refactor: simplify ItemForm API using events instead of callback props

src/lib/components/wishlist/ItemForm.svelte

@@ -11,16 +11,19 @@
   import { languageStore } from '$lib/stores/language.svelte';
   import ThemeCard from '$lib/components/themes/ThemeCard.svelte';
   import { getCardStyle } from '$lib/utils/colors';
+  import { createEventDispatcher } from 'svelte';
+
+  const dispatch = createEventDispatcher<{
+    success: void;
+    cancel: void;
+    colorChange: { itemId: string; color: string };
+    positionChange: { itemId: string; newPosition: number };
+  }>();
 
   interface Props {
     item?: Item | null;
     mode: 'add' | 'edit';
-    onSuccess?: () => void;
-    onCancel?: () => void;
-    onColorChange?: (itemId: string, color: string) => void;
-    currentPosition?: number;
-    totalItems?: number;
-    onPositionChange?: (newPosition: number) => void;
+    itemCount?: number;
     wishlistColor?: string | null;
     wishlistTheme?: string | null;
   }
@@ -28,12 +31,7 @@
   let {
     item = null,
     mode,
-    onSuccess,
-    onCancel,
-    onColorChange,
-    currentPosition = 1,
-    totalItems = 1,
-    onPositionChange,
+    itemCount = 1,
     wishlistColor = null,
     wishlistTheme = null
   }: Props = $props();
@@ -47,6 +45,7 @@
   let linkUrl = $state(item?.link || '');
   let imageUrl = $state(item?.imageUrl || '');
   let color = $state<string | null>(item?.color || null);
+  let position = $state(item?.order ? Number(item.order) + 1 : 1);
   let scrapedImages = $state<string[]>([]);
   let isLoadingImages = $state(false);
   let debounceTimer: ReturnType<typeof setTimeout> | null = null;
@@ -97,7 +96,13 @@
 
   function handleColorChange() {
     if (isEdit && item) {
-      onColorChange?.(item.id, color || '');
+      dispatch('colorChange', { itemId: item.id, color: color || '' });
+    }
+  }
+
+  function handlePositionChange() {
+    if (isEdit && item) {
+      dispatch('positionChange', { itemId: item.id, newPosition: position });
     }
   }
 
@@ -121,7 +126,7 @@
       use:enhance={() => {
         return async ({ update }) => {
           await update({ reset: false });
-          onSuccess?.();
+          dispatch('success');
         };
       }}
       class="space-y-4"
@@ -222,20 +227,16 @@
             <Label for="position">{t.form.position}</Label>
             <Input
               id="position"
+              name="position"
               type="number"
               min="1"
-              max={totalItems}
-              value={currentPosition}
-              onchange={(e) => {
-                const newPos = parseInt((e.target as HTMLInputElement).value);
-                if (newPos >= 1 && newPos <= totalItems) {
-                  onPositionChange?.(newPos);
-                }
-              }}
+              max={itemCount}
+              bind:value={position}
+              onchange={handlePositionChange}
               placeholder="1"
             />
             <p class="text-sm text-muted-foreground">
-              Choose where this item appears in your wishlist (1 = top, {totalItems} = bottom)
+              Choose where this item appears in your wishlist (1 = top, {itemCount} = bottom)
             </p>
           </div>
         {/if}
@@ -243,8 +244,8 @@
 
       <div class="flex gap-2">
         <Button type="submit" class="flex-1 md:flex-none">{submitLabel}</Button>
-        {#if onCancel}
-          <Button type="button" variant="outline" class="flex-1 md:flex-none" onclick={onCancel}>
+        {#if isEdit}
+          <Button type="button" variant="outline" class="flex-1 md:flex-none" onclick={() => dispatch('cancel')}>
             {t.form.cancel}
           </Button>
         {/if}

src/routes/wishlist/[token]/edit/+page.svelte

@@ -88,10 +88,8 @@
     }
   }
 
-  async function handlePositionChange(newPosition: number) {
-    if (!editingItem) return;
-
-    const currentIndex = items.findIndex((item) => item.id === editingItem.id);
+  async function handlePositionChange(itemId: string, newPosition: number) {
+    const currentIndex = items.findIndex((item) => item.id === itemId);
     if (currentIndex === -1) return;
 
     const newIndex = newPosition - 1; // Convert to 0-based index
@@ -150,7 +148,7 @@
     <div bind:this={addFormElement}>
       <ItemForm
         mode="add"
-        onSuccess={handleItemAdded}
+        on:success={handleItemAdded}
         wishlistColor={currentColor}
         wishlistTheme={currentTheme}
       />
@@ -162,12 +160,11 @@
       <ItemForm
         mode="edit"
         item={editingItem}
-        onSuccess={handleItemUpdated}
-        onCancel={cancelEditing}
-        onColorChange={handleColorChange}
-        currentPosition={items.findIndex((item) => item.id === editingItem.id) + 1}
-        totalItems={items.length}
-        onPositionChange={handlePositionChange}
+        itemCount={items.length}
+        on:success={handleItemUpdated}
+        on:cancel={cancelEditing}
+        on:colorChange={(e) => handleColorChange(e.detail.itemId, e.detail.color)}
+        on:positionChange={(e) => handlePositionChange(e.detail.itemId, e.detail.newPosition)}
         wishlistColor={currentColor}
         wishlistTheme={currentTheme}
       />