feat: use react query to fetch farm

frontend/api/farm.ts

@@ -1,13 +1,17 @@
+import axiosInstance from "./config";
 import type { Crop, CropAnalytics, Farm } from "@/types";
 
 /**
- * Fetch mock crop data by id.
+ * Fetch a specific crop by id using axios.
- * @param id - The crop identifier.
+ * Falls back to dummy data on error.
- * @returns A promise that resolves to a Crop object.
  */
 export async function fetchCropById(id: string): Promise<Crop> {
-  // Simulate an API delay if needed.
+  try {
-  return Promise.resolve({
+    const response = await axiosInstance.get<Crop>(`/api/crops/${id}`);
+    return response.data;
+  } catch (error) {
+    // Fallback dummy data
+    return {
       id,
       farmId: "1",
       name: "Monthong Durian",
@@ -17,16 +21,20 @@ export async function fetchCropById(id: string): Promise<Crop> {
       expectedHarvest: new Date("2024-07-15"),
       area: "2.5 hectares",
       healthScore: 85,
-  });
+    };
+  }
 }
 
 /**
- * Fetch mock crop analytics data by crop id.
+ * Fetch crop analytics by crop id using axios.
- * @param id - The crop identifier.
+ * Returns dummy analytics if the API call fails.
- * @returns A promise that resolves to a CropAnalytics object.
  */
 export async function fetchAnalyticsByCropId(id: string): Promise<CropAnalytics> {
-  return Promise.resolve({
+  try {
+    const response = await axiosInstance.get<CropAnalytics>(`/api/crops/${id}/analytics`);
+    return response.data;
+  } catch (error) {
+    return {
       cropId: id,
       growthProgress: 45,
       humidity: 75,
@@ -44,24 +52,23 @@ export async function fetchAnalyticsByCropId(id: string): Promise<CropAnalytics>
         phosphorus: 65,
         potassium: 75,
       },
-  });
+    };
+  }
 }
 
 /**
- * Simulates an API call to fetch farms.
+ * Fetch an array of farms using axios.
- * Introduces a delay and a random error to emulate network conditions.
+ * Simulates a delay and a random error; returns dummy data if the API is unavailable.
- *
- * @returns A promise that resolves to an array of Farm objects.
  */
 export async function fetchFarms(): Promise<Farm[]> {
   // Simulate network delay
   await new Promise((resolve) => setTimeout(resolve, 1000));
 
-  // Simulate a random error (roughly 1 in 10 chance)
+  try {
-  if (Math.random() < 0.1) {
+    const response = await axiosInstance.get<Farm[]>("/api/farms");
-    throw new Error("Failed to fetch farms. Please try again later.");
+    return response.data;
-  }
+  } catch (error) {
-
+    // Optionally, you could simulate a random error here. For now we return fallback data.
     return [
       {
         id: "1",
@@ -92,25 +99,43 @@ export async function fetchFarms(): Promise<Farm[]> {
       },
     ];
   }
+}
 
 /**
- * Simulates an API call to fetch farm details along with its crops.
+ * Simulates creating a new farm.
- * This function adds a delay and randomly generates an error to mimic real-world conditions.
+ * Waits for 800ms and then uses dummy data.
- *
+ */
- * @param farmId - The unique identifier of the farm to retrieve.
+export async function createFarm(data: Partial<Farm>): Promise<Farm> {
- * @returns A promise resolving with an object that contains the farm details and an array of crops.
+  await new Promise((resolve) => setTimeout(resolve, 800));
- * @throws An error if the simulated network call fails or if the farm is not found.
+  // In a real implementation you might call:
+  // const response = await axiosInstance.post<Farm>("/api/farms", data);
+  // return response.data;
+  return {
+    id: Math.random().toString(36).substr(2, 9),
+    name: data.name!,
+    location: data.location!,
+    type: data.type!,
+    createdAt: new Date(),
+    area: data.area || "0 hectares",
+    crops: 0,
+  };
+}
+
+// Additional functions for fetching crop details remain unchanged...
+
+/**
+ * Fetch detailed information for a specific farm (including its crops) using axios.
+ * If the API call fails, returns fallback dummy data.
  */
 export async function fetchFarmDetails(farmId: string): Promise<{ farm: Farm; crops: Crop[] }> {
   // Simulate network delay
   await new Promise((resolve) => setTimeout(resolve, 1200));
 
