EDD-39: Fixes timers when downloads are paused

[macrouch]

Overview

What is the feature?

Adjusts timer logic to be able to show more accurate timers when downloads have been paused and resumed downloading. Added a warning for users when quitting the application that any in-progress files will be lost if they close the application.

What is the Solution?

Added a pauses table to the database. Any time a download or a file is paused/interrupted a new row is created in that table with a timeStart. When the download/file is resumed a timeEnd is added. The sum of those rows is used when calculating the time we want to display in the download/files reports

What areas of the application does this impact?

Downloads:

• Elapsed time of each download item Files:
• Header - Elapsed time of download and remaining time of download
• Remaining time of each file

Testing

Run a download, pause the download and ensure the timers stop incrementing. Resume the download and ensure the timers pick up where they left off, without a large jump in the time displayed

Checklist

• [x] I have added automated tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have bumped the version field in package.json and ran npm install

[codecov[bot]]

Codecov Report

Merging #23 (573cfc7) into main (eeb5d88) will increase coverage by 0.31%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #23      +/-   ##
==========================================
+ Coverage   92.04%   92.36%   +0.31%     
==========================================
  Files          94       96       +2     
  Lines        1735     1807      +72     
  Branches      400      402       +2     
==========================================
+ Hits         1597     1669      +72     
  Misses        138      138              

Files Changed	Coverage Δ
src/app/components/DownloadItem/DownloadItem.jsx	92.00% <ø> (ø)
.../DownloadListItem/DownloadListItemFileProgress.jsx	100.00% <ø> (ø)
...ponents/FileListItem/FileListItemTimeRemaining.jsx	100.00% <ø> (ø)
src/main/eventHandlers/beginDownload.ts	100.00% <ø> (ø)
...rc/main/eventHandlers/willDownloadEvents/onDone.ts	100.00% <ø> (ø)
...onents/FileDownloadsHeader/FileDownloadsHeader.jsx	97.82% <100.00%> (ø)
src/main/eventHandlers/beforeQuit.ts	100.00% <100.00%> (ø)
src/main/eventHandlers/didFinishLoad.ts	100.00% <100.00%> (ø)
src/main/eventHandlers/pauseDownloadItem.ts	100.00% <100.00%> (ø)
src/main/eventHandlers/requestDownloadsProgress.ts	92.59% <100.00%> (-0.52%)	:arrow_down:
... and 8 more