data['routes'][0])) {
+            $route = $data['routes'][0];
+            $distanceMeters = isset($route['distance']) ? (float)$route['distance'] : 0;
+            $durationSeconds = isset($route['duration']) ? (float)$route['duration'] : 0;
+            
+            return [
+                'distance_km' => round($distanceMeters / 1000, 2),
+                'duration_min' => round($durationSeconds / 60, 2)
+            ];
+        }
+    }
+    
+    return null;
+}