initial working version

src/newSku.ts

@@ -0,0 +1,42 @@
+function newSku(e: GoogleAppsScript.Events.SheetsOnEdit) {
+  var sheet = SpreadsheetApp.getActive().getActiveSheet()
+  if (sheet.getName() !== "product_inventory") {
+    console.log("skipping edit on sheet " + sheet.getName())
+    return
+  }
+  var row = e.range.getRow()
+  var idCell = sheet.getRange(row, 16).getCell(1, 1)
+  var idCellValue = idCell.getValue()
+  var skuPrefixCell = sheet.getRange(row, 15).getCell(1, 1)
+  var skuPrefixCellValue = skuPrefixCell.getValue()
+  console.log("skuPrefixCellValue = '" + skuPrefixCellValue + "'")
+  console.log("idCellValue = '" + idCellValue + "'")
+  if (idCellValue != "?" && idCellValue != "n") {
+    console.log("new ID was not requested, returning")
+    return
+  }
+  var idArray = sheet.getRange(2, 9, sheet.getLastRow(), 1).getValues()
+  var regExp = new RegExp(`^` + skuPrefixCellValue + `-0*(\\d+)$`)
+  console.log("regExp: " + regExp.toString())
+  var maxId = 0
+  for (let i = 0; i < idArray.length; i++) {
+    console.log("checking row " + (i + 1))
+    if (null == idArray[i] || String(idArray[i]) == "") {
+      console.log("ID cell looks null")
+      continue
+    }
+    console.log("ID cell: '" + idArray[i] + "'")
+    var match = regExp.exec(String(idArray[i]))
+    if (null === match) {
+      console.log("ID cell did not match")
+      continue
+    }
+    let numId = Number(match[1])
+    console.log("match: '" + match + "', numId: " + numId)
+    maxId = Math.max(numId, maxId)
+    console.log("numId: " + numId + ", maxId: " + maxId)
+  }
+  let newId = maxId + 1
+  console.log("newId: " + newId)
+  idCell.setValue(newId)
+}