Add Category page

src/routes/+layout.svelte

@@ -30,6 +30,10 @@
     {
     Path: "/type",
     Name: "Types",
+    },
+    {
+    Path: "/category",
+    Name: "Categories",
     }
   ]
 </script>

src/routes/category/+page.svelte

@@ -0,0 +1,176 @@
+<script lang="ts">
+  import { onMount } from "svelte";
+  import { type Category } from "$lib/entities";
+
+  let categories: Category[] = $state([]);
+  let error: string | null = $state(null);
+  let editingCategory: Category | null = $state(null);
+  let newCategory: Partial<Category> = $state({
+    name: "",
+    parent_id: 0,
+  });
+
+  onMount(async () => {
+    await fetchCategories();
+  });
+
+  async function fetchCategories() {
+    const result = await fetch("/api/category/all");
+    if (!result.ok) {
+      const obj = await result.json();
+      error = obj.message;
+    } else {
+      categories = await result.json();
+    }
+  }
+
+  async function saveCategory() {
+    const endpoint = editingCategory
+      ? `/api/category/update`
+      : "/api/category/create";
+    const method = editingCategory ? "PUT" : "POST";
+
+    const data = {
+      ...currentCategory,
+      parent_id: Number(currentCategory.parent_id),
+    };
+    const response = await fetch(endpoint, {
+      method,
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify(data),
+    });
+
+    if (!response.ok) {
+      const { message } = await response.json();
+      error = message;
+    } else {
+      await fetchCategories();
+      if (editingCategory) {
+        editingCategory = null;
+      } else {
+        newCategory = {
+          name: "",
+          parent_id: 0,
+        };
+      }
+    }
+  }
+
+  function editCategory(category: Category) {
+    editingCategory = { ...category };
+  }
+
+  async function deleteCategory(id: number) {
+    const response = await fetch(`/api/category/delete`, {
+      method: "DELETE",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ id }),
+    });
+    if (!response.ok) {
+      const { message } = await response.json();
+      error = message;
+    } else {
+      await fetchCategories();
+    }
+  }
+
+  // Helper function to get the name of the parent category
+  function getParentCategoryName(parentId: number) {
+    if (parentId === 0) return "None";
+    const parentCategory = categories.find(
+      (category) => category.id === parentId,
+    );
+    return parentCategory ? parentCategory.name : "Unknown";
+  }
+
+  const currentCategory = $derived(editingCategory ?? newCategory);
+  $inspect(currentCategory);
+</script>
+
+{#if error}
+  <p class="bg-red-100 text-red-700 p-4 rounded">{error}</p>
+{/if}
+
+<div class="container mx-auto my-8 p-6 bg-gray-100 rounded-lg shadow-lg">
+  <h1 class="text-2xl font-bold mb-4 text-center">Manage Categories</h1>
+
+  <div class="mb-8 p-6 bg-white rounded-lg shadow-md">
+    <h2 class="text-xl font-semibold mb-4">
+      {editingCategory ? "Edit Category" : "Add New Category"}
+    </h2>
+    <form onsubmit={saveCategory} class="space-y-4">
+      <label class="block">
+        <span class="text-gray-700">Name:</span>
+        <input
+          type="text"
+          bind:value={currentCategory.name}
+          required
+          class="mt-1 block w-full px-4 py-2 border border-gray-300 rounded-md focus:ring focus:ring-indigo-200 focus:border-indigo-500"
+        />
+      </label>
+
+      <label class="block">
+        <span class="text-gray-700">Parent Category:</span>
+        <select
+          bind:value={currentCategory.parent_id}
+          class="mt-1 block w-full px-4 py-2 border border-gray-300 rounded-md focus:ring focus:ring-indigo-200 focus:border-indigo-500"
+        >
+          <option value="0">None</option>
+          {#each categories as parentCategory}
+            {#if parentCategory.id != currentCategory.id}
+              <option value={parentCategory.id}>{parentCategory.name}</option>
+            {/if}
+          {/each}
+        </select>
+      </label>
+
+      <div class="flex space-x-2">
+        <button
+          type="submit"
+          class="px-4 py-2 bg-indigo-500 text-white rounded-md hover:bg-indigo-600"
+        >
+          {editingCategory ? "Update Category" : "Add Category"}
+        </button>
+        {#if editingCategory}
+          <button
+            type="button"
+            onclick={() => (editingCategory = null)}
+            class="px-4 py-2 bg-gray-300 text-gray-700 rounded-md hover:bg-gray-400"
+          >
+            Cancel
+          </button>
+        {/if}
+      </div>
+    </form>
+  </div>
+
+  <h2 class="text-xl font-semibold mb-4 text-center">Categories List</h2>
+  <ul class="space-y-4">
+    {#each categories as category}
+      <li
+        class="bg-white p-4 rounded-lg shadow-md flex justify-between items-center"
+      >
+        <div>
+          <strong class="block text-lg">{category.name}</strong>
+          <div class="text-sm text-gray-600">
+            Parent: {getParentCategoryName(category.parent_id)}
+          </div>
+        </div>
+        <div class="flex space-x-2">
+          <button
+            onclick={() => editCategory(category)}
+            class="px-4 py-2 bg-blue-500 text-white rounded-md hover:bg-blue-600"
+          >
+            Edit
+          </button>
+          <button
+            onclick={() => deleteCategory(category.id)}
+            class="px-4 py-2 bg-red-500 text-white rounded-md hover:bg-red-600"
+          >
+            Delete
+          </button>
+        </div>
+      </li>
+    {/each}
+  </ul>
+</div>