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/**
* Phase 4: The Backhaul (Step 12)
* GET /api/backhaul/opportunities
* For drivers on a return journey, show marketplace loads near their path
*/
exports.getOpportunities = async (req, res) => {
try {
const { truckId } = req.query;
const userId = req.user.id;
// If truckId is provided, use it; otherwise find opportunities for the driver
let opportunities;
if (truckId) {
// 1. Fetch Truck and its sourceHub
const truck = await prisma.truck.findUnique({
where: { id: truckId },
include: { sourceHub: true }
});
if (!truck || !truck.currentLat || !truck.currentLng) {
return res.status(404).json({ success: false, message: 'Truck or location not found' });
}
// 2. Find Shipments that are marketplace loads and near the current position
const nearbyShipments = await prisma.$queryRaw`
SELECT id, "pickupLocation", "pickupLat", "pickupLng", "dropLocation", "dropLat", "dropLng", "cargoType", "cargoWeight", "cargoVolume",
( 6371 * acos( cos( radians(${truck.currentLat}) ) * cos( radians( "pickupLat" ) )
* cos( radians( "pickupLng" ) - radians(${truck.currentLng}) ) + sin( radians(${truck.currentLat}) )
* sin( radians( "pickupLat" ) ) ) ) AS distance
FROM "Shipment"
WHERE "isMarketplaceLoad" = true
AND status = 'PENDING'
AND (6371 * acos( cos( radians(${truck.currentLat}) ) * cos( radians( "pickupLat" ) )
* cos( radians( "pickupLng" ) - radians(${truck.currentLng}) ) + sin( radians(${truck.currentLat}) )
* sin( radians( "pickupLat" ) ) )) < 20
ORDER BY distance;
`;
opportunities = nearbyShipments;
} else {
// Fetch backhaul pickups assigned to this driver
opportunities = await prisma.backhaulPickup.findMany({
where: { driverId: userId },
include: {
destinationHub: true,
truck: true,
},
orderBy: { proposedAt: 'desc' },
});
}
res.status(200).json({
success: true,
data: opportunities
});
} catch (error) {
console.error('Backhaul Error:', error);
res.status(500).json({ success: false, message: 'Internal server error' });
}
};
/**
* POST /api/backhaul/:id/accept - Driver accepts backhaul opportunity
*/
exports.acceptBackhaul = async (req, res) => {
try {
const { id } = req.params;
const userId = req.user.id;
const io = req.app.get('io');
const backhaul = await prisma.backhaulPickup.findUnique({
where: { id },
include: { driver: true, truck: true },
});
if (!backhaul) {
return res.status(404).json({ success: false, message: 'Backhaul not found' });
}
if (backhaul.driverId !== userId) {
return res.status(403).json({ success: false, message: 'Not authorized' });
}
if (backhaul.status !== 'PROPOSED') {
return res.status(400).json({ success: false, message: 'Cannot accept this backhaul' });
}
const updated = await prisma.backhaulPickup.update({
where: { id },
data: { status: 'ACCEPTED' },
});
// Notify dispatcher
io.emit('BACKHAUL_ACCEPTED', {
backhaulId: id,
driverName: backhaul.driver.name,
truckId: backhaul.truckId,
shipperName: backhaul.shipperName,
timestamp: new Date().toISOString(),
});
res.status(200).json({
success: true,
message: 'Backhaul accepted',
data: updated,
});
} catch (error) {
console.error('Accept backhaul error:', error);
res.status(500).json({ success: false, message: 'Failed to accept backhaul' });
}
};
/**
* POST /api/backhaul/:id/reject - Driver rejects backhaul opportunity
*/
exports.rejectBackhaul = async (req, res) => {
try {
const { id } = req.params;
const { reason } = req.body;
const userId = req.user.id;
const io = req.app.get('io');
const backhaul = await prisma.backhaulPickup.findUnique({
where: { id },
include: { driver: true },
});
if (!backhaul) {
return res.status(404).json({ success: false, message: 'Backhaul not found' });
}
if (backhaul.driverId !== userId) {
return res.status(403).json({ success: false, message: 'Not authorized' });
}
const updated = await prisma.backhaulPickup.update({
where: { id },
data: { status: 'REJECTED' },
});
// Notify dispatcher
io.emit('BACKHAUL_REJECTED', {
backhaulId: id,
driverName: backhaul.driver.name,
reason: reason || 'No reason provided',
timestamp: new Date().toISOString(),
});
res.status(200).json({
success: true,
message: 'Backhaul rejected',
data: updated,
});
} catch (error) {
console.error('Reject backhaul error:', error);
res.status(500).json({ success: false, message: 'Failed to reject backhaul' });
}
};
/**
