Class: ForestLiana::OperatorValueParser

Inherits:
Object
  • Object
show all
Defined in:
app/services/forest_liana/operator_value_parser.rb

Class Method Summary collapse

Class Method Details

.format_value(resource, field, value) ⇒ Object 



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# File 'app/services/forest_liana/operator_value_parser.rb', line 90

def self.format_value(resource, field, value)
  columns = resource.columns
  field_name = field
  column_found = columns.find { |column| column.name == field_name }

  if column_found.nil?
    raise ForestLiana::Errors::HTTP422Error.new("Field '#{field_name}' not found")
  end

  if column_found.type == :boolean
    ForestLiana::AdapterHelper.cast_boolean(value)
  else
    "'#{value}'"
  end
end

.get_association_name_for_condition(resource, field) ⇒ Object 



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# File 'app/services/forest_liana/operator_value_parser.rb', line 124

def self.get_association_name_for_condition(resource, field)
  field, subfield = field.split(':')

  association = resource.reflect_on_association(field.to_sym)
  return nil if association.blank?

  tables_associated_to_relations_name =
    ForestLiana::QueryHelper.get_tables_associated_to_relations_name(resource)
  association_name = association.name.to_s
  association_name_pluralized = association_name.pluralize

  if [association_name, association_name_pluralized].include? association.table_name
    # NOTICE: Default case. When the belongsTo association name and the referenced table name
    #         are identical.
    association_name_for_condition = association.table_name
  else
    # NOTICE: When the the belongsTo association name and the referenced table name are not
    #         identical. Format with the ActiveRecord query generator style.
    relations_on_this_table = tables_associated_to_relations_name[association.table_name]
    has_several_associations_to_the_table_and_is_not_first_one =
      !relations_on_this_table.nil? && relations_on_this_table.size > 1 &&
      relations_on_this_table.find_index(association.name) > 0

    if has_several_associations_to_the_table_and_is_not_first_one
      association_name_for_condition = "#{association_name_pluralized}_#{resource.table_name}"
    else
      association_name_for_condition = association.table_name
    end
  end
end

.get_condition(field, operator, value, resource, timezone) ⇒ Object 



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# File 'app/services/forest_liana/operator_value_parser.rb', line 38

def self.get_condition(field, operator, value, resource, timezone)
  field_name = self.get_field_name(field, resource)

  if self.is_belongs_to(field)
    fieldSplit = field.split(':')
    association = fieldSplit.first.to_sym
    field = fieldSplit.last
    resource_association = resource.reflect_on_association(association)

    if resource_association.nil?
      raise ForestLiana::Errors::HTTP422Error.new("Association '#{association.to_s}' not found")
    end

    resource = resource.reflect_on_association(association).klass
  end

  "#{field_name} #{self.get_condition_end(field, operator, value, resource, timezone)}"
end

.get_condition_end(field, operator, value, resource, timezone) ⇒ Object 



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# File 'app/services/forest_liana/operator_value_parser.rb', line 57

def self.get_condition_end(field, operator, value, resource, timezone)
  operator_date_interval_parser = OperatorDateIntervalParser.new(value, timezone)

  if operator_date_interval_parser.is_interval_date_value()
    filter = operator_date_interval_parser.get_interval_date_filter()
    filter
  else
    # NOTICE: Set the integer value instead of a string if "enum" type
    # NOTICE: Rails 3 do not have a defined_enums method
    if resource.respond_to?(:defined_enums) &&
      resource.defined_enums.has_key?(field)
      value = resource.defined_enums[field][value]
    end

    if value
      "#{operator} #{self.format_value(resource, field, value)}"
    else
      operator
    end
  end
end

.get_field_name(field, resource) ⇒ Object 



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# File 'app/services/forest_liana/operator_value_parser.rb', line 79

def self.get_field_name(field, resource)
  if self.is_belongs_to(field)
    association = self.get_association_name_for_condition(resource, field)
    "#{ActiveRecord::Base.connection.quote_column_name(association)}." +
    "#{ActiveRecord::Base.connection.quote_column_name(field.split(':')[1])}"
  else
    "#{resource.quoted_table_name}." +
    "#{ActiveRecord::Base.connection.quote_column_name(field)}"
  end
end

.get_has_one_condition(resource, field, value, timezone) ⇒ Object 



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# File 'app/services/forest_liana/operator_value_parser.rb', line 110

def self.get_has_one_condition(resource, field, value, timezone)
  field, subfield = field.split(':')

  association = resource.reflect_on_association(field.to_sym)
  return nil if association.blank?

  operator, value = OperatorValueParser.parse(value)
  filter = OperatorValueParser
    .get_condition_end(subfield, operator, value, association.klass, timezone)

  association_name_for_condition = self.get_association_name_for_condition(resource, field)
  association_name_for_condition ? "#{association_name_for_condition}.#{subfield} #{filter}" : nil
end

.is_belongs_to(field) ⇒ Object 



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# File 'app/services/forest_liana/operator_value_parser.rb', line 106

def self.is_belongs_to(field)
  field.split(':').size >= 2
end

.parse(value) ⇒ Object 



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# File 'app/services/forest_liana/operator_value_parser.rb', line 4

def self.parse(value)
  operator = nil
  value_comparison = nil

  if value.first == '!' && value[1] != '*'
    operator = '!='
    value_comparison = value[1..-1]
  elsif value.first == '>'
    operator = '>'
    value_comparison = value[1..-1]
  elsif value.first == '<'
    operator = '<'
    value_comparison = value[1..-1]
  elsif value[0] == '!' && value[1] == '*' && value[-1] == '*'
    operator = 'NOT LIKE'
    value = value.delete('!')
    value_comparison = value.gsub('*', '%')
  elsif value[0] == '*' || value[-1] == '*'
    operator = 'LIKE'
    value_comparison = value.gsub('*', '%')
  elsif value === '$present'
    operator = 'IS NOT NULL'
    value_comparison = nil
  elsif value === '$blank'
    operator = 'IS NULL'
    value_comparison = nil
  else
    operator = '='
    value_comparison = value
  end

  [operator, value_comparison]
end