Add video support

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

src/utilities/filesystem.ts

@@ -1,5 +1,6 @@
 import { FileSystem } from 'react-native-file-access';
 import filetypemime from 'magic-bytes.js';
+import { lookup } from 'react-native-mime-types';
 import { MEME_TYPE } from '../database';
 
 const allowedImageMimeTypes = [
@@ -12,43 +13,52 @@ const allowedImageMimeTypes = [
 
 const allowedGifMimeTypes = ['image/gif'];
 
-const allowedMimeTypes = [...allowedImageMimeTypes, ...allowedGifMimeTypes];
+const allowedVideoMimeTypes = [
+  'video/av01',
+  'video/3gpp',
+  'video/avc',
+  'video/hevc',
+  'video/x-matroska',
+  'video/mp2t',
+  'video/mp4',
+  'video/mp42',
+  'video/mp43',
+  'video/mp4v-es',
+  'video/mpeg',
+  'video/mpeg2',
+  'video/x-vnd.on2.vp8',
+  'video/x-vnd.on2.vp9',
+  'video/webm',
+];
+
+const allowedMimeTypes = [
+  ...allowedImageMimeTypes,
+  ...allowedGifMimeTypes,
+  ...allowedVideoMimeTypes,
+];
 
 const getMemeTypeFromMimeType = (mimeType: string): MEME_TYPE | undefined => {
-  switch (mimeType) {
-    case 'image/bmp':
-    case 'image/jpg':
-    case 'image/jpeg':
-    case 'image/png':
-    case 'image/webp': {
+  if (!allowedMimeTypes.includes(mimeType)) return undefined;
+
+  const mimeStart = mimeType.split('/')[0];
+
+  switch (mimeStart) {
+    case 'image': {
+      if (mimeType === 'image/gif') return MEME_TYPE.GIF;
       return MEME_TYPE.IMAGE;
     }
-    case 'image/gif': {
-      return MEME_TYPE.GIF;
+    case 'video': {
+      return MEME_TYPE.VIDEO;
     }
   }
 };
 
 const guessMimeTypeFromExtension = (filename: string): string | undefined => {
   const extension = filename.split('.').pop()?.toLowerCase();
-  switch (extension) {
-    case 'bmp': {
-      return 'image/bmp';
-    }
-    case 'jpg':
-    case 'jpeg': {
-      return 'image/jpeg';
-    }
-    case 'png': {
-      return 'image/png';
-    }
-    case 'webp': {
-      return 'image/webp';
-    }
-    case 'gif': {
-      return 'image/gif';
-    }
-  }
+  if (!extension) return undefined;
+  const guessedMimeType = lookup(extension);
+  if (!guessedMimeType) return undefined;
+  return guessedMimeType;
 };
 
 const guessMimeTypeFromMagicBytes = async (
@@ -66,10 +76,15 @@ const guessMimeType = async (
 ): Promise<string | undefined> => {
   if (hint && allowedMimeTypes.includes(hint)) return hint;
 
-  const guessedMimeType = guessMimeTypeFromExtension(uri);
-  if (guessedMimeType) return guessedMimeType;
+  let guessedMimeType = guessMimeTypeFromExtension(uri);
+  if (guessedMimeType && allowedMimeTypes.includes(guessedMimeType)) {
+    return guessedMimeType;
+  }
 
-  return await guessMimeTypeFromMagicBytes(uri);
+  guessedMimeType = await guessMimeTypeFromMagicBytes(uri);
+  if (guessedMimeType && allowedMimeTypes.includes(guessedMimeType)) {
+    return guessedMimeType;
+  }
 };
 
 export {