X-Git-Url: http://git.scottworley.com/reliable-chat/blobdiff_plain/1f2f75ce702bc3177b89416ff3a32acd9ef4e0f0..4b184c5fc3d493d2b76b50aabb2ce2a65a488f4b:/webclient/rc.html?ds=sidebyside diff --git a/webclient/rc.html b/webclient/rc.html index 3417745..573ee6a 100644 --- a/webclient/rc.html +++ b/webclient/rc.html @@ -1,25 +1,97 @@ <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> - <html xmlns="http://www.w3.org/1999/xhtml"> +<!-- + reliable-chat - multipath chat + Copyright (C) 2012 Scott Worley <sworley@chkno.net> + Copyright (C) 2012 Jason Hibbs <skitch@gmail.com> + + 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/>. +--> <head> <title>Reliable Chat</title> <style type="text/css"><!--/*--><![CDATA[/*><!--*/ - html, body, #outer-table, #history { width: 99.9%; height: 100%; margin: 0; padding: 0 } - #status { background-color: #eef } + html, body { + width: 99.9%; + height: 100%; + margin: 0; + padding: 0; + background-color: #293134; + color: silver; + font-family: monospace; + } + #container { + height: 100%; + } + #status { + width: 100%; + text-align: right; + background-color: #293134; + padding: 5px 5px 5px 0px; + } + #client { + width: 98.5%; + padding: 0px 0px 0px 5px; + height: 50px; + position: fixed; + bottom: 0; + } + #input { + width: 100%; + background-color: #293134; + } #say { width: 100% } - #history { vertical-align: bottom } + #history { + padding: 0px 5px 55px 5px; + vertical-align: bottom + } + .timestamp { + margin-right: 0.8em; + } img { width: 1px; height: 1px; } iframe { display: none } - #status span { margin-right: 2em } - #status span.sad { background-color: #fee } - #status span.happy { background-color: #efe } + #status span { margin-right: 10px; } + #status span.sad { + background-color: #f00; + color: #fff; + border: 1px solid black; + border-radius: 5px; + padding-left: 5px; + padding-right: 5px; + } + #status span.happy { + background-color: #0f0; + color: #000; + border: 1px solid black; + border-radius: 5px; + padding-left: 5px; + padding-right: 5px; + } /*]]>*/--></style> <script type="text/javascript"><!--//--><![CDATA[//><!-- var servers = ['chkno.net', 'rc2.chkno.net', 'echto.net', 'the-wes.com', 'vibrantlogic.com']; - var session = Math.random(); - var seen = {}; + var session = Math.random(); // For outgoing message IDs + var since = {}; // server -> time: For fetch?since= + var seen = {}; // seen_key -> message + var history = []; // List of messages sorted by Time + // Messages have these fields: + // Time: The timestamp. Median of ServerTimes + // ID: Some unique string for deduping + // Text: The text of the message + // ServerTimes: server -> timestamp + // UI: The DOM node for this message in the UI function rcnick() { var nick = localStorage.getItem("nick"); @@ -52,71 +124,146 @@ } } + function rcformattime(t) { + var d = t.getDay(); + d = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"][d]; + var h = t.getHours(); + var m = t.getMinutes(); + var s = t.getSeconds(); + function pad(x) { + return (x < 10 ? "0" : "") + x; + } + return d + " " + pad(h) + ":" + pad(m) + ":" + pad(s); + } + function rcaddmessagetohistory(message) { - var d = document.createElement("div"); - d.appendChild(document.createTextNode(message)); + var message_i; + if (message.Time) { + for (var i = history.length - 1; ; i--) { + if (i < 0 || (history[i].Time && message.Time >= history[i].Time)) { + message_i = i+1; + history.splice(message_i, 0, message); + break; + } + } + } else { + history.push(message); + message_i = history.length-1; + } + + if (!message.UI) { + var timestamp_text = message.Time ? rcformattime(message.Time) : ""; + var timestamp = document.createElement("span"); + timestamp.setAttribute("class", "timestamp"); + timestamp.appendChild(document.createTextNode(timestamp_text)); + message.UI = document.createElement("div"); + message.UI.appendChild(timestamp); + message.UI.appendChild(document.createTextNode(message.Text)); + } var h = document.getElementById("history"); - h.appendChild(d); + if (message_i + 1 < history.length) { + h.insertBefore(message.UI, history[message_i + 1].UI); + } else { + h.appendChild(message.UI); + } window.scrollTo(0, document.body.scrollHeight); - return d; } function make_seen_key(id, text) { return id.replace(/@/g, "@@") + "_@_" + text.replace(/@/g, "@@"); } - function receiveMessage(server, time, id, text) { - var seen_key = make_seen_key(id, text); - if (!