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slack2html
<?
/////////////////////
// slack2html
// by @levelsio
/////////////////////
//
/////////////////////
// WHAT DOES THIS DO?
/////////////////////
//
// Slack lets you export the chat logs (back to the first messages!), even if
// you are a free user (and have a 10,000 user limit)
//
// This is pretty useful for big chat groups (like mine, #nomads), where you
// do wanna see the logs, but can't see them within Slack
//
// Problem is that Slack exports it as JSON files, which is a bit unusable,
// so this script makes it into actual HTML files that look like Slack chats
//
///////////////////
// INSTRUCTIONS
///////////////////
//
// Run this script inside the directory of an extracted (!) Slack export zip
// e.g. "/tmp/#nomads Slack export Aug 25 2015" like this:
// MacBook-Pro:#nomads Slack export Aug 25 2015 mbp$ php slack2html.php
//
// It will then make two dirs:
// /slack2html/json
// /slack2html/html
//
// In the JSON dir it will put each channels chat log combined from all the
// daily logs that Slack outputs (e.g. /channel/2014-11-26.json)
//
// In the HTML dir it will generate HTML files with Slack's typical styling.
// It will also create an index.html that shows all channels
//
///////////////////
// FEEDBACK
///////////////////
//
// Let me know any bugs by tweeting me @levelsio
//
// Hope this helps!
//
// Pieter @levelsio
//
/////////////////////
ini_set('memory_limit', '1024M');
date_default_timezone_set('UTC');
mb_internal_encoding("UTF-8");
error_reporting(E_ERROR);
// <config>
$stylesheet="
* {
font-family:sans-serif;
}
body {
text-align:center;
padding:1em;
}
.messages {
width:100%;
max-width:700px;
text-align:left;
display:inline-block;
}
.messages img {
background-color:rgb(248,244,240);
width:36px;
height:36px;
border-radius:0.2em;
display:inline-block;
vertical-align:top;
margin-right:0.65em;
}
.messages .time {
display:inline-block;
color:rgb(200,200,200);
margin-left:0.5em;
}
.messages .username {
display:inline-block;
font-weight:600;
line-height:1;
}
.messages .message {
display:inline-block;
vertical-align:top;
line-height:1;
width:calc(100% - 3em);
}
.messages .message .msg {
line-height:1.5;
}
";
// </config>
// <compile daily logs into single channel logs>
$files=scandir(__DIR__);
$baseDir=__DIR__.'/../slack2html';
$jsonDir=$baseDir.'/'.'json';
if(!is_dir($baseDir)) mkdir($baseDir);
if(!is_dir($jsonDir)) mkdir($jsonDir);
foreach($files as $channel) {
if($channel=='.' || $channel=='..') continue;
if(is_dir($channel)) {
$channelJsonFile=$jsonDir.'/'.$channel.'.json';
if(file_exists($channelJsonFile)) {
echo "JSON already exists ".$channelJsonFile."\n";
continue;
}
unset($chats);
$chats=array();
echo '====='."\n";
echo 'Combining JSON files for #'.$channel."\n";
echo '====='."\n";
$dates=scandir(__DIR__.'/'.$channel);
foreach($dates as $date) {
if(!is_dir($date)) {
echo '.';
$messages=json_decode(file_get_contents(__DIR__.'/'.$channel.'/'.$date),true);
if(empty($messages)) continue;
foreach($messages as $message) {
array_push($chats,$message);
}
}
}
echo "\n";
file_put_contents($channelJsonFile,json_encode($chats));
echo number_format(count($chats)).' messages exported to '.$channelJsonFile."\n";
}
}
// </compile daily logs into single channel logs>
// <load users file>
$users=json_decode(file_get_contents(__DIR__.'/'.'users.json'),true);
$usersById=array();
foreach($users as $user) {
$usersById[$user['id']]=$user;
}
// </load users file>
// <load channels file>
$channels=json_decode(file_get_contents(__DIR__.'/'.'channels.json'),true);
$channelsById=array();
foreach($channels as $channel) {
$channelsById[$channel['id']]=$channel;
}
// </load channels file>
// <generate html from channel logs>
$htmlDir=$baseDir.'/'.'html';
if(!is_dir($htmlDir)) mkdir($htmlDir);
$channels=scandir($jsonDir);
$channelNames=array();
$mostRecentChannelTimestamps=array();
foreach($channels as $channel) {
if($channel=='.' || $channel=='..') continue;
if(is_dir($channel)) continue;
$mostRecentChannelTimestamp=0;
if($message['ts']>$mostRecentChannelTimestamp) {
$mostRecentChannelTimestamp=$message['ts'];
}
$array=explode('.json',$channel);
