From b83407f1f45bc9a0def370ddb94b83beec3c3323 Mon Sep 17 00:00:00 2001
From: Nikolaos Karaolidis <nick@karaolidis.com>
Date: Tue, 1 Aug 2023 14:35:10 +0300
Subject: [PATCH] Add video support

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>
---
 android/app/src/main/AndroidManifest.xml      |  30 +++++
 src/components/memes/memeEditor.tsx           | 116 +++++++++++-------
 src/components/memes/memeViewItem.tsx         |  52 +++++---
 .../memes/memesList/memesGridItem.tsx         |  43 +++++--
 .../memes/memesList/memesListItem.tsx         |  23 +++-
 .../memes/memesList/memesMasonryItem.tsx      |  53 +++++---
 src/hooks/index.ts                            |   1 +
 src/hooks/useMemeDimensions.ts                |  56 +++++++++
 src/screens/memeView.tsx                      |  44 ++++---
 src/screens/memes.tsx                         |  12 +-
 src/screens/tags.tsx                          |  10 +-
 src/types/dimensions.ts                       |   1 +
 src/utilities/filesystem.ts                   |  75 ++++++-----
 13 files changed, 358 insertions(+), 158 deletions(-)
 create mode 100644 src/hooks/index.ts
 create mode 100644 src/hooks/useMemeDimensions.ts

diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index cb64fb0..2df2526 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -28,6 +28,21 @@
           <data android:mimeType="image/png" />
           <data android:mimeType="image/webp" />
           <data android:mimeType="image/gif" />
+          <data android:mimeType="video/av01" />
+          <data android:mimeType="video/3gpp" />
+          <data android:mimeType="video/avc" />
+          <data android:mimeType="video/hevc" />
+          <data android:mimeType="video/x-matroska" />
+          <data android:mimeType="video/mp2t" />
+          <data android:mimeType="video/mp4" />
+          <data android:mimeType="video/mp42" />
+          <data android:mimeType="video/mp43" />
+          <data android:mimeType="video/mp4v-es" />
+          <data android:mimeType="video/mpeg" />
+          <data android:mimeType="video/mpeg2" />
+          <data android:mimeType="video/x-vnd.on2.vp8" />
+          <data android:mimeType="video/x-vnd.on2.vp9" />
+          <data android:mimeType="video/webm" />
         </intent-filter>
         <intent-filter>
           <action android:name="android.intent.action.SEND_MULTIPLE" />
@@ -37,6 +52,21 @@
           <data android:mimeType="image/png" />
           <data android:mimeType="image/webp" />
           <data android:mimeType="image/gif" />
+          <data android:mimeType="video/av01" />
+          <data android:mimeType="video/3gpp" />
+          <data android:mimeType="video/avc" />
+          <data android:mimeType="video/hevc" />
+          <data android:mimeType="video/x-matroska" />
+          <data android:mimeType="video/mp2t" />
+          <data android:mimeType="video/mp4" />
+          <data android:mimeType="video/mp42" />
+          <data android:mimeType="video/mp43" />
+          <data android:mimeType="video/mp4v-es" />
+          <data android:mimeType="video/mpeg" />
+          <data android:mimeType="video/mpeg2" />
+          <data android:mimeType="video/x-vnd.on2.vp8" />
+          <data android:mimeType="video/x-vnd.on2.vp9" />
+          <data android:mimeType="video/webm" />
         </intent-filter>
       </activity>
     </application>
diff --git a/src/components/memes/memeEditor.tsx b/src/components/memes/memeEditor.tsx
index 5bbeca6..7e36d63 100644
--- a/src/components/memes/memeEditor.tsx
+++ b/src/components/memes/memeEditor.tsx
@@ -1,13 +1,20 @@
-import React, { useState } from 'react';
+import React, { useMemo } from 'react';
 import { HelperText, Text, TextInput, useTheme } from 'react-native-paper';
 import { Image, LayoutAnimation } from 'react-native';
 import { useSafeAreaFrame } from 'react-native-safe-area-context';
 import { LoadingView, MemeFail, MemeTagSelector } from '..';
-import { getFilenameFromUri, validateMemeTitle } from '../../utilities';
-import { Dimensions, StagingMeme } from '../../types';
+import {
+  getFilenameFromUri,
+  getMemeTypeFromMimeType,
+  validateMemeTitle,
+} from '../../utilities';
+import { StagingMeme } from '../../types';
+import { useMemeDimensions } from '../../hooks';
+import { MEME_TYPE } from '../../database';
+import Video from 'react-native-video';
 
