Class: BucketMaker::Bucket

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

Overview

Class which holds all the Bucket information

Constant Summary collapse

BUCKET_DESCRIPTION = 
'description'
BUCKET_USER_AFTER = 
'created_after'
BUCKET_DISTRIBUTION = 
'distributions'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(name, options = {}) ⇒ Bucket

Initializer

Parameters:

  • name (string) —

    Name of the Bucket

  • options (Hash) (defaults to: {}) —

    Options for the Bucket like BUCKET_DESCRIPTION, BUCKET_USER_AFTER, BUCKET_DISTRIBUTION



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# File 'lib/bucket_maker/bucket.rb', line 21

def initialize(name, options={})
  @name = name.to_sym
  @summary = options[BUCKET_DESCRIPTION]

  @created_after =  if options[BUCKET_USER_AFTER]
                            DateTime.parse(options[BUCKET_USER_AFTER])
                          else
                            DateTime.parse("1st Jan 1900")
                          end

  @distributions_percent = nil
  @denominator = 1
  @distributions = options[BUCKET_DISTRIBUTION].inject({}) do |result, (dist_name, dist_options)|
                    result[dist_name.to_sym] = dist_options
                    result
                  end if options[BUCKET_DISTRIBUTION]
end

Instance Attribute Details

#created_after ⇒ Object

Returns the value of attribute created_after.



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# File 'lib/bucket_maker/bucket.rb', line 5

def created_after
  @created_after
end

#distributions ⇒ Object

Returns the value of attribute distributions.



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# File 'lib/bucket_maker/bucket.rb', line 5

def distributions
  @distributions
end

#distributions_percent ⇒ Object (readonly)

Returns the value of attribute distributions_percent.



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# File 'lib/bucket_maker/bucket.rb', line 10

def distributions_percent
  @distributions_percent
end

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/bucket_maker/bucket.rb', line 5

def name
  @name
end

#summary ⇒ Object

Returns the value of attribute summary.



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# File 'lib/bucket_maker/bucket.rb', line 5

def summary
  @summary
end

Instance Method Details

#has_group?(group_name) ⇒ Boolean

Check if there is a group in this bucket

Parameters:

  • group_name (String) —

    Name of the group

Returns:

  • (Boolean) —

    does the group exist?



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# File 'lib/bucket_maker/bucket.rb', line 90

def has_group?(group_name)
  @distributions[group_name.to_sym] != nil if group_name
end

#is_bucketable?(bucketable) ⇒ Boolean

Check if the Bucketable conforms to the pre-conditions

Parameters:

  • bucketable (Object) —

    an object which responds to :created_at

Returns:

  • (Boolean) —

    is it bucketable?



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# File 'lib/bucket_maker/bucket.rb', line 81

def is_bucketable?(bucketable)
  bucketable.created_at >= @created_after rescue false
end

#random_group ⇒ String

Randomize and get the group for this bucket

Returns:

  • (String) —

    Group Name after randomization



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# File 'lib/bucket_maker/bucket.rb', line 43

def random_group
  # Is set after first randomization
  unless @distributions_percent
    # Get the total value of the distributions
    #
    @denominator = @distributions.inject(0) do |result, (_, dist_value)|
                    result + dist_value
                  end
    # Populate the variable with Distribution Percentages
    #
    @distributions_percent =  @distributions.inject({}) do |result, (dist_name, dist_value)|
                                result[dist_name.to_sym] = (dist_value * 100.0)/@denominator
                                result
                              end
    # Change the Distribution Percentages with Ranges for easy checks
    #
    @distributions_percent.inject(0) do |starter, (dist_name, percent_value)|
      ender = starter + percent_value
      @distributions_percent[dist_name.to_sym] = (starter .. ender)
      ender
    end
  end

  # Randomize within the 0..max_range
  #
  randomized = rand(@denominator * 100)
  # Find where the randomized number falls in the calculated range
  #
  @distributions_percent.detect do |_, percent_range|
    percent_range.include?(randomized)
  end.first
end