Class: Discordrb::Commands::CommandChain

Inherits:
Object
  • Object
show all
Defined in:
lib/discordrb/commands/parser.rb

Overview

Command chain, may have multiple commands, nested and commands

Instance Method Summary collapse

Constructor Details

#initialize(chain, bot, subchain = false) ⇒ CommandChain

Returns a new instance of CommandChain.



57
58
59
60
61
62
 
# File 'lib/discordrb/commands/parser.rb', line 57

def initialize(chain, bot, subchain = false)
  @attributes = bot.attributes
  @chain = chain
  @bot = bot
  @subchain = subchain
end

Instance Method Details

#execute(event) ⇒ Object 



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
 
# File 'lib/discordrb/commands/parser.rb', line 163

def execute(event)
  old_chain = @chain
  @bot.debug 'Executing bare chain'
  result = execute_bare(event)

  @chain_args ||= []

  @bot.debug "Found chain args #{@chain_args}, preliminary result #{result}"

  @chain_args.each do |arg|
    case arg.first
    when 'repeat'
      new_result = ''
      executed_chain = divide_chain(old_chain).last

      arg[1].to_i.times do
        new_result << CommandChain.new(executed_chain, @bot).execute(event)
      end

      result = new_result
      # TODO: more chain arguments
    end
  end

  result
end

#execute_bare(event) ⇒ Object 



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
 
# File 'lib/discordrb/commands/parser.rb', line 64

def execute_bare(event)
  b_start = -1
  b_level = 0
  result = ''
  quoted = false
  hacky_delim, hacky_space, hacky_prev = [0xe001, 0xe002, 0xe003].pack('U*').chars

  @chain.each_char.each_with_index do |char, index|
    # Quote begin
    if char == @attributes[:quote_start] && !quoted
      quoted = true
      next
    end

    # Quote end
    if char == @attributes[:quote_end] && quoted
      quoted = false
      next
    end

    if char == @attributes[:chain_delimiter] && quoted
      result += hacky_delim
      next
    end

    if char == @attributes[:previous] && quoted
      result += hacky_prev
      next
    end

    if char == ' ' && quoted
      result += hacky_space
      next
    end

    if char == @attributes[:sub_chain_start] && !quoted
      b_start = index if b_level == 0
      b_level += 1
    end

    result << char if b_level <= 0

    next unless char == @attributes[:sub_chain_end] && !quoted
    b_level -= 1
    next unless b_level == 0
    nested = @chain[b_start + 1..index - 1]
    subchain = CommandChain.new(nested, @bot, true)
    result << subchain.execute(event)
  end

  event.respond("Your subchains are mismatched! Make sure you don't have any extra #{@attributes[:sub_chain_start]}'s or #{@attributes[:sub_chain_end]}'s") unless b_level == 0

  @chain = result

  @chain_args, @chain = divide_chain(@chain)

  prev = ''

  chain_to_split = @chain

  # Don't break if a command is called the same thing as the chain delimiter
  chain_to_split.slice!(1..-1) if chain_to_split.start_with?(@attributes[:chain_delimiter])

  first = true
  split_chain = chain_to_split.split(@attributes[:chain_delimiter])
  split_chain.each do |command|
    command = @attributes[:chain_delimiter] + command if first && @chain.start_with?(@attributes[:chain_delimiter])
    first = false

    command.strip!

    # Replace the hacky delimiter that was used inside quotes with actual delimiters
    command.gsub! hacky_delim, @attributes[:chain_delimiter]

    first_space = command.index ' '
    command_name = first_space ? command[0..first_space - 1] : command
    arguments = first_space ? command[first_space + 1..-1] : ''

    # Append a previous sign if none is present
    arguments << @attributes[:previous] unless arguments.include? @attributes[:previous]
    arguments.gsub! @attributes[:previous], prev

    # Replace hacky previous signs with actual ones
    arguments.gsub! hacky_prev, @attributes[:previous]

    arguments = arguments.split ' '

    # Replace the hacky spaces with actual spaces
    arguments.map! do |elem|
      elem.gsub hacky_space, ' '
    end

    # Finally execute the command
    prev = @bot.execute_command(command_name.to_sym, event, arguments, split_chain.length > 1 || @subchain)
  end

  prev
end