Merge branch 'main' into feature-test

backend/internal/api/api.go

@@ -16,6 +16,7 @@ import (
 	"github.com/go-chi/cors"
 	"github.com/jackc/pgx/v5/pgxpool"
 
+	"github.com/forfarm/backend/internal/cache"
 	"github.com/forfarm/backend/internal/config"
 	"github.com/forfarm/backend/internal/domain"
 	m "github.com/forfarm/backend/internal/middlewares"
@@ -29,6 +30,7 @@ type api struct {
 	logger         *slog.Logger
 	httpClient     *http.Client
 	eventPublisher domain.EventPublisher
+	cache          cache.Cache
 
 	userRepo         domain.UserRepository
 	cropRepo         domain.CroplandRepository
@@ -54,17 +56,21 @@ func NewAPI(
 	pool *pgxpool.Pool,
 	eventPublisher domain.EventPublisher,
 	analyticsRepo domain.AnalyticsRepository,
-	inventoryRepo domain.InventoryRepository,
-	croplandRepo domain.CroplandRepository,
 	farmRepo domain.FarmRepository,
 ) *api {
 
 	client := &http.Client{}
 
+	logger.Info("creating memory cache")
+	memoryCache := cache.NewMemoryCache(1*time.Hour, 2*time.Hour)
+
 	userRepository := repository.NewPostgresUser(pool)
-	plantRepository := repository.NewPostgresPlant(pool)
+	plantRepository := repository.NewPostgresPlant(pool, memoryCache)
+	inventoryRepo := repository.NewPostgresInventory(pool, eventPublisher, memoryCache)
+	harvestRepository := repository.NewPostgresHarvest(pool, memoryCache)
 	knowledgeHubRepository := repository.NewPostgresKnowledgeHub(pool)
-	harvestRepository := repository.NewPostgresHarvest(pool)
+	croplandRepo := repository.NewPostgresCropland(pool)
+	croplandRepo.SetEventPublisher(eventPublisher)
 
 	owmFetcher := weather.NewOpenWeatherMapFetcher(config.OPENWEATHER_API_KEY, client, logger)
 	cacheTTL, err := time.ParseDuration(config.OPENWEATHER_CACHE_TTL)
@@ -88,6 +94,7 @@ func NewAPI(
 		logger:         logger,
 		httpClient:     client,
 		eventPublisher: eventPublisher,
+		cache:          memoryCache,
 
 		userRepo:         userRepository,
 		cropRepo:         croplandRepo,

backend/internal/cache/cache.go

@@ -0,0 +1,14 @@
+package cache
+
+import "time"
+
+type Cache interface {
+	Get(key string) (interface{}, bool)
+	Set(key string, value interface{}, ttl time.Duration)
+	Delete(key string)
+}
+
+const (
+	DefaultExpiration time.Duration = 0
+	NoExpiration      time.Duration = -1
+)

backend/internal/cache/memory_cache.go

@@ -0,0 +1,37 @@
+package cache
+
+import (
+	"time"
+
+	gocache "github.com/patrickmn/go-cache"
+)
+
+type memoryCache struct {
+	client *gocache.Cache
+}
+
+func NewMemoryCache(defaultExpiration, cleanupInterval time.Duration) Cache {
+	return &memoryCache{
+		client: gocache.New(defaultExpiration, cleanupInterval),
+	}
+}
+
+func (m *memoryCache) Get(key string) (interface{}, bool) {
+	return m.client.Get(key)
+}
+
+func (m *memoryCache) Set(key string, value interface{}, ttl time.Duration) {
+	var expiration time.Duration
+	if ttl == DefaultExpiration {
+		expiration = gocache.DefaultExpiration
+	} else if ttl == NoExpiration {
+		expiration = gocache.NoExpiration
+	} else {
+		expiration = ttl
+	}
+	m.client.Set(key, value, expiration)
+}
+
+func (m *memoryCache) Delete(key string) {
+	m.client.Delete(key)
+}

backend/internal/cmd/api.go

@@ -55,11 +55,6 @@ func APICmd(ctx context.Context) *cobra.Command {
 			farmRepo := repository.NewPostgresFarm(pool)
 			farmRepo.SetEventPublisher(eventBus)
 