 const memeEditorStyles = {
-  image: {
+  media: {
     marginBottom: 15,
     borderRadius: 5,
   },
@@ -26,6 +33,7 @@ const memeEditorStyles = {
 const MemeEditor = ({
   uri,
   mimeType,
+  loading,
   setLoading,
   error,
   setError,
@@ -44,7 +52,59 @@ const MemeEditor = ({
   const { width } = useSafeAreaFrame();
   const { colors } = useTheme();
 
-  const [dimensions, setDimensions] = useState<Dimensions>();
+  const { dimensions } = useMemeDimensions(
+    uri,
+    mimeType,
+    useMemo(
+      () => () => {
+        setLoading(false);
+        LayoutAnimation.configureNext(LayoutAnimation.Presets.easeInEaseOut);
+      },
+      [setLoading],
+    ),
+    useMemo(() => (errorIn: Error) => setError(errorIn), [setError]),
+  );
+
+  const mediaComponent = useMemo(() => {
+    if (!mimeType || !dimensions) return <></>;
+
+    const dimensionStyles = {
+      width: width * 0.92,
+      height: Math.max(
+        Math.min((width * 0.92) / dimensions.aspectRatio, 500),
+        100,
+      ),
+    };
+
+    const memeType = getMemeTypeFromMimeType(mimeType);
+    if (!memeType) return <></>;
+
+    switch (memeType) {
+      case MEME_TYPE.IMAGE:
+      case MEME_TYPE.GIF: {
+        return (
+          <Image
+            source={{ uri }}
+            style={[memeEditorStyles.media, dimensionStyles]}
+            resizeMode="contain"
+          />
+        );
+      }
+      case MEME_TYPE.VIDEO: {
+        return (
+          <Video
+            source={{ uri }}
+            style={[memeEditorStyles.media, dimensionStyles]}
+            resizeMode="contain"
+            controls
+          />
+        );
+      }
+      default: {
+        return <></>;
+      }
+    }
+  }, [dimensions, mimeType, uri, width]);
 
   if (!uri || !mimeType || !staging) return <LoadingView />;
 
@@ -70,51 +130,15 @@ const MemeEditor = ({
               width: width * 0.92,
               height: width * 0.92,
             },
-            memeEditorStyles.image,
+            memeEditorStyles.media,
           ]}
           iconSize={50}
         />
+      ) : // eslint-disable-next-line unicorn/no-nested-ternary
+      loading || !dimensions ? (
+        <></>
       ) : (
-        <Image
-          source={{ uri }}
-          style={[
-            dimensions
-              ? {
-                  width: width * 0.92,
-                  height: Math.max(
-                    Math.min(
-                      ((width * 0.92) / dimensions.width) * dimensions.height,
-                      500,
-                    ),
-                    100,
-                  ),
-                }
-              : // eslint-disable-next-line react-native/no-inline-styles
-                {
-                  width: width * 0.92,
-                  height: 1,
-                },
-            memeEditorStyles.image,
-          ]}
-          resizeMode="contain"
-          onLoad={event => {
-            setDimensions({
-              width: event.nativeEvent.source.width,
-              height: event.nativeEvent.source.height,
-            });
-            setLoading(false);
-            LayoutAnimation.configureNext(
-              LayoutAnimation.Presets.easeInEaseOut,
-            );
-          }}
-          onError={() =>
-            setError(
-              new Error(
-                'The URI for this meme appears to be broken. This may have been caused by the file being moved or deleted.',
-              ),
-            )
-          }
-        />
+        mediaComponent
       )}
       <Text
         variant="bodySmall"
diff --git a/src/components/memes/memeViewItem.tsx b/src/components/memes/memeViewItem.tsx
index 0c9eb16..ed14038 100644
--- a/src/components/memes/memeViewItem.tsx
+++ b/src/components/memes/memeViewItem.tsx
@@ -1,12 +1,13 @@
-import React from 'react';
+import React, { useMemo } from 'react';
 import { StyleSheet, View } from 'react-native';
 import { useSafeAreaFrame } from 'react-native-safe-area-context';
-import { useImageDimensions } from '@react-native-community/hooks';
 import { AndroidScoped } from 'react-native-file-access';
 import { useSelector } from 'react-redux';
-import { Meme } from '../../database';
+import { MEME_TYPE, Meme } from '../../database';
 import { RootState } from '../../state';
 import { AnimatedImage, LoadingView, MemeFail } from '..';
+import { useMemeDimensions } from '../../hooks';
+import Video from 'react-native-video';
 