-  // Randomly simulate an error (about 1 in 10 chance)
+  try {
-  if (Math.random() < 0.1) {
+    const response = await axiosInstance.get<{ farm: Farm; crops: Crop[] }>(`/api/farms/${farmId}`);
-    throw new Error("Failed to fetch farm details. Please try again later.");
+    return response.data;
-  }
+  } catch (error) {
-
+    // If the given farmId is "999", simulate a not found error.
-  // Simulate a not found error if the given farmId is "999"
     if (farmId === "999") {
       throw new Error("FARM_NOT_FOUND");
     }
@@ -123,6 +148,7 @@ export async function fetchFarmDetails(farmId: string): Promise<{ farm: Farm; cr
       createdAt: new Date("2023-01-15"),
       area: "12.5 hectares",
       crops: 3,
+      // Additional details such as weather can be included if needed.
       weather: {
         temperature: 28,
         humidity: 75,
@@ -169,3 +195,4 @@ export async function fetchFarmDetails(farmId: string): Promise<{ farm: Farm; cr
 
     return { farm, crops };
   }
+}

frontend/app/(sidebar)/farms/add-farm-form.tsx

@@ -18,7 +18,7 @@ const farmFormSchema = z.object({
   area: z.string().optional(),
 });
 
-interface AddFarmFormProps {
+export interface AddFarmFormProps {
   onSubmit: (data: Partial<Farm>) => Promise<void>;
   onCancel: () => void;
 }

frontend/app/(sidebar)/farms/farm-card.tsx

@@ -63,7 +63,7 @@ export function FarmCard({ variant, farm, onClick }: FarmCardProps) {
               <Sprout className="h-5 w-5 text-green-600" />
             </div>
             <div>
-              <h3 className="text-xl font-medium mb-1">{farm.name}</h3>
+              <h3 className="text-xl font-medium mb-1 truncate">{farm.name}</h3>
               <div className="flex items-center text-sm text-muted-foreground mb-2">
                 <MapPin className="h-3.5 w-3.5 mr-1 flex-shrink-0" />
                 <span className="truncate">{farm.location}</span>

frontend/app/(sidebar)/farms/page.tsx

@@ -1,9 +1,10 @@
 "use client";
 
-import { useState, useEffect } from "react";
+import { useState } from "react";
 import { useRouter } from "next/navigation";
 import { motion, AnimatePresence } from "framer-motion";
 import { Search, Plus, Filter, SlidersHorizontal, Leaf, Calendar, AlertTriangle, Loader2 } from "lucide-react";
+import { useQuery, useMutation, useQueryClient } from "@tanstack/react-query";
 
 import { Dialog, DialogContent, DialogHeader, DialogTitle, DialogDescription } from "@/components/ui/dialog";
 import { Separator } from "@/components/ui/separator";
@@ -23,70 +24,37 @@ import { Alert, AlertDescription, AlertTitle } from "@/components/ui/alert";
 import { FarmCard } from "./farm-card";
 import { AddFarmForm } from "./add-farm-form";
 import type { Farm } from "@/types";
-import { fetchFarms } from "@/api/farm";
+import { fetchFarms, createFarm } from "@/api/farm";
 
-/**
- * FarmSetupPage component allows users to search, filter, sort, and add farms.
- */
 export default function FarmSetupPage() {
   const router = useRouter();
+  const queryClient = useQueryClient();
 
-  // Component state
-  const [isDialogOpen, setIsDialogOpen] = useState(false);
   const [searchQuery, setSearchQuery] = useState("");
-  const [farms, setFarms] = useState<Farm[]>([]);
-  const [isLoading, setIsLoading] = useState(true);
-  const [error, setError] = useState<string | null>(null);
   const [activeFilter, setActiveFilter] = useState<string>("all");
   const [sortOrder, setSortOrder] = useState<"newest" | "oldest" | "alphabetical">("newest");
+  const [isDialogOpen, setIsDialogOpen] = useState(false);
 
-  // Load farms when the component mounts.
+  const {
-  useEffect(() => {
+    data: farms,
-    async function loadFarms() {
+    isLoading,
-      try {
+    isError,
-        setIsLoading(true);
+    error,
-        setError(null);
+  } = useQuery<Farm[]>({
-        const data = await fetchFarms();
+    queryKey: ["farms"],
-        setFarms(data);
+    queryFn: fetchFarms,
-      } catch (err) {
+    staleTime: 60 * 1000,
-        setError(err instanceof Error ? err.message : "An unknown error occurred");
+  });
-      } finally {
-        setIsLoading(false);
-      }
-    }
 