-			inventoryRepo := repository.NewPostgresInventory(pool, eventBus)
-
-			croplandRepo := repository.NewPostgresCropland(pool)
-			croplandRepo.SetEventPublisher(eventBus)
-
 			projection := event.NewFarmAnalyticsProjection(eventBus, analyticsRepo, logger)
 			go func() {
 				if err := projection.Start(ctx); err != nil {
@@ -68,7 +63,7 @@ func APICmd(ctx context.Context) *cobra.Command {
 			}()
 			logger.Info("Farm Analytics Projection started")
 
-			apiInstance := api.NewAPI(ctx, logger, pool, eventBus, analyticsRepo, inventoryRepo, croplandRepo, farmRepo)
+			apiInstance := api.NewAPI(ctx, logger, pool, eventBus, analyticsRepo, farmRepo)
 
 			weatherFetcher := apiInstance.GetWeatherFetcher()
 			weatherInterval, err := time.ParseDuration(config.WEATHER_FETCH_INTERVAL)

backend/internal/repository/postgres_harvest.go

@@ -2,19 +2,34 @@ package repository
 
 import (
 	"context"
+	"log/slog"
 
+	"github.com/forfarm/backend/internal/cache"
 	"github.com/forfarm/backend/internal/domain"
 )
 
+const (
+	cacheKeyHarvestUnits = "harvest:units"
+)
+
 type postgresHarvestRepository struct {
-	conn Connection
+	conn  Connection
+	cache cache.Cache
 }
 
-func NewPostgresHarvest(conn Connection) domain.HarvestRepository {
+func NewPostgresHarvest(conn Connection, c cache.Cache) domain.HarvestRepository {
-	return &postgresHarvestRepository{conn: conn}
+	return &postgresHarvestRepository{conn: conn, cache: c}
 }
 
 func (p *postgresHarvestRepository) GetUnits(ctx context.Context) ([]domain.HarvestUnit, error) {
+	if cached, found := p.cache.Get(cacheKeyHarvestUnits); found {
+		if units, ok := cached.([]domain.HarvestUnit); ok {
+			slog.DebugContext(ctx, "Cache hit for GetHarvestUnits", "key", cacheKeyHarvestUnits)
+			return units, nil
+		}
+	}
+	slog.DebugContext(ctx, "Cache miss for GetHarvestUnits", "key", cacheKeyHarvestUnits)
+
 	query := `SELECT id, name FROM harvest_units ORDER BY id`
 	rows, err := p.conn.Query(ctx, query)
 	if err != nil {
@@ -30,5 +45,13 @@ func (p *postgresHarvestRepository) GetUnits(ctx context.Context) ([]domain.Harv
 		}
 		units = append(units, u)
 	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	if len(units) > 0 {
+		p.cache.Set(cacheKeyHarvestUnits, units, cacheTTLStatic)
+	}
+
 	return units, nil
 }

backend/internal/repository/postgres_inventory.go

@@ -3,20 +3,28 @@ package repository
 import (
 	"context"
 	"fmt"
+	"log/slog"
 	"strings"
 	"time"
 
+	"github.com/forfarm/backend/internal/cache"
 	"github.com/forfarm/backend/internal/domain"
 	"github.com/google/uuid"
 )
 
+const (
+	cacheKeyInventoryStatuses   = "inventory:statuses"
+	cacheKeyInventoryCategories = "inventory:categories"
+)
+
 type postgresInventoryRepository struct {
 	conn           Connection
 	eventPublisher domain.EventPublisher
+	cache          cache.Cache
 }
 
-func NewPostgresInventory(conn Connection, publisher domain.EventPublisher) domain.InventoryRepository {
+func NewPostgresInventory(conn Connection, publisher domain.EventPublisher, c cache.Cache) domain.InventoryRepository {
-	return &postgresInventoryRepository{conn: conn, eventPublisher: publisher}
+	return &postgresInventoryRepository{conn: conn, eventPublisher: publisher, cache: c}
 }
 
 func (p *postgresInventoryRepository) fetch(ctx context.Context, query string, args ...interface{}) ([]domain.InventoryItem, error) {
@@ -342,6 +350,14 @@ func (p *postgresInventoryRepository) Delete(ctx context.Context, id, userID str
 }
 
