feat: add stitch settings UI component

apps/web/src/components/tools/stitch-settings.tsx

@@ -0,0 +1,183 @@
+import { ChevronDown, ChevronUp, Download, Loader2 } from "lucide-react";
+import { useState } from "react";
+import { formatHeaders } from "@/lib/api";
+import { useFileStore } from "@/stores/file-store";
+
+type Direction = "horizontal" | "vertical";
+type ResizeMode = "fit" | "original";
+type OutputFormat = "png" | "jpeg" | "webp";
+
+export function StitchSettings() {
+  const { files, processing, error, setProcessing, setError, setProcessedUrl, setSizes, setJobId } =
+    useFileStore();
+  const [direction, setDirection] = useState<Direction>("horizontal");
+  const [showAdvanced, setShowAdvanced] = useState(false);
+  const [resizeMode, setResizeMode] = useState<ResizeMode>("fit");
+  const [gap, setGap] = useState(0);
+  const [backgroundColor, setBackgroundColor] = useState("#FFFFFF");
+  const [format, setFormat] = useState<OutputFormat>("png");
+  const [downloadUrl, setDownloadUrl] = useState<string | null>(null);
+
+  const handleProcess = async () => {
+    if (files.length < 2) return;
+
+    setProcessing(true);
+    setError(null);
+    setDownloadUrl(null);
+
+    try {
+      const formData = new FormData();
+      for (const file of files) {
+        formData.append("file", file);
+      }
+      formData.append(
+        "settings",
+        JSON.stringify({ direction, resizeMode, gap, backgroundColor, format }),
+      );
+
+      const res = await fetch("/api/v1/tools/stitch", {
+        method: "POST",
+        headers: formatHeaders(),
+        body: formData,
+      });
+
+      if (!res.ok) {
+        const body = await res.json().catch(() => ({}));
+        throw new Error(body.error || `Failed: ${res.status}`);
+      }
+
+      const result = await res.json();
+      setJobId(result.jobId);
+      setProcessedUrl(result.downloadUrl);
+      setDownloadUrl(result.downloadUrl);
+      setSizes(result.originalSize, result.processedSize);
+    } catch (err) {
+      setError(err instanceof Error ? err.message : "Stitch failed");
+    } finally {
+      setProcessing(false);
+    }
+  };
+
+  const hasEnoughFiles = files.length >= 2;
+
+  return (
+    <div className="space-y-4">
+      <div>
+        <p className="text-xs text-muted-foreground">Direction</p>
+        <div className="grid grid-cols-2 gap-1 mt-1">
+          {(["horizontal", "vertical"] as const).map((d) => (
+            <button
+              type="button"
+              key={d}
+              onClick={() => setDirection(d)}
+              className={`capitalize text-xs py-1.5 rounded ${direction === d ? "bg-primary text-primary-foreground" : "bg-muted text-muted-foreground"}`}
+            >
+              {d}
+            </button>
+          ))}
+        </div>
+      </div>
+
+      <button
+        type="button"
+        onClick={() => setShowAdvanced(!showAdvanced)}
+        className="flex items-center gap-1 text-xs text-muted-foreground"
+      >
+        Advanced
+        {showAdvanced ? <ChevronUp className="h-3 w-3" /> : <ChevronDown className="h-3 w-3" />}
+      </button>
+
+      {showAdvanced && (
+        <div className="space-y-4 border border-border rounded-lg p-3">
+          <div>
+            <p className="text-xs text-muted-foreground">Resize Mode</p>
+            <div className="grid grid-cols-2 gap-1 mt-1">
+              {(["fit", "original"] as const).map((m) => (
+                <button
+                  type="button"
+                  key={m}
+                  onClick={() => setResizeMode(m)}
+                  className={`capitalize text-xs py-1.5 rounded ${resizeMode === m ? "bg-primary text-primary-foreground" : "bg-muted text-muted-foreground"}`}
+                >
+                  {m}
+                </button>
+              ))}
+            </div>
+          </div>
+
+          <div>
+            <div className="flex justify-between items-center">
+              <label htmlFor="stitch-gap" className="text-xs text-muted-foreground">
+                Gap
+              </label>
+              <span className="text-xs font-mono text-foreground">{gap}px</span>
+            </div>
+            <input
+              id="stitch-gap"
+              type="range"
+              min={0}
+              max={100}
+              value={gap}
+              onChange={(e) => setGap(Number(e.target.value))}
+              className="w-full mt-1"
+            />
+          </div>
+
+          <div>
+            <label htmlFor="stitch-background-color" className="text-xs text-muted-foreground">
+              Background Color
+            </label>
+            <input
+              id="stitch-background-color"
+              type="color"
+              value={backgroundColor}
+              onChange={(e) => setBackgroundColor(e.target.value)}
+              className="w-full mt-0.5 h-8 rounded border border-border"
+            />
+          </div>
+
+          <div>
+            <p className="text-xs text-muted-foreground">Output Format</p>
+            <div className="grid grid-cols-3 gap-1 mt-1">
+              {(["png", "jpeg", "webp"] as const).map((f) => (
+                <button
+                  type="button"
+                  key={f}
+                  onClick={() => setFormat(f)}
+                  className={`uppercase text-xs py-1.5 rounded ${format === f ? "bg-primary text-primary-foreground" : "bg-muted text-muted-foreground"}`}
+                >
+                  {f}
+                </button>
+              ))}
+            </div>
+          </div>
+        </div>
+      )}
+
+      {error && <p className="text-xs text-red-500">{error}</p>}
+
+      <button
+        type="button"
+        data-testid="stitch-submit"
+        onClick={handleProcess}
+        disabled={!hasEnoughFiles || processing}
+        className="w-full py-2.5 rounded-lg bg-primary text-primary-foreground font-medium disabled:opacity-50 disabled:cursor-not-allowed flex items-center justify-center gap-2"
+      >
+        {processing && <Loader2 className="h-4 w-4 animate-spin" />}
+        {processing ? "Stitching..." : `Stitch ${files.length} images`}
+      </button>
+
+      {downloadUrl && (
+        <a
+          href={downloadUrl}
+          download
+          data-testid="stitch-download"
+          className="w-full py-2.5 rounded-lg border border-primary text-primary font-medium flex items-center justify-center gap-2 hover:bg-primary/5"
+        >
+          <Download className="h-4 w-4" />
+          Download Stitched Image
+        </a>
+      )}
+    </div>
+  );
+}