nestjs-telegraf-i18n/src/i18n-context-patcher.ts

I18n integration for NestJS Telegraf

import { Injectable, Logger, OnModuleInit } from "@nestjs/common";
import * as i18nUtils from "nestjs-i18n/dist/utils/context";

@Injectable()
export class I18nContextGetterPatcher implements OnModuleInit {
  private readonly logger = new Logger(this.constructor.name);
  private readonly _suppressedTypes: Set<string>;

  constructor(
    private readonly suppressedTypes: Set<string> | string | string[],
  ) {
    if (typeof suppressedTypes === "string") {
      this._suppressedTypes = new Set([suppressedTypes]);
    } else if (Array.isArray(suppressedTypes)) {
      this._suppressedTypes = new Set(suppressedTypes);
    } else {
      this._suppressedTypes = suppressedTypes;
    }
  }

  onModuleInit() {
    this.logger.log(
      `Patching nestjs-i18n getContextObject to suppress warnings for context types: "${[...this._suppressedTypes].join('", "')}"`,
    );
    if (i18nUtils && (i18nUtils as any).getContextObject) {
      const originalGetContextObject = (i18nUtils as any).getContextObject;

      (i18nUtils as any).getContextObject = (...args: any[]) => {
        const contextType = args[1]?.getType?.() ?? "undefined";
        if (this._suppressedTypes.has(contextType)) {
          return undefined;
        }
        return originalGetContextObject.apply(this, args);
      };
    }
  }
}

@Injectable()
export class TelegrafI18nContextGetterPatcher extends I18nContextGetterPatcher {
  constructor() {
    super("telegraf");
  }
}