Class: WeChat::Bot::Pattern

Inherits:
Object
  • Object
show all
Defined in:
lib/wechat/bot/pattern.rb

Overview

消息匹配

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(prefix, pattern, suffix) ⇒ Pattern

Returns a new instance of Pattern.



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# File 'lib/wechat/bot/pattern.rb', line 44

def initialize(prefix, pattern, suffix)
  @prefix, @pattern, @suffix = prefix, pattern, suffix
end

Instance Attribute Details

#pattern ⇒ Object (readonly)

Returns the value of attribute pattern.



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# File 'lib/wechat/bot/pattern.rb', line 42

def pattern
  @pattern
end

#prefix ⇒ Object (readonly)

Returns the value of attribute prefix.



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# File 'lib/wechat/bot/pattern.rb', line 40

def prefix
  @prefix
end

#suffix ⇒ Object (readonly)

Returns the value of attribute suffix.



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# File 'lib/wechat/bot/pattern.rb', line 41

def suffix
  @suffix
end

Class Method Details

.generate(type, argument) ⇒ Object 



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# File 'lib/wechat/bot/pattern.rb', line 31

def self.generate(type, argument)
  case type
  when :ctcp
    Pattern.new(/^/, /#{Regexp.escape(argument.to_s)}(?:$| .+)/, nil)
  else
    raise ArgumentError, "Unsupported type: #{type.inspect}"
  end
end

.obj_to_r(obj, anchor = nil) ⇒ Regexp?

Parameters:

  • obj (String, Regexp, NilClass, Proc, #to_s) —

    匹配规则

Returns:

  • (Regexp, nil) 


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# File 'lib/wechat/bot/pattern.rb', line 6

def self.obj_to_r(obj, anchor = nil)
  case obj
  when Regexp, NilClass
    return obj
  else
    escaped = Regexp.escape(obj.to_s)
    case anchor
    when :start
      return Regexp.new("^" + escaped)
    when :end
      return Regexp.new(escaped + "$")
    when nil
      return Regexp.new(Regexp.escape(obj.to_s))
    end
  end
end

.resolve_proc(obj, msg = nil) ⇒ Object 



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# File 'lib/wechat/bot/pattern.rb', line 23

def self.resolve_proc(obj, msg = nil)
  if obj.is_a?(Proc)
    return resolve_proc(obj.call(msg), msg)
  else
    return obj
  end
end

Instance Method Details

#to_r(msg = nil) ⇒ Object 



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# File 'lib/wechat/bot/pattern.rb', line 48

def to_r(msg = nil)
  pattern = Pattern.resolve_proc(@pattern, msg)

  case pattern
  when Regexp, NilClass
    prefix  = Pattern.obj_to_r(Pattern.resolve_proc(@prefix, msg), :start)
    suffix  = Pattern.obj_to_r(Pattern.resolve_proc(@suffix, msg), :end)
    /#{prefix}#{pattern}#{suffix}/
  else
    prefix  = Pattern.obj_to_r(Pattern.resolve_proc(@prefix, msg))
    suffix  = Pattern.obj_to_r(Pattern.resolve_proc(@suffix, msg))
    /^#{prefix}#{Pattern.obj_to_r(pattern)}#{suffix}$/
  end
end