From a371ff629d20c7f61cdfe8958dd02f2dfa73fe40 Mon Sep 17 00:00:00 2001
From: calzoneman <calzoneman@gmail.com>
Date: Tue, 6 Aug 2013 14:20:47 -0400
Subject: [PATCH] Allow channel admins to read channel logs

---
 channel.js                       | 60 ++++++++++++++++++++++++++++++++
 user.js                          |  6 ++++
 www/assets/js/callbacks.js       | 13 +++++++
 www/assets/js/channelsettings.js |  4 +++
 www/assets/js/util.js            |  1 +
 www/channeloptions.html          |  4 +++
 6 files changed, 88 insertions(+)

diff --git a/channel.js b/channel.js
index 90f886f6..b3c8ecef 100644
--- a/channel.js
+++ b/channel.js
@@ -278,6 +278,66 @@ function incrementalDump(chan) {
     }
 }
 
+Channel.prototype.readLog = function (filterIp, callback) {
+    var maxLen = 100000; // Most recent 100KB
+    var file = this.logger.filename;
+    fs.stat(file, function (err, data) {
+        if(err) {
+            callback(err, null);
+            return;
+        }
+
+        var start = data.size - maxLen;
+        if(start < 0) {
+            start = 0;
+        }
+        var end = data.size - 1;
+
+        var rs = fs.createReadStream(file, {
+            start: start,
+            end: end
+        });
+
+        var buffer = "";
+        rs.on("data", function (data) {
+            buffer += data;
+        });
+
+        rs.on("end", function () {
+            if(filterIp) {
+                buffer = buffer.replace(
+                    /(\d{1,3}\.){2}(\d{1,3})\.(\d{1,3})/g,
+                    "x.x.$2.$3"
+                );
+            }
+
+            callback(false, buffer);
+        });
+    });
+}
+
+Channel.prototype.tryReadLog = function (user) {
+    if(user.rank < 3)
+        return;
+
+    var filterIp = true;
+    if(user.global_rank >= 255)
+        filterIp = false;
+
+    this.readLog(filterIp, function (err, data) {
+        if(err) {
+            user.socket.emit("readChanLog", {
+                success: false
+            });
+        } else {
+            user.socket.emit("readChanLog", {
+                success: true,
+                data: data
+            });
+        }
+    });
+}
+
 Channel.prototype.tryRegister = function(user) {
     if(this.registered) {
         ActionLog.record(user.ip, user.name, "channel-register-failure", [
diff --git a/user.js b/user.js
index 47d2c225..f9924a64 100644
--- a/user.js
+++ b/user.js
@@ -521,6 +521,12 @@ User.prototype.initCallbacks = function() {
         });
     }.bind(this));
 
+    this.socket.on("readChanLog", function () {
+        if(this.channel !== null) {
+            this.channel.tryReadLog(this);
+        }
+    }.bind(this));
+
     this.socket.on("acp-init", function() {
         if(this.global_rank >= Rank.Siteadmin)
             this.server.acp.init(this);
diff --git a/www/assets/js/callbacks.js b/www/assets/js/callbacks.js
index 803a4e07..7c2945e3 100644
--- a/www/assets/js/callbacks.js
+++ b/www/assets/js/callbacks.js
@@ -497,6 +497,19 @@ Callbacks = {
         );
     },
 
+    readChanLog: function (data) {
+        var log = $("#chanlog_contents");
+        if(log.length == 0)
+            return;
+
+        if(data.success) {
+            log.text(data.data);
+        } else {
+            log.text("Error reading channel log");
+        }
+        log.scrollTop(log.prop("scrollHeight"));
+    },
+
     voteskip: function(data) {
         if(data.count > 0) {
             $("#voteskip").text("Voteskip ("+data.count+"/"+data.need+")");
diff --git a/www/assets/js/channelsettings.js b/www/assets/js/channelsettings.js
index 714b91be..90e37069 100644
--- a/www/assets/js/channelsettings.js
+++ b/www/assets/js/channelsettings.js
@@ -45,6 +45,10 @@
     $("#show_channelranks").click(function() {
         socket.emit("requestChannelRanks");
     });
+    clickHandler("#show_chanlog", "#chanlog");
+    $("#show_chanlog").click(function () {
+        socket.emit("readChanLog");
+    });
 
     genPermissionsEditor();
 
diff --git a/www/assets/js/util.js b/www/assets/js/util.js
index 9b1179ba..2f56d101 100644
--- a/www/assets/js/util.js
+++ b/www/assets/js/util.js
@@ -812,6 +812,7 @@ function handleModPermissions() {
     setVisible("#jsedit_tab", CLIENT.rank >= 3);
     setVisible("#filteredit_tab", hasPermission("filteredit"));
     setVisible("#channelranks_tab", CLIENT.rank >= 3);
+    setVisible("#chanlog_tab", CLIENT.rank >= 3);
     setVisible("#chanopts_unregister_wrap", CLIENT.rank >= 10);
 }
 
diff --git a/www/channeloptions.html b/www/channeloptions.html
index 4af0e432..5af062d8 100644
--- a/www/channeloptions.html
+++ b/www/channeloptions.html
@@ -15,6 +15,7 @@
         <li id="banlist_tab"><a href="javascript:void(0);" id="show_banlist">Ban List</a></li>
         <li id="channelranks_tab"><a href="javascript:void(0);" id="show_channelranks">Channel Ranks</a></li>
         <li id="loginhistory_tab"><a href="javascript:void(0);" id="show_loginhistory">Recent Connections</a></li>
+        <li id="chanlog_tab"><a href="javascript:void(0);" id="show_chanlog">Channel Log</a></li>
     </ul>
 </div>
 <hr>
@@ -223,3 +224,6 @@
         </thead>
     </table>
 </div>
+<div id="chanlog" class="span12">
+    <pre id="chanlog_contents" style="max-height: 400px; overflow-y: scroll"></pre>
+</div>