refactor(events): Ensure consistent event publishing across repositories

backend/internal/repository/postgres_cropland.go

@@ -2,7 +2,10 @@ package repository
 
 import (
 	"context"
+	"encoding/json"
+	"fmt"
 	"strings"
+	"time"
 
 	"github.com/google/uuid"
 
@@ -11,33 +14,30 @@ import (
 
 type postgresCroplandRepository struct {
 	conn           Connection
+	eventPublisher domain.EventPublisher
 }
 
 func NewPostgresCropland(conn Connection) domain.CroplandRepository {
 	return &postgresCroplandRepository{conn: conn}
 }
 
+func (p *postgresCroplandRepository) SetEventPublisher(publisher domain.EventPublisher) {
+	p.eventPublisher = publisher
+}
+
 func (p *postgresCroplandRepository) fetch(ctx context.Context, query string, args ...interface{}) ([]domain.Cropland, error) {
 	rows, err := p.conn.Query(ctx, query, args...)
 	if err != nil {
 		return nil, err
 	}
 	defer rows.Close()
-
 	var croplands []domain.Cropland
 	for rows.Next() {
 		var c domain.Cropland
 		if err := rows.Scan(
-			&c.UUID,
+			&c.UUID, &c.Name, &c.Status, &c.Priority, &c.LandSize,
-			&c.Name,
+			&c.GrowthStage, &c.PlantID, &c.FarmID, &c.GeoFeature,
-			&c.Status,
+			&c.CreatedAt, &c.UpdatedAt,
-			&c.Priority,
-			&c.LandSize,
-			&c.GrowthStage,
-			&c.PlantID,
-			&c.FarmID,
-			&c.CreatedAt,
-			&c.UpdatedAt,
 		); err != nil {
 			return nil, err
 		}
@@ -46,9 +46,17 @@ func (p *postgresCroplandRepository) fetch(ctx context.Context, query string, ar
 	return croplands, nil
 }
 
+func (p *postgresCroplandRepository) GetAll(ctx context.Context) ([]domain.Cropland, error) {
+	query := `
+		SELECT uuid, name, status, priority, land_size, growth_stage, plant_id, farm_id, geo_feature, created_at, updated_at
+		FROM croplands`
+
+	return p.fetch(ctx, query)
+}
+
 func (p *postgresCroplandRepository) GetByID(ctx context.Context, uuid string) (domain.Cropland, error) {
 	query := `
-		SELECT uuid, name, status, priority, land_size, growth_stage, plant_id, farm_id, created_at, updated_at
+		SELECT uuid, name, status, priority, land_size, growth_stage, plant_id, farm_id, geo_feature, created_at, updated_at
 		FROM croplands
 		WHERE uuid = $1`
 
@@ -64,7 +72,7 @@ func (p *postgresCroplandRepository) GetByID(ctx context.Context, uuid string) (
 
 func (p *postgresCroplandRepository) GetByFarmID(ctx context.Context, farmID string) ([]domain.Cropland, error) {
 	query := `
-		SELECT uuid, name, status, priority, land_size, growth_stage, plant_id, farm_id, created_at, updated_at
+		SELECT uuid, name, status, priority, land_size, growth_stage, plant_id, farm_id, geo_feature, created_at, updated_at
 		FROM croplands
 		WHERE farm_id = $1`
 
@@ -72,47 +80,119 @@ func (p *postgresCroplandRepository) GetByFarmID(ctx context.Context, farmID str
 }
 
 func (p *postgresCroplandRepository) CreateOrUpdate(ctx context.Context, c *domain.Cropland) error {
+	isNew := false
 	if strings.TrimSpace(c.UUID) == "" {
-		c.UUID = uuid.New().String()
+		c.UUID = uuid.NewString()
+		isNew = true
+	}
+
+	if c.GeoFeature != nil && len(c.GeoFeature) == 0 {
+		c.GeoFeature = nil
 	}
 