 const memeViewItemStyles = StyleSheet.create({
   view: {
@@ -24,7 +25,34 @@ const MemeViewItem = ({ meme }: { meme: Meme }) => {
 
   const uri = AndroidScoped.appendPath(storageUri, meme.filename);
 
-  const { dimensions, loading, error } = useImageDimensions({ uri });
+  const { dimensions, loading, error } = useMemeDimensions(uri, meme.mimeType);
+
+  const mediaComponent = useMemo(() => {
+    if (!dimensions) return <></>;
+
+    const dimensionStyles =
+      dimensions.aspectRatio > width / (height - 128)
+        ? {
+            width,
+            height: width / (dimensions.width / dimensions.height),
+          }
+        : {
+            width: (height - 128) * (dimensions.width / dimensions.height),
+            height: height - 128,
+          };
+
+    switch (meme.memeType) {
+      case MEME_TYPE.IMAGE:
+      case MEME_TYPE.GIF: {
+        return <AnimatedImage source={{ uri }} style={dimensionStyles} />;
+      }
+      default: {
+        return (
+          <Video source={{ uri }} style={dimensionStyles} paused controls />
+        );
+      }
+    }
+  }, [dimensions, height, meme.memeType, uri, width]);
 
   if (!error && (loading || !dimensions)) {
     return <LoadingView style={{ width, height }} />;
@@ -41,21 +69,7 @@ const MemeViewItem = ({ meme }: { meme: Meme }) => {
           iconSize={50}
         />
       ) : (
-        <AnimatedImage
-          source={{ uri }}
-          style={
-            dimensions.aspectRatio > width / (height - 128)
-              ? {
-                  width,
-                  height: width / (dimensions.width / dimensions.height),
-                }
-              : {
-                  width:
-                    (height - 128) * (dimensions.width / dimensions.height),
-                  height: height - 128,
-                }
-          }
-        />
+        mediaComponent
       )}
     </View>
   );
diff --git a/src/components/memes/memesList/memesGridItem.tsx b/src/components/memes/memesList/memesGridItem.tsx
index 4f6e1df..da62b64 100644
--- a/src/components/memes/memesList/memesGridItem.tsx
+++ b/src/components/memes/memesList/memesGridItem.tsx
@@ -1,13 +1,13 @@
-import React from 'react';
+import React, { useMemo } from 'react';
 import { Image, TouchableHighlight } from 'react-native';
 import { useSelector } from 'react-redux';
 import { useSafeAreaFrame } from 'react-native-safe-area-context';
-import { useImageDimensions } from '@react-native-community/hooks';
 import { AndroidScoped } from 'react-native-file-access';
-import { Meme } from '../../../database';
+import { MEME_TYPE, Meme } from '../../../database';
 import { RootState } from '../../../state';
 import { MemeFail } from '..';
 import { getFontAwesome5IconSize } from '../../../utilities';
+import { useMemeDimensions } from '../../../hooks';
 
 const MemesGridItem = ({
   meme,
@@ -29,7 +29,32 @@ const MemesGridItem = ({
 
   const uri = AndroidScoped.appendPath(storageUri, meme.filename);
 
-  const { dimensions, loading, error } = useImageDimensions({ uri });
+  const { dimensions, loading, error } = useMemeDimensions(uri, meme.mimeType);
+
+  const itemWidth = (width * 0.92 - 5) / gridColumns;
+
+  const mediaComponent = useMemo(() => {
+    switch (meme.memeType) {
+      case MEME_TYPE.IMAGE:
+      case MEME_TYPE.GIF:
+      case MEME_TYPE.VIDEO: {
+        return (
+          <Image
+            source={{ uri }}
+            style={[
+              {
+                width: itemWidth,
+                height: itemWidth,
+              },
+            ]}
+          />
+        );
+      }
+      default: {
+        return <></>;
+      }
+    }
+  }, [itemWidth, meme.memeType, uri]);
 
   if (!error && (loading || !dimensions)) return <></>;
 