* POST /api/backhaul/:id/start-pickup - Driver starts heading to pickup
*/
exports.startPickup = async (req, res) => {
try {
const { id } = req.params;
const userId = req.user.id;
const io = req.app.get('io');
const backhaul = await prisma.backhaulPickup.findUnique({
where: { id },
include: { driver: true },
});
if (!backhaul) {
return res.status(404).json({ success: false, message: 'Backhaul not found' });
}
if (backhaul.driverId !== userId) {
return res.status(403).json({ success: false, message: 'Not authorized' });
}
if (backhaul.status !== 'ACCEPTED') {
return res.status(400).json({ success: false, message: 'Cannot start pickup' });
}
const updated = await prisma.backhaulPickup.update({
where: { id },
data: { status: 'EN_ROUTE_TO_PICKUP' },
});
// Notify dispatcher
io.emit('BACKHAUL_EN_ROUTE', {
backhaulId: id,
driverName: backhaul.driver.name,
shipperLocation: backhaul.shipperLocation,
timestamp: new Date().toISOString(),
});
res.status(200).json({
success: true,
message: 'Started heading to pickup',
data: updated,
});
} catch (error) {
console.error('Start pickup error:', error);
res.status(500).json({ success: false, message: 'Failed to start pickup' });
}
};
/**
* POST /api/backhaul/:id/confirm-pickup - Driver confirms cargo pickup
*/
exports.confirmPickup = async (req, res) => {
try {
const { id } = req.params;
const { photos } = req.body;
const userId = req.user.id;
const io = req.app.get('io');
const backhaul = await prisma.backhaulPickup.findUnique({
where: { id },
include: { driver: true, truck: true },
});
if (!backhaul) {
return res.status(404).json({ success: false, message: 'Backhaul not found' });
}
if (backhaul.driverId !== userId) {
return res.status(403).json({ success: false, message: 'Not authorized' });
}
if (backhaul.status !== 'EN_ROUTE_TO_PICKUP') {
return res.status(400).json({ success: false, message: 'Cannot confirm pickup' });
}
const updated = await prisma.backhaulPickup.update({
where: { id },
data: {
status: 'PICKED_UP',
pickedUpAt: new Date(),
},
});
// Update truck capacity
await prisma.truck.update({
where: { id: backhaul.truckId },
data: {
currentWeight: { increment: backhaul.totalWeight },
currentVolume: { increment: backhaul.totalVolume },
},
});
// Notify dispatcher
io.emit('BACKHAUL_PICKED_UP', {
backhaulId: id,
driverName: backhaul.driver.name,
shipperName: backhaul.shipperName,
packageCount: backhaul.packageCount,
totalWeight: backhaul.totalWeight,
timestamp: new Date().toISOString(),
});
res.status(200).json({
success: true,
message: 'Pickup confirmed',
data: updated,
});
} catch (error) {
console.error('Confirm pickup error:', error);
res.status(500).json({ success: false, message: 'Failed to confirm pickup' });
}
};
/**
* POST /api/backhaul/:id/complete - Driver completes backhaul delivery
*/
exports.completeBackhaul = async (req, res) => {
try {
const { id } = req.params;
const { photos } = req.body;
const userId = req.user.id;
const io = req.app.get('io');
const backhaul = await prisma.backhaulPickup.findUnique({
where: { id },
include: { driver: true, truck: true, destinationHub: true },
});
if (!backhaul) {
return res.status(404).json({ success: false, message: 'Backhaul not found' });
}
if (backhaul.driverId !== userId) {
return res.status(403).json({ success: false, message: 'Not authorized' });
}
if (backhaul.status !== 'PICKED_UP') {
return res.status(400).json({ success: false, message: 'Cannot complete delivery' });
}
// Complete the backhaul and create transaction
const [updated, transaction] = await prisma.$transaction([
prisma.backhaulPickup.update({
where: { id },
data: {
status: 'DELIVERED',
deliveredAt: new Date(),
},
}),
prisma.transaction.create({
data: {
driverId: userId,
amount: 100, // Fixed backhaul bonus
type: 'BACKHAUL_BONUS',
description: `Backhaul delivery to ${backhaul.destinationHub?.name || 'Hub'}`,
route: `${backhaul.shipperLocation} → Hub`,
},
}),
]);
// Update truck capacity (remove cargo)
await prisma.truck.update({
where: { id: backhaul.truckId },
data: {
currentWeight: { decrement: backhaul.totalWeight },
currentVolume: { decrement: backhaul.totalVolume },
},
});
// Update driver earnings
await prisma.user.update({
where: { id: userId },
data: {
totalEarnings: { increment: 100 },
weeklyEarnings: { increment: 100 },
},
});
// Notify dispatcher - Backhaul completed!
