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Mail::Box::Thread::NodUser Contributed Perl DocumentMail::Box::Thread::Node(3)

       Mail::Box::Thread::Node - one node in a message thread

	  is a Mail::Reporter

	my $node = Mail::Box::Thread::Node->new;

       The "Mail::Box::Thread::Node" maintains one node	in the linked list of
       threads.	 Each node contains one	message, and a list of its follow-ups.
       Next to that, it	refers to its own ancestor and contains	information
       about the trustworthiness of that relationship.

       To complicate things a little, because the thread-manager can maintain
       multiple	folders, and merge there content, you may find the same
       message in more folders.	 All versions of the same message (based on
       message-id) are stored in the same node.

       Extends "DESCRIPTION" in	Mail::Reporter.

       Extends "METHODS" in Mail::Reporter.

       Extends "Constructors" in Mail::Reporter.

	   You will not	call this method yourself. The
	   Mail::Box::Thread::Manager object will call it to construct
	   "Mail::Box::Thread::Node" objects.  Either a	"message" or a
	   "messageId" must be supplied.

	    -Option    --Defined in	--Default
	     dummy_type			  undef
	     log	 Mail::Reporter	  'WARNINGS'
	     message			  undef
	     messageId			  undef
	     trace	 Mail::Reporter	  'WARNINGS'

	   dummy_type => CLASS
	     Indicates the class name of dummy messages. Dummy messages	are
	     placeholders in a Mail::Box::Thread::Manager data structure.

	   log => LEVEL
	   message => MESSAGE
	     The MESSAGE which is stored in this node.	The message must be a

	   messageId =>	MESSAGE-ID
	     The MESSAGE-ID for	the message which is stored in this node.
	     Only specify it when you don't have the message yet.

	   trace => LEVEL

   The thread node
	   Add one message to the thread node.	If the node contains a dummy,
	   then	the dummy is replaced. Otherwise, the messages is added	to the
	   end of the list.

       $obj->expand( [BOOLEAN] )
	   Returns whether this	(part of the) folder has to be shown expanded
	   or not.  This is simply done	by a label, which means	that most
	   folder types	can store this.

	   Returns true	if the message is a dummy. A dummy is a	"hole" in a
	   thread which	has follow-ups but does	not have a message.

	   Get the message which is stored in this thread node.	 NOTE: the
	   same	message	may be located in many folders at the same time, and
	   these folders may be	controlled by the same thread manager.

	   In scalar context, this method returns the first instance of	the
	   message that	is not deleted.	If all instances are flagged for
	   deletion, then you get the first deleted message. When the open
	   folders only	contain	references to the message, but no instance,
	   you get a dummy message (see	Mail::Message::Dummy).

	   In list context, all	instances of the message which have been found
	   are returned.


	    my $threads	= $mgr->threads(folders	=> [$draft, $sent]);
	    my $node	= $draft->message(1)->thread;

	    foreach my $instance ($node->message) {
	       print "Found in ", $instance->folder, ".\n";

	    print "Subject is ", $node->message->subject, ".\n";

	   Return the message-id related to this thread	node.  Each of the
	   messages listed in this node	will have the same ID.

   The thread order
	   Returns the list of follow-ups to this thread node.	This list may
	   contain parsed, not-parsed, and dummy messages.

	   Register that the $threads are follow-ups to	this message. These
	   follow-ups need not be related to each other	in any way other than
	   sharing the same parent.

	   Defining the	same relation more than	once will not cause
	   information to be duplicated.

       $obj->follows($thread, $quality)
	   Register that the current thread is a reply to the specified
	   $thread. The	$quality of the	relation is specified by the second
	   argument.  The method returns "undef" if the	link is	not accepted
	   in order to avoid circular references.

	   The relation	may be specified more than once, but only the most
	   confident relation is used. For example, if a reply ($quality
	   equals "REPLY") is specified, later calls to	the follow method will
	   have	no effect. If "follows"	is called with a $quality that matches
	   the current quality,	the new	thread overrides the previous.

	   Returns the message(s) to which the message in this node replies.
	   In scalar context, this method will return the message to which the
	   message in this node	replies. This message object may be a dummy

	   If the message seems	to be the first	message	of a thread, the value
	   "undef" is returned.	 (Remember that	some MUA are not adding
	   reference information to the	message's header, so you can never be
	   sure	a message is the start of a thread)

	   In list context, this method	returns	a second string	value
	   indicating the confidence that the messages are related.  When
	   extended thread discovery is	enabled, then some heuristics are
	   applied to determine	if messages are	related. Values	for the	STRING
	   may be:

	   o   'REPLY'

	       This relation was directly derived from an `in-reply-to'
	       message header field. The relation has a	high confidence.

	   o   'REFERENCE'

	       This relation is	based on information found in a	`Reference'
	       message header field.  One message may reference	a list of
	       messages	which precede it in the	thread.	The heuristic attempts
	       to determine relationships between messages assuming that the
	       references are in order.	 This relation has a lower confidence.

	   o   'GUESS'

	       The relation is a big guess, with low confidence.  It may be
	       based on	a subject which	seems to be related, or	commonalities
	       in the message's	body.

