I'd like to trigger a check if a sheet with "name = current week number" exists when I open my Google spreadsheet on Android and if not - create such sheet by duplicating first sheet and giving it a "name = current week number". In the past I couldn't get "on Open()" trigger to work on mobile Sheets even with created "on Open(e)" simple trigger.
As far as I understand, first thing I need is to get "var = current week number". I've looked through some solutions on SO but wasn't able to make something out of them.
Here's the link to the test sheet. https://docs.google.com/spreadsheets/d/1ffFy7aCkaInRbp9w5_WUoB2VkV8nZoSEG2z32WelEqM/edit?usp=sharing
Thank you for any help.