Class: Dorsale::SmallData::Filter

Inherits:
Object
  • Object
show all
Defined in:
app/filters/dorsale/small_data/filter.rb

Constant Summary collapse

STRATEGIES = 
{}

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(jar) ⇒ Filter

Returns a new instance of Filter.



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# File 'app/filters/dorsale/small_data/filter.rb', line 6

def initialize(jar)
  @jar = jar
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object 



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# File 'app/filters/dorsale/small_data/filter.rb', line 26

def method_missing(method, *args)
  if method.to_s.end_with?("=")
    key    = method.to_s[0..-2]
    value  = args.first
    action = :write
  else
    key    = method.to_s
    action = :read
  end

  if strategies.key?(key) && action == :read
    get(key)
  elsif strategies.key?(key) && action == :write
    set(key, value)
  else
    super
  end
end

Instance Attribute Details

#jar ⇒ Object (readonly)

Returns the value of attribute jar.



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# File 'app/filters/dorsale/small_data/filter.rb', line 4

def jar
  @jar
end

Instance Method Details

#apply(query) ⇒ Object 



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# File 'app/filters/dorsale/small_data/filter.rb', line 14

def apply(query)
  strategies.each do |key, strategy|
    value = get(key)

    next if value.blank?

    query = strategy.apply(query, value)
  end

  return query
end

#merge(new_filters) ⇒ Object 



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# File 'app/filters/dorsale/small_data/filter.rb', line 55

def merge(new_filters)
  write read.merge(new_filters)
end

#read ⇒ Object 



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# File 'app/filters/dorsale/small_data/filter.rb', line 45

def read
  JSON.parse jar["filters"].to_s
rescue JSON::ParserError
  {}
end

#strategies ⇒ Object 



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# File 'app/filters/dorsale/small_data/filter.rb', line 10

def strategies
  self.class::STRATEGIES
end

#write(filters) ⇒ Object 



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# File 'app/filters/dorsale/small_data/filter.rb', line 51

def write(filters)
  jar["filters"] = filters.to_json
end