Reorganize project. Add folder for shared code between backend/dashboard. Switch from jest to ava for tests.

backend/src/data/Configs.ts

@@ -0,0 +1,74 @@
+import { Config } from "./entities/Config";
+import {
+  getConnection,
+  getRepository,
+  Repository,
+  Transaction,
+  TransactionManager,
+  TransactionRepository,
+} from "typeorm";
+import { BaseGuildRepository } from "./BaseGuildRepository";
+import { connection } from "./db";
+import { BaseRepository } from "./BaseRepository";
+
+export class Configs extends BaseRepository {
+  private configs: Repository<Config>;
+
+  constructor() {
+    super();
+    this.configs = getRepository(Config);
+  }
+
+  getActiveByKey(key) {
+    return this.configs.findOne({
+      where: {
+        key,
+        is_active: true,
+      },
+    });
+  }
+
+  async getHighestId(): Promise<number> {
+    const rows = await connection.query("SELECT MAX(id) AS highest_id FROM configs");
+    return (rows.length && rows[0].highest_id) || 0;
+  }
+
+  getActiveLargerThanId(id) {
+    return this.configs
+      .createQueryBuilder()
+      .where("id > :id", { id })
+      .andWhere("is_active = 1")
+      .getMany();
+  }
+
+  async hasConfig(key) {
+    return (await this.getActiveByKey(key)) != null;
+  }
+
+  getRevisions(key, num = 10) {
+    return this.configs.find({
+      relations: this.getRelations(),
+      where: { key },
+      select: ["id", "key", "is_active", "edited_by", "edited_at"],
+      order: {
+        edited_at: "DESC",
+      },
+      take: num,
+    });
+  }
+
+  async saveNewRevision(key, config, editedBy) {
+    return connection.transaction(async entityManager => {
+      const repo = entityManager.getRepository(Config);
+      // Mark all old revisions inactive
+      await repo.update({ key }, { is_active: false });
+      // Add new, active revision
+      await repo.insert({
+        key,
+        config,
+        is_active: true,
+        edited_by: editedBy,
+      });
+    });
+  }
+}