From 271cab647bb41872c5e205d6236e35eb7fad0810 Mon Sep 17 00:00:00 2001
From: Siddharth Kumar Sah <siddharth123sk@gmail.com>
Date: Mon, 23 Mar 2026 12:47:06 +0800
Subject: [PATCH] feat: add SideBySideComparison component for resize results

---
 .../common/side-by-side-comparison.tsx        | 116 ++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 apps/web/src/components/common/side-by-side-comparison.tsx

diff --git a/apps/web/src/components/common/side-by-side-comparison.tsx b/apps/web/src/components/common/side-by-side-comparison.tsx
new file mode 100644
index 00000000..f484e960
--- /dev/null
+++ b/apps/web/src/components/common/side-by-side-comparison.tsx
@@ -0,0 +1,116 @@
+import { useState } from "react";
+
+interface SideBySideComparisonProps {
+  beforeSrc: string;
+  afterSrc: string;
+  beforeSize?: number;
+  afterSize?: number;
+}
+
+function formatSize(bytes: number): string {
+  if (bytes < 1024) return `${bytes} B`;
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)} KB`;
+  return `${(bytes / (1024 * 1024)).toFixed(2)} MB`;
+}
+
+export function SideBySideComparison({
+  beforeSrc,
+  afterSrc,
+  beforeSize,
+  afterSize,
+}: SideBySideComparisonProps) {
+  const [beforeDims, setBeforeDims] = useState<{ w: number; h: number } | null>(null);
+  const [afterDims, setAfterDims] = useState<{ w: number; h: number } | null>(null);
+
+  const savingsPercent =
+    beforeSize && afterSize && beforeSize > 0
+      ? ((1 - afterSize / beforeSize) * 100).toFixed(1)
+      : null;
+
+  const checkerboard = {
+    backgroundImage: `linear-gradient(45deg, #ccc 25%, transparent 25%),
+      linear-gradient(-45deg, #ccc 25%, transparent 25%),
+      linear-gradient(45deg, transparent 75%, #ccc 75%),
+      linear-gradient(-45deg, transparent 75%, #ccc 75%)`,
+    backgroundSize: "16px 16px",
+    backgroundPosition: "0 0, 0 8px, 8px -8px, -8px 0px",
+  };
+
+  return (
+    <div className="flex flex-col items-center gap-3 w-full max-w-3xl mx-auto">
+      {/* Side-by-side images */}
+      <div className="flex flex-col sm:flex-row gap-4 w-full">
+        {/* Original */}
+        <div className="flex-1 flex flex-col items-center gap-2">
+          <span className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
+            Original
+          </span>
+          <div
+            className="w-full aspect-video rounded-lg border border-border overflow-hidden flex items-center justify-center"
+            style={checkerboard}
+          >
+            <img
+              src={beforeSrc}
+              alt="Original"
+              className="max-w-full max-h-full object-contain"
+              draggable={false}
+              onLoad={(e) => {
+                const img = e.currentTarget;
+                setBeforeDims({ w: img.naturalWidth, h: img.naturalHeight });
+              }}
+            />
+          </div>
+          <div className="text-xs text-muted-foreground text-center space-y-0.5">
+            {beforeDims && (
+              <p>
+                {beforeDims.w} × {beforeDims.h}
+              </p>
+            )}
+            {beforeSize != null && <p>{formatSize(beforeSize)}</p>}
+          </div>
+        </div>
+
+        {/* Resized */}
+        <div className="flex-1 flex flex-col items-center gap-2">
+          <span className="text-xs font-medium text-muted-foreground uppercase tracking-wide">
+            Resized
+          </span>
+          <div
+            className="w-full aspect-video rounded-lg border border-border overflow-hidden flex items-center justify-center"
+            style={checkerboard}
+          >
+            <img
+              src={afterSrc}
+              alt="Resized"
+              className="max-w-full max-h-full object-contain"
+              draggable={false}
+              onLoad={(e) => {
+                const img = e.currentTarget;
+                setAfterDims({ w: img.naturalWidth, h: img.naturalHeight });
+              }}
+            />
+          </div>
+          <div className="text-xs text-muted-foreground text-center space-y-0.5">
+            {afterDims && (
+              <p>
+                {afterDims.w} × {afterDims.h}
+              </p>
+            )}
+            {afterSize != null && <p>{formatSize(afterSize)}</p>}
+          </div>
+        </div>
+      </div>
+
+      {/* Size savings */}
+      {savingsPercent !== null && (
+        <p
+          className={`text-sm font-medium ${Number(savingsPercent) > 0 ? "text-green-600 dark:text-green-400" : "text-red-500"}`}
+        >
+          {Number(savingsPercent) > 0
+            ? `${savingsPercent}% smaller`
+            : `${Math.abs(Number(savingsPercent))}% larger`}
+        </p>
+      )}
+    </div>
+  );
+}