@@ -44,15 +69,7 @@ const MemesGridItem = ({
           iconSize={getFontAwesome5IconSize(gridColumns)}
         />
       ) : (
-        <Image
-          source={{ uri }}
-          style={[
-            {
-              width: (width * 0.92 - 5) / gridColumns,
-              height: (width * 0.92 - 5) / gridColumns,
-            },
-          ]}
-        />
+        mediaComponent
       )}
     </TouchableHighlight>
   );
diff --git a/src/components/memes/memesList/memesListItem.tsx b/src/components/memes/memesList/memesListItem.tsx
index cdc2a86..f4f588b 100644
--- a/src/components/memes/memesList/memesListItem.tsx
+++ b/src/components/memes/memesList/memesListItem.tsx
@@ -1,13 +1,13 @@
-import React from 'react';
+import React, { useMemo } from 'react';
 import { Image, StyleSheet, View } from 'react-native';
 import { Text, TouchableRipple } from 'react-native-paper';
 import { useSafeAreaFrame } from 'react-native-safe-area-context';
-import { useImageDimensions } from '@react-native-community/hooks';
 import { AndroidScoped } from 'react-native-file-access';
 import { useSelector } from 'react-redux';
-import { Meme } from '../../../database';
+import { MEME_TYPE, Meme } from '../../../database';
 import { MemeFail } from '..';
 import { RootState } from '../../../state';
+import { useMemeDimensions } from '../../../hooks';
 
 const memesListItemStyles = StyleSheet.create({
   view: {
@@ -50,7 +50,20 @@ const MemesListItem = ({
 
   const uri = AndroidScoped.appendPath(storageUri, meme.filename);
 
-  const { dimensions, loading, error } = useImageDimensions({ uri });
+  const { dimensions, loading, error } = useMemeDimensions(uri, meme.mimeType);
+
+  const mediaComponent = useMemo(() => {
+    switch (meme.memeType) {
+      case MEME_TYPE.IMAGE:
+      case MEME_TYPE.GIF:
+      case MEME_TYPE.VIDEO: {
+        return <Image source={{ uri }} style={[memesListItemStyles.image]} />;
+      }
+      default: {
+        return <></>;
+      }
+    }
+  }, [meme.memeType, uri]);
 
   if (!error && (loading || !dimensions)) return <></>;
 
@@ -62,7 +75,7 @@ const MemesListItem = ({
         {error ? (
           <MemeFail style={memesListItemStyles.image} />
         ) : (
-          <Image source={{ uri }} style={memesListItemStyles.image} />
+          mediaComponent
         )}
         <View
           style={[
diff --git a/src/components/memes/memesList/memesMasonryItem.tsx b/src/components/memes/memesList/memesMasonryItem.tsx
index b502b6d..3962548 100644
--- a/src/components/memes/memesList/memesMasonryItem.tsx
+++ b/src/components/memes/memesList/memesMasonryItem.tsx
@@ -1,13 +1,13 @@
-import React from 'react';
+import React, { useMemo } from 'react';
 import { Image, StyleSheet, TouchableHighlight } from 'react-native';
 import { useSelector } from 'react-redux';
 import { useSafeAreaFrame } from 'react-native-safe-area-context';
 import { AndroidScoped } from 'react-native-file-access';
-import { useImageDimensions } from '@react-native-community/hooks';
-import { Meme } from '../../../database';
+import { MEME_TYPE, Meme } from '../../../database';
 import { RootState } from '../../../state';
 import { MemeFail } from '..';
 import { getFontAwesome5IconSize } from '../../../utilities';
+import { useMemeDimensions } from '../../../hooks';
 
 const memeMasonryItemStyles = StyleSheet.create({
   view: {
@@ -39,7 +39,35 @@ const MemesMasonryItem = ({
 
   const uri = AndroidScoped.appendPath(storageUri, meme.filename);
 
