Add the ability to paste images into the composer (#56)

src/view/com/composer/ComposePost.tsx

@@ -7,11 +7,14 @@ import {
   SafeAreaView,
   ScrollView,
   StyleSheet,
-  TextInput,
   TouchableOpacity,
   TouchableWithoutFeedback,
   View,
 } from 'react-native'
+import PasteInput, {
+  PastedFile,
+  PasteInputRef,
+} from '@mattermost/react-native-paste-input'
 import LinearGradient from 'react-native-linear-gradient'
 import {FontAwesomeIcon} from '@fortawesome/react-native-fontawesome'
 import {UserAutocompleteViewModel} from '../../../state/models/user-autocomplete-view'
@@ -33,7 +36,7 @@ import {detectLinkables, extractEntities} from '../../../lib/strings'
 import {getLinkMeta} from '../../../lib/link-meta'
 import {downloadAndResize} from '../../../lib/images'
 import {UserLocalPhotosModel} from '../../../state/models/user-local-photos'
-import {PhotoCarouselPicker} from './PhotoCarouselPicker'
+import {PhotoCarouselPicker, cropPhoto} from './PhotoCarouselPicker'
 import {SelectedPhoto} from './SelectedPhoto'
 import {usePalette} from '../../lib/hooks/usePalette'
 
@@ -54,7 +57,7 @@ export const ComposePost = observer(function ComposePost({
 }) {
   const pal = usePalette('default')
   const store = useStores()
-  const textInput = useRef<TextInput>(null)
+  const textInput = useRef<PasteInputRef>(null)
   const [isProcessing, setIsProcessing] = useState(false)
   const [processingState, setProcessingState] = useState('')
   const [error, setError] = useState('')
@@ -78,6 +81,16 @@ export const ComposePost = observer(function ComposePost({
     [store],
   )
 
+  // HACK
+  // there's a bug with @mattermost/react-native-paste-input where if the input
+  // is focused during unmount, an exception will throw (seems that a blur method isnt implemented)
+  // manually blurring before closing gets around that
+  // -prf
+  const hackfixOnClose = () => {
+    textInput.current?.blur()
+    onClose()
+  }
+
   // initial setup
   useEffect(() => {
     autocompleteView.setup()
@@ -134,7 +147,8 @@ export const ComposePost = observer(function ComposePost({
         isLoading: false, // done
       })
     }
-  }, [extLink])
+    return cleanup
+  }, [store, extLink])
 
   useEffect(() => {
     // HACK
@@ -196,9 +210,21 @@ export const ComposePost = observer(function ComposePost({
       }
     }
   }
-  const onPressCancel = () => {
-    onClose()
+  const onPaste = async (err: string | undefined, files: PastedFile[]) => {
+    if (err) {
+      return setError(err)
+    }
+    if (selectedPhotos.length >= 4) {
+      return
+    }
+    const imgFile = files.find(file => /\.(jpe?g|png)$/.test(file.fileName))
+    if (!imgFile) {
+      return
+    }
+    const finalImgPath = await cropPhoto(imgFile.uri)
+    onSelectPhotos([...selectedPhotos, finalImgPath])
   }
+  const onPressCancel = () => hackfixOnClose()
   const onPressPublish = async () => {
     if (isProcessing) {
       return
@@ -229,7 +255,7 @@ export const ComposePost = observer(function ComposePost({
     }
     store.me.mainFeed.loadLatest()
     onPost?.()
-    onClose()
+    hackfixOnClose()
     Toast.show(`Your ${replyTo ? 'reply' : 'post'} has been published`)
   }
   const onSelectAutocompleteItem = (item: string) => {
@@ -254,7 +280,11 @@ export const ComposePost = observer(function ComposePost({
     let i = 0
     return detectLinkables(text).map(v => {
       if (typeof v === 'string') {
-        return v
+        return (
+          <Text key={i++} style={styles.textInputFormatting}>
+            {v}
+          </Text>
+        )
       } else {
         return (
           <Text key={i++} style={[pal.link, styles.textInputFormatting]}>
@@ -263,7 +293,7 @@ export const ComposePost = observer(function ComposePost({
         )
       }
     })
-  }, [text])
+  }, [text, pal.link])
 
   return (
     <KeyboardAvoidingView
@@ -354,12 +384,13 @@ export const ComposePost = observer(function ComposePost({
                 avatar={store.me.avatar}
                 size={50}
               />
-              <TextInput
+              <PasteInput
                 testID="composerTextInput"
                 ref={textInput}
                 multiline
                 scrollEnabled
                 onChangeText={(text: string) => onChangeText(text)}
+                onPaste={onPaste}
                 placeholder={selectTextInputPlaceholder}
                 placeholderTextColor={pal.colors.textLight}
                 style={[
@@ -368,7 +399,7 @@ export const ComposePost = observer(function ComposePost({
                   styles.textInputFormatting,
                 ]}>
                 {textDecorated}
-              </TextInput>
+              </PasteInput>
             </View>
             <SelectedPhoto
               selectedPhotos={selectedPhotos}

src/view/com/composer/PhotoCarouselPicker.tsx

@@ -26,6 +26,28 @@ const IMAGE_PARAMS = {
   compressImageQuality: 1.0,
 }
 
+export async function cropPhoto(
+  path: string,
+  imgWidth = MAX_WIDTH,
+  imgHeight = MAX_HEIGHT,
+) {
+  // choose target dimensions based on the original
+  // this causes the photo cropper to start with the full image "selected"
+  const {width, height} = scaleDownDimensions(
+    {width: imgWidth, height: imgHeight},
+    {width: MAX_WIDTH, height: MAX_HEIGHT},
+  )
+  const cropperRes = await openCropper({
+    mediaType: 'photo',
+    path,
+    ...IMAGE_PARAMS,
+    width,
+    height,
+  })
+  const img = await compressIfNeeded(cropperRes, MAX_SIZE)
+  return img.path
+}
+
 export const PhotoCarouselPicker = ({
   selectedPhotos,
   onSelectPhotos,
@@ -55,21 +77,12 @@ export const PhotoCarouselPicker = ({
   const handleSelectPhoto = useCallback(
     async (item: PhotoIdentifier) => {
       try {
-        // choose target dimensions based on the original
-        // this causes the photo cropper to start with the full image "selected"
-        const {width, height} = scaleDownDimensions(
-          {width: item.node.image.width, height: item.node.image.height},
-          {width: MAX_WIDTH, height: MAX_HEIGHT},
+        const imgPath = await cropPhoto(
+          item.node.image.uri,
+          item.node.image.width,
+          item.node.image.height,
         )
-        const cropperRes = await openCropper({
-          mediaType: 'photo',
-          path: item.node.image.uri,
-          ...IMAGE_PARAMS,
-          width,
-          height,
-        })
-        const img = await compressIfNeeded(cropperRes, MAX_SIZE)
-        onSelectPhotos([...selectedPhotos, img.path])
+        onSelectPhotos([...selectedPhotos, imgPath])
       } catch (err: any) {
         // ignore
         store.log.warn('Error selecting photo', err)