Class: Yerba::Sequence

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/yerba/sequence.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(document_or_array = nil, selector = nil, location = nil, key = nil) ⇒ Sequence

Returns a new instance of Sequence.



9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
 
# File 'lib/yerba/sequence.rb', line 9

def initialize(document_or_array = nil, selector = nil, location = nil, key = nil)
  if document_or_array.is_a?(Document)
    @document = document_or_array
    @selector = selector
    @location = location
    @key = key
    @data = nil
  elsif document_or_array.is_a?(Array)
    @document = nil
    @selector = nil
    @location = nil
    @data = document_or_array
  else
    @document = nil
    @selector = nil
    @location = nil
    @data = []
  end
end

Instance Attribute Details

#key ⇒ Object (readonly)

Returns the value of attribute key.



7
8
9
 
# File 'lib/yerba/sequence.rb', line 7

def key
  @key
end

#location ⇒ Object (readonly)

Returns the value of attribute location.



7
8
9
 
# File 'lib/yerba/sequence.rb', line 7

def location
  @location
end

#selector ⇒ Object (readonly)

Returns the value of attribute selector.



7
8
9
 
# File 'lib/yerba/sequence.rb', line 7

def selector
  @selector
end

Instance Method Details

#<<(item) ⇒ Object 



38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
 
# File 'lib/yerba/sequence.rb', line 38

def <<(item)
  if @document
    case item
    when Map
      @document.insert_object(@selector, item.to_hash)
    when Hash
      @document.insert_object(@selector, item)
    when Scalar
      @document.insert(@selector, item.to_yaml)
    else
      formatted = format_for_insert(item.to_s)
      @document.insert(@selector, formatted)
    end
  else
    @data << item
  end

  self
end

#[](index) ⇒ Object 



29
30
31
32
33
34
35
36
 
# File 'lib/yerba/sequence.rb', line 29

def [](index)
  if @document
    new_path = "#{@selector}[#{index}]"
    @document[new_path]
  else
    @data[index]
  end
end

#concat(items) ⇒ Object 



58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
 
# File 'lib/yerba/sequence.rb', line 58

def concat(items)
  if @document
    hashes = items.map do |item|
      case item
      when Map then item.to_hash
      when Hash then item
      else { value: item.to_s }
      end
    end

    @document.insert_objects(@selector, hashes)
  else
    @data.concat(items)
  end

  self
end

#delete ⇒ Object 



234
235
236
 
# File 'lib/yerba/sequence.rb', line 234

def delete
  @document&.delete(@selector)
end

#delete_at(index) ⇒ Object 



206
207
208
209
210
 
# File 'lib/yerba/sequence.rb', line 206

def delete_at(index)
  @document&.remove_at(@selector, index)

  self
end

#delete_if ⇒ Object 



212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
 
# File 'lib/yerba/sequence.rb', line 212

def delete_if
  return enum_for(:delete_if) unless block_given?

  indices_to_remove = []

  length.times do |index|
    indices_to_remove << index if yield self[index]
  end

  indices_to_remove.reverse_each do |index|
    @document&.remove_at(@selector, index)
  end

  self
end

#each ⇒ Object 



76
77
78
79
80
 
# File 'lib/yerba/sequence.rb', line 76

def each
  return enum_for(:each) unless block_given?

  length.times { |index| yield self[index] }
end

#find_by(selector = nil, value = nil, **criteria) ⇒ Object 



82
83
84
85
86
 
# File 'lib/yerba/sequence.rb', line 82

def find_by(selector = nil, value = nil, **criteria)
  index = index_of(selector, value, **criteria)

  self[index] if index
end

#first ⇒ Object 



192
193
194
 
# File 'lib/yerba/sequence.rb', line 192

def first
  self[0]
end

#index_of(selector = nil, value = nil, **criteria) ⇒ Object 



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
 
# File 'lib/yerba/sequence.rb', line 107

def index_of(selector = nil, value = nil, **criteria)
  if selector && value.nil? && criteria.empty?
    values = @document&.get("#{@selector}[]")

    return values.index(selector) if values.is_a?(Array)

    return nil
  end

  criteria[selector] = value if selector && value
  pairs = expand_nested_criteria(criteria)

  indices = nil

  pairs.each do |field, expected|
    field_string = field.to_s

    if field_string.include?("[]")
      matching = nested_indices_for(field_string, expected)
    else
      values = @document&.get("#{@selector}[].#{field_string}")