-  const { dimensions, loading, error } = useImageDimensions({ uri });
+  const { dimensions, loading, error } = useMemeDimensions(uri, meme.mimeType);
+
+  const itemWidth = (width * 0.92 - 5) / masonryColumns - 5;
+  const itemHeight =
+    ((width * 0.92) / masonryColumns - 5) / (dimensions?.aspectRatio ?? 1);
+
+  const mediaComponent = useMemo(() => {
+    switch (meme.memeType) {
+      case MEME_TYPE.IMAGE:
+      case MEME_TYPE.GIF:
+      case MEME_TYPE.VIDEO: {
+        return (
+          <Image
+            source={{ uri }}
+            style={[
+              memeMasonryItemStyles.image,
+              {
+                width: itemWidth,
+                height: itemHeight,
+              },
+            ]}
+          />
+        );
+      }
+      default: {
+        return <></>;
+      }
+    }
+  }, [itemHeight, itemWidth, meme.memeType, uri]);
 
   if (!error && (loading || !dimensions)) return <></>;
 
@@ -51,25 +79,12 @@ const MemesMasonryItem = ({
         <MemeFail
           style={[
             memeMasonryItemStyles.image,
-            {
-              width: (width * 0.92) / masonryColumns - 5,
-              height: (width * 0.92) / masonryColumns - 5,
-            },
+            { width: itemWidth, height: itemHeight },
           ]}
           iconSize={getFontAwesome5IconSize(masonryColumns)}
         />
       ) : (
-        <Image
-          source={{ uri }}
-          style={[
-            memeMasonryItemStyles.image,
-            {
-              width: (width * 0.92) / masonryColumns - 5,
-              height:
-                ((width * 0.92) / masonryColumns - 5) / dimensions.aspectRatio,
-            },
-          ]}
-        />
+        mediaComponent
       )}
     </TouchableHighlight>
   );
diff --git a/src/hooks/index.ts b/src/hooks/index.ts
new file mode 100644
index 0000000..21f6042
--- /dev/null
+++ b/src/hooks/index.ts
@@ -0,0 +1 @@
+export { default as useMemeDimensions } from './useMemeDimensions';
diff --git a/src/hooks/useMemeDimensions.ts b/src/hooks/useMemeDimensions.ts
new file mode 100644
index 0000000..5f12eb0
--- /dev/null
+++ b/src/hooks/useMemeDimensions.ts
@@ -0,0 +1,56 @@
+import { useEffect, useState } from 'react';
+import { Image } from 'react-native';
+import { Dimensions } from '../types';
+
+const useMediaDimensions = (
+  uri?: string,
+  mimeType?: string,
+  onLoad?: (width: number, height: number, aspectRatio: number) => void,
+  onError?: (error: Error) => void,
+) => {
+  const [dimensions, setDimensions] = useState<Dimensions | undefined>();
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<Error | undefined>();
+
+  useEffect(() => {
+    const getDimensions = () => {
+      if (!uri || !mimeType) return;
+
+      const mimeStart = mimeType.split('/')[0];
+
+      switch (mimeStart) {
+        case 'image':
+        case 'video': {
+          Image.getSize(
+            uri,
+            (width, height) => {
+              const aspectRatio = width / height;
+              setDimensions({ width, height, aspectRatio });
+              setLoading(false);
+              onLoad?.(width, height, aspectRatio);
+            },
+            (errorIn: string) => {
+              const errorOut = new Error(errorIn);
+              setError(errorOut);
+              setLoading(false);
+              onError?.(errorOut);
+            },
+          );
+          break;
+        }
+        default: {
+          const errorOut = new Error(`Unknown mime type: ${mimeType}`);
+          setError(errorOut);
+          setLoading(false);
+          onError?.(errorOut);
+        }
+      }
+    };
+
+    getDimensions();
+  }, [mimeType, onError, onLoad, uri]);
+
+  return { dimensions, loading, error };
+};
+
+export default useMediaDimensions;
diff --git a/src/screens/memeView.tsx b/src/screens/memeView.tsx
index 812f1d4..4f9568b 100644
--- a/src/screens/memeView.tsx
+++ b/src/screens/memeView.tsx
@@ -6,7 +6,13 @@ import { FlashList } from '@shopify/flash-list';
 import { Appbar, Portal, Snackbar } from 'react-native-paper';
 import { useSafeAreaFrame } from 'react-native-safe-area-context';
 import { NavigationProp, useNavigation } from '@react-navigation/native';
-import { RootStackParamList, ROUTE } from '../types';
+import { useSelector } from 'react-redux';
+import {
+  memesSortQuery,
+  RootStackParamList,
+  ROUTE,
+  SORT_DIRECTION,
+} from '../types';
 import { Meme } from '../database';
 import { LoadingView, MemeViewItem } from '../components';
 import {
@@ -17,7 +23,6 @@ import {
   multipleIdQuery,
   shareMeme,
 } from '../utilities';
-import { useSelector } from 'react-redux';
 import { RootState } from '../state';
 
