// ==UserScript==
// @name        Load .gsheet link from local file
// @version     0.2
// @description Discover Google Docs link in .gsheet file and navigate to it. 2020-03-02.
// @author      Jefferson "jscher2000" Scher
// @namespace   JeffersonScher
// @copyright   Copyright 2020 Jefferson Scher
// @license     BSD-3-Clause
// @match       file:///*/*
// @grant       GM_registerMenuCommand
// @run-at      document-idle
// ==/UserScript==
function loadSheet(){
// Parse document text as JSON
var oSheetInfo = JSON.parse(document.body.textContent);
// Replace current page with linked page
if (oSheetInfo.url.indexOf('https://docs.google.com/') === 0){
// Go directly to HTTPS link
location.replace(oSheetInfo.url);
} else if (oSheetInfo.url.indexOf('http://docs.google.com/') === 0){
// Upgrade HTTP link
location.replace(oSheetInfo.url.replace('http://', 'https://'));
} else {
// Ask user about WTF link
if (confirm('Navigate to "' + oSheetInfo.url + '"?')){
location.replace(oSheetInfo.url);
}
}
}
// Detect documents whose paths end with .gsheet and run loadSheet(), add menu item
if (location.pathname.indexOf('.gsheet') > -1 && location.pathname.slice(-7) == '.gsheet'){
window.setTimeout(loadSheet, 50);
// This should work in Violentmonkey and Tampermonkey, but unfortunately not Greasemonkey.
try {
GM_registerMenuCommand("Navigate now", loadSheet);
} catch (err) {
console.log('Error adding Load .gsheet from local file menu items: ' + err.message);
}
}