Modularising and refactoring server.R

[fontikar]

Which parts of server.R can be potentially modularised
In other words, code removed from server.R, put in its own .R or in global.R (where appropriate)

• Returning empty table if no records are found in target
• Update selectize input for genus and family
• Creating a single statement of what has been found in target area
• In target vs in buffer zone
• Reactive of creating circle polygon
• Lat Long filter in ala_data

Which parts of server.R can be refactored?
In other words, improved upon so server.R contains less processing code

• Processing of filtered_data() - can occur after galah_download

  • Sorting N in descending order
  • Creating and sorting datatable from result in target area
    • Move creation of URL https://biocache.ala.org.au/occurrences/ to galah_download.R #87

• Saving of CSV

  • Renaming of columns - can occur after galah_download
  • Creation of URL https://biocache.ala.org.au/occurrences/
  • Renaming of columns