Created a sticker seeder.

data/stickerSeeder.ts

@@ -0,0 +1,51 @@
+import { getDaysInMonth, getYear, getMonth, isBefore } from "date-fns";
+
+/**
+ * This seeder is to simulate the date and sticker info from the database.
+ * Filling up an array for the current month with sticker from ths first to
+ * the day before the current date, leaving the rest of the month empty.
+ */
+
+interface Sticker {
+  date: Date;
+  sticker: -2 | -1 | 0 | 1 | 2 | null;
+}
+
+const generateSticker = (): -2 | -1 | 0 | 1 | 2 => {
+  const stickerPossibility = [-2, -1, 0, 1, 2];
+  const sticker = Math.floor(Math.random() * stickerPossibility.length);
+
+  if (
+    sticker === -2 ||
+    sticker === -1 ||
+    sticker === 0 ||
+    sticker === 1 ||
+    sticker === 2
+  ) {
+    return sticker;
+  }
+};
+
+const stickersSeeder = (): Sticker[] => {
+  const stickers = [] as Sticker[];
+
+  const now = new Date();
+  const daysOfThisMonth = getDaysInMonth(now);
+
+  for (let i = 0; i <= daysOfThisMonth; i++) {
+    const currDate = new Date(getYear(now), getMonth(now) - 1, i);
+
+    const newSticker: Sticker = {
+      date: currDate,
+      sticker: isBefore(currDate, now) ? generateSticker() : null
+    };
+
+    stickers.push(newSticker);
+  }
+
+  if (stickers.length === daysOfThisMonth) {
+    return stickers;
+  }
+};
+
+export default stickersSeeder;