Class: WebammToRails::Sources::Migrations::FilesList

Inherits:
Object
  • Object
show all
Defined in:
lib/webamm_to_rails/sources/migrations/files_list.rb

Instance Method Summary collapse

Constructor Details

#initialize(waml_definition:, database_tables:) ⇒ FilesList

Returns a new instance of FilesList.



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# File 'lib/webamm_to_rails/sources/migrations/files_list.rb', line 9

def initialize(waml_definition:, database_tables:)
  @waml_definition = waml_definition
  @database_tables = database_tables
end

Instance Method Details

#collection ⇒ Object 



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# File 'lib/webamm_to_rails/sources/migrations/files_list.rb', line 14

def collection
  migrations = []
  migration_timestamp = Time.now.utc - 1_000
  migration_count = 0

  uuid_presenter = ::WebammToRails::Sources::Migrations::UuidDefinition::Presenter.new(waml_definition: @waml_definition)

  if uuid_presenter.render?
    migrations << {
      path: uuid_presenter.file_name((migration_timestamp + migration_count).strftime('%Y%m%d%H%M%S')),
      content: uuid_presenter.render
    }

    migration_count += 1
  end

  active_storage_presenter = ::WebammToRails::Sources::Migrations::ActiveStorageDefinition::Presenter.new(waml_definition: @waml_definition)

  if active_storage_presenter.render?
    migrations << {
      path: active_storage_presenter.file_name((migration_timestamp + migration_count).strftime('%Y%m%d%H%M%S')),
      content: active_storage_presenter.render
    }

    migration_count += 1
  end

  models_order = []

  @database_tables.each do |model|
    depending_on = @waml_definition.database.relationships.select { |r| r.source == model.table && r.type == 'belongs_to' }.map(&:destination)
    models_order << { model: model.table, depending_on: depending_on }
  end

  models_hash = models_order.each_with_object({}) do |model, hash|
    hash[model[:model]] = model
  end

  # Topological Sort
  sorted_models = []
  visited = {}
  temp_marks = {}
  
  models_order.each do |model|
    visit(model[:model], models_hash, sorted_models, visited, temp_marks)
  end

  sorted_models.each do |attrs|
    table_name = attrs[:model]
    db_table = @database_tables.find { |t| t.table == table_name }

    migration_code = ::WebammToRails::Sources::Migrations::Definition.new(
      table_definition: db_table, waml_definition: @waml_definition
    ).render
    
    migrations << {
      path: "db/migrate/#{(migration_timestamp + migration_count).strftime('%Y%m%d%H%M%S')}_create_#{db_table.table}.rb",
      content: migration_code
    }

    migration_count += 1
  end

  migrations
end