Group rows using google apps scripts - google-apps-script

Question

I am writing code in which a user can automatically generate a template of lesson and sub-topics. Each lesson will have 10 sub-topics.
I also need to group the rows lesson-wise and topic-wise.
But, I am unable to group the rows lesson-wise and topic-wise. Tried using the macro-recorder, but the code does not work while generating multiple lessons.
EDIT: Working code is updated below.
function shiftrowgroupdepth() {
var spreadsheet = SpreadsheetApp.getActive();
var sheet = spreadsheet.getActiveSheet();
// start from row 6 and column 2
var row = 6;
var col = 2;
//Ask user for the no. of lessons
var shlen = Browser.inputBox("Enter no of lessons", Browser.Buttons.OK_CANCEL);
for (var i = 1; i <= shlen; i++) {
sheet.getRange(row,col).setValue("Lesson " + i);
row++;
Logger.log(spreadsheet.getCurrentCell().getRow())
sheet.getRange(row, 1, 70, sheet.getMaxColumns()).activate()
.shiftRowGroupDepth(1);
// Add sub-topics (1.1, 1.2 ....)
for (var j=1;j<=10;j++){
sheet.getRange(row,col).setValue(i+"."+j);
sheet.getRange(row+1, 1, 6, sheet.getMaxColumns()).activate()
.shiftRowGroupDepth(1);
row=row+7;
}
}
};

Answer 1

The OP code was very close to the mark. The main changes in this answer are:
When using a 'dot' separator for the topic codes, Google sheets treats the resulting value as a number; this creates problems displaying '1.10'. I changed the separator to a 'dash'. No doubt there is another potential approach using toString - but this was quick and easy.
The Lesson grouping is straightforward; 10 topics, 7 rows per topic = 70 rows.
Topic grouping had been complicated by referring to the location of the "current cell" - which could be anywhere on the sheet. I simplified this by using the row variable, which the OP had already (correctly) incremented.
function so5774532602() {
var ss = SpreadsheetApp.getActive();
var sheetname = "OPSheet";
var sheet = ss.getSheetByName(sheetname);
var row = 6;
var col = 2;
//Ask user for the no. of lessons
var shlen = Browser.inputBox("Enter no of lessons", Browser.Buttons
.OK_CANCEL);
for (var i = 1; i <= shlen; i++) {
sheet.getRange(row, col).setValue("Lesson " + i);
// add grouping
// Logger.log("DEBUG: i = "+i+", lesson range = "+sheet.getRange(+(row + 1), 2, 70, 1).getA1Notation());
sheet.getRange(+(row + 1), 2, 70, 1).activate()
.shiftRowGroupDepth(1);
row++;
// Add sub-topics (1.1, 1.2 ....) leave 6 blank rows below each sub-topic. Then, group those blank rows
for (var j = 1; j <= 10; j++) {
// Logger.log("DEBUG: i = "+i+", j = "+j+", row = "+row+", col = "+col); // new
sheet.getRange(row, col).setValue(i + "-" + j);
// add grouping
// Logger.log("DEBUG: range details: row = "+(row + 1) +",column = 1"+"number of rows = "+6+", number of columns = 1");
// Logger.log("DEBUG: topic range = "+sheet.getRange(+(row + 1), 2, 6, 1).getA1Notation());
sheet.getRange(+(row + 1), 2, 6, 1).activate()
.shiftRowGroupDepth(1);
row = row + 7;
}
}
}
Edit
Two minor changes for formatting
sheet.getRange(row,col).setValue("Lesson " + i).setHorizontalAlignment("center");
Centres the Lesson Number in the column.
sheet.getRange(row,col).setNumberFormat("#").setValue(i+"."+j).setHorizontalAlignment("center");
A return to a 'dot' separator but enables the tenth topic to display as 1.10, etc (credit #Tanaike). Will also center the text in the column.