feat: add dummy api for inventory

frontend/api/inventory.ts

@@ -0,0 +1,97 @@
+import axiosInstance from "./config";
+import type { InventoryItem, CreateInventoryItemInput } from "@/types";
+
+/**
+ * Simulates an API call to fetch inventory items.
+ * Waits for a simulated delay and then attempts an axios GET request.
+ * If the request fails, returns fallback dummy data.
+ */
+export async function fetchInventoryItems(): Promise<InventoryItem[]> {
+  try {
+    const response = await axiosInstance.get<InventoryItem[]>("/api/inventory");
+    return response.data;
+  } catch (error) {
+    // Fallback dummy data
+    return [
+      {
+        id: 1,
+        name: "Tomato Seeds",
+        category: "Seeds",
+        type: "Plantation",
+        quantity: 500,
+        unit: "packets",
+        lastUpdated: "2023-03-01",
+        status: "In Stock",
+      },
+      {
+        id: 2,
+        name: "NPK Fertilizer",
+        category: "Fertilizer",
+        type: "Fertilizer",
+        quantity: 200,
+        unit: "kg",
+        lastUpdated: "2023-03-05",
+        status: "Low Stock",
+      },
+      {
+        id: 3,
+        name: "Corn Seeds",
+        category: "Seeds",
+        type: "Plantation",
+        quantity: 300,
+        unit: "packets",
+        lastUpdated: "2023-03-10",
+        status: "In Stock",
+      },
+      {
+        id: 4,
+        name: "Organic Compost",
+        category: "Fertilizer",
+        type: "Fertilizer",
+        quantity: 150,
+        unit: "kg",
+        lastUpdated: "2023-03-15",
+        status: "In Stock",
+      },
+      {
+        id: 5,
+        name: "Wheat Seeds",
+        category: "Seeds",
+        type: "Plantation",
+        quantity: 250,
+        unit: "packets",
+        lastUpdated: "2023-03-20",
+        status: "In Stock",
+      },
+    ];
+  }
+}
+
+/**
+ * Simulates creating a new inventory item.
+ * Uses axios POST and if unavailable, returns a simulated response.
+ *
+ * Note: The function accepts all fields except id, lastUpdated, and status.
+ */
+export async function createInventoryItem(
+  item: Omit<InventoryItem, "id" | "lastUpdated" | "status">
+): Promise<InventoryItem> {
+  // Simulate network delay
+  await new Promise((resolve) => setTimeout(resolve, 500));
+  try {
+    const response = await axiosInstance.post<InventoryItem>("/api/inventory", item);
+    return response.data;
+  } catch (error) {
+    // Simulate successful creation if API endpoint is not available
+    return {
+      id: Math.floor(Math.random() * 1000),
+      name: item.name,
+      category: item.category,
+      type: item.type,
+      quantity: item.quantity,
+      unit: item.unit,
+      lastUpdated: new Date().toISOString(),
+      status: "In Stock",
+    };
+  }
+}

frontend/app/(sidebar)/inventory/add-inventory-item.tsx

@@ -3,6 +3,7 @@
 import { useState } from "react";
 import { CalendarIcon } from "lucide-react";
 import { format } from "date-fns";
+import { useMutation, useQueryClient } from "@tanstack/react-query";
 
 import { Button } from "@/components/ui/button";
 import { Calendar } from "@/components/ui/calendar";
@@ -28,10 +29,47 @@ import {
   SelectValue,
 } from "@/components/ui/select";
 import { cn } from "@/lib/utils";
+import { createInventoryItem } from "@/api/inventory";
+import type { CreateInventoryItemInput } from "@/types";
 
 export function AddInventoryItem() {
-  const [date, setDate] = useState<Date>();
+  const [date, setDate] = useState<Date | undefined>();
   const [open, setOpen] = useState(false);
+  const [itemName, setItemName] = useState("");
+  const [itemType, setItemType] = useState("");
+  const [itemCategory, setItemCategory] = useState("");
+  const [itemQuantity, setItemQuantity] = useState(0);
+  const [itemUnit, setItemUnit] = useState("");
+
+  const queryClient = useQueryClient();
+
+  const mutation = useMutation({
+    mutationFn: (item: CreateInventoryItemInput) => createInventoryItem(item),
+    onSuccess: () => {
+      // Invalidate queries to refresh inventory data.
+      queryClient.invalidateQueries({ queryKey: ["inventoryItems"] });
+      // Reset form fields and close dialog.
+      setItemName("");
+      setItemType("");
+      setItemCategory("");
+      setItemQuantity(0);
+      setItemUnit("");
+      setDate(undefined);
+      setOpen(false);
+    },
+  });
+
+  const handleSave = () => {
+    // Basic validation (you can extend this as needed)
+    if (!itemName || !itemType || !itemCategory || !itemUnit) return;
+    mutation.mutate({
+      name: itemName,
+      type: itemType,
+      category: itemCategory,
+      quantity: itemQuantity,
+      unit: itemUnit,
+    });
+  };
 