 func (p *postgresInventoryRepository) GetStatuses(ctx context.Context) ([]domain.InventoryStatus, error) {
+	if cached, found := p.cache.Get(cacheKeyInventoryStatuses); found {
+		if statuses, ok := cached.([]domain.InventoryStatus); ok {
+			slog.DebugContext(ctx, "Cache hit for GetInventoryStatuses", "key", cacheKeyInventoryStatuses)
+			return statuses, nil
+		}
+	}
+	slog.DebugContext(ctx, "Cache miss for GetInventoryStatuses", "key", cacheKeyInventoryStatuses)
+
 	query := `SELECT id, name FROM inventory_status ORDER BY id`
 	rows, err := p.conn.Query(ctx, query)
 	if err != nil {
@@ -357,10 +373,26 @@ func (p *postgresInventoryRepository) GetStatuses(ctx context.Context) ([]domain
 		}
 		statuses = append(statuses, s)
 	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	if len(statuses) > 0 {
+		p.cache.Set(cacheKeyInventoryStatuses, statuses, cacheTTLStatic)
+	}
+
 	return statuses, nil
 }
 
 func (p *postgresInventoryRepository) GetCategories(ctx context.Context) ([]domain.InventoryCategory, error) {
+	if cached, found := p.cache.Get(cacheKeyInventoryCategories); found {
+		if categories, ok := cached.([]domain.InventoryCategory); ok {
+			slog.DebugContext(ctx, "Cache hit for GetInventoryCategories", "key", cacheKeyInventoryCategories)
+			return categories, nil
+		}
+	}
+	slog.DebugContext(ctx, "Cache miss for GetInventoryCategories", "key", cacheKeyInventoryCategories)
+
 	query := `SELECT id, name FROM inventory_category ORDER BY id`
 	rows, err := p.conn.Query(ctx, query)
 	if err != nil {
@@ -376,5 +408,13 @@ func (p *postgresInventoryRepository) GetCategories(ctx context.Context) ([]doma
 		}
 		categories = append(categories, c)
 	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+
+	if len(categories) > 0 {
+		p.cache.Set(cacheKeyInventoryCategories, categories, cacheTTLStatic)
+	}
+
 	return categories, nil
 }

backend/internal/repository/postgres_plant.go

@@ -2,18 +2,28 @@ package repository
 
 import (
 	"context"
+	"log/slog"
 	"strings"
+	"time"
 
+	"github.com/forfarm/backend/internal/cache"
 	"github.com/forfarm/backend/internal/domain"
 	"github.com/google/uuid"
 )
 
+const (
+	cacheKeyPlantsAll   = "plants:all"
+	cacheKeyPlantPrefix = "plant:uuid:"
+	cacheTTLStatic      = 1 * time.Hour // Cache static lists for 1 hour
+)
+
 type postgresPlantRepository struct {
-	conn Connection
+	conn  Connection
+	cache cache.Cache
 }
 
-func NewPostgresPlant(conn Connection) domain.PlantRepository {
+func NewPostgresPlant(conn Connection, c cache.Cache) domain.PlantRepository {
-	return &postgresPlantRepository{conn: conn}
+	return &postgresPlantRepository{conn: conn, cache: c}
 }
 
 func (p *postgresPlantRepository) fetch(ctx context.Context, query string, args ...interface{}) ([]domain.Plant, error) {
@@ -43,12 +53,27 @@ func (p *postgresPlantRepository) fetch(ctx context.Context, query string, args
 }
 
 func (p *postgresPlantRepository) GetByUUID(ctx context.Context, uuid string) (domain.Plant, error) {
+	// Check cache first
+	cacheKey := cacheKeyPlantPrefix + uuid
+	if cached, found := p.cache.Get(cacheKey); found {
+		if plant, ok := cached.(domain.Plant); ok {
+			slog.DebugContext(ctx, "Cache hit for GetPlantByUUID", "key", cacheKey)
+			return plant, nil
+		}
+	}
+	slog.DebugContext(ctx, "Cache miss for GetPlantByUUID", "key", cacheKey)
+
 	query := `SELECT * FROM plants WHERE uuid = $1`
 	plants, err := p.fetch(ctx, query, uuid)
-	if err != nil || len(plants) == 0 {
+	if err != nil {
+		return domain.Plant{}, err
+	}
+	if len(plants) == 0 {
 		return domain.Plant{}, domain.ErrNotFound
 	}
-	return plants[0], nil
+	plant := plants[0]
+	p.cache.Set(cacheKey, plant, cacheTTLStatic)
+	return plant, nil
 }
 
