Improve the csv parser by reading header and assigning values to their header

So we have things like row[1] AND ALSO row["foobar"]
And also row.foobar of course

processor/processor.go

@@ -223,12 +223,16 @@ end
 ---
 --- @param csv string The CSV text to parse.
 --- @param delimiter string? The field delimiter (default: ",").
---- @return table A table (array) of rows; each row is a table (array) of string fields.
-function fromCSV(csv, delimiter)
+--- @param hasHeaders boolean? If true, first row is treated as headers and rows can be accessed by header name (default: false).
+--- @return table A table (array) of rows; each row is a table with numeric indices and optionally header-named keys.
+function fromCSV(csv, delimiter, hasHeaders)
 	if delimiter == nil then
 		delimiter = ","
 	end
-	local rows = {}
+	if hasHeaders == nil then
+		hasHeaders = false
+	end
+	local allRows = {}
 	local fields = {}
 	local field = {}
 
@@ -254,7 +258,7 @@ function fromCSV(csv, delimiter)
 			elseif c == '\r' or c == '\n' then
 				table.insert(fields, table.concat(field))
 				field = {}
-				table.insert(rows, fields)
+				table.insert(allRows, fields)
 				fields = {}
 				if c == '\r' and i < len and csv:sub(i + 1, i + 1) == '\n' then
 					i = i + 2
@@ -286,7 +290,7 @@ function fromCSV(csv, delimiter)
 			elseif c == '\r' or c == '\n' then
 				table.insert(fields, table.concat(field))
 				field = {}
-				table.insert(rows, fields)
+				table.insert(allRows, fields)
 				fields = {}
 				state = STATE_DEFAULT
 				if c == '\r' and i < len and csv:sub(i + 1, i + 1) == '\n' then
@@ -303,10 +307,27 @@ function fromCSV(csv, delimiter)
 
 	if #field > 0 or #fields > 0 then
 		table.insert(fields, table.concat(field))
-		table.insert(rows, fields)
+		table.insert(allRows, fields)
 	end
 
-	return rows
+	if hasHeaders and #allRows > 0 then
+		local headers = allRows[1]
+		local rows = {}
+		for i = 2, #allRows do
+			local row = {}
+			local dataRow = allRows[i]
+			for j = 1, #dataRow do
+				row[j] = dataRow[j]
+				if headers[j] ~= nil and headers[j] ~= "" then
+					row[headers[j]] = dataRow[j]
+				end
+			end
+			table.insert(rows, row)
+		end
+		return rows
+	end
+
+	return allRows
 end
 
 --- Converts a table of rows back to CSV text format (RFC 4180 compliant).
@@ -676,7 +697,7 @@ STRING FUNCTIONS:
   format(s, ...)          - Formats string using Lua string.format
   trim(s)                 - Removes leading/trailing whitespace
   strsplit(inputstr, sep) - Splits string by separator (default: whitespace)
-  fromCSV(csv, delimiter) - Parses CSV text into rows of fields (delimiter defaults to ",")
+  fromCSV(csv, delimiter, hasHeaders) - Parses CSV text into rows of fields (delimiter defaults to ",", hasHeaders defaults to false)
   toCSV(rows, delimiter)  - Converts table of rows to CSV text format (delimiter defaults to ",")
   num(str)                - Converts string to number (returns 0 if invalid)
   str(num)                - Converts number to string