Created the Achievement.ts controller

controller/achievement.ts

@@ -0,0 +1,25 @@
+import {Achievement} from "../models/Achievement";
+
+/**
+ * Get all achievements of a guild
+ * @param guildId The id of the guild
+ * @param category The category of the achievements
+ */
+export const getAchievements = async (guildId: string, category: number) => {
+    return Achievement.findAll({where: {guildId: guildId, categoryId: category}});
+}
+
+/**
+ * Get the statistics of a guild
+ * @param guildId The id of the guild
+ */
+export const getStatistics = async (guildId: string) => {
+    let achievements = await Achievement.findAll({where: {guildId: guildId}});
+    let statistics: number[] = [];
+
+    for (let i = 1; i <= 5; i++) {
+        statistics.push(achievements.filter((achievement) => achievement.categoryId === i).length);
+    }
+
+    return statistics;
+}