#!/usr/bin/env osascript -l JavaScript
// A script to close Safari tabs.
//
// This is a script I run when I see high memory usage in Activity Monitor --
// it shows me the URL but no easy way to jump to the tab.  If I recognise
// the URL and I know I can close it safely, this script lets me do that
// quickly.

safari = Application("Safari");

// Generates all the window/tab/URLs in Safari.
//
// This runs in reverse window/tab index order: that is, windows are returned
// bottom to top, and tabs from right to left.
function* tabGenerator() {
  window_count = safari.windows.length;

  for (window_index = window_count - 1; window_index >= 0; window_index--) {
    window = safari.windows[window_index];

    tab_count = window.tabs.length;

    for (tab_index = tab_count - 1; tab_index >= 0; tab_index--) {
      tab = window.tabs[tab_index];

      if (tab.url() !== null) {
        yield [window_index, tab_index, tab.url(), tab.name()];
      }
    }
  }
}


function run(argv) {
  let closedCount = 0;
  let remainingCount = 0;

  for (const [window_index, tab_index, url, title] of tabGenerator()) {
    for (i = 0; i < argv.length; i++) {
      const searchFragment = argv[i];

      if (url.includes(searchFragment)) {
        console.log(`${url} (${title})`);
        safari.windows[window_index].tabs[tab_index].close();
        closedCount += 1;
        break;
      } else {
        remainingCount += 1;
      }
    }
  }

  console.log(`Closed ${closedCount} tab${closedCount !== 1 ? 's' : ''}; ${remainingCount} tab${remainingCount !== 1 ? 's' : ''} left open`)
}