From cbb74059b318fb227d6a26bedf033af9b7a6a218 Mon Sep 17 00:00:00 2001
From: Sam Becker <sam@sambecker.com>
Date: Sun, 23 Mar 2025 23:44:21 -0500
Subject: [PATCH] Remove exifr dependency

---
 .vscode/settings.json         |  1 -
 package.json                  |  1 -
 pnpm-lock.yaml                |  8 --------
 src/components/ImageInput.tsx |  6 ++----
 src/utility/exif.ts           | 37 +++++++++++++++++++++++++++++++++++
 5 files changed, 39 insertions(+), 14 deletions(-)

diff --git a/.vscode/settings.json b/.vscode/settings.json
index 5ef0cd4d..ea94cecd 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -17,7 +17,6 @@
     "depluralizes",
     "Eterna",
     "exif",
-    "exifr",
     "exiftool",
     "favicons",
     "favs",
diff --git a/package.json b/package.json
index d9d875be..289cc815 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,6 @@
     "cmdk": "^1.1.1",
     "date-fns": "^4.1.0",
     "date-fns-tz": "^3.2.0",
-    "exifr": "^7.1.3",
     "fast-deep-equal": "^3.1.3",
     "framer-motion": "^12.5.0",
     "nanoid": "^5.1.5",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 32b9bdc4..fb7ca279 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -59,9 +59,6 @@ importers:
       date-fns-tz:
         specifier: ^3.2.0
         version: 3.2.0(date-fns@4.1.0)
-      exifr:
-        specifier: ^7.1.3
-        version: 7.1.3
       fast-deep-equal:
         specifier: ^3.1.3
         version: 3.1.3
@@ -2469,9 +2466,6 @@ packages:
     resolution: {integrity: sha512-8uSpZZocAZRBAPIEINJj3Lo9HyGitllczc27Eh5YYojjMFMn8yHMDMaUHE2Jqfq05D/wucwI4JGURyXt1vchyg==}
     engines: {node: '>=10'}
 
-  exifr@7.1.3:
-    resolution: {integrity: sha512-g/aje2noHivrRSLbAUtBPWFbxKdKhgj/xr1vATDdUXPOFYJlQ62Ft0oy+72V6XLIpDJfHs6gXLbBLAolqOXYRw==}
-
   exit@0.1.2:
     resolution: {integrity: sha512-Zk/eNKV2zbjpKzrsQ+n1G6poVbErQxJ0LBOJXaKZ1EViLzH+hrLu9cdXI4zw9dBQJslwBEpbQ2P1oS7nDxs6jQ==}
     engines: {node: '>= 0.8.0'}
@@ -7229,8 +7223,6 @@ snapshots:
       signal-exit: 3.0.7
       strip-final-newline: 2.0.0
 
-  exifr@7.1.3: {}
-
   exit@0.1.2: {}
 
   expect@29.7.0:
diff --git a/src/components/ImageInput.tsx b/src/components/ImageInput.tsx
index d9e4702b..44c50d22 100644
--- a/src/components/ImageInput.tsx
+++ b/src/components/ImageInput.tsx
@@ -2,8 +2,7 @@
 
 import { blobToImage } from '@/utility/blob';
 import { useRef, RefObject } from 'react';
-import { CopyExif } from '@/utility/exif';
-import exifr from 'exifr';
+import { CopyExif, getOrientation } from '@/utility/exif';
 import { clsx } from 'clsx/lite';
 import { ACCEPTED_PHOTO_FILE_TYPES } from '@/photo';
 import { FiUploadCloud } from 'react-icons/fi';
@@ -131,8 +130,7 @@ export default function ImageInput({
 
                     ctx.save();
                     
-                    let orientation = await exifr
-                      .orientation(file)
+                    let orientation = await getOrientation(file)
                       .catch(() => 1) ?? 1;
 
                     // Preserve EXIF data for PNGs
diff --git a/src/utility/exif.ts b/src/utility/exif.ts
index f732f53e..9eb7c65e 100644
--- a/src/utility/exif.ts
+++ b/src/utility/exif.ts
@@ -124,3 +124,40 @@ export const CopyExif = async (
   return new Blob([dest.slice(0, 2), exif, dest.slice(2)], { type });
 };
 
+export const getOrientation = (file: File): Promise<number> =>
+  file.arrayBuffer().then(buffer => {
+    const view = new DataView(buffer);
+
+    if (view.getUint16(0, false) !== 0xFFD8) {
+      return -2;
+    } else {
+      const length = view.byteLength;
+      let offset = 2;
+      while (offset < length)  {
+        if (view.getUint16(offset + 2, false) <= 8) return -1;
+        const marker = view.getUint16(offset, false);
+        offset += 2;
+        if (marker === 0xFFE1) {
+          if (view.getUint32(offset += 2, false) !== 0x45786966) {
+            return -1;
+          } else {
+            const little = view.getUint16(offset += 6, false) === 0x4949;
+            offset += view.getUint32(offset + 4, little);
+            const tags = view.getUint16(offset, little);
+            offset += 2;
+            for (let i = 0; i < tags; i++) {
+              if (view.getUint16(offset + (i * 12), little) === 0x0112) {
+                return view.getUint16(offset + (i * 12) + 8, little);
+              }
+            }
+          }
+        } else if ((marker & 0xFF00) !== 0xFF00) {
+          break;
+        } else { 
+          offset += view.getUint16(offset, false);
+        }
+      }
+
+      return -1;
+    };
+  });