gnu-social/plugins/Realtime/realtimeupdate.js

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/*
* StatusNet - a distributed open-source microblogging tool
* Copyright (C) 2009-2011, StatusNet, Inc.
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*
* Add a notice encoded as JSON into the current timeline
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* @category Plugin
* @package StatusNet
* @author Evan Prodromou <evan@status.net>
* @author Sarven Capadisli <csarven@status.net>
* @copyright 2009-2011 StatusNet, Inc.
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
/**
* This is the UI portion of the Realtime plugin base class, handling
* queueing up and displaying of notices that have been received through
* other code in one of the subclassed plugin implementations such as
* Meteor or Orbited.
*
* Notices are passed in as JSON objects formatted per the Twitter-compatible
* API.
*
* @todo Currently we duplicate a lot of formatting and layout code from
* the PHP side of StatusNet, which makes it very difficult to maintain
* this package. Internationalization as well as newer features such
* as location data, customized source links for OStatus profiles,
* and image thumbnails are not yet supported in Realtime yet because
* they have not been implemented here.
*/
RealtimeUpdate = {
_userid: 0,
_showurl: '',
_keepaliveurl: '',
_closeurl: '',
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_updatecounter: 0,
_maxnotices: 50,
_windowhasfocus: true,
_documenttitle: '',
_paused:false,
_queuedNotices:[],
/**
* Initialize the Realtime plugin UI on a page with a timeline view.
*
* This function is called from a JS fragment inserted by the PHP side
* of the Realtime plugin, and provides us with base information
* needed to build a near-replica of StatusNet's NoticeListItem output.
*
* Once the UI is initialized, a plugin subclass will need to actually
* feed data into the RealtimeUpdate object!
*
* @param {int} userid: local profile ID of the currently logged-in user
* @param {String} showurl: URL for shownotice action, used when fetching formatting notices.
* This URL contains a stub value of 0000000000 which will be replaced with the notice ID.
*
* @access public
*/
init: function(userid, showurl)
{
RealtimeUpdate._userid = userid;
RealtimeUpdate._showurl = showurl;
RealtimeUpdate._documenttitle = document.title;
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$(window).bind('focus', function() {
RealtimeUpdate._windowhasfocus = true;
// Clear the counter on the window title when we focus in.
RealtimeUpdate._updatecounter = 0;
RealtimeUpdate.removeWindowCounter();
});
$(window).bind('blur', function() {
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$('#notices_primary .notice').removeClass('mark-top');
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$('#notices_primary .notice:first').addClass('mark-top');
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// While we're in the background, received messages will increment
// a counter that we put on the window title. This will cause some
// browsers to also flash or mark the tab or window title bar until
// you seek attention (eg Firefox 4 pinned app tabs).
RealtimeUpdate._windowhasfocus = false;
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return false;
});
},
/**
* Accept a notice in a Twitter-API JSON style and either show it
* or queue it up, depending on whether the realtime display is
* active.
*
* The meat of a Realtime plugin subclass is to provide a substrate
* transport to receive data and shove it into this function. :)
*
* Note that the JSON data is extended from the standard API return
* with additional fields added by RealtimePlugin's PHP code.
*
* @param {Object} data: extended JSON API-formatted notice
*
* @access public
*/
receive: function(data)
{
if (RealtimeUpdate.isNoticeVisible(data.id)) {
// Probably posted by the user in this window, and so already
// shown by the AJAX form handler. Ignore it.
return;
}
if (RealtimeUpdate._paused === false) {
RealtimeUpdate.purgeLastNoticeItem();
RealtimeUpdate.insertNoticeItem(data);
}
else {
RealtimeUpdate._queuedNotices.push(data);
RealtimeUpdate.updateQueuedCounter();
}
RealtimeUpdate.updateWindowCounter();
},
/**
* Add a visible representation of the given notice at the top of
* the current timeline.
*
* If the notice is already in the timeline, nothing will be added.
*
* @param {Object} data: extended JSON API-formatted notice
*
* @fixme while core UI JS code is used to activate the AJAX UI controls,
* the actual production of HTML (in makeNoticeItem and its subs)
* duplicates core code without plugin hook points or i18n support.
*
* @access private
*/
insertNoticeItem: function(data) {
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// Don't add it if it already exists
if (RealtimeUpdate.isNoticeVisible(data.id)) {
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return;
}
RealtimeUpdate.makeNoticeItem(data, function(noticeItem) {
// Check again in case it got shown while we were waiting for data...
if (RealtimeUpdate.isNoticeVisible(data.id)) {
return;
}
var noticeItemID = $(noticeItem).attr('id');
var list = $("#notices_primary .notices:first")
var prepend = true;
var threaded = list.hasClass('threaded-notices');
if (threaded && data.in_reply_to_status_id) {
// aho!
var parent = $('#notice-' + data.in_reply_to_status_id);
if (parent.length == 0) {
// @todo fetch the original, insert it, and finish the rest
} else {
// Check the parent notice to make sure it's not a reply itself.
