Alerts you of people who have allegedly violated other people's consent as you browse Facebook.
/**
*
* This is a Greasemonkey script and must be run using a Greasemonkey-compatible browser.
*
* @author maymay <bitetheappleback@gmail.com>
*/
// ==UserScript==
// @name Predator Alert Tool for Facebook (PAT-Facebook)
// @version 0.1.3
// @namespace com.maybemaimed.facebook.predator-alert-tool
// @description Alerts you of people who have allegedly violated other people's consent as you browse Facebook.
// @include https://www.facebook.com/*
// @include http://www.facebook.com/*
// @include https://apps.facebook.com/*
// @include http://apps.facebook.com/*
// @include https://predator-alert-tool.herokuapp.com/*
// @exclude https://www.facebook.com/ajax*
// @exclude http://www.facebook.com/ajax*
// @exclude https://www.facebook.com/ai.php*
// @exclude http://www.facebook.com/ai.php*
// @grant GM_log
// @grant GM_xmlhttpRequest
// @grant GM_addStyle
// @grant GM_setValue
// @grant GM_getValue
// ==/UserScript==
PAT_FB = {};
PAT_FB.CONFIG = {
'debug': false, // switch to true to debug.
'api_url': 'https://predator-alert-tool.herokuapp.com/api.php?fbid='
};
// Utility debugging function.
PAT_FB.log = function (msg) {
if (!PAT_FB.CONFIG.debug) { return; }
GM_log('PAT-Facebook: ' + msg);
};
// Utility function to read cookie values.
function getCookie (n) {
try {
return unescape(document.cookie.match('(^|;)?'+n+'=([^;]*)(;|$)')[2]);
} catch (e) {
return null;
}
}
PAT_FB.getUserID = function () {
try {
return unsafeWindow.Env.user
} catch (e) {
return getCookie('c_user');
}
};
// Initializations.
GM_addStyle('\
');
PAT_FB.current_user = null; // Who are we?
PAT_FB.init = function () {
// We need to capture the session cookies from the PAT-FB server, so if we
// loaded the server's pages, save the cookies locally for later use.
// TODO: But, um, this functionality really starts requiring a browser ext.
if (unsafeWindow.location.host == PAT_FB.parseApiUrl().host) {
GM_setValue('pat_fb_cookies', document.cookie);
}
PAT_FB.current_user = PAT_FB.getUserID();
var MutationObserver = unsafeWindow.MutationObserver || unsafeWindow.WebKitMutationObserver;
var observer = new MutationObserver(function (mutations) {
mutations.forEach(function (mutation) {
if (mutation.addedNodes) {
for (var i = 0; i < mutation.addedNodes.length; i++) {
// Skip text nodes.
if (mutation.addedNodes[i].nodeType == Node.TEXT_NODE) { continue; }
// If the new node is a hovercard
var ownerid = mutation.addedNodes[i].getAttribute('data-ownerid');
var num_pat;
// and this hovercard has any PAT data, grab that data
if (ownerid && (num_pat = document.getElementById(ownerid).getAttribute('data-num-pat-reports'))) {
// and insert it into the hovercard HTML.
var a = document.createElement('a');
a.setAttribute('href',
PAT_FB.parseApiUrl().protocol + '//' + PAT_FB.parseApiUrl().host
+ '/reports.php?action=lookup&reportee_id='
+ document.getElementById(ownerid).getAttribute('data-pat-reportee-id')
);
a.setAttribute('class', 'pat-reports-link');
a.innerHTML = 'View ' + num_pat + ' PAT-FB stories';
// Don't append a duplicate link if we're re-processing this node.
// TODO: Uhm, yeah, why don't we just not re-process it multiple times?
if (!mutation.addedNodes[i].querySelector('.pat-reports-link')) {
mutation.addedNodes[i].querySelectorAll('table td')[1].appendChild(a);
}
}
// Process all the rest.
PAT_FB.main(mutation.addedNodes[i]);
}
}
});
});
var el = document.body;
observer.observe(el, {
'childList': true,
'subtree': true
});
PAT_FB.main(document);
};
window.addEventListener('DOMContentLoaded', PAT_FB.init);
// main() is given a start node (HTML tree) and processes appropriately.
PAT_FB.main = function (node) {
PAT_FB.log('Starting main() on page ' + unsafeWindow.location.toString());
var els = node.querySelectorAll('[data-hovercard]');
for (var i = 0; i < els.length; i++) {
var fbid = els[i].getAttribute('data-hovercard').match(/id=(\d+)/)[1];
PAT_FB.log('Found Facebook ID ' + fbid + '.');
PAT_FB.maybeFlagEntity(fbid, els[i]);
}
};
PAT_FB.parseApiUrl = function () {
var a = document.createElement('a');
a.setAttribute('href', PAT_FB.CONFIG.api_url);
return {
'protocol': a.protocol,
'host': a.host,
'port': a.port,
'pathname': a.pathname
};
}
/**
* Queries the PAT-FB server for reports by Facebook ID. If a result is found,
* applies styling to the HTML node appropriately.
*
* @param fbid The numeric Facebook ID to query.
* @param el The HTML node from which the ID was scraped.
*/
PAT_FB.maybeFlagEntity = function (fbid, el) {
if (!fbid) { PAT_FB.log('Invalid ID passed to maybeFlagEntity().'); return false; }
if (fbid == PAT_FB.current_user && GM_getValue('ignore_reports_about_me', true)) {
PAT_FB.log('Refusing to flag ourselves (current user ID ' + PAT_FB.current_user + ').');
return false;
}
PAT_FB.log('About to query for reports on ID ' + fbid.toString());
GM_xmlhttpRequest({
'method': 'GET',
'url': PAT_FB.CONFIG.api_url + fbid.toString(),
'headers': {
'Cookie': GM_getValue('pat_fb_cookies')
},
'onload': function (response) {
try {
resp = JSON.parse(response.responseText);
PAT_FB.log('Parsed response from PAT-FB for ' + fbid.toString() + ': ' + response.responseText);
} catch (e) {
PAT_FB.log('Caught error from reply: ' + response.responseText);
return;
}
if (resp.reports) {
el.style.border = PAT_FB.setBorderWidthByReportCount(resp.reports).toString() + 'px solid red';
// Store data in the element.
el.setAttribute('data-num-pat-reports', resp.reports.toString());
el.setAttribute('data-pat-reportee-id', resp.reportee_id.toString());
}
}
});
};
PAT_FB.setBorderWidthByReportCount = function (n) {
if (n < 2) {
n = 1;
} else if (n > 4) {
n = 5;
}
return n;
};