// ==UserScript==
// @name         Twitter media-only filter toggle.
// @version      0.22
// @description  Toggle non-media tweets on and off on the home timeline, for the power-viewer!
// @author       Cro
// @match        https://*.twitter.com/*
// @match        https://*.x.com/*
// @run-at       document-idle
// @grant        GM_setValue
// @grant        GM_getValue
// @namespace https://greasyfork.org/users/10865
// @icon         https://www.google.com/s2/favicons?domain=twitter.com
// @license      MIT
// ==/UserScript==
/* jshint esversion: 6 */
(function() {
'use strict';
let storage_key = 'cro-media-toggle';
let show_all = GM_getValue(storage_key);
let create_ui = function(target)
{
let button = document.createElement('button');
button.innerText = show_all ? 'Showing all home tweets' : 'Showing only media home tweets';
button.onclick = function(event)
{
show_all = !show_all;
GM_setValue(storage_key, show_all);
location.reload();
};
target.prepend(button);
};
let walk_objects = function*(obj)
{
let stack = Object.entries(obj);
while (stack.length > 0)
{
let entry = stack.pop();
yield entry;
if (entry[1] != null && typeof(entry[1]) == 'object')
{
stack = stack.concat(Object.entries(entry[1]));
}
}
};
let find_objects_at_keys = (obj, keys) => Array.from(walk_objects(obj)).filter(e => keys.includes(e[0])).map(e => e[1]);
let any_key_in_obj = (obj, keys) => Array.from(walk_objects(obj)).some(e => keys.includes(e[0]));
let target_entry_types = ['tweet-', 'promoted-tweet-', 'home-conversation-'];
let media_types = ['media', 'card'];
let has_media = (obj) => !target_entry_types.some(e => obj.entryId.startsWith(e)) || any_key_in_obj(obj, media_types);
let update_data = function(data)
{
if (show_all || location.pathname != '/home')
{
return;
}
for (let obj of find_objects_at_keys(data, ['instructions']))
{
for (let subobj of obj)
{
if (subobj.hasOwnProperty('entries'))
{
subobj.entries = subobj.entries.filter(has_media);
}
}
}
};
let old_parse = JSON.parse;
let unsafe_window_parse = unsafeWindow.JSON.parse;
let new_unsafe_window_parse = function(string)
{
let data = old_parse(string);
try
{
if (data != null)
{
update_data(data);
}
}
catch(error)
{
console.log(error);
}
return unsafe_window_parse(JSON.stringify(data));;
};
exportFunction(new_unsafe_window_parse, unsafeWindow.JSON, { defineAs: 'parse' });
// Wait for twitter's react crap finish loading things.
let scan_interval = setInterval(function()
{
let target = document.body.querySelector('nav[role="navigation"]');
if (target)
{
clearInterval(scan_interval);
create_ui(target);
}
}, 10);
})();