// If so, use it's parent as the parent.
var parentList = parent.closest('.notices');
if (parentList.hasClass('threaded-replies')) {
parent = parentList.closest('.notice');
}
list = parent.find('.threaded-replies');
if (list.length == 0) {
list = $('<ul class="notices threaded-replies xoxo"></ul>');
parent.append(list);
SN.U.NoticeInlineReplyPlaceholder(parent);
}
prepend = false;
}
}
var newNotice = $(noticeItem);
if (prepend) {
list.prepend(newNotice);
} else {
var placeholder = list.find('li.notice-reply-placeholder')
if (placeholder.length > 0) {
newNotice.insertBefore(placeholder)
} else {
newNotice.appendTo(list);
}
}
newNotice.css({display:"none"}).fadeIn(1000);
SN.U.NoticeReplyTo($('#'+noticeItemID));
SN.U.NoticeWithAttachment($('#'+noticeItemID));
});
},
/**
* Check if the given notice is visible in the timeline currently.
* Used to avoid duplicate processing of notices that have been
* displayed by other means.
*
* @param {number} id: notice ID to check
*
* @return boolean
*
* @access private
*/
isNoticeVisible: function(id) {
return ($("#notice-"+id).length > 0);
},
/**
* Trims a notice off the end of the timeline if we have more than the
* maximum number of notices visible.
*
* @access private
*/
purgeLastNoticeItem: function() {
if ($('#notices_primary .notice').length > RealtimeUpdate._maxnotices) {
$("#notices_primary .notice:last").remove();
}
},
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/**
* If the window/tab is in background, increment the counter of newly
* received notices and append it onto the window title.
*
* Has no effect if the window is in foreground.
*
* @access private
*/
updateWindowCounter: function() {
if (RealtimeUpdate._windowhasfocus === false) {
RealtimeUpdate._updatecounter += 1;
document.title = '('+RealtimeUpdate._updatecounter+') ' + RealtimeUpdate._documenttitle;
}
},
/**
* Clear the background update counter from the window title.
*
* @access private
*
* @fixme could interfere with anything else trying similar tricks
*/
removeWindowCounter: function() {
document.title = RealtimeUpdate._documenttitle;
},
/**
* Builds a notice HTML block from JSON API-style data;
* loads data from server, so runs async.
*
* @param {Object} data: extended JSON API-formatted notice
* @param {function} callback: function(DOMNode) to receive new code
*
* @access private
*/
makeNoticeItem: function(data, callback)
{
var url = RealtimeUpdate._showurl.replace('0000000000', data.id);
$.get(url, {ajax: 1}, function(data, textStatus, xhr) {
var notice = $('li.notice:first', data);
if (notice.length) {
var node = document._importNode(notice[0], true);
callback(node);
}
});
},
/**
* Creates a favorite button.
*
* @param {number} id: notice ID to work with
* @param {String} session_key: session token for form CSRF protection
* @return {String} HTML fragment
*
* @fixme this replicates core StatusNet code, making maintenance harder
* @fixme sloppy HTML building (raw concat without escaping)
* @fixme no i18n support
*
* @access private
*/
makeFavoriteForm: function(id, session_key)
{
var ff;
ff = "<form id=\"favor-"+id+"\" class=\"form_favor\" method=\"post\" action=\""+RealtimeUpdate._favorurl+"\">"+
"<fieldset>"+
"<legend>Favor this notice</legend>"+
"<input name=\"token\" type=\"hidden\" id=\"token-"+id+"\" value=\""+session_key+"\"/>"+
"<input name=\"notice\" type=\"hidden\" id=\"notice-n"+id+"\" value=\""+id+"\"/>"+
"<input type=\"submit\" id=\"favor-submit-"+id+"\" name=\"favor-submit-"+id+"\" class=\"submit\" value=\"Favor\" title=\"Favor this notice\"/>"+
"</fieldset>"+
"</form>";
return ff;
},
/**
* Creates a reply button.
