feat: add OCR endpoint using OpenRouter Sonoma Sky Alpha model

apps/server/src/db/migrations/meta/0000_snapshot.json

@@ -93,12 +93,8 @@
           "name": "account_user_id_user_id_fk",
           "tableFrom": "account",
           "tableTo": "user",
-          "columnsFrom": [
-            "user_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
           "onDelete": "cascade",
           "onUpdate": "no action"
         }
@@ -168,12 +164,8 @@
           "name": "session_user_id_user_id_fk",
           "tableFrom": "session",
           "tableTo": "user",
-          "columnsFrom": [
-            "user_id"
-          ],
-          "columnsTo": [
-            "id"
-          ],
+          "columnsFrom": ["user_id"],
+          "columnsTo": ["id"],
           "onDelete": "cascade",
           "onUpdate": "no action"
         }
@@ -183,9 +175,7 @@
         "session_token_unique": {
           "name": "session_token_unique",
           "nullsNotDistinct": false,
-          "columns": [
-            "token"
-          ]
+          "columns": ["token"]
         }
       },
       "policies": {},
@@ -246,9 +236,7 @@
         "user_email_unique": {
           "name": "user_email_unique",
           "nullsNotDistinct": false,
-          "columns": [
-            "email"
-          ]
+          "columns": ["email"]
         }
       },
       "policies": {},
@@ -316,4 +304,4 @@
     "schemas": {},
     "tables": {}
   }
-}
+}

apps/server/src/db/migrations/meta/_journal.json

@@ -10,4 +10,4 @@
       "breakpoints": true
     }
   ]
-}
+}

apps/server/src/index.ts

@@ -3,6 +3,7 @@ import { execSync } from "node:child_process";
 import { join } from "node:path";
 import { trpcServer } from "@hono/trpc-server";
 import { Hono } from "hono";
+import { env } from "hono/adapter";
 import { cors } from "hono/cors";
 import { logger as honoLogger } from "hono/logger";
 import { createContext } from "./lib/context";
@@ -44,6 +45,89 @@ app.use(
   })
 );
 
+// Utilities for OpenRouter
+async function openRouterChat(
+  apiKey: string,
+  body: unknown,
+  extra?: { referer?: string; title?: string }
+) {
+  const headers: Record<string, string> = {
+    Authorization: `Bearer ${apiKey}`,
+    "Content-Type": "application/json",
+  };
+  if (extra?.referer) headers["HTTP-Referer"] = extra.referer;
+  if (extra?.title) headers["X-Title"] = extra.title;
+  const res = await fetch("https://openrouter.ai/api/v1/chat/completions", {
+    method: "POST",
+    headers,
+    body: JSON.stringify(body),
+  });
+  return res;
+}
+
+function arrayBufferToBase64(buf: ArrayBuffer) {
+  const bytes = new Uint8Array(buf);
+  let binary = "";
+  for (let i = 0; i < bytes.length; i++)
+    binary += String.fromCharCode(bytes[i]);
+  return Buffer.from(binary, "binary").toString("base64");
+}
+
+// OCR via OpenRouter Sonoma Sky Alpha
+app.post("/ai/ocr", async (c) => {
+  const { OPENROUTER_API_KEY, OPENROUTER_SITE_URL, OPENROUTER_SITE_NAME, MOCK } =
+    env<{
+      OPENROUTER_API_KEY?: string;
+      OPENROUTER_SITE_URL?: string;
+      OPENROUTER_SITE_NAME?: string;
+      MOCK?: string;
+    }>(c);
+  if (!OPENROUTER_API_KEY) {
+    return c.json({ error: "Missing OPENROUTER_API_KEY" }, 500);
+  }
+  
+  const blob = await c.req.blob();
+  const contentType = c.req.header("content-type") || "image/png";
+  const base64 = arrayBufferToBase64(await blob.arrayBuffer());
+  const dataUrl = `data:${contentType};base64,${base64}`;
+
+  const body = {
+    model: "openrouter/sonoma-sky-alpha",
+    messages: [
+      {
+        role: "system",
+        content:
+          "You are an OCR engine. Extract all text visible in the provided image. Respond with plain text only, preserving line breaks and reading order. Do not add commentary.",
+      },
+      {
+        role: "user",
+        content: [
+          {
+            type: "text",
+            text: "Extract text from this image and return only the text.",
+          },
+          { type: "image_url", image_url: { url: dataUrl } },
+        ],
+      },
+    ],
+  };
+
+  const res = await openRouterChat(OPENROUTER_API_KEY as string, body, {
+    referer: OPENROUTER_SITE_URL,
+    title: OPENROUTER_SITE_NAME,
+  });
+  if (!res.ok) {
+    const err = await res.text();
+    return c.json(
+      { error: `OpenRouter error ${res.status}`, details: err },
+      502
+    );
+  }
+  const json = (await res.json()) as any;
+  const text: string = json?.choices?.[0]?.message?.content ?? "";
+  return c.json({ text });
+});
+
 app.get("/", (c) => {
   return c.text("OK");
 });