"Rework" the csv parsing to cook metatable for header access instead of whatever the fuck I was doing

processor/luahelper.lua

@@ -209,17 +209,45 @@ function fromCSV(csv, options)
 
 	if hasheader and #allRows > 0 then
 		local headers = allRows[1]
+		local headerMap = {}
+		for j = 1, #headers do
+			if headers[j] ~= nil and headers[j] ~= "" then
+				local headerName = trim(headers[j])
+				headerMap[headerName] = j
+			end
+		end
+
+		local header_mt = {
+			headers = headerMap,
+			__index = function(t, key)
+				local mt = getmetatable(t)
+				if type(key) == "string" and mt.headers and mt.headers[key] then
+					return rawget(t, mt.headers[key])
+				end
+				return rawget(t, key)
+			end,
+			__newindex = function(t, key, value)
+				local mt = getmetatable(t)
+				if type(key) == "string" and mt.headers then
+					if mt.headers[key] then
+						rawset(t, mt.headers[key], value)
+					else
+						error("unknown header: " .. tostring(key))
+					end
+				else
+					rawset(t, key, value)
+				end
+			end
+		}
+
 		local rows = {}
 		for ii = 2, #allRows do
 			local row = {}
 			local dataRow = allRows[ii]
 			for j = 1, #dataRow do
 				row[j] = dataRow[j]
-				if headers[j] ~= nil and headers[j] ~= "" then
-					local headerName = trim(headers[j])
-					row[headerName] = dataRow[j]
-				end
 			end
+			setmetatable(row, header_mt)
 			table.insert(rows, row)
 		end
 		rows.Headers = headers