feat: initial commit

src/modules/images/generateBanner.ts

@@ -0,0 +1,37 @@
+import { AttachmentData } from "../../interfaces/commands/AttachmentData";
+import { WeatherForecast } from "../../interfaces/weather/WeatherForecast";
+
+import { getBannerImage } from "./getBannerImage";
+import { getOverlayImage } from "./getOverlayImage";
+import { overlayImages } from "./overlayImages";
+
+/**
+ * Generates the banner image. If an overlay is available, constructs a new banner image by overlaying the overlay on the banner.
+ * Otherwise, returns the banner itself.
+ *
+ * @param {WeatherForecast} forecast The weather forecast.
+ * @returns {AttachmentData} The banner image attachment data.
+ */
+export const generateBanner = async (
+  forecast: WeatherForecast
+): Promise<AttachmentData> => {
+  const background = getBannerImage(forecast.region);
+  const overlayQuery =
+    forecast.special?.name === "Blight Rain"
+      ? "Blight Rain"
+      : forecast.precipitation?.name;
+
+  if (!overlayQuery) {
+    return background;
+  }
+
+  const overlayPath = getOverlayImage(overlayQuery);
+
+  if (!overlayPath) {
+    return background;
+  }
+
+  const overlay = await overlayImages(background.filePath, overlayPath);
+
+  return overlay;
+};