Creates and returns a new {PublicSuffix::Domain} instance.

@overload initialize(tld) Initializes with a +tld+. @param [String] tld The TLD (extension) @overload initialize(tld, sld) Initializes with a +tld+ and +sld+. @param [String] tld The TLD (extension) @param [String] sld The TRD (domain) @overload initialize(tld, sld, trd) Initializes with a +tld+, +sld+ and +trd+. @param [String] tld The TLD (extension) @param [String] sld The SLD (domain) @param [String] tld The TRD (subdomain)

@yield [self] Yields on self. @yieldparam [PublicSuffix::Domain] self The newly creates instance

@example Initialize with a TLD PublicSuffix::Domain.new("com")

=> #<PublicSuffix::Domain @tld="com">

@example Initialize with a TLD and SLD PublicSuffix::Domain.new("com", "example")

=> #<PublicSuffix::Domain @tld="com", @trd=nil>

@example Initialize with a TLD, SLD and TRD PublicSuffix::Domain.new("com", "example", "wwww")

=> #<PublicSuffix::Domain @tld="com", @trd=nil, @sld="example">

Splits a string into the labels, that is the dot-separated parts.

The input is not validated, but it is assumed to be a valid domain name.

@example

name_to_labels('example.com')

=> ['example', 'com']

name_to_labels('example.co.uk')

=> ['example', 'co', 'uk']

@param name [String, #to_s] The domain name to split. @return [Array]

Returns a domain-like representation of this object if the object is a {#domain?}, nil otherwise.

PublicSuffix::Domain.new("com").domain

=> nil

PublicSuffix::Domain.new("com", "google").domain

=> "google.com"

PublicSuffix::Domain.new("com", "google", "www").domain

=> "www.google.com"

This method doesn't validate the input. It handles the domain as a valid domain name and simply applies the necessary transformations.

This method returns a FQD, not just the domain part. To get the domain part, use #sld (aka second level domain).

PublicSuffix::Domain.new("com", "google", "www").domain

=> "google.com"

PublicSuffix::Domain.new("com", "google", "www").sld

=> "google"

@see #domain? @see #subdomain

@return [String]

Checks whether self looks like a domain.

This method doesn't actually validate the domain. It only checks whether the instance contains a value for the {#tld} and {#sld} attributes. If you also want to validate the domain, use {#valid_domain?} instead.

@example

PublicSuffix::Domain.new("com").domain?

=> false

PublicSuffix::Domain.new("com", "google").domain?

=> true

PublicSuffix::Domain.new("com", "google", "www").domain?

=> true

This is an invalid domain, but returns true

because this method doesn't validate the content.

PublicSuffix::Domain.new("com", nil).domain?

=> true

@see #subdomain?

@return [Boolean]

Returns the full domain name.

@return [String]

@example Gets the domain name of a domain PublicSuffix::Domain.new("com", "google").name

=> "google.com"

@example Gets the domain name of a subdomain PublicSuffix::Domain.new("com", "google", "www").name

=> "www.google.com"

Returns a subdomain-like representation of this object if the object is a {#subdomain?}, nil otherwise.

PublicSuffix::Domain.new("com").subdomain

=> nil

PublicSuffix::Domain.new("com", "google").subdomain

=> nil

PublicSuffix::Domain.new("com", "google", "www").subdomain

=> "www.google.com"

This method doesn't validate the input. It handles the domain as a valid domain name and simply applies the necessary transformations.

This method returns a FQD, not just the subdomain part. To get the subdomain part, use #trd (aka third level domain).

PublicSuffix::Domain.new("com", "google", "www").subdomain

=> "www.google.com"

PublicSuffix::Domain.new("com", "google", "www").trd

=> "www"

@see #subdomain? @see #domain

@return [String]

Checks whether self looks like a subdomain.

This method doesn't actually validate the subdomain. It only checks whether the instance contains a value for the {#tld}, {#sld} and {#trd} attributes. If you also want to validate the domain, use {#valid_subdomain?} instead.

@example

PublicSuffix::Domain.new("com").subdomain?

=> false

PublicSuffix::Domain.new("com", "google").subdomain?

=> false

PublicSuffix::Domain.new("com", "google", "www").subdomain?

=> true

This is an invalid domain, but returns true

because this method doesn't validate the content.

PublicSuffix::Domain.new("com", "example", nil).subdomain?

=> true

@see #domain?

@return [Boolean]

Returns a string representation of this object.

@return [String]

Returns an array containing the domain parts.

@return [Tuple(String, String, String)]

@example

PublicSuffix::Domain.new("google.com").to_a

=> {nil, "google", "com"}

PublicSuffix::Domain.new("www.google.com").to_a

=> {nil, "google", "com"}