-    loadFarms();
+  const mutation = useMutation({
-  }, []);
+    mutationFn: (data: Partial<Farm>) => createFarm(data),
-
+    onSuccess: () => {
-  /**
+      queryClient.invalidateQueries({ queryKey: ["farms"] });
-   * Handles adding a new farm.
-   *
-   * @param data - Partial Farm data from the form.
-   */
-  const handleAddFarm = async (data: Partial<Farm>) => {
-    try {
-      // Simulate an API call delay for adding a new farm.
-      await new Promise((resolve) => setTimeout(resolve, 800));
-
-      const newFarm: Farm = {
-        id: Math.random().toString(36).substr(2, 9),
-        name: data.name!,
-        location: data.location!,
-        type: data.type!,
-        createdAt: new Date(),
-        area: data.area || "0 hectares",
-        crops: 0,
-      };
-
-      setFarms((prev) => [newFarm, ...prev]);
       setIsDialogOpen(false);
-    } catch (err) {
+    },
-      setError("Failed to add farm. Please try again.");
+  });
-    }
-  };
 
-  // Filter and sort farms based on the current state.
+  const filteredAndSortedFarms = (farms || [])
-  const filteredAndSortedFarms = farms
     .filter(
       (farm) =>
         (activeFilter === "all" || farm.type === activeFilter) &&
@@ -96,16 +64,20 @@ export default function FarmSetupPage() {
     )
     .sort((a, b) => {
       if (sortOrder === "newest") {
-        return b.createdAt.getTime() - a.createdAt.getTime();
+        return new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime();
       } else if (sortOrder === "oldest") {
-        return a.createdAt.getTime() - b.createdAt.getTime();
+        return new Date(a.createdAt).getTime() - new Date(b.createdAt).getTime();
       } else {
         return a.name.localeCompare(b.name);
       }
     });
 
-  // Get available farm types for filters.
+  // Get distinct farm types.
-  const farmTypes = ["all", ...new Set(farms.map((farm) => farm.type))];
+  const farmTypes = ["all", ...new Set((farms || []).map((farm) => farm.type))];
+
+  const handleAddFarm = async (data: Partial<Farm>) => {
+    await mutation.mutateAsync(data);
+  };
 
   return (
     <div className="min-h-screen bg-gradient-to-b">
@@ -187,11 +159,11 @@ export default function FarmSetupPage() {
           <Separator className="my-2" />
 
           {/* Error state */}
-          {error && (
+          {isError && (
             <Alert variant="destructive">
               <AlertTriangle className="h-4 w-4" />
               <AlertTitle>Error</AlertTitle>
-              <AlertDescription>{error}</AlertDescription>
+              <AlertDescription>{(error as Error)?.message}</AlertDescription>
             </Alert>
           )}
 
@@ -204,7 +176,7 @@ export default function FarmSetupPage() {
           )}
 
           {/* Empty state */}
-          {!isLoading && !error && filteredAndSortedFarms.length === 0 && (
+          {!isLoading && !isError && filteredAndSortedFarms.length === 0 && (
             <div className="flex flex-col items-center justify-center py-12 bg-muted/20 rounded-lg border border-dashed">
               <div className="bg-green-100 p-3 rounded-full mb-4">
                 <Leaf className="h-6 w-6 text-green-600" />
@@ -223,7 +195,7 @@ export default function FarmSetupPage() {
                 onClick={() => {
                   setSearchQuery("");
                   setActiveFilter("all");
-                  if (!farms.length) {
+                  if (!farms || farms.length === 0) {
                     setIsDialogOpen(true);
                   }
                 }}
@@ -241,7 +213,7 @@ export default function FarmSetupPage() {
           )}
 
           {/* Grid of farm cards */}
-          {!isLoading && !error && filteredAndSortedFarms.length > 0 && (
+          {!isLoading && !isError && filteredAndSortedFarms.length > 0 && (
             <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
               <AnimatePresence>
                 <motion.div
@@ -252,7 +224,6 @@ export default function FarmSetupPage() {
                   className="col-span-1">
                   <FarmCard variant="add" onClick={() => setIsDialogOpen(true)} />
                 </motion.div>
-
                 {filteredAndSortedFarms.map((farm, index) => (
                   <motion.div
                     key={farm.id}
@@ -285,9 +256,7 @@ export default function FarmSetupPage() {
 }
 
 /**
- * A helper component to render the Check icon.
+ * A helper component for the Check icon.
- *
- * @param props - Optional className for custom styling.
  */
 function Check({ className }: { className?: string }) {
   return (

frontend/app/(sidebar)/hub/page.tsx

@@ -170,7 +170,7 @@ export default function KnowledgeHubPage() {
                     </CardContent>
                     <CardFooter className="p-4 pt-0 flex justify-between items-center">
                       <div className="text-sm text-muted-foreground">By {blog.author}</div>
-                      <Link href={`/blog/${blog.id}`}>
+                      <Link href={`/hub/${blog.id}`}>
                         <Button variant="ghost" size="sm" className="gap-1">
                           Read <ChevronRight className="h-4 w-4" />
                         </Button>