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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>
begin
require 'dict'
class ::DICTError
def initialize(msg, code = 1)
super(msg)
end
end
rescue LoadError
raise LoadError, "Ruby/DICT not found, grab it from http://www.caliban.org/ruby/ruby-dict.shtml"
end
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
# two or more consecutive newlines are replaced with double spaces, while single
# newlines are replaced with single spaces
lb = /\r?\n/
definition[1..-1].join.
gsub(/\s*(:#{lb}){2,}\s*/, ' ').
gsub(/\s*#{lb}\s*/, ' ').strip
end
end
class DictClientPlugin < Plugin
Config.register Config::StringValue.new('dictclient.server',
:default => 'dict.org',
:desc => _('Hostname or hostname:port of the DICT server used to lookup words'))
Config.register Config::IntegerValue.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'))
Config.register Config::IntegerValue.new('dictclient.max_length_per_def',
:default => 200,
:desc => _('Each definition is truncated to this length'))
Config.register Config::StringValue.new('dictclient.headword_format',
:default => "#{Bold}<headword>#{Bold}",
:desc => _('Format of headwords; <word> will be replaced with the actual word'))
Config.register Config::StringValue.new('dictclient.database_format',
:default => "#{Underline}<database>#{Underline}",
:desc => _('Format of database names; <database> will be replaced with the database name'))
Config.register Config::StringValue.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'))
Config.register Config::StringValue.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']
_("Many definitions for %{phrase} were found in %{databases}. Use 'define <phrase> from <database> to view a definition.") %
{ :phrase => format_headword(phrase),
:databases => results.collect {|r| r.database}.uniq.
collect {|d| format_database d}.join(', ') }
# 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 %{phrase} found from %{database}.") %
{ :phrase => format_headword(phrase),
:database => 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 %{query} from %{database} using %{strategy}") %
{ :query => format_headword(phrase),
:database => format_database(params[:database]),
:strategy => params[:strategy] }
end
)
end
def cmd_databases(m, params)
with_dict(m) do |d|
m.reply _("Databases: %{list}") % {
:list => d.show_db.collect {|db, des| "#{format_database db}: #{des}"}.join(' | ')
}
end
end
def cmd_strategies(m, params)
with_dict(m) do |d|
m.reply _("Strategies: %{list}") % {
:list => d.show_strat.collect {|s, des| "#{s}: #{des}"}.join(' | ')
}
end
end
def help(plugin, topic='')
case topic
when 'define'
_('define <phrase> [from <database>] => Show definition of a phrase')
when 'match'
_('match <phrase> [using <strategy>] [from <database>] => Show phrases matching the given pattern')
when 'server information'
_('dictclient databases => List databases; dictclient strategies => List strategies')
else
_('look up phrases on the configured DICT server. topics: define, match, server information')
end
end
end
plugin = DictClientPlugin.new
plugin.map 'define *phrase [from :database]',
:action => 'cmd_define',
:defaults => {:database => DICT::ALL_DATABASES},
:threaded => true
plugin.map 'match *phrase [using :strategy] [from :database]',
:action => 'cmd_match',
:defaults => {:database => DICT::ALL_DATABASES,
:strategy => DICT::DEFAULT_MATCH_STRATEGY },
:threaded => true
plugin.map 'dictclient databases', :action => 'cmd_databases', :thread => true
plugin.map 'dictclient strategies', :action => 'cmd_strategies', :thread => true
|
