Class: Patrun

Inherits:
Object
  • Object
show all
Defined in:
lib/patrun.rb

Instance Method Summary collapse

Constructor Details

#initialize(custom = nil) ⇒ Patrun 



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# File 'lib/patrun.rb', line 4

def initialize(custom = nil)
  @top = {}
  @custom = custom
end

Instance Method Details

#add(pat, data) ⇒ Object 



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# File 'lib/patrun.rb', line 10

def add(pat, data)

  customizer = nil
  if @custom
    customizer = @custom.call(self, pat, data)
  end

  pat = pat.inject({}){|memo,(k,v)| memo[k.to_sym] = v.to_s; memo}

  keys = pat.keys.sort()

  keymap = @top
  valmap = nil

  i = 0
  while i < keys.length
    key = keys[i]
    val = pat[keys[i]]

    if nil == val
      next
    end

    valmap = keymap[:v]
    if valmap && key == keymap[:k]
      keymap = valmap[val] || (valmap[val] = {})

    elsif !keymap[:k]
      keymap[:k] = key

      keymap[:v] = {}

      keymap = keymap[:v][val] = {}

    else
      if key < keymap[:k]
        curv = keymap[:v]
        curs   = keymap[:s]
        keymap[:v] = {}
        keymap[:s] = {:k => keymap[:k], :v => curv, :s => curs}

        keymap[:k] = key
        keymap = keymap[:v][val] = {}
      else
        valmap = keymap[:v]
        keymap = keymap[:s] || (keymap[:s] = {})
        i-= 1
      end
    end
    i += 1
  end

  if data != nil && keymap
    keymap[:d] = data
    if customizer
      keymap[:f] = isFunction(customizer) ? customizer : (customizer.class == Hash ? customizer[:find] :  false)
      if (customizer.class == Hash)
        keymap[:r] = isFunction(customizer[:remove]) ? customizer[:remove] : nil
      end
    end
  end

  self
end

#find(pat, exact = false) ⇒ Object 



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# File 'lib/patrun.rb', line 81

def find(pat, exact = false)

  if nil == pat
    return nil
  end

  pat = pat.inject({}){|memo,(k,v)| memo[k.to_sym] = v.to_s; memo}

  keymap    = @top
  data      = @top[:d] || nil
  finalfind = @top[:f]
  key       = nil
  stars     = []
  foundkeys = {}
  patlen    = pat.keys.length


  loop do
    key = keymap[:k]

    if keymap[:v]
      nextkeymap = keymap[:v][pat[key]]
      if nextkeymap
        foundkeys[key] = true

        if keymap[:s]
          stars.push(keymap[:s])
        end

        data      = nil == nextkeymap[:d] ? nil : nextkeymap[:d]
        finalfind = nextkeymap[:f]
        keymap    = nextkeymap

      else
        keymap = keymap[:s]
      end

    else
      keymap = nil
    end

    if nil == keymap && nil == data && 0 < stars.length
      keymap = stars.pop()
    end

    break if !keymap
  end

  # special case for default with no properties
  if nil == data && 0 == patlen && nil != @top[:d]
    data      = top[:d]
    finalfind = top[:f]
  end

  if exact && foundkeys.keys.length != patlen
    data = nil
  end

  if finalfind
    data = finalfind.call(self, pat, data)
  end

  data
end

#findexact(pat) ⇒ Object 



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# File 'lib/patrun.rb', line 77

def findexact(pat)
  find(pat, true)
end

#inspect ⇒ Object 



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# File 'lib/patrun.rb', line 233

def inspect
  self.toString()
end

#list(pat = nil, exact = false) ⇒ Object

values can be verbatim, glob, or array of globs



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# File 'lib/patrun.rb', line 191

def list(pat = nil, exact = false)

  acc = []

  if @top[:d]
    item = {:match => {},
              :data => @top[:d]}
    if @top[:f] != nil
      item[:find] = @top[:f]
    end
    acc.push(item)
  end

  if pat != nil
    pat = pat.inject({}){|memo,(k,v)| memo[k.to_sym] = v.to_s; memo}
  end
  descend(pat, exact, @top, {}, merge({}, pat), acc)


  acc
end

#remove(pat) ⇒ Object 



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# File 'lib/patrun.rb', line 146

def remove(pat)

  keymap = @top
  data = nil
  key = nil
  path = []

  pat = pat.inject({}){|memo,(k,v)| memo[k.to_sym] = v.to_s; memo}

  loop do
    key = keymap[:k]

    if keymap[:v]
      nextkeymap = keymap[:v][pat[key]]
      if nextkeymap
        path.push({:km => keymap,:v => pat[key]})
        data   = nextkeymap[:d]
        keymap = nextkeymap

      else
        keymap = keymap[:s]
      end

    else
      keymap = nil
    end

    break if !keymap
  end

  if nil != data
    part = path[path.length-1]
    if part && part[:km] && part[:km][:v]
      point = part[:km][:v][part[:v]]
      if !point[:r] || point[:r].call(self, pat, point[:d])
        point.delete(:d)
      end
    end
  end
end

#toJSON ⇒ Object 



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# File 'lib/patrun.rb', line 238

def toJSON()

  @top.to_json

end

#toString(dstr = nil, tree = false) ⇒ Object 



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# File 'lib/patrun.rb', line 214

def toString(dstr = nil, tree = false)
  defaultFormat = Proc.new { | d |
    isFunction(d) ? "<#{d}>" : "<#{d}>"
  }

  tree = isBoolean(dstr) ? dstr : tree
  tree = nil == tree ? false : tree

  dstr = isFunction(dstr) ? dstr : defaultFormat

  str = []
  o = []

  walk(@top,o,0,[], str, dstr)

  return tree ? o.join('') : str.join("\n")
end