 func (p *postgresPlantRepository) GetByName(ctx context.Context, name string) (domain.Plant, error) {
@@ -61,8 +86,25 @@ func (p *postgresPlantRepository) GetByName(ctx context.Context, name string) (d
 }
 
 func (p *postgresPlantRepository) GetAll(ctx context.Context) ([]domain.Plant, error) {
+	if cached, found := p.cache.Get(cacheKeyPlantsAll); found {
+		if plants, ok := cached.([]domain.Plant); ok {
+			slog.DebugContext(ctx, "Cache hit for GetAllPlants", "key", cacheKeyPlantsAll)
+			return plants, nil
+		}
+	}
+	slog.DebugContext(ctx, "Cache miss for GetAllPlants", "key", cacheKeyPlantsAll)
+
 	query := `SELECT * FROM plants`
-	return p.fetch(ctx, query)
+	plants, err := p.fetch(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+
+	if len(plants) > 0 {
+		p.cache.Set(cacheKeyPlantsAll, plants, cacheTTLStatic)
+	}
+
+	return plants, nil
 }
 
 func (p *postgresPlantRepository) Create(ctx context.Context, plant *domain.Plant) error {
@@ -74,7 +116,13 @@ func (p *postgresPlantRepository) Create(ctx context.Context, plant *domain.Plan
 	}
 	query := `INSERT INTO plants (uuid, name, light_profile_id, soil_condition_id, harvest_unit_id, created_at, updated_at)
 	VALUES ($1, $2, $3, $4, $5, NOW(), NOW()) RETURNING created_at, updated_at`
-	return p.conn.QueryRow(ctx, query, plant.UUID, plant.Name, plant.LightProfileID, plant.SoilConditionID, plant.HarvestUnitID).Scan(&plant.CreatedAt, &plant.UpdatedAt)
+	err := p.conn.QueryRow(ctx, query, plant.UUID, plant.Name, plant.LightProfileID, plant.SoilConditionID, plant.HarvestUnitID).Scan(&plant.CreatedAt, &plant.UpdatedAt)
+
+	if err == nil {
+		p.cache.Delete(cacheKeyPlantsAll)
+		slog.DebugContext(ctx, "Cache invalidated", "key", cacheKeyPlantsAll)
+	}
+	return err
 }
 
 func (p *postgresPlantRepository) Update(ctx context.Context, plant *domain.Plant) error {
@@ -84,11 +132,21 @@ func (p *postgresPlantRepository) Update(ctx context.Context, plant *domain.Plan
 	query := `UPDATE plants SET name = $2, light_profile_id = $3, soil_condition_id = $4,
 		harvest_unit_id = $5, updated_at = NOW() WHERE uuid = $1`
 	_, err := p.conn.Exec(ctx, query, plant.UUID, plant.Name, plant.LightProfileID, plant.SoilConditionID, plant.HarvestUnitID)
+	if err == nil {
+		p.cache.Delete(cacheKeyPlantsAll)
+		p.cache.Delete(cacheKeyPlantPrefix + plant.UUID)
+		slog.DebugContext(ctx, "Cache invalidated", "keys", []string{cacheKeyPlantsAll, cacheKeyPlantPrefix + plant.UUID})
+	}
 	return err
 }
 
 func (p *postgresPlantRepository) Delete(ctx context.Context, uuid string) error {
 	query := `DELETE FROM plants WHERE uuid = $1`
 	_, err := p.conn.Exec(ctx, query, uuid)
+	if err == nil {
+		p.cache.Delete(cacheKeyPlantsAll)
+		p.cache.Delete(cacheKeyPlantPrefix + uuid)
+		slog.DebugContext(ctx, "Cache invalidated", "keys", []string{cacheKeyPlantsAll, cacheKeyPlantPrefix + uuid})
+	}
 	return err
 }

frontend/api/hub.ts

@@ -1,148 +1,103 @@
 import axiosInstance from "./config";
+import type {
+  KnowledgeArticle as BackendArticle,
+  TableOfContent as BackendTOC,
+  RelatedArticle as BackendRelated,
+} from "@/types";
 import type { Blog } from "@/types";
 
