Class: Filter::Base

Inherits:
SimpleDelegator
  • Object
show all
Includes:
ActiveModel::Model
Defined in:
lib/filter/base.rb

Constant Summary collapse

DEFAULTS = 
{}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(attributes: {}, relation: nil) ⇒ Base

Returns a new instance of Base.



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# File 'lib/filter/base.rb', line 12

def initialize(attributes: {}, relation: nil)
  @original_relation = relation || default_relation
  setup_ostruct(attributes)
  perform_filtering
end

Instance Attribute Details

#attributes ⇒ Object (readonly)

Returns the value of attribute attributes.



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# File 'lib/filter/base.rb', line 5

def attributes
  @attributes
end

#original_relation ⇒ Object (readonly)

Returns the value of attribute original_relation.



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# File 'lib/filter/base.rb', line 5

def original_relation
  @original_relation
end

#relation ⇒ Object (readonly)

Returns the value of attribute relation.



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# File 'lib/filter/base.rb', line 5

def relation
  @relation
end

Instance Method Details

#advance(record, advancement) ⇒ Object 



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# File 'lib/filter/base.rb', line 33

def advance(record, advancement)
  advanced_id = ids[(index(record) + advancement) % ids.count]
  relation.find(advanced_id)
end

#fork(attributes: {}, skip: []) ⇒ Object 



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# File 'lib/filter/base.rb', line 18

def fork(attributes: {}, skip: [])
  skip = Array.wrap(skip)
  attributes = to_h.merge(attributes)
  attributes.delete_if { |k, v| skip.include?(k) }
  self.class.new(attributes: attributes, relation: original_relation)
end

#ids ⇒ Object 



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# File 'lib/filter/base.rb', line 42

def ids
  @ids ||= relation.pluck(:id).uniq
end

#index(record) ⇒ Object 



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# File 'lib/filter/base.rb', line 38

def index(record)
  ids.index(record.id)
end

#inspect ⇒ Object 



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# File 'lib/filter/base.rb', line 55

def inspect
  super.gsub('OpenStruct', "Filter (#{original_relation.to_s})")
end

#next(current_record) ⇒ Object 



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# File 'lib/filter/base.rb', line 25

def next(current_record)
  advance(current_record, 1)
end

#previous(current_record) ⇒ Object 



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# File 'lib/filter/base.rb', line 29

def previous(current_record)
  advance(current_record, -1)
end

#to_query ⇒ Object 



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# File 'lib/filter/base.rb', line 51

def to_query
  { filter_base: to_h }.to_query
end

#to_url(path = nil) ⇒ Object 



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# File 'lib/filter/base.rb', line 46

def to_url(path = nil)
  path ||= ''
  "#{path}?"+to_query
end