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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// @license magnet:?xt=urn:btih:3877d6d54b3accd4bc32f8a48bf32ebc0901502a&dn=mpl-2.0.txt MPL 2.0
document.addEventListener('DOMContentLoaded', function () {
'use strict';
/**
* 'Share' widget for GNU social
* http://code.chromic.org/project/view/2/
*
* We make a few assumptions about the target instance:
* 1) The API root is in the default location
* 2) Fancy URLs are enabled
* 3) CORS is allowed
* 4) The Bookmark plugin is enabled
*
* If 1), 3) or 4) are wrong, we fall back to a regular
* notice (instead of a bookmark notice)
*
* If 2) is wrong the user will be directed to a 404 :(
*/
// TODO: input sanitation [1], [2]
// TODO: server-side fallback if JS is disabled
var createForm,
bindClicks,
frm,
shareAsNotice,
shareAsBookmark,
extractURLParams,
shareURL,
shareTitle,
closest,
i18n = window.i18n;
/**
* Internationalization
*/
if (i18n === undefined) {
i18n = {
invalidId: 'The account id provided is invalid',
yourAcctId: 'Your account ID:',
idPlaceholder: 'user@example.org',
shareAsBookmark: 'Share as a bookmark'
};
}
shareAsNotice = function (title, url, domain) {
window.open('http://' + domain + '/notice/new?status_textarea=' + title + ' ' + url); // [1]
};
shareAsBookmark = function (title, url, domain) {
window.open('http://' + domain + '/main/bookmark/new?url=' + url + '&title=' + title); // [2]
};
/**
* Extract parameters from query string
*
* ex:
* ?foo=bar&baz=test
* will return:
* {foo: 'bar', baz: 'test'}
*/
extractURLParams = function (queryStr) {
var parts = queryStr.substr(1).split('&'),
i, len, keyVal, params = {};
for (i = 0, len = parts.length; i < len; i += 1) {
keyVal = parts[i].split('=');
params[keyVal[0]] = keyVal[1];
}
return params;
};
// Create the form that we'll re-use throughout the page
createForm = function () {
var err = document.createElement('div');
err.setAttribute('class', 'gs-share-err');
err.setAttribute('tabindex', '-1');
err.setAttribute('aria-hidden', 'true');
err.textContent = i18n.invalidId;
frm = document.createElement('form');
frm.setAttribute('class', 'gs-share-form');
frm.setAttribute('tabindex', '-1');
frm.setAttribute('aria-hidden', 'true');
frm.innerHTML = '<label for="gs-account">' + i18n.yourAcctId + '</label>' +
'<input type="text" id="gs-account" placeholder="' + i18n.idPlaceholder + '" />' +
'<input type="checkbox" id="gs-bookmark" /> <label for="gs-bookmark">' + i18n.shareAsBookmark + '</label>' +
'<input type="submit" value="Share"/>';
frm.insertBefore(err, frm.firstChild);
// Submit handler
frm.addEventListener('submit', function (e) {
e.preventDefault();
var accountParts = document.getElementById('gs-account').value.split('@'),
username, domain, xhr, bookmarkURL;
if (accountParts.length === 2) {
err.setAttribute('aria-hidden', 'true');
username = accountParts[0];
domain = accountParts[1];
bookmarkURL = 'http://' + domain + '/api/bookmarks/' + username + '.json';
// Try bookmark
if (document.getElementById('gs-bookmark').checked) {
xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status === 200) { // Success
shareAsBookmark(shareTitle, shareURL, domain);
} else { // Failure, fallback to regular notice
shareAsNotice(shareTitle, shareURL, domain);
}
}
};
xhr.open('GET', bookmarkURL, true);
xhr.send();
} else { // Regular notice
shareAsNotice(shareTitle, shareURL, domain);
}
} else { // Invalid account id
err.setAttribute('aria-hidden', 'false');
err.focus();
}
});
// Keydown handler
frm.addEventListener('keydown', function (e) {
if (e.keyCode === 27) { // Escape key closes the dialog
frm.parentElement.getElementsByClassName('js-gs-share')[0].focus();
frm.setAttribute('aria-hidden', 'true');
}
});
document.body.appendChild(frm);
};
/**
* Something similar to jQuery.closest
*
* Given `elm`, return the closest parent with class `cls`
* or false if there is no matching ancestor.
*/
closest = function (elm, cls) {
while (elm !== document) {
if (elm.classList.contains(cls)) {
return elm;
}
elm = elm.parentNode;
}
return false;
};
bindClicks = function () {
document.addEventListener('click', function (e) {
var target = e.target,
urlParams,
lnk = closest(target, 'js-gs-share');
// Don't do anything on right/middle click or if ctrl or shift was pressed while left-clicking
if (!e.button && !e.ctrlKey && !e.shiftKey && lnk) {
e.preventDefault();
// Check for submission information in href first
if (lnk.search !== undefined) {
urlParams = extractURLParams(lnk.search);
shareURL = urlParams.url;
shareTitle = urlParams.title;
} else { // If it's not there, try data-* attributes. If not, use current document url and title
shareURL = lnk.getAttribute('data-url') || window.location.href;
shareTitle = lnk.getAttribute('data-title') || document.title;
}
// Move form after the clicked link
lnk.parentNode.appendChild(frm);
// Show form
frm.setAttribute('aria-hidden', 'false');
// Focus on form
frm.focus();
} else if (!frm.contains(target)) {
frm.setAttribute('aria-hidden', 'true');
}
});
};
// Flag that js is enabled
document.body.classList.add('js-gs-share-enabled');
createForm();
bindClicks();
});
// @license-end
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