      next unless values.is_a?(Array)

      matching = values.each_with_index.filter_map { |actual, index| index if actual == expected }
    end

    indices = indices ? indices & matching : matching
  end

  indices&.first
end

#indices_of(selector = nil, value = nil, **criteria) ⇒ Object 



140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
 
# File 'lib/yerba/sequence.rb', line 140

def indices_of(selector = nil, value = nil, **criteria)
  if selector && value.nil? && criteria.empty?
    values = @document&.get("#{@selector}[]")

    if values.is_a?(Array)
      return values.each_with_index.filter_map { |actual, index| index if actual == selector }
    end

    return []
  end

  criteria[selector] = value if selector && value
  pairs = expand_nested_criteria(criteria)

  indices = nil

  pairs.each do |field, expected|
    field_string = field.to_s

    if field_string.include?("[]")
      matching = nested_indices_for(field_string, expected)
    else
      values = @document&.get("#{@selector}[].#{field_string}")

      next unless values.is_a?(Array)

      matching = values.each_with_index.filter_map { |actual, index| index if actual == expected }
    end

    indices = indices ? indices & matching : matching
  end

  indices || []
end

#inspect ⇒ Object 



257
258
259
260
261
262
263
264
265
266
267
 
# File 'lib/yerba/sequence.rb', line 257

def inspect
  list = items
  preview = list.first(5).map(&:inspect).join(", ")
  suffix = list.length > 5 ? ", ... (#{list.length} items)" : ""

  if @selector
    "#<Yerba::Sequence selector=#{@selector.inspect} [#{preview}#{suffix}]>"
  else
    "#<Yerba::Sequence [#{preview}#{suffix}]>"
  end
end

#last ⇒ Object 



196
197
198
 
# File 'lib/yerba/sequence.rb', line 196

def last
  self[length - 1] # rubocop:disable Style/NegativeArrayIndex
end

#length ⇒ Object Also known as: size 



175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
 
# File 'lib/yerba/sequence.rb', line 175

def length
  if @document
    scalar_items = @document.get("#{@selector}[]")

    if scalar_items.is_a?(Array) && !scalar_items.empty?
      scalar_items.length
    else
      data = @document.get_value(@selector)

      data.is_a?(Array) ? data.length : 0
    end
  else
    @data.length
  end
end

#pluck(*fields) ⇒ Object 



92
93
94
95
96
97
98
99
100
101
102
103
104
105
 
# File 'lib/yerba/sequence.rb', line 92

def pluck(*fields)
  return [] unless @document

  all_values = @document.get_value(@selector)
  return [] unless all_values.is_a?(Array)

  if fields.length == 1

    all_values.map { |item| item.is_a?(Hash) ? item[fields.first.to_s] : item }
  else

    all_values.map { |item| fields.map(&:to_s).map { |field| item.is_a?(Hash) ? item[field] : nil } }
  end
end

#remove(value) ⇒ Object 



200
201
202
203
204
 
# File 'lib/yerba/sequence.rb', line 200

def remove(value)
  @document&.remove(@selector, value.to_s)

  self
end

#sort(by: nil, case_sensitive: false) ⇒ Object 



228
229
230
231
232
 
# File 'lib/yerba/sequence.rb', line 228

def sort(by: nil, case_sensitive: false)
  @document&.sort(@selector, by: by, case_sensitive: case_sensitive)

  self
end

#to_a ⇒ Object Also known as: to_ary 



242
243
244
 
# File 'lib/yerba/sequence.rb', line 242

def to_a
  @data || items
end

#to_yaml ⇒ Object 



247
248
249
250
251
252
253
254
255
 
# File 'lib/yerba/sequence.rb', line 247

def to_yaml
  items.map do |item|
    case item
    when Scalar then "- #{item.to_yaml}"
    when Map then "- #{item.to_yaml.gsub("\n", "\n  ")}"
    else "- #{item}"
    end
  end.join("\n")
end

#value ⇒ Object 



238
239
240
 
# File 'lib/yerba/sequence.rb', line 238

def value
  items
end

#where(selector = nil, value = nil, **criteria) ⇒ Object 



88
89
90
 
# File 'lib/yerba/sequence.rb', line 88

def where(selector = nil, value = nil, **criteria)
  QueryResult.new(self, indices_of(selector, value, **criteria))
end