*
* @param {number} id: notice ID to work with
* @param {String} nickname: nick of the user to whom we are replying
* @return {String} HTML fragment
*
* @fixme this replicates core StatusNet code, making maintenance harder
* @fixme sloppy HTML building (raw concat without escaping)
* @fixme no i18n support
*
* @access private
*/
makeReplyLink: function(id, nickname)
{
var rl;
rl = "<a class=\"notice_reply\" href=\""+RealtimeUpdate._replyurl+"?replyto="+nickname+"\" title=\"Reply to this notice\">Reply <span class=\"notice_id\">"+id+"</span></a>";
return rl;
},
/**
* Creates a repeat button.
*
* @param {number} id: notice ID to work with
* @param {String} session_key: session token for form CSRF protection
* @return {String} HTML fragment
*
* @fixme this replicates core StatusNet code, making maintenance harder
* @fixme sloppy HTML building (raw concat without escaping)
* @fixme no i18n support
*
* @access private
*/
makeRepeatForm: function(id, session_key)
{
var rf;
rf = "<form id=\"repeat-"+id+"\" class=\"form_repeat\" method=\"post\" action=\""+RealtimeUpdate._repeaturl+"\">"+
"<fieldset>"+
"<legend>Repeat this notice?</legend>"+
"<input name=\"token\" type=\"hidden\" id=\"token-"+id+"\" value=\""+session_key+"\"/>"+
"<input name=\"notice\" type=\"hidden\" id=\"notice-"+id+"\" value=\""+id+"\"/>"+
"<input type=\"submit\" id=\"repeat-submit-"+id+"\" name=\"repeat-submit-"+id+"\" class=\"submit\" value=\"Yes\" title=\"Repeat this notice\"/>"+
"</fieldset>"+
"</form>";
return rf;
},
/**
* Creates a delete button.
*
* @param {number} id: notice ID to create a delete link for
* @return {String} HTML fragment
*
* @fixme this replicates core StatusNet code, making maintenance harder
* @fixme sloppy HTML building (raw concat without escaping)
* @fixme no i18n support
*
* @access private
*/
makeDeleteLink: function(id)
{
var dl, delurl;
delurl = RealtimeUpdate._deleteurl.replace("0000000000", id);
dl = "<a class=\"notice_delete\" href=\""+delurl+"\" title=\"Delete this notice\">Delete</a>";
return dl;
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},
/**
* Adds a control widget at the top of the timeline view, containing
* pause/play and popup buttons.
*
* @param {String} url: full URL to the popup window variant of this timeline page
* @param {String} timeline: string key for the timeline (eg 'public' or 'evan-all')
* @param {String} path: URL to the base directory containing the Realtime plugin,
* used to fetch resources if needed.
*
* @todo timeline and path parameters are unused and probably should be removed.
*
* @access private
*/
initActions: function(url, timeline, path, keepaliveurl, closeurl)
{
$('#notices_primary').prepend('<ul id="realtime_actions"><li id="realtime_playpause"></li><li id="realtime_timeline"></li></ul>');
RealtimeUpdate._pluginPath = path;
RealtimeUpdate._keepaliveurl = keepaliveurl;
RealtimeUpdate._closeurl = closeurl;
// On unload, let the server know we're no longer listening
$(window).unload(function() {
$.ajax({
type: 'POST',
url: RealtimeUpdate._closeurl});
});
setInterval(function() {
$.ajax({
type: 'POST',
url: RealtimeUpdate._keepaliveurl});
}, 15 * 60 * 1000 ); // every 15 min; timeout in 30 min
RealtimeUpdate.initPlayPause();
RealtimeUpdate.initAddPopup(url, timeline, RealtimeUpdate._pluginPath);
},
/**
* Initialize the state of the play/pause controls.
*
* If the browser supports the localStorage interface, we'll attempt
* to retrieve a pause state from there; otherwise we default to paused.
*
* @access private
*/
initPlayPause: function()
{
if (typeof(localStorage) == 'undefined') {
RealtimeUpdate.showPause();
}
else {
if (localStorage.getItem('RealtimeUpdate_paused') === 'true') {
RealtimeUpdate.showPlay();
}
else {
RealtimeUpdate.showPause();
}
}
},
/**
* Switch the realtime UI into paused state.
* Uses SN.msg i18n system for the button label and tooltip.
*
* State will be saved and re-used next time if the browser supports
* the localStorage interface (via setPause).
*
* @access private
*/
showPause: function()
{
RealtimeUpdate.setPause(false);
RealtimeUpdate.showQueuedNotices();
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RealtimeUpdate.addNoticesHover();
$('#realtime_playpause').remove();
$('#realtime_actions').prepend('<li id="realtime_playpause"><button id="realtime_pause" class="pause"></button></li>');
$('#realtime_pause').text(SN.msg('realtime_pause'))
.attr('title', SN.msg('realtime_pause_tooltip'))
.bind('click', function() {
RealtimeUpdate.removeNoticesHover();
RealtimeUpdate.showPlay();
return false;
});
},
/**
* Switch the realtime UI into play state.
