Add support for HEIC uploads (#19618)

app/models/media_attachment.rb

@@ -44,7 +44,7 @@ class MediaAttachment < ApplicationRecord
   MAX_VIDEO_MATRIX_LIMIT = 2_304_000 # 1920x1200px
   MAX_VIDEO_FRAME_RATE   = 60
 
-  IMAGE_FILE_EXTENSIONS = %w(.jpg .jpeg .png .gif .webp).freeze
+  IMAGE_FILE_EXTENSIONS = %w(.jpg .jpeg .png .gif .webp .heic .heif).freeze
   VIDEO_FILE_EXTENSIONS = %w(.webm .mp4 .m4v .mov).freeze
   AUDIO_FILE_EXTENSIONS = %w(.ogg .oga .mp3 .wav .flac .opus .aac .m4a .3gp .wma).freeze
 
@@ -55,7 +55,8 @@ class MediaAttachment < ApplicationRecord
     small
   ).freeze
 
-  IMAGE_MIME_TYPES             = %w(image/jpeg image/png image/gif image/webp).freeze
+  IMAGE_MIME_TYPES             = %w(image/jpeg image/png image/gif image/heic image/heif image/webp).freeze
+  IMAGE_CONVERTIBLE_MIME_TYPES = %w(image/heic image/heif).freeze
   VIDEO_MIME_TYPES             = %w(video/webm video/mp4 video/quicktime video/ogg).freeze
   VIDEO_CONVERTIBLE_MIME_TYPES = %w(video/webm video/quicktime).freeze
   AUDIO_MIME_TYPES             = %w(audio/wave audio/wav audio/x-wav audio/x-pn-wave audio/vnd.wave audio/ogg audio/vorbis audio/mpeg audio/mp3 audio/webm audio/flac audio/aac audio/m4a audio/x-m4a audio/mp4 audio/3gpp video/x-ms-asf).freeze
@@ -78,6 +79,16 @@ class MediaAttachment < ApplicationRecord
     }.freeze,
   }.freeze
 
+  IMAGE_CONVERTED_STYLES = {
+    original: {
+      format: 'jpeg',
+    }.merge(IMAGE_STYLES[:original]).freeze,
+
+    small: {
+      format: 'jpeg',
+    }.merge(IMAGE_STYLES[:small]).freeze,
+  }.freeze
+
   VIDEO_FORMAT = {
     format: 'mp4',
     content_type: 'video/mp4',
@@ -277,6 +288,8 @@ class MediaAttachment < ApplicationRecord
     def file_styles(attachment)
       if attachment.instance.file_content_type == 'image/gif' || VIDEO_CONVERTIBLE_MIME_TYPES.include?(attachment.instance.file_content_type)
         VIDEO_CONVERTED_STYLES
+      elsif IMAGE_CONVERTIBLE_MIME_TYPES.include?(attachment.instance.file_content_type)
+        IMAGE_CONVERTED_STYLES
       elsif IMAGE_MIME_TYPES.include?(attachment.instance.file_content_type)
         IMAGE_STYLES
       elsif VIDEO_MIME_TYPES.include?(attachment.instance.file_content_type)