Merge pull request #13404 from wordpress-mobile/rnmobile/issue-1863-m…

…ultiple-uploads

[Gutenberg] Support Multiple uploads in Gallery

WordPress/Classes/ViewRelated/Gutenberg/Utils/GutenbergStockPhotos.swift

@@ -5,6 +5,7 @@ class GutenbergStockPhotos {
     private var mediaPickerCallback: MediaPickerDidPickMediaCallback?
     private let mediaInserter: GutenbergMediaInserterHelper
     private unowned var gutenberg: Gutenberg
+    private var multipleSelection = false
 
     init(gutenberg: Gutenberg, mediaInserter: GutenbergMediaInserterHelper) {
         self.mediaInserter = mediaInserter
@@ -19,10 +20,12 @@ class GutenbergStockPhotos {
         picker.delegate = self
         mediaPickerCallback = callback
         picker.presentPicker(origin: origin, blog: post.blog)
+        self.multipleSelection = multipleSelection
     }
 }
 
 extension GutenbergStockPhotos: StockPhotosPickerDelegate {
+
     func stockPhotosPicker(_ picker: StockPhotosPicker, didFinishPicking assets: [StockPhotosMedia]) {
         defer {
             mediaPickerCallback = nil
@@ -33,30 +36,40 @@ extension GutenbergStockPhotos: StockPhotosPickerDelegate {
             return
         }
 
+        // For blocks that support multiple uploads this will upload all images.
+        // If multiple uploads are not supported then it will seperate them out to Image Blocks.
+        multipleSelection ? insertOnBlock(with: assets) : insertSingleImages(assets)
+    }
+
+    /// Adds the given image object to the requesting block and seperates multiple images to seperate image blocks
+    /// - Parameter asset: Stock Media object to add.
+    func insertSingleImages(_ assets: [StockPhotosMedia]) {
         // Append the first item via callback given by Gutenberg.
         if let firstItem = assets.first {
-            insertOnBlock(with: firstItem)
+            insertOnBlock(with: [firstItem])
         }
         // Append the rest of images via `.appendMedia` event.
         // Ideally we would send all picked images via the given callback, but that seems to not be possible yet.
         appendOnNewBlocks(assets: assets.dropFirst())
     }
 
-    /// Adds the given image object to the requesting Image Block
-    /// - Parameter asset: Stock Media object to add.
-    func insertOnBlock(with asset: StockPhotosMedia) {
+    /// Adds the given images  to the requesting block
+    /// - Parameter assets: Stock Media objects to add.
+    func insertOnBlock(with assets: [StockPhotosMedia]) {
         guard let callback = mediaPickerCallback else {
             return assertionFailure("Image picked without callback")
         }
 
-        guard let media = self.mediaInserter.insert(exportableAsset: asset, source: .giphy) else {
-            callback([])
-            return
-        }
-        let mediaUploadID = media.gutenbergUploadID
-        callback([MediaInfo(id: mediaUploadID, url: asset.URL.absoluteString, type: media.mediaTypeString)])
-    }
+        let mediaInfo = assets.compactMap({ (asset) -> MediaInfo? in
+            guard let media = self.mediaInserter.insert(exportableAsset: asset, source: .giphy) else {
+                return nil
+            }
+            let mediaUploadID = media.gutenbergUploadID
+            return MediaInfo(id: mediaUploadID, url: asset.URL.absoluteString, type: media.mediaTypeString)
+        })
 
+        callback(mediaInfo)
+    }
 
     /// Create a new image block for each of the image objects in the slice.
     /// - Parameter assets: Stock Media objects to append.