feat: add color-blindness API route and integration tests

apps/api/src/routes/tools/color-blindness.ts

@@ -0,0 +1,39 @@
+import { colorBlindness } from "@snapotter/image-engine";
+import type { FastifyInstance } from "fastify";
+import sharp from "sharp";
+import { z } from "zod";
+import { resolveOutputFormat } from "../../lib/output-format.js";
+import { createToolRoute } from "../tool-factory.js";
+
+const settingsSchema = z.object({
+  simulationType: z
+    .enum([
+      "protanopia",
+      "deuteranopia",
+      "tritanopia",
+      "protanomaly",
+      "deuteranomaly",
+      "tritanomaly",
+      "achromatopsia",
+      "blueConeMonochromacy",
+    ])
+    .default("deuteranomaly"),
+});
+
+export function registerColorBlindness(app: FastifyInstance) {
+  createToolRoute(app, {
+    toolId: "color-blindness",
+    settingsSchema,
+    process: async (inputBuffer, settings, filename) => {
+      const image = sharp(inputBuffer);
+      const result = await colorBlindness(image, { type: settings.simulationType });
+
+      const outputFormat = await resolveOutputFormat(inputBuffer, filename);
+      const buffer = await result
+        .toFormat(outputFormat.format, { quality: outputFormat.quality })
+        .toBuffer();
+
+      return { buffer, filename, contentType: outputFormat.contentType };
+    },
+  });
+}

apps/api/src/routes/tools/index.ts

@@ -8,6 +8,7 @@ import { registerBorder } from "./border.js";
 import { registerBulkRename } from "./bulk-rename.js";
 import { registerCollage } from "./collage.js";
 import { registerColorAdjustments } from "./color-adjustments.js";
+import { registerColorBlindness } from "./color-blindness.js";
 import { registerColorPalette } from "./color-palette.js";
 import { registerColorize } from "./colorize.js";
 import { registerCompare } from "./compare.js";
@@ -131,6 +132,7 @@ export async function registerToolRoutes(app: FastifyInstance): Promise<void> {
 
     // Adjustments extra
     { id: "replace-color", register: registerReplaceColor },
+    { id: "color-blindness", register: registerColorBlindness },
 
     // AI Tools
     { id: "remove-background", register: registerRemoveBackground },