Initial commit, 90% there

.node-red/node_modules/node-red-contrib-spreadsheet-in/cell.js

@@ -0,0 +1,25 @@
+module.exports = function(RED) {
+	const XLSX = require('xlsx');
+
+	function CellNode(config) {
+		RED.nodes.createNode(this,config);
+		var node = this;
+		node.on('input', function(msg) {
+			var address = config.address || msg.selectAddress;
+			delete msg.selectAddress;
+			if (!address) {
+				return node.error(RED._("cell.errors.no-address"));
+			} else if (!/[A-Z]+[1-9][0-9]*/.test(address)) {
+				return node.error(RED._("cell.errors.invalid-address") + ": " + address);
+			}
+
+			var cell = msg.payload && msg.payload[address];
+			msg.payload = cell && config.dataType
+				? cell[config.dataType]
+				: cell;
+			msg.selectedAddress = address;
+			node.send(msg);
+		});
+	}
+	RED.nodes.registerType("cell",CellNode);
+}