-// Dummy blog data used as a fallback.
+function mapBackendArticleToFrontendBlog(
-const dummyBlogs: Blog[] = [
+  backendArticle: BackendArticle,
-  {
+  toc?: BackendTOC[],
-    id: 1,
+  related?: BackendRelated[]
-    title: "Sustainable Farming Practices for Modern Agriculture",
+): Blog {
-    description:
+  return {
-      "Learn about eco-friendly farming techniques that can increase yield while preserving the environment.",
+    id: backendArticle.UUID,
-    date: "2023-05-15",
+    title: backendArticle.Title,
-    author: "Emma Johnson",
+    description: backendArticle.Content.substring(0, 150) + "...",
-    topic: "Sustainability",
+    date: backendArticle.PublishDate.toString(),
-    image: "/placeholder.svg?height=400&width=600",
+    author: backendArticle.Author,
-    readTime: "5 min read",
+    topic: backendArticle.Categories.length > 0 ? backendArticle.Categories[0] : "General",
-    featured: true,
+    image: backendArticle.ImageURL || "/placeholder.svg",
-    content: `<p>Sustainable farming is not just a trend; it's a necessary evolution in agricultural practices. […]</p>`,
+    readTime: backendArticle.ReadTime || "5 min read",
-    tableOfContents: [
+    featured: backendArticle.Categories.includes("Featured"),
-      { id: "importance", title: "The Importance of Sustainable Agriculture", level: 1 },
+    content: backendArticle.Content,
-      { id: "crop-rotation", title: "Crop Rotation and Diversification", level: 1 },
+    tableOfContents: toc
-      { id: "ipm", title: "Integrated Pest Management (IPM)", level: 1 },
+      ? toc.map((item) => ({
-      { id: "water-conservation", title: "Water Conservation Techniques", level: 1 },
+          id: item.UUID,
-      { id: "soil-health", title: "Soil Health Management", level: 1 },
+          title: item.Title,
-      { id: "renewable-energy", title: "Renewable Energy Integration", level: 1 },
+          level: item.Level,
-      { id: "conclusion", title: "Conclusion", level: 1 },
+        }))
-    ],
+      : [],
-    relatedArticles: [
+    relatedArticles: related
-      {
+      ? related.map((item) => ({
-        id: 2,
+          id: item.UUID,
-        title: "Optimizing Fertilizer Usage for Maximum Crop Yield",
+          title: item.RelatedTitle,
-        topic: "Fertilizers",
+          topic: item.RelatedTag,
-        image: "/placeholder.svg?height=200&width=300",
+          image: "/placeholder.svg",
-        description: "",
+        }))
-        date: "",
+      : [],
-        author: "",
+  };
-        readTime: "",
+}
-        featured: false,
-      },
-      {
-        id: 4,
-        title: "Water Conservation Techniques for Drought-Prone Areas",
-        topic: "Sustainability",
-        image: "/placeholder.svg?height=200&width=300",
-        description: "",
-        date: "",
-        author: "",
-        readTime: "",
-        featured: false,
-      },
-      {
-        id: 5,
-        title: "Organic Pest Control Methods That Actually Work",
-        topic: "Organic",
-        image: "/placeholder.svg?height=200&width=300",
-        description: "",
-        date: "",
-        author: "",
-        readTime: "",
-        featured: false,
-      },
-    ],
-  },
-  {
-    id: 2,
-    title: "Optimizing Fertilizer Usage for Maximum Crop Yield",
-    description: "Discover the perfect balance of fertilizers to maximize your harvest without wasting resources.",
-    date: "2023-06-02",
-    author: "Michael Chen",
-    topic: "Fertilizers",
-    image: "/placeholder.svg?height=400&width=600",
-    readTime: "7 min read",
-    featured: false,
-  },
-  {
-    id: 3,
-    title: "Seasonal Planting Guide: What to Grow and When",
-    description:
-      "A comprehensive guide to help you plan your planting schedule throughout the year for optimal results.",
-    date: "2023-06-18",
-    author: "Sarah Williams",
-    topic: "Plantation",
-    image: "/placeholder.svg?height=400&width=600",
-    readTime: "8 min read",
-    featured: false,
-  },
-  {
-    id: 4,
-    title: "Water Conservation Techniques for Drought-Prone Areas",
-    description: "Essential strategies to maintain your crops during water shortages and drought conditions.",
-    date: "2023-07-05",
-    author: "David Rodriguez",
-    topic: "Sustainability",
-    image: "/placeholder.svg?height=400&width=600",
-    readTime: "6 min read",
-    featured: false,
-  },
-  {
-    id: 5,
-    title: "Organic Pest Control Methods That Actually Work",
-    description: "Natural and effective ways to keep pests at bay without resorting to harmful chemicals.",
-    date: "2023-07-22",
-    author: "Lisa Thompson",
-    topic: "Organic",
-    image: "/placeholder.svg?height=400&width=600",
-    readTime: "9 min read",
-    featured: false,
-  },
-  {
-    id: 6,
-    title: "The Future of Smart Farming: IoT and Agriculture",
-    description: "How Internet of Things technology is revolutionizing the way we monitor and manage farms.",
-    date: "2023-08-10",
-    author: "James Wilson",
-    topic: "Technology",
-    image: "/placeholder.svg?height=400&width=600",
-    readTime: "10 min read",
-    featured: true,
-  },
-];
 