 	query := `
-        INSERT INTO croplands (uuid, name, status, priority, land_size, growth_stage, plant_id, farm_id, created_at, updated_at)  
+	INSERT INTO croplands (
-        VALUES ($1, $2, $3, $4, $5, $6, $7, $8, NOW(), NOW())
+		uuid, name, status, priority, land_size, growth_stage,
+		plant_id, farm_id, geo_feature, created_at, updated_at
+	)
+	VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, NOW(), NOW())
 	ON CONFLICT (uuid) DO UPDATE
-        SET name = EXCLUDED.name,
+	SET name = EXCLUDED.name, status = EXCLUDED.status, priority = EXCLUDED.priority,
-            status = EXCLUDED.status,
+		land_size = EXCLUDED.land_size, growth_stage = EXCLUDED.growth_stage,
-            priority = EXCLUDED.priority,
+		plant_id = EXCLUDED.plant_id, farm_id = EXCLUDED.farm_id,
-            land_size = EXCLUDED.land_size,
+		geo_feature = EXCLUDED.geo_feature, updated_at = NOW()
-            growth_stage = EXCLUDED.growth_stage,
-            plant_id = EXCLUDED.plant_id,
-            farm_id = EXCLUDED.farm_id,
-            updated_at = NOW()
 	RETURNING uuid, created_at, updated_at`
 
-	return p.conn.QueryRow(
+	err := p.conn.QueryRow(
-		ctx,
+		ctx, query,
-		query,
+		c.UUID, c.Name, c.Status, c.Priority, c.LandSize, c.GrowthStage,
-		c.UUID,
+		c.PlantID, c.FarmID, c.GeoFeature,
-		c.Name,
+	).Scan(&c.UUID, &c.CreatedAt, &c.UpdatedAt)
-		c.Status,
+
-		c.Priority,
+	if err != nil {
-		c.LandSize,
+		return err
-		c.GrowthStage,
+	}
-		c.PlantID,
+
-		c.FarmID,
+	if p.eventPublisher != nil {
-	).Scan(&c.UUID, &c.CreatedAt, &c.UpdatedAt) // Fixed Scan call
+		eventType := "cropland.updated"
+		if isNew {
+			eventType = "cropland.created"
+		}
+
+		// Avoid sending raw json.RawMessage directly if possible
+		var geoFeatureMap interface{}
+		if c.GeoFeature != nil {
+			_ = json.Unmarshal(c.GeoFeature, &geoFeatureMap)
+		}
+
+		payload := map[string]interface{}{
+			"crop_id":      c.UUID,
+			"name":         c.Name,
+			"status":       c.Status,
+			"priority":     c.Priority,
+			"land_size":    c.LandSize,
+			"growth_stage": c.GrowthStage,
+			"plant_id":     c.PlantID,
+			"farm_id":      c.FarmID,
+			"geo_feature":  geoFeatureMap,
+			"created_at":   c.CreatedAt,
+			"updated_at":   c.UpdatedAt,
+			"event_type":   eventType,
+		}
+
+		event := domain.Event{
+			ID:          uuid.NewString(),
+			Type:        eventType,
+			Source:      "cropland-repository",
+			Timestamp:   time.Now().UTC(),
+			AggregateID: c.UUID,
+			Payload:     payload,
+		}
+		go func() {
+			bgCtx := context.Background()
+			if errPub := p.eventPublisher.Publish(bgCtx, event); errPub != nil {
+				fmt.Printf("Error publishing %s event: %v\n", eventType, errPub) // Replace with proper logging
+			}
+		}()
+	}
+
+	return nil
 }
+
 func (p *postgresCroplandRepository) Delete(ctx context.Context, uuid string) error {
+	// Optional: Fetch details before deleting if needed for event payload
+	// cropland, err := p.GetByID(ctx, uuid) // Might fail if already deleted, handle carefully
+	// if err != nil && !errors.Is(err, domain.ErrNotFound){ return err } // Return actual errors
+
 	query := `DELETE FROM croplands WHERE uuid = $1`
 	_, err := p.conn.Exec(ctx, query, uuid)
+	if err != nil {
 		return err
-}
+	}
 
