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#-- vim:sw=2:et
#++
#
# :title: DICT (RFC 2229) Protocol Client Plugin for rbot
#
# Author:: Yaohan Chen <yaohan.chen@gmail.com>
# Copyright:: (C) 2007 Yaohan Chen
# License:: GPL v2
#
# Looks up words on a DICT server. DEFINE and MATCH commands, as well as listing of
# databases and strategies are supported.
#
# TODO
# Improve output format
# requires Ruby/DICT <http://www.caliban.org/ruby/ruby-dict.shtml>
require 'dict'
class ::String
# Returns a new string truncated to length 'to'
# If ellipsis is not given, that will just be the first n characters,
# Else it will return a string in the form <head><ellipsis><tail>
# The total length of that string will not exceed 'to'.
# If tail is an Integer, the tail will be exactly 'tail' characters,
# if it is a Float/Rational tails length will be (to*tail).ceil.
#
# Contributed by apeiros
def truncate(to=32, ellipsis='…', tail=0.3)
str = split(//)
return str.first(to).join('') if !ellipsis or str.length <= to
to -= ellipsis.split(//).length
tail = (tail*to).ceil unless Integer === tail
to -= tail
"#{str.first(to)}#{ellipsis}#{str.last(tail)}"
end
end
class ::Definition
def headword
definition[0].strip
end
def body
definition[1..-1].join.gsub(/\s+/, ' ').strip
end
end
class DictClientPlugin < Plugin
BotConfig.register BotConfigStringValue.new('dictclient.server',
:default => 'dict.org',
:desc => 'Hostname or hostname:port of the DICT server used to lookup words')
BotConfig.register BotConfigIntegerValue.new('dictclient.max_defs_before_collapse',
:default => 4,
:desc => 'When multiple databases reply a number of definitions that above this limit, only the database names will be listed. Otherwise, the full definitions from each database are replied')
BotConfig.register BotConfigIntegerValue.new('dictclient.max_length_per_def',
:default => 200,
:desc => 'Each definition is truncated to this length')
BotConfig.register BotConfigStringValue.new('dictclient.headword_format',
:default => "#{Bold}<headword>#{Bold}",
:desc => 'Format of headwords; <word> will be replaced with the actual word')
BotConfig.register BotConfigStringValue.new('dictclient.database_format',
:default => "#{Underline}<database>#{Underline}",
:desc => 'Format of database names; <database> will be replaced with the database name')
BotConfig.register BotConfigStringValue.new('dictclient.definition_format',
:default => '<headword>: <definition> -<database>',
:desc => 'Format of definitions. <word> will be replaced with the formatted headword, <def> will be replaced with the truncated definition, and <database> with the formatted database name')
BotConfig.register BotConfigStringValue.new('dictclient.match_format',
:default => '<matches>––<database>',
:desc => 'Format of match results. <matches> will be replaced with the formatted headwords, <database> with the formatted database name')
def initialize
super
end
# create a DICT object, which is passed to the block. after the block finishes,
# the DICT object is automatically disconnected. the return value of the block
# is returned from this method.
# if an IRC message argument is passed, the error message will be replied
def with_dict(m=nil &block)
server, port = @bot.config['dictclient.server'].split ':' if @bot.config['dictclient.server']
server ||= 'dict.org'
port ||= DICT::DEFAULT_PORT
ret = nil
begin
dict = DICT.new(server, port)
ret = yield dict
dict.disconnect
rescue ConnectError
m.reply 'An error occured connecting to the DICT server. Check the dictclient.server configuration or retry later' if m
rescue ProtocolError
m.reply 'A protocol error occured' if m
rescue DICTError
m.reply 'An error occured' if m
end
ret
end
def format_headword(w)
@bot.config['dictclient.headword_format'].gsub '<headword>', w
end
def format_database(d)
@bot.config['dictclient.database_format'].gsub '<database>', d
end
def cmd_define(m, params)
phrase = params[:phrase].to_s
results = with_dict(m) {|d| d.define(params[:database], params[:phrase])}
m.reply(
if results
# only list database headers if definitions come from different databases and
# the number of definitions is above dictclient.max_defs_before_collapse
if results.any? {|r| r.database != results[0].database} &&
results.length > @bot.config['dictclient.max_defs_before_collapse']
"Definitions for #{format_headword phrase} were found in #{
results.collect {|r| r.database}.uniq.collect {|d|
format_database d}.join ', '
}. Specify database to view full result."
# otherwise display the definitions
else
results.collect {|r|
@bot.config['dictclient.definition_format'].gsub(
'<headword>', format_headword(r.headword)
).gsub(
'<database>', format_database(r.database)
).gsub(
'<definition>', r.body.truncate(@bot.config['dictclient.max_length_per_def'])
)
}.join ' '
end
else
"No definition for #{format_headword phrase} found from #{
format_database params[:database]}."
end
)
end
def cmd_match(m, params)
phrase = params[:phrase].to_s
results = with_dict(m) {|d| d.match(params[:database],
params[:strategy], phrase)}
m.reply(
if results
results.collect {|database, matches|
@bot.config['dictclient.match_format'].gsub(
'<matches>', matches.collect {|m| format_headword m}.join(', ')
).gsub(
'<database>', format_database(database)
)
}.join ' '
else
"Nothing matched for #{format_headword phrase
} from #{format_database params[:database]} using #{params[:strategy]}"
end
)
end
def cmd_databases(m, params)
with_dict(m) do |d|
m.reply "Databases: #{
d.show_db.collect {|db, d|"#{format_database db}: #{d}"}.join '; '
}"
end
end
def cmd_strategies(m, params)
with_dict(m) do |d|
m.reply "Strategies: #{
d.show_strat.collect {|s, d| "#{s}: #{d}"}.join '; '
}"
end
end
def help(plugin, topic='')
"define <phrase> [from <database>] => Show definition of a phrase; match <phrase> [using <strategy>] [from <database>] => Show matching phrases; dictclient databases => List databases; dictclient strategies => List strategies"
end
end
plugin = DictClientPlugin.new
plugin.map 'define *phrase [from :database]',
:action => 'cmd_define',
:defaults => {:database => DICT::ALL_DATABASES}
plugin.map 'match *phrase [using :strategy] [from :database]',
:action => 'cmd_match',
:defaults => {:database => DICT::ALL_DATABASES,
:strategy => DICT::DEFAULT_MATCH_STRATEGY }
plugin.map 'dictclient databases', :action => 'cmd_databases'
plugin.map 'dictclient strategies', :action => 'cmd_strategies'
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