NAME
    URI::tel - Implementation of rfc3966 for tel URI

SYNOPSIS
        my $tel = URI::tel->new( 'tel:+1-418-656-9254;ext=102' );
        ## or
        my $tel = URI::tel->new( 'tel:5678-1234;phone-context=+81-3' );
        ## or
        my $tel = URI::tel->new( '03-5678-1234' );
        $tel->context( '+81' );
        $tel->ext( 42 );
        print( $tel->canonical->as_string, "\n" );
        my $tel2 = $tel->canonical;
        print( "$tel2\n" );
        ## or
        my $tel = URI::tel->new( '+1-800-LAWYERS' );
        my $actualPhone = $tel->aton;
        ## would produce +1-800-5299377

        ## Comparing 2 telephones
        ## https://tools.ietf.org/search/rfc3966#section-4
        if( $tel == $tel2 )
        {
            ## then do something
        }

DESCRIPTION
    "URI::tel" is a package to implement the tel URI as defined in rfc3966
    <https://tools.ietf.org/search/rfc3966>.

    tel URI is structured as follows:

    tel:*telephone-subscriber*

    *telephone-subscriber* is either a *global-number* or a *local-number*

    *global-number* can be composed of the following characters:

    +[0-9\-\.\(\)]*[0-9][0-9\-\.\(\)]* then followed with one or zero
    parameter, extension, isdn-subaddress

    *local-number* can be composed of the following characters:

    [0-9A-F\*\#\-\.\(\)]* ([0-9A-F\*\#])[0-9A-F\*\#\-\.\(\)]* followed by
    one or zero of parameter, extension, isdn-subaddress, then at least one
    context then followed by one or zero of parameter, extension,
    isdn-subaddress.

    *parameter* is something that looks like
    ;[a-zA-Z0-9\-]+=[\[\]\/\:\&\+\$0-9a-zA-Z\-\_\.\!\~\*\'\(\)]+

    *extension* is something that looks like ;ext=[0-9\-\.\(\)]+

    *isdn-subaddress* is something that looks like
    ;isub=[\;\/\?\:\@\&\=\+\$\,a-zA-Z0-9\-\_\.\!\~\*\'\(\)%0-9A-F]+

    *context* is something that looks like
    ;phone-context=([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9]\.)?([a-
    zA-Z]|[a-zA-Z][a-zA-Z0-9\-]*[a-zA-Z0-9]) or
    ;phone-context=+([0-9]+[\-\.\(\)]*)?[0-9]+([0-9]+[\-\.\(\)]*)?

METHODS
    new( tel URI )
        new() is provided with a tel URI and return an instance of this
        package.

    as_string()
        Returns a string representation of the tel uri. This package is
        overloaded, so one can get the same result by doing

            my $str = $tel->as_string;

    aton( [ telephone ] )
        If no phone number is given as argument, it will use the
        *subscriber* value of the object used to call this method. It
        returns the phone number with the letters replaced by their digit
        counterparts.

        For example a subscriber such as "tel:+1-800-LAWYERS" would return
        "tel:+1-800-5299377"

    canonical
        Return the tel uri in a canonical form, ie without any visualisation
        characters, ie no "hyphen", "comma", "dot", etc

    clone()
        Returns an exact copy of the current object.

    context( [ CONTEXT ] )
        Given a telephone context, sets the value accordingly. It returns
        the current existing value.

        For example, with a phone number of 03-1234-5678, this is a local
        number, and one could set some context, such as

            $tel->context( '+81' )

        Thus, when called upon as a string, the object would return:

            03-1234-5678;phone-context=+81

    country()
        If the current telephone uri is as global number, this method will
        try to find out to which country it belongs. It returns an array in
        list context and an array reference in scalar context.

        If there are more than one country using the same international
        dialling code, it will return multiple entry in the array. This is
        typically true for countries like Canada and the United States who
        both uses the same +1 international dialling code.

        One could then do something like the following:

            my $ref = $tel->country;
            print( "Country: ", @$ref > 1 ? join( ' or ', map( $_->{ 'name' }, @$ref ) ) : @$ref ? $ref->[0]->{ 'name' } : 'not found', "\n" );

        which would produce:

            Country: Canada or United States

        Each array entry is a reference to an associative array, which
        contains the following fields:

        *cc* for the iso 3166 2-letters code
        *cc3* for the iso 3166 3-letters code
        *name* for the country name
        *idd* for the international dialling code. *idd* is an array
        reference which may contains one or more entries, as there may be
        multiple international dialling code per country.

    is_global()
        Returns true or false depending on whether the phone number is a
        global one, ie starting with "+".

    is_local()
        Returns true or false depending on whether the phone number is a
        local one, ie a number without the "+" prefix. This can happen of
        course with numbers such as "03-1234-5678", but also for emergency
        number, such as 110 (police in Japan) or 911 (police in the U.S.).

        One could set a prefix to clarify, such as:

            my $tel = URI::tel->new( '110' );
            $tel->context( '+81' );
            ## which would produce:
            ## 110;phone-context=+81

    is_other()
        Normally, as per rfc 3966, a non global number must have a context,
        but in everyday life this is rarely the case, so is_other flags
        those numbers who are local but lack a context.

        It returns true or false.

    is_vanity()
        Returns true or false whether the telephone number is a vanity
        number, such as "+1-800-LAWYERS".

    isub( [ ISDN SUBADDRESS ] )
        Optionally sets the isdn subaddress if a value is provided. It
        returns the current value set.

            $tel->isub( 1420 );

    original()
        Returns the original telephone number provided, before any possible
        changes were brought.

    private( [ NAME, [ VALUE ] ] )
        Given a *NAME*, private returns the value entry for that parameter.
        If a *VALUE* is provided, it will set this value for the given name.
        if no *NAME*, and no *VALUE* was provided, private returns a list of
        all the name-value pair currently set, or a reference to that
        associative array in scalar context.

    subscriber( [ PHONE ] )
        Returns the current telephone number set for this telephone uri. For
        example:

            my $tel = URI::tel->new( 'tel:+1-418-656-9254;ext=102' );
            my $subscriber = $tel->subscriber;

        will return: "+1-418-656-9254"

    type()
        This is a read-only method. It returns the type of the telephone
        number. The type can be one of the following values: global, local,
        other, vanity

SEE ALSO
    List of country calling codes:
    <https://en.wikipedia.org/wiki/List_of_country_calling_codes>

CREDITS
    Credits to Thiago Berlitz Rondon for the initial version.

COPYRIGHT
    Copyright (c) 2016-2018 Jacques Deguest <jack@deguest.jp>

    This program is free software; you can redistribute it and/or modify it
    under the same terms as Perl itself.