linking stuff

backend/src/routes/applications.js

@@ -7,6 +7,37 @@ const { calculateApplication } = require('../utils/applicationCalculations');
 
 const router = express.Router();
 
+// Helper function to get spreader settings for equipment and product
+async function getSpreaderSettingsForEquipment(equipmentId, productId, userProductId, userId) {
+  // Get spreader settings for the specific product and equipment combination
+  let query, params;
+  
+  if (userProductId) {
+    query = `
+      SELECT pss.*, ue.custom_name as equipment_name, ue.manufacturer, ue.model as equipment_model
+      FROM product_spreader_settings pss
+      JOIN user_equipment ue ON pss.equipment_id = ue.id
+      WHERE pss.user_product_id = $1 AND pss.equipment_id = $2 AND ue.user_id = $3
+      ORDER BY pss.created_at DESC
+      LIMIT 1
+    `;
+    params = [userProductId, equipmentId, userId];
+  } else {
+    query = `
+      SELECT pss.*, ue.custom_name as equipment_name, ue.manufacturer, ue.model as equipment_model
+      FROM product_spreader_settings pss
+      JOIN user_equipment ue ON pss.equipment_id = ue.id
+      WHERE pss.product_id = $1 AND pss.equipment_id = $2 AND ue.user_id = $3
+      ORDER BY pss.created_at DESC
+      LIMIT 1
+    `;
+    params = [productId, equipmentId, userId];
+  }
+  
+  const result = await pool.query(query, params);
+  return result.rows[0] || null;
+}
+
 // @route   GET /api/applications/plans
 // @desc    Get all application plans for current user
 // @access  Private
@@ -902,4 +933,67 @@ router.get('/stats', async (req, res, next) => {
   }
 });
 
+// @route   GET /api/applications/spreader-settings/:equipmentId/:productId
+// @desc    Get recommended spreader settings for specific equipment and product combination
+// @access  Private
+router.get('/spreader-settings/:equipmentId/:productId', async (req, res, next) => {
+  try {
+    const { equipmentId, productId } = req.params;
+    const { isUserProduct } = req.query; // Indicates if productId refers to user_products table
+    
+    // Verify equipment belongs to user
+    const equipmentCheck = await pool.query(
+      'SELECT id, custom_name, manufacturer, model FROM user_equipment WHERE id = $1 AND user_id = $2',
+      [equipmentId, req.user.id]
+    );
+    
+    if (equipmentCheck.rows.length === 0) {
+      throw new AppError('Equipment not found', 404);
+    }
+    
+    const equipment = equipmentCheck.rows[0];
+    
+    // Get spreader settings
+    const spreaderSetting = await getSpreaderSettingsForEquipment(
+      parseInt(equipmentId),
+      isUserProduct === 'true' ? null : parseInt(productId),
+      isUserProduct === 'true' ? parseInt(productId) : null,
+      req.user.id
+    );
+    
+    if (!spreaderSetting) {
+      return res.json({
+        success: true,
+        data: {
+          hasSettings: false,
+          message: 'No spreader settings found for this equipment and product combination',
+          equipment: {
+            id: equipment.id,
+            name: equipment.custom_name || `${equipment.manufacturer} ${equipment.model}`.trim()
+          }
+        }
+      });
+    }
+    
+    res.json({
+      success: true,
+      data: {
+        hasSettings: true,
+        setting: {
+          id: spreaderSetting.id,
+          settingValue: spreaderSetting.setting_value,
+          rateDescription: spreaderSetting.rate_description,
+          notes: spreaderSetting.notes
+        },
+        equipment: {
+          id: equipment.id,
+          name: equipment.custom_name || `${equipment.manufacturer} ${equipment.model}`.trim()
+        }
+      }
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
 module.exports = router;