 const memeViewStyles = StyleSheet.create({
@@ -50,6 +55,10 @@ const MemeView = ({
 }: NativeStackScreenProps<RootStackParamList, ROUTE.MEME_VIEW>) => {
   const { height, width } = useSafeAreaFrame();
   const navigation = useNavigation<NavigationProp<RootStackParamList>>();
+  const sort = useSelector((state: RootState) => state.memes.sort);
+  const sortDirection = useSelector(
+    (state: RootState) => state.memes.sortDirection,
+  );
   // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
   const storageUri = useSelector(
     (state: RootState) => state.settings.storageUri,
@@ -61,15 +70,20 @@ const MemeView = ({
 
   const flashListRef = useRef<FlashList<Meme>>(null);
 
-  const [index, setIndex] = useState(route.params.index);
+  const index = useRef(route.params.index);
   const memes = useQuery<Meme>(Meme.schema.name, collectionIn => {
-    return collectionIn.filtered(multipleIdQuery(route.params.ids));
+    return collectionIn
+      .filtered(multipleIdQuery(route.params.ids))
+      .sorted(
+        memesSortQuery(sort),
+        sortDirection === SORT_DIRECTION.DESCENDING,
+      );
   });
 
   useEffect(() => {
     if (memes.length === 0) navigation.goBack();
-    if (index >= memes.length) {
-      setIndex(memes.length - 1);
+    if (index.current >= memes.length) {
+      index.current = memes.length - 1;
       flashListRef.current?.scrollToIndex({ index: memes.length - 1 });
     }
   }, [index, memes.length, navigation]);
@@ -79,19 +93,19 @@ const MemeView = ({
       <Appbar.Header style={memeViewStyles.header}>
         <Appbar.BackAction onPress={() => navigation.goBack()} />
         {/* eslint-disable-next-line @typescript-eslint/no-unnecessary-condition */}
-        <Appbar.Content title={memes[index]?.title} />
+        <Appbar.Content title={memes[index.current]?.title} />
       </Appbar.Header>
       <FlashList
         ref={flashListRef}
         key={height}
         data={memes}
-        initialScrollIndex={index}
+        initialScrollIndex={index.current}
         onScroll={event => {
           const newIndex = Math.round(
             event.nativeEvent.contentOffset.x /
               event.nativeEvent.layoutMeasurement.width,
           );
-          if (newIndex !== index) setIndex(newIndex);
+          if (newIndex !== index.current) index.current = newIndex;
         }}
         estimatedItemSize={width}
         estimatedListSize={{ height, width }}
@@ -111,14 +125,14 @@ const MemeView = ({
       <Appbar style={memeViewStyles.footer}>
         <Appbar.Action
           // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
-          icon={memes[index]?.isFavorite ? 'heart' : 'heart-outline'}
-          onPress={() => favoriteMeme(realm, memes[index])}
+          icon={memes[index.current]?.isFavorite ? 'heart' : 'heart-outline'}
+          onPress={() => favoriteMeme(realm, memes[index.current])}
           disabled={isBlocked}
         />
         <Appbar.Action
           icon="share"
           onPress={() => {
-            shareMeme(realm, storageUri, memes[index]).catch(() =>
+            shareMeme(realm, storageUri, memes[index.current]).catch(() =>
               setSnackbarMessage('Failed to share meme!'),
             );
           }}
@@ -127,7 +141,7 @@ const MemeView = ({
         <Appbar.Action
           icon="content-copy"
           onPress={async () => {
-            await copyMeme(realm, storageUri, memes[index])
+            await copyMeme(realm, storageUri, memes[index.current])
               .then(() => setSnackbarMessage('Meme copied!'))
               .catch(() => setSnackbarMessage('Failed to copy meme!'));
           }}
@@ -136,7 +150,7 @@ const MemeView = ({
         <Appbar.Action
           icon="pencil"
           onPress={() => {
-            editMeme(navigation, memes[index]);
+            editMeme(navigation, memes[index.current]);
           }}
           disabled={isBlocked}
         />
@@ -144,7 +158,7 @@ const MemeView = ({
           icon="delete"
           onPress={async () => {
             setIsBlocked(true);
-            await deleteMeme(realm, storageUri, memes[index]);
+            await deleteMeme(realm, storageUri, memes[index.current]);
             setIsBlocked(false);
           }}
           disabled={isBlocked}
diff --git a/src/screens/memes.tsx b/src/screens/memes.tsx
index 73c3ae8..db0aefc 100644
--- a/src/screens/memes.tsx
+++ b/src/screens/memes.tsx
@@ -98,7 +98,7 @@ const Memes = () => {
     [sort, sortDirection, favoritesOnly, filter, search],
   );
 
