sendou.ink/app/modules/brackets-manager/manager.ts

import type {
  CrudInterface,
  Database,
  DataTypes,
  Storage,
  Table,
} from "./types";
import type { InputStage, Stage } from "~/modules/brackets-model";
import { create } from "./create";
import { Get } from "./get";
import { Update } from "./update";
import { Delete } from "./delete";
import { Find } from "./find";
import { Reset } from "./reset";
import * as helpers from "./helpers";

/**
 * A class to handle tournament management at those levels: `stage`, `group`, `round`, `match` and `match_game`.
 */
export class BracketsManager {
  public storage: Storage;

  public get: Get;
  public update: Update;
  public delete: Delete;
  public find: Find;
  public reset: Reset;

  /**
   * Creates an instance of BracketsManager, which will handle all the stuff from the library.
   *
   * @param storageInterface An implementation of CrudInterface.
   */
  constructor(storageInterface: CrudInterface) {
    const storage = storageInterface as Storage;

    storage.selectFirst = <T extends Table>(
      table: T,
      filter: Partial<DataTypes[T]>
    ): DataTypes[T] | null => {
      const results = this.storage.select<T>(table, filter);
      if (!results || results.length === 0) return null;
      return results[0];
    };

    storage.selectLast = <T extends Table>(
      table: T,
      filter: Partial<DataTypes[T]>
    ): DataTypes[T] | null => {
      const results = this.storage.select<T>(table, filter);
      if (!results || results.length === 0) return null;
      return results[results.length - 1];
    };

    this.storage = storage;
    this.get = new Get(this.storage);
    this.update = new Update(this.storage);
    this.delete = new Delete(this.storage);
    this.find = new Find(this.storage);
    this.reset = new Reset(this.storage);
  }

  /**
   * Creates a stage for an existing tournament. The tournament won't be created.
   *
   * @param stage A stage to create.
   */
  public create(stage: InputStage): Stage {
    return create.call(this, stage);
  }

  /**
   * Imports data in the database.
   *
   * @param data Data to import.
   * @param normalizeIds Enable ID normalization: all IDs (and references to them) are remapped to consecutive IDs starting from 0.
   */
  public import(data: Database, normalizeIds = false): void {
    if (normalizeIds) data = helpers.normalizeIds(data);

    if (!this.storage.delete("participant"))
      throw Error("Could not empty the participant table.");
    if (!this.storage.insert("participant", data.participant))
      throw Error("Could not import participants.");

    if (!this.storage.delete("stage"))
      throw Error("Could not empty the stage table.");
    if (!this.storage.insert("stage", data.stage))
      throw Error("Could not import stages.");

    if (!this.storage.delete("group"))
      throw Error("Could not empty the group table.");
    if (!this.storage.insert("group", data.group))
      throw Error("Could not import groups.");

    if (!this.storage.delete("round"))
      throw Error("Could not empty the round table.");
    if (!this.storage.insert("round", data.round))
      throw Error("Could not import rounds.");

    if (!this.storage.delete("match"))
      throw Error("Could not empty the match table.");
    if (!this.storage.insert("match", data.match))
      throw Error("Could not import matches.");

    if (!this.storage.delete("match_game"))
      throw Error("Could not empty the match_game table.");
    if (!this.storage.insert("match_game", data.match_game))
      throw Error("Could not import match games.");
  }

  /**
   * Exports data from the database.
   */
  public export(): Database {
    const participants = this.storage.select("participant");
    if (!participants) throw Error("Error getting participants.");

    const stages = this.storage.select("stage");
    if (!stages) throw Error("Error getting stages.");

    const groups = this.storage.select("group");
    if (!groups) throw Error("Error getting groups.");

    const rounds = this.storage.select("round");
    if (!rounds) throw Error("Error getting rounds.");

    const matches = this.storage.select("match");
    if (!matches) throw Error("Error getting matches.");

    const matchGames = this.get.matchGames(matches);

    return {
      participant: participants,
      stage: stages,
      group: groups,
      round: rounds,
      match: matches,
      match_game: matchGames,
    };
  }
}