-/**
- * Fetches a list of blog posts.
- * Simulates a network delay and returns dummy data when the API endpoint is unavailable.
- */
 export async function fetchBlogs(): Promise<Blog[]> {
-  await new Promise((resolve) => setTimeout(resolve, 1000));
   try {
-    const response = await axiosInstance.get<Blog[]>("/api/blogs");
+    interface BackendResponse {
-    return response.data;
+      articles: BackendArticle[];
+    }
+    const response = await axiosInstance.get<BackendResponse>("/knowledge-hub");
+
+    if (response.data && Array.isArray(response.data.articles)) {
+      return response.data.articles.map((article) => mapBackendArticleToFrontendBlog(article));
+    } else {
+      console.warn("Received unexpected data structure from /knowledge-hub:", response.data);
+      return [];
+    }
   } catch (error) {
-    return dummyBlogs;
+    console.error("Error fetching knowledge articles:", error);
+    // Return empty array to avoid breaking the UI completely
+    return [];
   }
 }
 
-/**
+export async function fetchBlogById(uuid: string): Promise<Blog | null> {
- * Fetches a single blog post by its id.
- * Returns the API result if available; otherwise falls back to dummy data.
- */
-export async function fetchBlogById(id: string): Promise<Blog | null> {
-  await new Promise((resolve) => setTimeout(resolve, 500));
   try {
-    const response = await axiosInstance.get<Blog>(`/api/blogs/${id}`);
+    interface BackendSingleResponse {
-    return response.data;
+      article: BackendArticle;
+    }
+    const articleResponse = await axiosInstance.get<BackendSingleResponse>(`/knowledge-hub/${uuid}`);
+
+    if (articleResponse.data && articleResponse.data.article) {
+      const article = articleResponse.data.article;
+
+      // --- Fetch TOC and Related separately ---
+      let tocItems: BackendTOC[] = [];
+      let relatedItems: BackendRelated[] = [];
+
+      try {
+        const tocResponse = await axiosInstance.get<{ table_of_contents: BackendTOC[] }>(`/knowledge-hub/${uuid}/toc`);
+        tocItems = tocResponse.data.table_of_contents || [];
+      } catch (tocError) {
+        console.warn(`Could not fetch TOC for article ${uuid}:`, tocError);
+      }
+
+      try {
+        const relatedResponse = await axiosInstance.get<{ related_articles: BackendRelated[] }>(
+          `/knowledge-hub/${uuid}/related`
+        );
+        relatedItems = relatedResponse.data.related_articles || [];
+      } catch (relatedError) {
+        console.warn(`Could not fetch related articles for ${uuid}:`, relatedError);
+      }
+      // --- End separate fetches ---
+
+      return mapBackendArticleToFrontendBlog(article, tocItems, relatedItems);
+    } else {
+      console.warn(`Received unexpected data structure from /knowledge-hub/${uuid}:`, articleResponse.data);
+      return null;
+    }
   } catch (error) {
-    const blog = dummyBlogs.find((blog) => blog.id === Number(id));
+    console.error(`Error fetching knowledge article by UUID ${uuid}:`, error);
-    return blog || null;
+    return null;
   }
 }

