Initial work on stats

backend/src/data/GuildStats.ts

@@ -0,0 +1,30 @@
+import { BaseGuildRepository } from "./BaseGuildRepository";
+import { connection } from "./db";
+import { getRepository, Repository } from "typeorm";
+import { StatValue } from "./entities/StatValue";
+
+export class GuildStats extends BaseGuildRepository {
+  private stats: Repository<StatValue>;
+
+  constructor(guildId) {
+    super(guildId);
+    this.stats = getRepository(StatValue);
+  }
+
+  async saveValue(source: string, key: string, value: number): Promise<void> {
+    await this.stats.insert({
+      guild_id: this.guildId,
+      source,
+      key,
+      value,
+    });
+  }
+
+  async deleteOldValues(source: string, cutoff: string): Promise<void> {
+    await this.stats
+      .createQueryBuilder()
+      .where("source = :source", { source })
+      .andWhere("created_at < :cutoff", { cutoff })
+      .delete();
+  }
+}

backend/src/data/entities/StatValue.ts

@@ -0,0 +1,20 @@
+import { Entity, Column, PrimaryColumn, CreateDateColumn } from "typeorm";
+
+@Entity("stats")
+export class StatValue {
+  @Column()
+  @PrimaryColumn()
+  id: string;
+
+  @Column()
+  guild_id: string;
+
+  @Column()
+  source: string;
+
+  @Column() key: string;
+
+  @Column() value: number;
+
+  @Column() created_at: string;
+}