Refactored to typescript & more consistent code

Updated how we interface with figlet and unified error handling &
response.

src/controllers/motdController.ts

@@ -0,0 +1,29 @@
+import FigletFonts from "../figletFonts";
+import IFigletOptions from "../interfaces/IFigletOptions";
+
+const figletFonts = new FigletFonts()
+
+function generateCatOutput(data: string) {
+  return Promise.resolve(`#!/bin/sh
+cat << 'EOF'
+${data}
+EOF
+  `)
+}
+
+const modtFontController = (req, res) => {
+  const { text, font, width } = req.query;
+  let options: IFigletOptions | Object = {};
+  if (font) options = { ...options, font };
+  if (width) options = { ...options, width };
+
+  figletFonts.generateText(text, options as IFigletOptions)
+    .then((data) => generateCatOutput(data))
+    .then((motd) => res.send(motd))
+    .catch((error) => {
+      const msg = error?.message || "Unexpected error from generating motd figlet"
+      res.status(error?.statusCode || 500).send(msg)
+    });
+};
+
+export default modtFontController;