-func (p *postgresCroplandRepository) GetAll(ctx context.Context) ([]domain.Cropland, error) {
+	if p.eventPublisher != nil {
-	query := `
+		eventType := "cropland.deleted"
-		SELECT uuid, name, status, priority, land_size, growth_stage, plant_id, farm_id, created_at, updated_at
+		payload := map[string]interface{}{
-		FROM croplands`
+			"crop_id": uuid,
+			// Include farm_id if easily available or fetched before delete
+			// "farm_id": cropland.FarmID
+			"event_type": eventType,
+		}
+		event := domain.Event{
+			ID:          uuid,
+			Type:        eventType,
+			Source:      "cropland-repository",
+			Timestamp:   time.Now().UTC(),
+			AggregateID: uuid,
+			Payload:     payload,
+		}
+		go func() {
+			bgCtx := context.Background()
+			if errPub := p.eventPublisher.Publish(bgCtx, event); errPub != nil {
+				fmt.Printf("Error publishing %s event: %v\n", eventType, errPub)
+			}
+		}()
+	}
 
-	return p.fetch(ctx, query)
+	return nil
 }

backend/internal/repository/postgres_inventory.go

@@ -7,14 +7,16 @@ import (
 	"time"
 
 	"github.com/forfarm/backend/internal/domain"
+	"github.com/google/uuid"
 )
 
 type postgresInventoryRepository struct {
 	conn           Connection
+	eventPublisher domain.EventPublisher
 }
 
-func NewPostgresInventory(conn Connection) domain.InventoryRepository {
+func NewPostgresInventory(conn Connection, publisher domain.EventPublisher) domain.InventoryRepository {
-	return &postgresInventoryRepository{conn: conn}
+	return &postgresInventoryRepository{conn: conn, eventPublisher: publisher}
 }
 
 func (p *postgresInventoryRepository) fetch(ctx context.Context, query string, args ...interface{}) ([]domain.InventoryItem, error) {
@@ -219,60 +221,124 @@ func (p *postgresInventoryRepository) GetAll(ctx context.Context) ([]domain.Inve
 func (p *postgresInventoryRepository) CreateOrUpdate(ctx context.Context, item *domain.InventoryItem) error {
 	now := time.Now()
 	item.UpdatedAt = now
+	isNew := false
 
