Description

Related to#1331

To be able to offer asnapshotDownloadWithProgress method, similar touploadFilesWithProgress the function called bysnapshotDownload should also have aWithProgress version.

Splitting thedownloadFileToCacheDir function

To avoid doing a big copy paste of thedownloadFileToCacheDir function, I needed to split it.

• CreatedtypeDownloadFileToCacheDirParams to avoid repeating the params everywhere
• CreatedfunctionpreparePaths to determine the paths based on the params
• CreatedfunctionensureDirectories to mkdir the directories
• CreatedfunctionprepareDownloadFileToCacheDir to handle all the functions above
• CreatedfunctiondownloadAndStoreFile to do the heavy logic of downloading sodownloadFileToCacheDir is simpler.

Those functions are exported, sodownloadFileToCacheDirWithProgress can nicely use them

Testing

• unit tests have been provided fordownloadFileToCacheDirWithProgress