Fix various issues with MySQL

* Updated the mysql2 gem so you can use newer MySQL / MariaDB versions
* Changed the encoding to utf8mb4 to fix astral Unicode
* DB.database_type seems to be just mysql

Gemfile.lock

@@ -12,7 +12,7 @@ GEM
       tilt
     hiredis (0.5.2)
     multi_json (1.10.1)
-    mysql2 (0.3.16)
+    mysql2 (0.4.4)
     pg (0.18.4)
     rack (1.5.2)
     rack-protection (1.5.3)

config/sql/mysql-schema.sql

@@ -9,7 +9,7 @@ CREATE TABLE `irclog` (
         oper_nick VARCHAR(40),
         payload TEXT,
         PRIMARY KEY(`id`)
-) CHARSET=utf8 ENGINE=MyISAM;
+) CHARSET=utf8mb4 ENGINE=MyISAM;
 
 CREATE INDEX `irclog_channel_timestamp_index` ON `irclog` (channel, timestamp);
 CREATE INDEX `irclog_channel_opcode_index` ON `irclog` (channel, opcode);

lib/irclogger.rb

@@ -3,7 +3,7 @@
 require 'sequel'
 
 Config = YAML.load_file(File.join(File.dirname(__FILE__), '..', 'config', 'application.yml'))
-DB     = Sequel.connect(Config['database'])
+DB     = Sequel.connect(Config['database'], :encoding => 'utf8mb4')
 
 require 'irclogger/message'
 require 'irclogger/channel'

lib/irclogger/viewer.rb

@@ -21,7 +21,7 @@ class Viewer < Sinatra::Base
 
     before do
       case DB.database_type
-      when :mysql2
+      when :mysql
         @channels = DB["select channel from irclog group by channel"].map { |r| r[:channel] }
       when :postgres
         # https://wiki.postgresql.org/wiki/Loose_indexscan