* Uses SN.msg i18n system for the button label and tooltip.
*
* State will be saved and re-used next time if the browser supports
* the localStorage interface (via setPause).
*
* @access private
*/
showPlay: function()
{
RealtimeUpdate.setPause(true);
$('#realtime_playpause').remove();
$('#realtime_actions').prepend('<li id="realtime_playpause"><span id="queued_counter"></span> <button id="realtime_play" class="play"></button></li>');
$('#realtime_play').text(SN.msg('realtime_play'))
.attr('title', SN.msg('realtime_play_tooltip'))
.bind('click', function() {
RealtimeUpdate.showPause();
return false;
});
},
/**
* Update the internal pause/play state.
* Do not call directly; use showPause() and showPlay().
*
* State will be saved and re-used next time if the browser supports
* the localStorage interface.
*
* @param {boolean} state: true = paused, false = not paused
*
* @access private
*/
setPause: function(state)
{
RealtimeUpdate._paused = state;
if (typeof(localStorage) != 'undefined') {
localStorage.setItem('RealtimeUpdate_paused', RealtimeUpdate._paused);
}
},
/**
* Go through notices we have previously received while paused,
* dumping them into the timeline view.
*
* @fixme long timelines are not trimmed here as they are for things received while not paused
*
* @access private
*/
showQueuedNotices: function()
{
$.each(RealtimeUpdate._queuedNotices, function(i, n) {
RealtimeUpdate.insertNoticeItem(n);
});
RealtimeUpdate._queuedNotices = [];
RealtimeUpdate.removeQueuedCounter();
},
/**
* Update the Realtime widget control's counter of queued notices to show
* the current count. This will be called after receiving and queueing
* a notice while paused.
*
* @access private
*/
updateQueuedCounter: function()
{
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$('#realtime_playpause #queued_counter').html('('+RealtimeUpdate._queuedNotices.length+')');
},
/**
* Clear the Realtime widget control's counter of queued notices.
*
* @access private
*/
removeQueuedCounter: function()
{
$('#realtime_playpause #queued_counter').empty();
},
/**
* Set up event handlers on the timeline view to automatically pause
* when the mouse is over the timeline, as this indicates the user's
* desire to interact with the UI. (Which is hard to do when it's moving!)
*
* @access private
*/
addNoticesHover: function()
{
$('#notices_primary .notices').hover(
function() {
if (RealtimeUpdate._paused === false) {
RealtimeUpdate.showPlay();
}
},
function() {
if (RealtimeUpdate._paused === true) {
RealtimeUpdate.showPause();
}
}
);
},
/**
* Tear down event handlers on the timeline view to automatically pause
* when the mouse is over the timeline.
*
* @fixme this appears to remove *ALL* event handlers from the timeline,
* which assumes that nobody else is adding any event handlers.
* Sloppy -- we should only remove the ones we add.
*
* @access private
*/
removeNoticesHover: function()
{
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$('#notices_primary .notices').unbind();
},
/**
* UI initialization, to be called from Realtime plugin code on regular
* timeline pages.
*
* Adds a button to the control widget at the top of the timeline view,
* allowing creation of a popup window with a more compact real-time
* view of the current timeline.
*
* @param {String} url: full URL to the popup window variant of this timeline page
* @param {String} timeline: string key for the timeline (eg 'public' or 'evan-all')
* @param {String} path: URL to the base directory containing the Realtime plugin,
* used to fetch resources if needed.
*
* @todo timeline and path parameters are unused and probably should be removed.
*
* @access public
*/
initAddPopup: function(url, timeline, path)
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{
$('#realtime_timeline').append('<button id="realtime_popup"></button>');
$('#realtime_popup').text(SN.msg('realtime_popup'))
.attr('title', SN.msg('realtime_popup_tooltip'))
.bind('click', function() {
window.open(url,
'',
'toolbar=no,resizable=yes,scrollbars=yes,status=no,menubar=no,personalbar=no,location=no,width=500,height=550');
return false;
});
},
/**
* UI initialization, to be called from Realtime plugin code on popup
* compact timeline pages.
*
* Sets up links in notices to open in a new window.
*
* @fixme fails to do the same for UI links like context view which will
* look bad in the tiny chromeless window.
*
* @access public
*/
initPopupWindow: function()
{
$('.notices .entry-title a, .notices .entry-content a').bind('click', function() {
window.open(this.href, '');
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return false;
});
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$('#showstream .entity_profile').css({'width':'69%'});
}
}