module ActiveRecord::Sanitization::ClassMethods

# File activerecord/lib/active_record/sanitization.rb, line 123
def sanitize_sql_array(ary)
  statement, *values = ary
  if values.first.is_a?(Hash) && /:\w+/.match?(statement)
    replace_named_bind_variables(statement, values.first)
  elsif statement.include?("?")
    replace_bind_variables(statement, values)
  elsif statement.blank?
    statement
  else
    statement % values.collect { |value| connection.quote_string(value.to_s) }
  end
end

# File activerecord/lib/active_record/sanitization.rb, line 46
def sanitize_sql_for_assignment(assignments, default_table_name = table_name)
  case assignments
  when Array; sanitize_sql_array(assignments)
  when Hash;  sanitize_sql_hash_for_assignment(assignments, default_table_name)
  else        assignments
  end
end

# File activerecord/lib/active_record/sanitization.rb, line 22
def sanitize_sql_for_conditions(condition)
  return nil if condition.blank?

  case condition
  when Array; sanitize_sql_array(condition)
  else        condition
  end
end

# File activerecord/lib/active_record/sanitization.rb, line 62
def sanitize_sql_for_order(condition)
  if condition.is_a?(Array) && condition.first.to_s.include?("?")
    enforce_raw_sql_whitelist([condition.first],
      whitelist: AttributeMethods::ClassMethods::COLUMN_NAME_ORDER_WHITELIST
    )

    # Ensure we aren't dealing with a subclass of String that might
    # override methods we use (eg. Arel::Nodes::SqlLiteral).
    if condition.first.kind_of?(String) && !condition.first.instance_of?(String)
      condition = [String.new(condition.first), *condition[1..-1]]
    end

    Arel.sql(sanitize_sql_array(condition))
  else
    condition
  end
end

# File activerecord/lib/active_record/sanitization.rb, line 84
def sanitize_sql_hash_for_assignment(attrs, table)
  c = connection
  attrs.map do |attr, value|
    type = type_for_attribute(attr)
    value = type.serialize(type.cast(value))
    "#{c.quote_table_name_for_assignment(table, attr)} = #{c.quote(value)}"
  end.join(", ")
end

# File activerecord/lib/active_record/sanitization.rb, line 107
def sanitize_sql_like(string, escape_character = "\\")
  pattern = Regexp.union(escape_character, "%", "_")
  string.gsub(pattern) { |x| [escape_character, x].join }
end

# File activerecord/lib/active_record/sanitization.rb, line 152
def expand_hash_conditions_for_aggregates(attrs) # :doc:
  expanded_attrs = {}
  attrs.each do |attr, value|
    if aggregation = reflect_on_aggregation(attr.to_sym)
      mapping = aggregation.mapping
      mapping.each do |field_attr, aggregate_attr|
        expanded_attrs[field_attr] = if value.is_a?(Array)
          value.map { |it| it.send(aggregate_attr) }
        elsif mapping.size == 1 && !value.respond_to?(aggregate_attr)
          value
        else
          value.send(aggregate_attr)
        end
      end
    else
      expanded_attrs[attr] = value
    end
  end
  expanded_attrs
end