-  const [scrollOffset, setScrollOffset] = useState(0);
+  const previousOffset = useRef(0);
 
   const handleScroll = (event: NativeSyntheticEvent<NativeScrollEvent>) => {
     const currentOffset = event.nativeEvent.contentOffset.y;
@@ -106,13 +106,13 @@ const Memes = () => {
     if (currentOffset <= 150) {
       dispatch(setNavVisible(true));
     } else {
-      const diff = currentOffset - scrollOffset;
-      if (Math.abs(diff) > 50) {
+      const diff = currentOffset - previousOffset.current;
+      if (Math.abs(diff) > 35) {
         dispatch(setNavVisible(diff < 0));
       }
     }
 
-    setScrollOffset(currentOffset);
+    previousOffset.current = currentOffset;
   };
 
   const flashListRef = useRef<FlashList<Meme>>(null);
@@ -120,7 +120,7 @@ const Memes = () => {
   useFocusEffect(
     useCallback(() => {
       const handleBackPress = () => {
-        if (scrollOffset <= 0) return false;
+        if (previousOffset.current <= 0) return false;
         flashListRef.current?.scrollToOffset({ offset: 0, animated: true });
         return true;
       };
@@ -129,7 +129,7 @@ const Memes = () => {
 
       return () =>
         BackHandler.removeEventListener('hardwareBackPress', handleBackPress);
-    }, [scrollOffset]),
+    }, []),
   );
 
   useFocusEffect(
diff --git a/src/screens/tags.tsx b/src/screens/tags.tsx
index 46aa9b9..b18a00c 100644
--- a/src/screens/tags.tsx
+++ b/src/screens/tags.tsx
@@ -71,7 +71,7 @@ const Tags = () => {
     [search, sort, sortDirection],
   );
 
-  const [scrollOffset, setScrollOffset] = useState(0);
+  const previousOffset = useRef(0);
 
   const handleScroll = (event: NativeSyntheticEvent<NativeScrollEvent>) => {
     const currentOffset = event.nativeEvent.contentOffset.y;
@@ -79,11 +79,11 @@ const Tags = () => {
     if (currentOffset <= 150) {
       dispatch(setNavVisible(true));
     } else {
-      const diff = currentOffset - scrollOffset;
+      const diff = currentOffset - previousOffset.current;
       if (Math.abs(diff) > 50) dispatch(setNavVisible(diff < 0));
     }
 
-    setScrollOffset(currentOffset);
+    previousOffset.current = currentOffset;
   };
 
   const flashListRef = useRef<FlashList<Tag>>(null);
@@ -91,7 +91,7 @@ const Tags = () => {
   useFocusEffect(
     useCallback(() => {
       const handleBackPress = () => {
-        if (scrollOffset > 0) {
+        if (previousOffset.current > 0) {
           flashListRef.current?.scrollToOffset({ offset: 0, animated: true });
           return true;
         }
@@ -102,7 +102,7 @@ const Tags = () => {
 
       return () =>
         BackHandler.removeEventListener('hardwareBackPress', handleBackPress);
-    }, [scrollOffset]),
+    }, []),
   );
 
   useFocusEffect(
diff --git a/src/types/dimensions.ts b/src/types/dimensions.ts
index 1992449..e1c7cf3 100644
--- a/src/types/dimensions.ts
+++ b/src/types/dimensions.ts
@@ -1,6 +1,7 @@
 interface Dimensions {
   width: number;
   height: number;
+  aspectRatio: number;
 }
 
 export { type Dimensions };
diff --git a/src/utilities/filesystem.ts b/src/utilities/filesystem.ts
index 1c06270..09e4ea8 100644
--- a/src/utilities/filesystem.ts
+++ b/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 {