GoogleSheets.Loader.Docs

Implemnts GoogleSheets.Loader behaviour by fetching a Spreadsheet with Google spreadsheet API.

The only loader specific configuration value is :url, which should point to the Atom feed describing the worksheet. See README.md for more detailed information about how to publish a spreadsheet and find the URL.

The loader first requests the Atom feed and parses URLs pointing to CSV data for each individual worksheet and the last_udpdated timestamp for spreadsheet.

If the last_updated field is equal to the one passes as previous_version, the loader stops and returns :unchanged

If not, it will filter the found CSV urls and leave only those that exist in the sheets argument. If the sheets argument is nil, it will load all worksheets.

After requesting all urls and parsing the responses, the loader checks that each invidivual spreadsheet given as sheets parameter exist and returns an SpreadSheetData.t structure.

If there are any errors during http requests and/or parsing, it will most likely raise an expection. If you use this loader in code which is not crash resistant, do handle the exceptions.