Class: Commendo::MySqlBacked::WeightedGroup

Inherits:
Object
  • Object
show all
Defined in:
lib/commendo/mysql-backed/weighted_group.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(key_base, *content_sets) ⇒ WeightedGroup

Returns a new instance of WeightedGroup.



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# File 'lib/commendo/mysql-backed/weighted_group.rb', line 8

def initialize(key_base, *content_sets)
  config_hash = Commendo.config.to_hash
  @mysql = Mysql2::Client.new(config_hash)
  @key_base = key_base
  @content_sets = content_sets
end

Instance Attribute Details

#content_sets ⇒ Object

Returns the value of attribute content_sets.



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# File 'lib/commendo/mysql-backed/weighted_group.rb', line 6

def content_sets
  @content_sets
end

#key_base ⇒ Object

Returns the value of attribute key_base.



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# File 'lib/commendo/mysql-backed/weighted_group.rb', line 6

def key_base
  @key_base
end

#mysql ⇒ Object

Returns the value of attribute mysql.



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# File 'lib/commendo/mysql-backed/weighted_group.rb', line 6

def mysql
  @mysql
end

#tag_set ⇒ Object

Returns the value of attribute tag_set.



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# File 'lib/commendo/mysql-backed/weighted_group.rb', line 6

def tag_set
  @tag_set
end

Instance Method Details

#filtered_similar_to(resource, options = {}) ⇒ Object 



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# File 'lib/commendo/mysql-backed/weighted_group.rb', line 22

def filtered_similar_to(resource, options = {})
  if @tag_set.nil? || (options[:include].nil? && options[:exclude].nil?)
    return similar_to(resource, options[:limit] || 0)
  else
    similar = similar_to(resource)
    limit = options[:limit] || similar.length
    filtered = []
    similar.each do |s|
      return filtered if filtered.length >= limit
      filtered << s if @tag_set.matches(s[:resource], options[:include], options[:exclude])
    end
    return filtered
  end
end

#similar_to(resource, limit = 0) ⇒ Object 



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# File 'lib/commendo/mysql-backed/weighted_group.rb', line 15

def similar_to(resource, limit = 0)
  similar = @content_sets.flat_map { |cs| cs[:cs].similar_to(resource).map { |s| {resource: s[:resource], similarity: (s[:similarity] * cs[:weight]).round(3)} } }
  grouped = similar.group_by { |r| r[:resource] }
  totaled_similar = grouped.map { |resource, similar| {resource: resource, similarity: similar.inject(0.0) { |sum, s| sum += s[:similarity] }} }.sort_by { |h| [h[:similarity], h[:resource]] }.reverse
  limit > 0 ? totaled_similar[0..limit-1] : totaled_similar
end