frontend/app/(sidebar)/hub/[id]/page.tsx

@@ -67,7 +67,7 @@ export default function BlogPage() {
       {/* Header */}
       <header className="border-b sticky top-0 z-10 bg-background/95 backdrop-blur">
         <div className="container flex items-center justify-between h-16 px-4">
-          <Link href="/knowledge-hub">
+          <Link href="/hub">
             <Button variant="ghost" size="sm" className="gap-1">
               <ArrowLeft className="h-4 w-4" /> Back to Knowledge Hub
             </Button>
@@ -162,7 +162,7 @@ export default function BlogPage() {
                   <CardContent>
                     <div className="space-y-4">
                       {blog.relatedArticles.map((article) => (
-                        <Link href={`/blog/${article.id}`} key={article.id}>
+                        <Link href={`/hub/${article.id}`} key={article.id}>
                           <div className="flex gap-3 group">
                             <div className="relative w-16 h-16 rounded overflow-hidden flex-shrink-0">
                               <Image

frontend/next.config.ts

@@ -5,6 +5,14 @@ const nextConfig: NextConfig = {
   devIndicators: {
     buildActivity: false,
   },
+  images: {
+    remotePatterns: [
+      {
+        protocol: "https",
+        hostname: "**",
+      },
+    ],
+  },
 };
 
 export default nextConfig;

frontend/types.ts

@@ -168,7 +168,7 @@ export type UpdateInventoryItemInput = Partial<CreateInventoryItemInput> & {
 };
 
 export interface Blog {
-  id: number;
+  id: string;
   title: string;
   description: string;
   date: string;
@@ -180,7 +180,7 @@ export interface Blog {
   content?: string;
   tableOfContents?: { id: string; title: string; level: number }[];
   relatedArticles?: {
-    id: number;
+    id: string;
     title: string;
     topic: string;
     image: string;
@@ -242,32 +242,54 @@ export interface SetOverlayAction {
 
 export type Action = ActionWithTypeOnly | SetOverlayAction;
 
-export function isCircle(
+export function isCircle(overlay: OverlayGeometry): overlay is google.maps.Circle {
-  overlay: OverlayGeometry
-): overlay is google.maps.Circle {
   return (overlay as google.maps.Circle).getCenter !== undefined;
 }
 
-export function isMarker(
+export function isMarker(overlay: OverlayGeometry): overlay is google.maps.Marker {
-  overlay: OverlayGeometry
-): overlay is google.maps.Marker {
   return (overlay as google.maps.Marker).getPosition !== undefined;
 }
 
-export function isPolygon(
+export function isPolygon(overlay: OverlayGeometry): overlay is google.maps.Polygon {
-  overlay: OverlayGeometry
-): overlay is google.maps.Polygon {
   return (overlay as google.maps.Polygon).getPath !== undefined;
 }
 
-export function isPolyline(
+export function isPolyline(overlay: OverlayGeometry): overlay is google.maps.Polyline {
-  overlay: OverlayGeometry
-): overlay is google.maps.Polyline {
   return (overlay as google.maps.Polyline).getPath !== undefined;
 }
 
-export function isRectangle(
+export function isRectangle(overlay: OverlayGeometry): overlay is google.maps.Rectangle {
-  overlay: OverlayGeometry
-): overlay is google.maps.Rectangle {
   return (overlay as google.maps.Rectangle).getBounds !== undefined;
 }
+
+export interface KnowledgeArticle {
+  UUID: string;
+  Title: string;
+  Content: string;
+  Author: string;
+  PublishDate: string;
+  ReadTime: string;
+  Categories: string[];
+  ImageURL: string;
+  CreatedAt: string;
+  UpdatedAt: string;
+}
+
+export interface TableOfContent {
+  UUID: string;
+  ArticleID: string;
+  Title: string;
+  Level: number;
+  Order: number;
+  CreatedAt: string;
+  UpdatedAt: string;
+}
+
+export interface RelatedArticle {
+  UUID: string;
+  ArticleID: string;
+  RelatedTitle: string;
+  RelatedTag: string;
+  CreatedAt: string;
+  UpdatedAt: string;
+}