Average of updating entries with chosen columns - google-sheets

Question

Given a sheet like this:
+ ------ + ------- + ---------- + ---------- + ---------- + ---------- +
| A | B | C | D | E | F |
+ -------+ ------- + ---------- + ---------- + ---------- + ---------- +
| AVG | ITEMS | Week 3 May | Week 2 May | Week 1 May | Week 5 Apr |
|=QUERY()| Item 1 | 1263 | 1255 | 1142 | 956 |
| | Item 2 | 1371 | 1263 | 1023 | 1120 |
| | Item 3 | 1382 | 1257 | 1352 | 1853 |
| | Item 4 | 1429 | 1281 | 1120 | 1869 |
I need to move the column B to the first column (A).
Make a script to add a new colum for new entries.
1.-
In AVG column (column A in the example above) there is an average using the formula:
=QUERY(transpose(query(transpose(B2:$F),"Select "&REGEXREPLACE(join("",ArrayFormula(if(len(B2:B),"Avg(Col"&ROW($C2:$C)-ROW($C2)+1&"),",""))), ".\z","")&"")),"Select Col2")
This formula calculates the average of the last 4 weeks only if there's an entry in column B
I need to move this column to the right of the Items list (column B) but when I try to, the formula shows a circular dependency error. Is there a way to tell the formula to only pick the columns I want to?
2.-
There's also a button with an assigned macro to make a new column on the left of the latest week for new entries and insert the week number and month, this is the script:
function onEdit() {
var spreadsheet = SpreadsheetApp.getActive();
spreadsheet.getRange('C:C').activate();
spreadsheet.getActiveSheet().insertColumnsBefore(spreadsheet.getActiveRange().getColumn(), 1);
spreadsheet.getActiveRange().offset(0, 0, spreadsheet.getActiveRange().getNumRows(), 1).activate();
spreadsheet.getRange('C1').activate()
.setFormula('=CONCATENATE("Week ",(WEEKNUM(TODAY(),2)-WEEKNUM(EOMONTH(TODAY(),-1)+1)+1)," ",CHOOSE(MONTH(TODAY()),"Jan","Feb","Mar","Apr","May","Jun","Jul","Ago","Sep","Oct","Nov","Dec"))');
};
So it becomes something like this:
+ ------ + ------- + ---------- + ---------- + ---------- + ---------- + ---------- +
| A | B | C | D | E | F | G |
+ -------+ ------- + ---------- + ---------- + ---------- + ---------- + ---------- +
| AVG | ITEMS | Week X MMM | Week 3 May | Week 2 May | Week 1 May | Week 5 Apr |
| | Item 1 | (NEW WEEK) | 1263 | 1255 | 1142 | 956 |
and this is the formula I am using for the week number:
=CONCATENATE("Week ",(WEEKNUM(TODAY(),2)-WEEKNUM(EOMONTH(TODAY(),-1)+1)+1)," ",CHOOSE(MONTH(TODAY()),"Jan","Feb","Mar","Apr","May","Jun","Jul","Ago","Sep","Oct","Nov","Dec"))
The problem with the formula is that uses TODAY() function, which has a variable value while I need a static value. Also when using the script the Conditional Formatting is not carried over in the new column. How can I improve the script?

Answer 1

For replacing TODAY() with a static value, use the Javascript date methods and format the date according to your spreadsheet setting with Utilities.formatDate()
Replace the formula part TODAY() with the variable containing the date object as explained above
Sample:
function onEdit() {
var spreadsheet = SpreadsheetApp.getActive();
var now = new Date();
var today = '"' + Utilities.formatDate(now, spreadsheet.getSpreadsheetTimeZone(), "MM/dd/yyyy") + '"';
spreadsheet.getRange('C:C').activate();
spreadsheet.getActiveSheet().insertColumnsBefore(spreadsheet.getActiveRange().getColumn(), 1);
spreadsheet.getActiveRange().offset(0, 0, spreadsheet.getActiveRange().getNumRows(), 1).activate();
spreadsheet.getRange('C1').activate()
.setFormula('=CONCATENATE("Week ",(WEEKNUM(' +today + ',2)-WEEKNUM(EOMONTH(' + today + ',-1)+1)+1)," ",CHOOSE(MONTH(' + today + '),"Jan","Feb","Mar","Apr","May","Jun","Jul","Ago","Sep","Oct","Nov","Dec"))');
};
Note: If your spreadsheet date format is no "MM/dd/yyyy" - modify formatDate(date, timeZone, format) accordingly, see here
The conditional formatting has to be set separately from setFormula, see here for a sample.