DeFiCh/wallet

import * as FileSystem from "expo-file-system";
import { UserPreferences } from "@store/userPreferences";
import { EnvironmentNetwork } from "@waveshq/walletkit-core";
import { Logging } from "@api";
import { ILocalStorage } from "./index";

const LOCAL_STORAGE_FILENAME = "wallet_settings";
const LOCAL_STORAGE_FILE_TYPE = ".json";

function getFileName(network: EnvironmentNetwork, directory: string): string {
  return `${directory}${LOCAL_STORAGE_FILENAME}_${network}${LOCAL_STORAGE_FILE_TYPE}`;
}

async function ensureFileExist(directory: string): Promise<void> {
  const fileInfo = await FileSystem.getInfoAsync(directory);
  if (!fileInfo.exists) {
    try {
      await FileSystem.writeAsStringAsync(directory, JSON.stringify({}), {
        encoding: "utf8",
      });
    } catch (e: any) {
      Logging.error(e);
      throw new Error(e);
    }
  }
}

async function getUserPreferences(
  network: EnvironmentNetwork
): Promise<UserPreferences> {
  let userPreferences = null;
  if (FileSystem.documentDirectory != null) {
    const directory = getFileName(network, FileSystem.documentDirectory);
    try {
      await ensureFileExist(directory);
      const fileContents = await FileSystem.readAsStringAsync(directory);
      userPreferences =
        fileContents !== undefined ? JSON.parse(fileContents) : userPreferences;
    } catch (e) {
      Logging.error(e);
    }
  }
  return userPreferences ?? {};
}

async function setUserPreferences(
  network: EnvironmentNetwork,
  userPreferences: UserPreferences
): Promise<void> {
  try {
    if (FileSystem.documentDirectory !== null) {
      try {
        const directory = getFileName(network, FileSystem.documentDirectory);
        await ensureFileExist(directory);
        await FileSystem.writeAsStringAsync(
          directory,
          JSON.stringify(userPreferences),
          { encoding: "utf8" }
        );
      } catch (e) {
        Logging.error(e);
      }
    }
  } catch (e) {
    Logging.error(e);
  }
}

export const Provider: ILocalStorage = {
  getUserPreferences,
  setUserPreferences,
};