Forgot to add the actual unicode I/O filter to the repository (see [753])

1 files changed, 95 insertions, 0 deletions

diff --git a/data/rbot/plugins/unicode.rb b/data/rbot/plugins/unicode.rb
new file mode 100644
index 00000000..9424a91e
--- /dev/null
+++ b/data/rbot/plugins/unicode.rb
@@ -0,0 +1,95 @@
+#-- vim:sw=4:et
+#++
+#
+# :title: Unicode plugin
+#
+# Author:: jsn (Dmitry Kim) <dmitry dot kim at gmail dot org>
+# Copyright:: (C) 2007 Dmitry Kim
+# License:: public domain
+#
+# This plugin adds unicode-awareness to rbot. When it's loaded, all the
+# character strings inside of rbot are assumed to be in proper utf-8
+# encoding. The plugin takes care of translation to/from utf-8 on server IO,
+# if necessary (translation charsets are configurable).
+
+# TODO do we actually want this?
+require 'jcode'
+
+require 'iconv'
+
+class UnicodePlugin < Plugin
+    BotConfig.register BotConfigBooleanValue.new(
+    'encoding.enable', :default => true,
+    :desc => "Support for non-ascii charsets",
+    :on_change => Proc.new { |bot, v| reconfigure_filter(bot) })
+
+    BotConfig.register BotConfigArrayValue.new(
+    'encoding.charsets', :default => ['utf-8', 'cp1252'],
+    :desc => "Ordered list of iconv(3) charsets the bot should try",
+    :on_change => Proc.new { |bot, v| reconfigure_filter(bot) })
+
+    class UnicodeFilter
+        def initialize(oenc, *iencs)
+            o = oenc.dup
+            o += '//ignore' if !o.include?('/')
+            i = iencs[0].dup
+            i += '//ignore' if !i.include?('/')
+            @iencs = iencs.dup
+            @iconvs = @iencs.map { |_| Iconv.new('utf-8', _) }
+            debug "*** o = #{o}, i = #{i}, iencs = #{iencs.inspect}"
+            @default_in = Iconv.new('utf-8', i)
+            @default_out = Iconv.new(o, 'utf-8')
+        end
+
+        def in(data)
+            rv = nil
+            @iconvs.each_with_index { |ic, idx|
+                begin
+                    debug "trying #{@iencs[idx]}"
+                    rv = ic.iconv(data)
+                    break
+                rescue
+                end
+            }
+
+            rv = @default_in.iconv(data) if !rv
+            debug ">> #{rv}"
+            return rv
+        end
+
+        def out(data)
+            rv = @default_out.iconv(data)
+            debug "<< #{rv}"
+            rv
+        end
+    end
+
+
+    def initialize(*a)
+        super
+        @old_kcode = $KCODE
+        self.class.reconfigure_filter(@bot)
+    end
+
+    def cleanup
+        debug "cleaning up encodings"
+        @bot.socket.filter = nil
+        $KCODE = @old_kcode
+    end
+
+    def UnicodePlugin.reconfigure_filter(bot)
+        debug "configuring encodings"
+        enable = bot.config['encoding.enable']
+        if not enable
+            bot.socket.filter = nil
+            $KCODE = @old_kcode
+            return
+        end
+        charsets = bot.config['encoding.charsets']
+        charsets = ['utf-8'] if charsets.empty?
+        bot.socket.filter = UnicodeFilter.new(charsets[0], *charsets)
+        $KCODE = 'u'
+    end
+end
+
+UnicodePlugin.new