Class: ListTool::Lister

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Lister

Returns a new instance of Lister.



4
5
6
 
# File 'lib/list_tool/lister.rb', line 4

def initialize
  @data = Data.new
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(name, *args, &block) ⇒ Object 



57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
 
# File 'lib/list_tool/lister.rb', line 57

def method_missing(name, *args, &block)
  if name =~ /_list$/
    object = @data
  elsif name =~ /_item$/
    object = if args[-1].is_a?(Hash) && args[-1].has_key?(:list)
              return nil if @data.lists[ args[-1][:list] ].nil?
              index = args.pop()[:list]
              @data.lists[index]
            else
              raise NoDefaultListError, "default list not set" if @data.default_list.nil?
              @data.default_list
            end
  else
    super
  end

  result = object.send(name, *args, &block)
  return nil if result.nil?
  self
rescue NoMethodError => e
  raise NoMethodError, "undefined method '#{name.to_s}' for #{self.inspect}"
end

Class Method Details

.from_hash(hash) ⇒ Object 



12
13
14
15
16
 
# File 'lib/list_tool/lister.rb', line 12

def self.from_hash(hash)
  lister = Lister.new
  lister.instance_variable_set(:@data, Data.new(hash))
  lister
end

.from_json(json) ⇒ Object 



18
19
20
21
 
# File 'lib/list_tool/lister.rb', line 18

def self.from_json(json)
  data = JsonParser.parse(json)
  from_hash(data)
end

Instance Method Details

#inspect ⇒ Object 



8
9
10
 
# File 'lib/list_tool/lister.rb', line 8

def inspect
  "#<#{self.class}:0x#{self.__id__.to_s(16)}>"
end

#list(index = nil) ⇒ Object 



41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/list_tool/lister.rb', line 41

def list(index=nil)
  list = if index
          return nil if @data.lists[index].nil?
          @data.lists[index]
        else
          raise NoDefaultListError, "default list not set" if @data.default_list.nil?
          @data.default_list
        end

  out = {name: list.name, items: []}
  list.items.each do |item|
    out[:items] << item.text
  end
  out
end

#lists ⇒ Object 



33
34
35
36
37
38
39
 
# File 'lib/list_tool/lister.rb', line 33

def lists
  out = {}
  @data.each do |list|
    out[list.name] = list.items.count
  end
  out
end

#load(filename) ⇒ Object 



23
24
25
26
27
 
# File 'lib/list_tool/lister.rb', line 23

def load(filename)
  json = FileManager.load(filename)
  @data = Data.new( JsonParser.parse(json) )
  self
end

#save(filename) ⇒ Object 



29
30
31
 
# File 'lib/list_tool/lister.rb', line 29

def save(filename)
  FileManager.save(filename, @data)
end