 	if item.ID == "" {
+		isNew = true
 		item.CreatedAt = now
 		query := `
 			INSERT INTO inventory_items
 			(id, user_id, name, category_id, quantity, unit_id, date_added, status_id, created_at, updated_at)
 			VALUES (gen_random_uuid(), $1, $2, $3, $4, $5, $6, $7, $8, $9)
 			RETURNING id`
-		return p.conn.QueryRow(
+		err := p.conn.QueryRow(
 			ctx,
 			query,
-			item.UserID,
+			item.UserID, item.Name, item.CategoryID, item.Quantity,
-			item.Name,
+			item.UnitID, item.DateAdded, item.StatusID, item.CreatedAt, item.UpdatedAt,
-			item.CategoryID,
-			item.Quantity,
-			item.UnitID,
-			item.DateAdded,
-			item.StatusID,
-			item.CreatedAt,
-			item.UpdatedAt,
 		).Scan(&item.ID)
+		if err != nil {
+			// Log error
+			return err
 		}
-
+	} else {
 		query := `
 			UPDATE inventory_items
-		SET name = $1,
+			SET name = $1, category_id = $2, quantity = $3, unit_id = $4,
-			category_id = $2,
+			    date_added = $5, status_id = $6, updated_at = $7
-			quantity = $3,
-			unit_id = $4,
-			date_added = $5,
-			status_id = $6,
-			updated_at = $7
 			WHERE id = $8 AND user_id = $9
-		RETURNING id`
+			RETURNING id` // Ensure RETURNING id exists or handle differently
-
+		err := p.conn.QueryRow(
-	return p.conn.QueryRow(
 			ctx,
 			query,
-		item.Name,
+			item.Name, item.CategoryID, item.Quantity, item.UnitID,
-		item.CategoryID,
+			item.DateAdded, item.StatusID, item.UpdatedAt, item.ID, item.UserID,
-		item.Quantity,
+		).Scan(&item.ID) // Scan to confirm update happened or handle potential ErrNoRows
-		item.UnitID,
+		if err != nil {
-		item.DateAdded,
+			// Log error
-		item.StatusID,
+			return err
-		item.UpdatedAt,
+		}
-		item.ID,
+	}
-		item.UserID,
+
-	).Scan(&item.ID)
+	// --- Publish Event ---
+	if p.eventPublisher != nil {
+		eventType := "inventory.item.updated"
+		if isNew {
+			eventType = "inventory.item.created"
+		}
+
+		payload := map[string]interface{}{
+			"item_id":     item.ID,
+			"user_id":     item.UserID, // Include user ID for potential farm lookup in projection
+			"name":        item.Name,
+			"category_id": item.CategoryID,
+			"quantity":    item.Quantity,
+			"unit_id":     item.UnitID,
+			"status_id":   item.StatusID,
+			"date_added":  item.DateAdded,
+			"updated_at":  item.UpdatedAt,
+			// NO farm_id easily available here without extra lookup
+		}
+
+		event := domain.Event{
+			ID:          uuid.NewString(),
+			Type:        eventType,
+			Source:      "inventory-repository",
+			Timestamp:   time.Now().UTC(),
+			AggregateID: item.UserID, // Use UserID as AggregateID for inventory? Or item.ID? Let's use item.ID.
+			Payload:     payload,
+		}
+		// Use AggregateID = item.ID for consistency if item is the aggregate root
+		event.AggregateID = item.ID
+
+		go func() {
+			bgCtx := context.Background()
+			if errPub := p.eventPublisher.Publish(bgCtx, event); errPub != nil {
+				fmt.Printf("Error publishing %s event: %v\n", eventType, errPub) // Use proper logging
+			}
+		}()
+	}
+	// --- End Publish Event ---
+
+	return nil
 }
 
 func (p *postgresInventoryRepository) Delete(ctx context.Context, id, userID string) error {
 	query := `DELETE FROM inventory_items WHERE id = $1 AND user_id = $2`
-	_, err := p.conn.Exec(ctx, query, id, userID)
+	cmdTag, err := p.conn.Exec(ctx, query, id, userID)
+	if err != nil {
+		// Log error
 		return err
+	}
+	if cmdTag.RowsAffected() == 0 {
+		return domain.ErrNotFound // Or a permission error if user doesn't match
+	}
+
+	// --- Publish Event ---
+	if p.eventPublisher != nil {
+		eventType := "inventory.item.deleted"
+		payload := map[string]interface{}{
+			"item_id": id,
+			"user_id": userID, // Include user ID
+		}
+		event := domain.Event{
+			ID:          uuid.NewString(),
+			Type:        eventType,
+			Source:      "inventory-repository",
+			Timestamp:   time.Now().UTC(),
+			AggregateID: id, // Use item ID as aggregate ID
+			Payload:     payload,
+		}
+		go func() {
+			bgCtx := context.Background()
+			if errPub := p.eventPublisher.Publish(bgCtx, event); errPub != nil {
+				fmt.Printf("Error publishing %s event: %v\n", eventType, errPub) // Use proper logging
+			}
+		}()
+	}
+	// --- End Publish Event ---
+
+	return nil
 }
 
 func (p *postgresInventoryRepository) GetStatuses(ctx context.Context) ([]domain.InventoryStatus, error) {