From e885560c458b073424200a09d0e1c8d2cc8ff01c Mon Sep 17 00:00:00 2001
From: Ilia Mashkov <hikkikomori7@gmail.com>
Date: Fri, 2 Jan 2026 11:14:15 +0300
Subject: [PATCH] feat(CheckboxFilter): create CheckboxFilter component

---
 .../ui/CheckboxFilter/CheckboxFilter.svelte   | 98 +++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 src/shared/ui/CheckboxFilter/CheckboxFilter.svelte

diff --git a/src/shared/ui/CheckboxFilter/CheckboxFilter.svelte b/src/shared/ui/CheckboxFilter/CheckboxFilter.svelte
new file mode 100644
index 0000000..50d1692
--- /dev/null
+++ b/src/shared/ui/CheckboxFilter/CheckboxFilter.svelte
@@ -0,0 +1,98 @@
+<script lang="ts">
+import { buttonVariants } from '$shared/shadcn/ui/button';
+import { Checkbox } from '$shared/shadcn/ui/checkbox';
+import * as Collapsible from '$shared/shadcn/ui/collapsible';
+import { Label } from '$shared/shadcn/ui/label';
+import type { Category } from '$shared/store/createFilterStore';
+import ChevronsUpDownIcon from '@lucide/svelte/icons/chevrons-up-down';
+import { onMount } from 'svelte';
+import { flip } from 'svelte/animate';
+import { blur } from 'svelte/transition';
+
+interface CategoryFilterProps {
+    /**
+     * Displayed filter name
+     */
+    filterName: string;
+    /**
+     * List of filter categories
+     */
+    categories: Category[];
+    /**
+     * Callback for category toggle event
+     */
+    onCategoryToggle: (id: string) => void;
+}
+
+const { filterName, categories, onCategoryToggle }: CategoryFilterProps = $props();
+
+// Track collapsible state for animations
+let isOpen = $state(true);
+
+// Respect user's motion preferences for accessibility
+let prefersReducedMotion = $state(false);
+
+onMount(() => {
+    if (typeof window !== 'undefined') {
+        const mediaQuery = window.matchMedia('(prefers-reduced-motion: reduce)');
+        prefersReducedMotion = mediaQuery.matches;
+
+        // Listen for changes in motion preference
+        const handleChange = (e: MediaQueryListEvent) => {
+            prefersReducedMotion = e.matches;
+        };
+
+        mediaQuery.addEventListener('change', handleChange);
+
+        return () => {
+            mediaQuery.removeEventListener('change', handleChange);
+        };
+    }
+});
+
+// Reactive animation configurations
+const blurConfig = $derived({
+    duration: prefersReducedMotion ? 0 : 250,
+    amount: 5,
+    opacity: 0.5,
+});
+
+const checkboxFlipConfig = $derived({
+    duration: prefersReducedMotion ? 0 : 300,
+});
+</script>
+
+<Collapsible.Root bind:open={isOpen} class="space-y-2">
+    <div class="flex items-center justify-between space-x-4 px-4">
+        <Collapsible.Trigger
+            class={buttonVariants({ variant: 'ghost', size: 'sm', class: 'w-fit' })}
+        >
+            <h4 class="text-sm font-semibold">{filterName}</h4>
+            <ChevronsUpDownIcon class="h-4 w-4" />
+        </Collapsible.Trigger>
+    </div>
+
+    <Collapsible.Content>
+        {#if isOpen}
+            <div transition:blur|local={blurConfig} class="px-4 py-2">
+                <div class="flex flex-col gap-2">
+                    {#each categories as category (category.id)}
+                        <div class="flex items-center gap-3" animate:flip={checkboxFlipConfig}>
+                            <Checkbox
+                                id={category.id}
+                                onCheckedChange={() => onCategoryToggle(category.id)}
+                                class="cursor-pointer transition-transform active:scale-95"
+                            />
+                            <Label
+                                for={category.id}
+                                class="cursor-pointer transition-colors hover:text-foreground/80"
+                            >
+                                {category.name}
+                            </Label>
+                        </div>
+                    {/each}
+                </div>
+            </div>
+        {/if}
+    </Collapsible.Content>
+</Collapsible.Root>