   return (
     <Dialog open={open} onOpenChange={setOpen}>
@@ -48,13 +86,13 @@ export function AddInventoryItem() {
             <Label htmlFor="name" className="text-right">
               Name
             </Label>
-            <Input id="name" className="col-span-3" />
+            <Input id="name" className="col-span-3" value={itemName} onChange={(e) => setItemName(e.target.value)} />
           </div>
           <div className="grid grid-cols-4 items-center gap-4">
             <Label htmlFor="type" className="text-right">
               Type
             </Label>
-            <Select>
+            <Select value={itemType} onValueChange={setItemType}>
               <SelectTrigger className="col-span-3">
                 <SelectValue placeholder="Select type" />
               </SelectTrigger>
@@ -71,19 +109,37 @@ export function AddInventoryItem() {
             <Label htmlFor="category" className="text-right">
               Category
             </Label>
-            <Input id="category" className="col-span-3" placeholder="e.g., Seeds, Organic" />
+            <Input
+              id="category"
+              className="col-span-3"
+              placeholder="e.g., Seeds, Organic"
+              value={itemCategory}
+              onChange={(e) => setItemCategory(e.target.value)}
+            />
           </div>
           <div className="grid grid-cols-4 items-center gap-4">
             <Label htmlFor="quantity" className="text-right">
               Quantity
             </Label>
-            <Input id="quantity" type="number" className="col-span-3" />
+            <Input
+              id="quantity"
+              type="number"
+              className="col-span-3"
+              value={itemQuantity}
+              onChange={(e) => setItemQuantity(Number(e.target.value))}
+            />
           </div>
           <div className="grid grid-cols-4 items-center gap-4">
             <Label htmlFor="unit" className="text-right">
               Unit
             </Label>
-            <Input id="unit" className="col-span-3" placeholder="e.g., kg, packets" />
+            <Input
+              id="unit"
+              className="col-span-3"
+              placeholder="e.g., kg, packets"
+              value={itemUnit}
+              onChange={(e) => setItemUnit(e.target.value)}
+            />
           </div>
           <div className="grid grid-cols-4 items-center gap-4">
             <Label htmlFor="date" className="text-right">
@@ -105,7 +161,7 @@ export function AddInventoryItem() {
           </div>
         </div>
         <DialogFooter>
-          <Button type="submit" onClick={() => setOpen(false)}>
+          <Button type="submit" onClick={handleSave}>
             Save Item
           </Button>
         </DialogFooter>

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

@@ -1,6 +1,7 @@
 "use client";
 
 import { useState } from "react";
+import { useQuery } from "@tanstack/react-query";
 import { Calendar, ChevronDown, Plus, Search } from "lucide-react";
 
 import { Button } from "@/components/ui/button";
@@ -12,66 +13,36 @@ import { Popover, PopoverContent, PopoverTrigger } from "@/components/ui/popover
 import { Calendar as CalendarComponent } from "@/components/ui/calendar";
 import { Badge } from "@/components/ui/badge";
 
+import { fetchInventoryItems } from "@/api/inventory";
+import { AddInventoryItem } from "./add-inventory-item";
+
 export default function InventoryPage() {
   const [date, setDate] = useState<Date>();
   const [inventoryType, setInventoryType] = useState("all");
   const [currentPage, setCurrentPage] = useState(1);
 
-  // Sample inventory data
-  const inventoryItems = [
-    {
-      id: 1,
-      name: "Tomato Seeds",
-      category: "Seeds",
-      type: "Plantation",
-      quantity: 500,
-      unit: "packets",
-      lastUpdated: "2023-03-01",
-      status: "In Stock",
-    },
-    {
-      id: 2,
-      name: "NPK Fertilizer",
-      category: "Fertilizer",
-      type: "Fertilizer",
-      quantity: 200,
-      unit: "kg",
-      lastUpdated: "2023-03-05",
-      status: "Low Stock",
-    },
-    {
-      id: 3,
-      name: "Corn Seeds",
-      category: "Seeds",
-      type: "Plantation",
-      quantity: 300,
-      unit: "packets",
-      lastUpdated: "2023-03-10",
-      status: "In Stock",
-    },
-    {
-      id: 4,
-      name: "Organic Compost",
-      category: "Fertilizer",
-      type: "Fertilizer",
-      quantity: 150,
-      unit: "kg",
-      lastUpdated: "2023-03-15",
-      status: "In Stock",
-    },
-    {
-      id: 5,
-      name: "Wheat Seeds",
-      category: "Seeds",
-      type: "Plantation",
-      quantity: 250,
-      unit: "packets",
-      lastUpdated: "2023-03-20",
-      status: "In Stock",
-    },
-  ];
+  // Fetch inventory items using react-query.
+  const {
+    data: inventoryItems,
+    isLoading,
+    isError,
+  } = useQuery({
+    queryKey: ["inventoryItems"],
+    queryFn: fetchInventoryItems,
+    staleTime: 60 * 1000,
+  });
 
-  // Filter items based on selected type
+  if (isLoading) {
+    return <div className="flex min-h-screen bg-background items-center justify-center">Loading...</div>;
+  }
+
+  if (isError || !inventoryItems) {
+    return (
+      <div className="flex min-h-screen bg-background items-center justify-center">Error loading inventory data.</div>
+    );
+  }
+
+  // Filter items based on selected type.
   const filteredItems =
     inventoryType === "all"
       ? inventoryItems
@@ -81,7 +52,6 @@ export default function InventoryPage() {
 
   return (
     <div className="flex min-h-screen bg-background">
-      {/* Main content */}
       <div className="flex-1 flex flex-col">
         <main className="flex-1 p-6">
           <h1 className="text-2xl font-bold tracking-tight mb-6">Inventory</h1>
@@ -130,9 +100,7 @@ export default function InventoryPage() {
                 <Input type="search" placeholder="Search Farms" className="pl-8" />
               </div>
 
-              <Button>
-                <Plus className="mr-2 h-4 w-4" /> Add
-              </Button>
+              <AddInventoryItem />
             </div>
           </div>
 

frontend/types.ts

@@ -58,3 +58,16 @@ export interface User {
   Avatar: string;
   IsActive: boolean;
 }
+
+export type InventoryItem = {
+  id: number;
+  name: string;
+  category: string;
+  type: string;
+  quantity: number;
+  unit: string;
+  lastUpdated: string;
+  status: string;
+};
+
+export type CreateInventoryItemInput = Omit<InventoryItem, "id" | "lastUpdated" | "status">;