$channelName=$array[0];
$channelHtmlFile=$htmlDir.'/'.$channelName.'.html';
if(file_exists($channelHtmlFile)) {
echo "HTML already exists ".$channelJsonFile."\n";
continue;
}
array_push($channelNames,$channelName);
echo '====='."\n";
echo 'Generating HTML for #'.$channelName."\n";
echo '====='."\n";
$messages=json_decode(file_get_contents($jsonDir.'/'.$channel),true);
if(empty($messages)) continue;
$htmlMessages='<html><meta http-equiv="content-type" content="text/html; charset=utf-8"><body><style>'.$stylesheet.'</style><div class="messages">';
foreach($messages as $message) {
if(empty($message)) continue;
if(empty($message['text'])) continue;
echo '.';
// change <@U38A3DE9> into levelsio
if(stripos($message['text'],'<@')!==false) {
$usersInMessage=explode('<@',$message['text']);
foreach($usersInMessage as $userInMessage) {
$array=explode('>',$userInMessage);
$userHandleInBrackets=$array[0];
$array=explode('|',$array[0]);
$userInMessage=$array[0];
$username=$array[1];
if(empty($username)) {
$username=$usersById[$userInMessage]['name'];
}
$message['text']=str_replace('<@'.$userHandleInBrackets.'>','@'.$username,$message['text']);
}
}
// change <#U38A3DE9> into #_chiang-mai
if(stripos($message['text'],'<#')!==false) {
$channelsInMessage=explode('<#',$message['text']);
foreach($channelsInMessage as $channelInMessage) {
$array=explode('>',$channelInMessage);
$channelHandleInBrackets=$array[0];
$array=explode('|',$array[0]);
$channelInMessage=$array[0];
$channelNameInMessage=$array[1];
if(empty($username)) {
$channelNameInMessage=$channelsById[$channelInMessage]['name'];
}
if(!empty($username)) {
$message['text']=str_replace('<#'.$channelHandleInBrackets.'>','#'.$channelNameInMessage,$message['text']);
}
}
}
// change <http://url> into link
if(stripos($message['text'],'<http')!==false) {
$linksInMessage=explode('<http',$message['text']);
foreach($linksInMessage as $linkInMessage) {
$array=explode('>',$linkInMessage);
$linkTotalInBrackets=$array[0];
$array=explode('|',$array[0]);
$linkInMessage=$array[0];
$message['text']=str_replace('<http'.$linkTotalInBrackets.'>','<a href="http'.$linkInMessage.'">http'.$linkInMessage.'</a>',$message['text']);
}
}
// change @levelsio has joined the channel into
// @levelsio\n has joined #channel
if(stripos($message['text'],'has joined the channel')!==false) {
$message['text']=str_replace('the channel','#'.$channelName,$message['text']);
$message['text']=str_replace('@'.$usersById[$message['user']]['name'].' ','',$message['text']);
}
$array=explode('.',$message['ts']);
$time=$array[0];
//$message['text']=utf8_decode($message['text']);
$htmlMessage='';
$htmlMessage.='<div><img src="'.$usersById[$message['user']]['profile']['image_72'].'" /><div class="message"><div class="username">'.$usersById[$message['user']]['name'].'</div><div class="time">'.date('Y-m-d H:i',$message['ts']).'</div><div class="msg">'.$message['text']."</div></div></div><br/>\n";
$htmlMessages.=$htmlMessage;
}
$htmlMessages.='</div></body></html>';
file_put_contents($channelHtmlFile,$htmlMessages);
$mostRecentChannelTimestamps[$channelName]=$mostRecentChannelTimestamp;
echo "\n";
}
asort($mostRecentChannelTimestamps);
$mostRecentChannelTimestamps=array_reverse($mostRecentChannelTimestamps);
// </generate html from channel logs>
// <make index html>
$html='<html><body><style>'.$stylesheet.'</style><div class="messages">';
foreach($mostRecentChannelTimestamps as $channel => $timestamp) {
$html.='<a href="./'.$channel.'.html">#'.$channel.'</a> '.date('Y-m-d H:i',$timestamp).'<br/>'."\n";
}
$html.='</div></body></html>';
file_put_contents($htmlDir.'/index.html',$html);
// </make index html>
?>
Owner

targi commented Jan 10, 2016

  • Changed the original to make it work with Unicode.
  • Renamed the file to slack2html.php.

Please disregard the stray debug code I removed in the final revision.

MrOrz commented Jan 11, 2016

Came across your fork and fortunately it all worked like a charm. Thanks a lot!

It feels surreal to be rescued by a solution that is just published 16 hours ago.

I had a problem about multibyte characters with the original. This helped me a lot! 👍

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