observe_media_upload_props/3

Notification that a medium file has been uploaded. This is the moment to change properties, modify the file etc. The folded accumulator is the map with updated medium properties.

Type:

foldl

Return:

modified medium properties map

#media_upload_props{} properties:

• id: m_rsc:resource_id()|insert_rsc
• mime: binary
• archive_file: file:filename_all()|undefined
• options: list