Module: SuperAuth::Nestable::ClassMethods

Defined in:
lib/super_auth/nestable.rb

Instance Method Summary collapse

Instance Method Details

#base_name_path(base = self) ⇒ Object 



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# File 'lib/super_auth/nestable.rb', line 135

def base_name_path(base = self)
  "#{singularize(base)}_name_path".to_sym
end

#base_path(base = self) ⇒ Object 



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# File 'lib/super_auth/nestable.rb', line 131

def base_path(base = self)
  "#{singularize(base)}_path".to_sym
end

#cte(id = nil, direction = :desc) ⇒ Object 



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# File 'lib/super_auth/nestable.rb', line 38

def cte(id = nil, direction = :desc)
  model = self
  cte_name = model.cte_name
  base_ds = model.select_all(pluralize)

  case direction
  when :asc
    base_ds = base_ds.where(id: id)

    recursive_ds = model
      .join(cte_name, parent_id: :id)
      .select_all(pluralize)
    base_ds, recursive_ds = with_ascending_paths(base_ds, recursive_ds, cte_name)
  when :desc
    if id
      base_ds = base_ds.where(id: id)
    else
      base_ds = base_ds.where(parent_id: id)
    end

    recursive_ds = model
      .join(cte_name, id: :parent_id)
      .select_all(pluralize(model))

    base_ds, recursive_ds = with_descending_paths(base_ds, recursive_ds, cte_name)
  end

  model.from(cte_name)
    .with_recursive(cte_name, base_ds, recursive_ds)
end

#cte_name(base = self) ⇒ Object 



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# File 'lib/super_auth/nestable.rb', line 127

def cte_name(base = self)
  "super_auth_#{pluralize(base)}_cte".to_sym
end

#demodularize(base = self) ⇒ Object

See: ActiveSupport::Inflector.demodulize



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# File 'lib/super_auth/nestable.rb', line 111

def demodularize(base = self)
  if i = base.name.rindex("::")
    base.name[(i + 2), base.name.length]
  else
    base.name
  end
end

#pluralize(base = self) ⇒ Object 



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# File 'lib/super_auth/nestable.rb', line 119

def pluralize(base = self)
  "super_auth_#{demodularize(base).downcase}s".to_sym
end

#singularize(base = self) ⇒ Object 



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# File 'lib/super_auth/nestable.rb', line 123

def singularize(base = self)
  demodularize(base).downcase.to_sym
end

#string_cast_type ⇒ Object

Helper method to get the appropriate string cast type for the database



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# File 'lib/super_auth/nestable.rb', line 29

def string_cast_type
  case SuperAuth.db.database_type
  when :mysql, :mysql2
    :char
  else
    :text
  end
end

#with_ascending_paths(base_ds, recursive_ds, cte_name) ⇒ Object 



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# File 'lib/super_auth/nestable.rb', line 91

def with_ascending_paths(base_ds, recursive_ds, cte_name)
  [
    base_ds.select_append(Sequel[table_name][:id].cast(string_cast_type).as(base_path)).select_append(Sequel[table_name][:name].as(base_name_path)),
    recursive_ds.select_append(
      Sequel.function(:concat,
        Sequel[table_name][:id].cast(string_cast_type),
        Sequel.lit("','"),
        Sequel[cte_name][base_path].cast(string_cast_type),
      ).as(base_path)
    ).select_append(
       Sequel.function(:concat,
        Sequel[table_name][:name],
        Sequel.lit("','"),
        Sequel[cte_name][base_name_path],
      ).as(base_name_path)
    )
  ]
end

#with_descending_paths(base_ds, recursive_ds, cte_name) ⇒ Object 



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# File 'lib/super_auth/nestable.rb', line 69

def with_descending_paths(base_ds, recursive_ds, cte_name)
  [
    base_ds.select_append(
      Sequel[table_name][:id].cast(string_cast_type).as(base_path)
    ).select_append(Sequel[table_name][:name].as(base_name_path)),

    recursive_ds.select_append(
      Sequel.function(:concat,
        Sequel[cte_name][base_path].cast(string_cast_type),
        Sequel.lit("','"),
        Sequel[pluralize][:id].cast(string_cast_type),
      ).as(base_path)
    ).select_append(
       Sequel.function(:concat,
        Sequel[cte_name][base_name_path],
        Sequel.lit("','"),
        Sequel[table_name][:name],
      ).as(base_name_path)
    )
  ]
end