Class: Valise::PathMatcher

Inherits:
Object
  • Object
show all
Includes:
Enumerable, Unpath
Defined in:
lib/valise/path-matcher.rb

Direct Known Subclasses

DirGlob, FileGlob

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Unpath

#collapse, file_from_backtrace, #file_from_backtrace, #from_here, from_here, repath, string_to_segments, unpath, up_to, #up_to

Constructor Details

#initialize(segment = nil) ⇒ PathMatcher

Returns a new instance of PathMatcher.



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# File 'lib/valise/path-matcher.rb', line 21

def initialize(segment = nil)
  @children = []
  @segment = segment
  @value = nil
end

Instance Attribute Details

#segment ⇒ Object (readonly)

Returns the value of attribute segment.



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# File 'lib/valise/path-matcher.rb', line 27

def segment
  @segment
end

Class Method Details

.build(path, value = true) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 8

def self.build(path, value = true)
  case path
  when PathMatcher
    return path
  when String, Array
    matcher = PathMatcher.new
    matcher[path] = value
    return matcher
  else
    raise ArgumentError, "Path matchers can only be built from arrays or strings"
  end
end

Instance Method Details

#===(path) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 81

def ===(path)
  return !!self[path]
end

#[](path) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 52

def [](path)
  retreive(unpath(path))
end

#[]=(pattern, result) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 77

def []=(pattern, result)
  store(unpath(pattern), result)
end

#access(segments) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 68

def access(segments)
  return retreive(segments.drop(1)) if match?(segments.first)
  return nil
end

#each(prefix = []) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 40

def each(prefix = [])
  each_pair do |segments, value|
    yield(segments) if !!value
  end
end

#each_pair(prefix = []) {|segments, @value| ... } ⇒ Object

Yields:

  • (segments, @value) 


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# File 'lib/valise/path-matcher.rb', line 29

def each_pair(prefix = [])
  segments = prefix.dup
  segments << @segment if @segment
  @children.each do |child|
    child.each_pair(segments) do |segments, value|
      yield(segments, value)
    end
  end
  yield(segments, @value) if @value
end

#match?(segment) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/valise/path-matcher.rb', line 73

def match?(segment)
  @segment == segment
end

#merge!(other) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 46

def merge!(other)
  other.each_pair do |path, value|
    self[path] = value
  end
end

#retreive(segments) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 56

def retreive(segments)
  if segments.empty?
    return @value
  else
    @children.each do |child|
      val = child.access(segments)
      return val unless val.nil?
    end
  end
  return nil
end

#store(segments, result) ⇒ Object 



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# File 'lib/valise/path-matcher.rb', line 85

def store(segments, result)
  if segments.empty?
    @value = result
  else
    index = segments.shift
    target = @children.find {|child| child.segment == index } ||
      case index
      when "**"; DirGlob.new.tap{|m| @children << m}
      when /.*[*].*/; FileGlob.new(index).tap{|m| @children << m}
      else; PathMatcher.new(index).tap{|m| @children.unshift m}
      end
    target.store(segments, result)
  end
end