(seen_key in seen)) { - seen[seen_key] = true; - rcaddmessagetohistory(text); - for (var i in servers) { - rcchangeserverstatus(servers[i], "sad"); + function rcupdatemessagetime(message) { + // Set message.Time to be the median of message.ServerTimes + var times = []; + for (var i in message.ServerTimes) { + times.push(message.ServerTimes[i]); + } + times.sort(); + if (times.length % 2) { + message.Time = times[(times.length-1)/2]; + } else { + var middle = times.length/2; + var difference = times[middle].getTime() - times[middle-1].getTime(); + message.Time = new Date(times[middle-1].getTime() + difference/2); + } + + // This may have broken history's in-sorted-order invariant + var hi = history.indexOf(message); + if ((history[hi-1] && history[hi-1].Time > message.Time) || + (history[hi+1] && history[hi+1].Time < message.Time)) { + history.splice(hi,1); + rcaddmessagetohistory(message); + } + } + + function rcreceivemessages(server, messages) { + for (var i in messages) { + var m = messages[i]; + m.Time = new Date(m.Time); + var seen_key = make_seen_key(m.ID, m.Text); + if (seen_key in seen) { + seen[seen_key].ServerTimes[server] = m.Time; + rcupdatemessagetime(seen[seen_key]); + } else { + m.ServerTimes = {}; + m.ServerTimes[server] = m.Time; + seen[seen_key] = m; + rcaddmessagetohistory(m); + for (var i in servers) { + rcchangeserverstatus(servers[i], "sad"); + } } + rcchangeserverstatus(server, "happy"); } - rcchangeserverstatus(server, "happy"); } - function receiveMessageEvent(event) - { - for (var i in servers) { - if (event.origin === rcserverbase(servers[i])) { - messages = JSON.parse(event.data); - for (var j in messages) { - if ('Time' in messages[j] && - 'ID' in messages[j] && - 'Text' in messages[j]) { - receiveMessage(servers[i], messages[j]['Time'], messages[j]['ID'], messages[j]['Text']); + function rcfetch(server) { + var delay = 10000; // TODO: Exponential backoff + var xhr = new XMLHttpRequest(); + xhr.onreadystatechange = function() { + if (this.readyState == this.DONE) { + if (this.status == 200) { + var rtxt = this.responseText; + if (rtxt != null) { + var messages = JSON.parse(rtxt); + if (messages != null) { + delay = 40; + if (messages.length >= 1 && "Time" in messages[messages.length-1]) { + since[server] = messages[messages.length-1].Time; + } + rcreceivemessages(server, messages); + } } } + window.setTimeout(rcfetch, delay, server); } } + var uri = rcserverbase(server) + "/fetch"; + if (server in since) { + uri += '?since="' + since[server] + '"'; + } + xhr.open("GET", uri); + xhr.send(); } function rcconnect() { - window.addEventListener("message", receiveMessageEvent, false); for (var i in servers) { - // Create a hidden iframe for same-origin workaround - var iframe = document.createElement("iframe"); - iframe.setAttribute("src", rcserverbase(servers[i]) + "/frame"); - document.body.insertBefore(iframe, document.body.firstChild); + rcfetch(servers[i]); // Status bar entry var status_indicator = document.createElement("span"); status_indicator.appendChild(document.createTextNode(servers[i])); status_indicator.setAttribute("class", "sad"); document.getElementById("status").appendChild(status_indicator); } - if (rcnick() == 'anonymous') { - rcaddmessagetohistory("-!- Set your nick with /nick"); - } } function rcsend(d, message) { - var id = new Date().getTime() + "-" + session + "-" + Math.random(); - seen[make_seen_key(id, message)] = true; + message.ID = new Date().getTime() + "-" + session + "-" + Math.random(); + seen[make_seen_key(message.ID, message.Text)] = message; var path = "/speak" + - "?id=" + encodeURIComponent(id) + - "&text=" + encodeURIComponent(message); + "?id=" + encodeURIComponent(message.ID) + + "&text=" + encodeURIComponent(message.Text); for (var i in servers) { var uri = rcserverbase(servers[i]) + path; var img = document.createElement("img"); @@ -125,30 +272,29 @@ } } + function rcinput(input) { + var message; + var re = /^\/([a-z]+) (.*)/ + var match = re.exec(input); + if (match && match[1] == 'me') { + message = "* " + rcnick() + " " + match[2]; + } else if (match && match[1] == 'nick') { + message = "*** " + rcnick() + " is now known as " + match[2]; + rcsetnick(match[2]); + } else { + message = "<" + rcnick() + "> " + input; + } + + var m = {'Text': message, 'ServerTimes': {}}; + rcaddmessagetohistory(m); + rcsend(m.UI, m); + } + function rckeydown(event) { if (event.keyCode == 13) { - var input = document.input.say.value; + rcinput(document.input.say.value); document.input.say.value = ""; - // Check nick change - var message; - var re = /^\/nick (.*)/; - var match = re.exec(input); - if (match) { - message = "*** " + rcnick() + " is now known as " + match[1]; - rcsetnick(match[1]); - } else { - message = "<" + rcnick() + "> " + input; - } - - // Remind people to set their nick - if (rcnick() == 'anonymous') { - rcaddmessagetohistory("-!- Set your nick with /nick"); - } - - // Say the message - var d = rcaddmessagetohistory(message); - rcsend(d, message); } } //--><!]]></script> @@ -156,12 +302,15 @@ </head> <body onload="rcconnect()"> - <table id="outer-table"> - <tr><td id="history"></td></tr> - <tr><td id="status"> </td></tr> - <tr><td><form name="input" onsubmit="return false" autocomplete="off"> - <input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input> - </form></td></tr> - </table> + <div id="container"> + <div id="history"></div> + <div id="client"> + <div id="input"> + <form name="input" onsubmit="return false" autocomplete="off"> + <input id="say" onkeydown="return rckeydown(event)" autocomplete="off" autofocus="autofocus"></input> + </form></div> + <div id="status"> </div> + </div> + </div> </body> </html>