summaryrefslogtreecommitdiff
path: root/data/rbot/plugins/dictclient.rb
blob: f55defa42cdd3ee261769696c7633394409d9062 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
#-- 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 {|hit| format_headword hit}.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