io.emit('BACKHAUL_COMPLETED', {
backhaulId: id,
driverName: backhaul.driver.name,
shipperName: backhaul.shipperName,
destinationHub: backhaul.destinationHub?.name,
carbonSaved: backhaul.carbonSavedKg,
timestamp: new Date().toISOString(),
});
res.status(200).json({
success: true,
message: 'Backhaul delivery completed!',
data: {
backhaul: updated,
transaction,
},
});
} catch (error) {
console.error('Complete backhaul error:', error);
res.status(500).json({ success: false, message: 'Failed to complete backhaul' });
}
};
/**
* POST /api/backhaul/check-opportunities - Check for backhaul opportunities after delivery completion
* Called when a delivery is completed and truck is empty/heading back
*/
exports.checkOpportunities = async (req, res) => {
try {
const { truckId, currentLat, currentLng, destinationLat, destinationLng } = req.body;
const userId = req.user.id;
const io = req.app.get('io');
if (!truckId || !currentLat || !currentLng) {
return res.status(400).json({ success: false, message: 'Missing required fields' });
}
// Find the truck
const truck = await prisma.truck.findUnique({
where: { id: truckId },
include: { owner: true, sourceHub: true },
});
if (!truck) {
return res.status(404).json({ success: false, message: 'Truck not found' });
}
// Find marketplace shipments within geofence (20km) and along route to destination
const nearbyShipments = await prisma.$queryRaw`
SELECT id, "shipperId", "pickupLocation", "pickupLat", "pickupLng",
"dropLocation", "dropLat", "dropLng", "cargoType", "cargoWeight", "cargoVolume",
( 6371 * acos( cos( radians(${currentLat}) ) * cos( radians( "pickupLat" ) )
* cos( radians( "pickupLng" ) - radians(${currentLng}) ) + sin( radians(${currentLat}) )
* sin( radians( "pickupLat" ) ) ) ) AS distance
FROM "Shipment"
WHERE "isMarketplaceLoad" = true
AND status = 'PENDING'
AND (6371 * acos( cos( radians(${currentLat}) ) * cos( radians( "pickupLat" ) )
* cos( radians( "pickupLng" ) - radians(${currentLng}) ) + sin( radians(${currentLat}) )
* sin( radians( "pickupLat" ) ) )) < 20
ORDER BY distance
LIMIT 5;
`;
if (nearbyShipments.length === 0) {
return res.status(200).json({
success: true,
message: 'No backhaul opportunities found',
data: [],
});
}
// Create BackhaulPickup records and notify dispatcher
const backhaulRecords = [];
for (const shipment of nearbyShipments) {
// Get shipper info
const shipper = await prisma.user.findUnique({
where: { id: shipment.shipperId },
});
// Calculate carbon saved (rough estimate: 0.1 kg CO2 per km saved)
const carbonSaved = shipment.distance * 0.1;
// Create backhaul pickup record
const backhaul = await prisma.backhaulPickup.create({
data: {
truckId: truck.id,
driverId: userId,
shipperId: shipment.shipperId,
shipperName: shipper?.name || 'Unknown Shipper',
shipperPhone: shipper?.phone || '',
shipperLocation: shipment.pickupLocation || 'Unknown',
shipperLat: shipment.pickupLat,
shipperLng: shipment.pickupLng,
destinationHubId: truck.sourceHubId || truck.sourceHub?.id,
packageCount: 1,
totalWeight: shipment.cargoWeight || 0,
totalVolume: shipment.cargoVolume || 0,
distanceKm: shipment.distance,
carbonSavedKg: carbonSaved,
status: 'PROPOSED',
},
});
backhaulRecords.push(backhaul);
}
// Notify dispatcher about new backhaul opportunities
io.emit('BACKHAUL_OPPORTUNITIES_FOUND', {
truckId: truck.id,
driverName: truck.owner.name,
licensePlate: truck.licensePlate,
opportunityCount: backhaulRecords.length,
opportunities: backhaulRecords,
timestamp: new Date().toISOString(),
});
// Also notify the driver
io.to(`driver_${userId}`).emit('BACKHAUL_AVAILABLE', {
message: `${backhaulRecords.length} backhaul opportunities found!`,
opportunities: backhaulRecords,
});
res.status(200).json({
success: true,
message: `Found ${backhaulRecords.length} backhaul opportunities`,
data: backhaulRecords,
});
} catch (error) {
console.error('Check opportunities error:', error);
res.status(500).json({ success: false, message: 'Failed to check opportunities' });
}
}; |