text: // This helper remembers the size and position of your windows (and restores
  // them in that place after app relaunch).
  // Can be used for more than one window, just construct many
  // instances of it and give each different name.
  
  import { app, BrowserWindow, screen } from "electron";
  import jetpack from "fs-jetpack";
  
  export default (name, options) => {
    const userDataDir = jetpack.cwd(app.getPath("userData"));
    const stateStoreFile = `window-state-${name}.json`;
    const {width, height} = screen.getPrimaryDisplay().workAreaSize
    const defaultSize = {
      width: width,
      height: height
    };
    let state = {};
    let win;
  
    const restore = () => {
      let restoredState = {};
      try {
        restoredState = userDataDir.read(stateStoreFile, "json");
      } catch (err) {
        // For some reason json can't be read (might be corrupted).
        // No worries, we have defaults.
      }
      return Object.assign({}, defaultSize, restoredState);
    };
  
    const getCurrentPosition = () => {
      const position = win.getPosition();
      const size = win.getSize();
      return {
        x: position[0],
        y: position[1],
        width: size[0],
        height: size[1]
      };
    };
  
    const windowWithinBounds = (windowState, bounds) => {
      return (
        windowState.x >= bounds.x &&
        windowState.y >= bounds.y &&
        windowState.x + windowState.width <= bounds.x + bounds.width &&
        windowState.y + windowState.height <= bounds.y + bounds.height
      );
    };
  
    const resetToDefaults = () => {
      const bounds = screen.getPrimaryDisplay().bounds;
      return Object.assign({}, defaultSize, {
        x: (bounds.width - defaultSize.width) / 2,
        y: (bounds.height - defaultSize.height) / 2
      });
    };
  
    const ensureVisibleOnSomeDisplay = windowState => {
      const visible = screen.getAllDisplays().some(display => {
        return windowWithinBounds(windowState, display.bounds);
      });
      if (!visible) {
        // Window is partially or fully not visible now.
        // Reset it to safe defaults.
        return resetToDefaults();
      }
      return windowState;
    };
  
    const saveState = () => {
      if (!win.isMinimized() && !win.isMaximized()) {
        Object.assign(state, getCurrentPosition());
      }
      userDataDir.write(stateStoreFile, state, { atomic: true });
    };
  
    state = ensureVisibleOnSomeDisplay(restore());
  
    win = new BrowserWindow(Object.assign({}, options, state));
  
    win.on("close", saveState);
  
    return win;
  };
  