Class: Decidim::PrivateDownload

Inherits:
Object
  • Object
show all
Defined in:
app/models/decidim/private_download.rb

Defined Under Namespace

Classes: InvalidTokenError

Constant Summary collapse

VERIFIER_PURPOSE = 
:private_download

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(record:, attachment_name:) ⇒ PrivateDownload

Returns a new instance of PrivateDownload.



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# File 'app/models/decidim/private_download.rb', line 28

def initialize(record:, attachment_name:)
  @record = record
  @attachment_name = attachment_name.to_s
end

Class Method Details

.for(record, attachment_name:) ⇒ Object 



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# File 'app/models/decidim/private_download.rb', line 9

def self.for(record, attachment_name:)
  new(record:, attachment_name:)
end

.from_token(token) ⇒ Object 



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# File 'app/models/decidim/private_download.rb', line 13

def self.from_token(token)
  payload = verifier.verify(token, purpose: VERIFIER_PURPOSE).with_indifferent_access
  record = GlobalID::Locator.locate(payload[:gid])

  raise InvalidTokenError if record.blank?

  new(record:, attachment_name: payload[:attachment_name])
rescue ActiveSupport::MessageVerifier::InvalidSignature, TypeError
  raise InvalidTokenError
end

.verifier ⇒ Object 



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# File 'app/models/decidim/private_download.rb', line 24

def self.verifier
  @verifier ||= ActiveSupport::MessageVerifier.new(Rails.application.secret_key_base, serializer: JSON)
end

Instance Method Details

#attached? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/decidim/private_download.rb', line 47

def attached?
  attachment.respond_to?(:attached?) && attachment.attached?
end

#attachment ⇒ Object 



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# File 'app/models/decidim/private_download.rb', line 43

def attachment
  record.public_send(attachment_name)
end

#authorized_for?(user) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/decidim/private_download.rb', line 51

def authorized_for?(user)
  return false unless record.respond_to?(:private_download_authorized?)

  record.private_download_authorized?(user, attachment_name)
end

#token ⇒ Object 



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# File 'app/models/decidim/private_download.rb', line 33

def token
  self.class.verifier.generate(
    {
      gid: record.to_global_id.to_s,
      attachment_name:
    },
    purpose: VERIFIER_PURPOSE
  )
end