	   More	constants may be added later.


	    my $question = $answer->repliedTo;
	    my ($question, $quality) = $answer->repliedTo;
	    if($question && $quality eq	'REPLY') { ... };

       $obj->sortedFollowUps( [$prepare, [$compare]] )
	   Returns the list of followUps(), but	sorted.	 By default sorting is
	   based on the	estimated time of the reply. See startTimeEstimate().

   On the whole	thread
       Some convenience	methods	are added to threads, to simplify retrieving
       information from	it.

	   Returns a guess as to when the thread has ended (although you never
	   know	for sure whether there fill follow messages in the future).

	   Returns all the ids in the thread starting at the current thread



	   Number of messages in the thread starting at	the current thread
	   node, but not counting the dummies.

	   Execute a function for all sub-threads.  If the subroutine returns
	   true, sub-threads are visited recursively. Otherwise, the current
	   branch traversal is aborted.	The routine is called with the thread-
	   node	as the only argument.

	   Returns a guess as to when the thread was started.  Each message
	   contains various date specifications	(each with various
	   uncertainties resulting from	timezones and out-of-sync clocks). One
	   of these date specifications	is used	as the timestamp for the
	   message. If the node	contains a dummy message the lowest timestamp
	   of the replies is returned. Otherwise the estimated timestamp of
	   the node's message is returned.

	   Returns all the messages in the thread starting at the current
	   thread node.	 This list will	not include dummies.


	    my @t = $folder->message(3)

       $obj->threadToString( [CODE] )
	   Translate a thread into a string. The string	will contain at	least
	   one line for	each message which was found, but tries	to fold
	   dummies.  This is useful for	debugging, but most message readers
	   will	prefer to implement their own thread printer.

	   The optional	CODE argument is a reference to	a routine which	will
	   be called for each message in the thread.  The routine will be
	   called with the message as the first	argument.  The default shows
	   the subject of the message.	In the first example below, this
	   routine is called seven times.


	    print $node->threadToString;

	   may result in

	    Subject of this message
	    |- Re: Subject of this message
	    |-*- Re: Re: Subject of this message
	    | |- Re(2) Subject of this message
	    | |- [3] Re(2) Subject of this message
	    | `- Re: Subject of	this message (reply)
	    `- Re: Subject of this message

	   The `*' represents a	missing	message	(a "dummy" message).  The
	   `[3]' presents a folded thread with three messages.

	    print $node->threadToString(\&show);

	    sub	show($)	{
	       my $message = shift;
	       my $subject = $message->head->get('subject');
	       length $subject ? $subject : '<no subject>';

	   Returns the sum of the size of all the messages in the thread.

   Error handling
       Extends "Error handling"	in Mail::Reporter.

	   Inherited, see "Error handling" in Mail::Reporter

	   Inherited, see "Error handling" in Mail::Reporter

       $obj->defaultTrace( [$level]|[$loglevel,	$tracelevel]|[$level,
       $callback] )
       Mail::Box::Thread::Node->defaultTrace( [$level]|[$loglevel,
       $tracelevel]|[$level, $callback]	)
	   Inherited, see "Error handling" in Mail::Reporter

	   Inherited, see "Error handling" in Mail::Reporter

       $obj->log( [$level, [$strings]] )
       Mail::Box::Thread::Node->log( [$level, [$strings]] )
	   Inherited, see "Error handling" in Mail::Reporter

	   Inherited, see "Error handling" in Mail::Reporter

	   Inherited, see "Error handling" in Mail::Reporter

	   Inherited, see "Error handling" in Mail::Reporter

       $obj->report( [$level] )
	   Inherited, see "Error handling" in Mail::Reporter

       $obj->reportAll(	[$level] )
	   Inherited, see "Error handling" in Mail::Reporter

       $obj->trace( [$level] )
	   Inherited, see "Error handling" in Mail::Reporter

	   Inherited, see "Error handling" in Mail::Reporter

       Extends "Cleanup" in Mail::Reporter.

	   Inherited, see "Cleanup" in Mail::Reporter

       Error: Package $package does not	implement $method.
	   Fatal error:	the specific package (or one of	its superclasses) does
	   not implement this method where it should. This message means that
	   some	other related classes do implement this	method however the
	   class at hand does not.  Probably you should	investigate this and
	   probably inform the author of the package.

       This module is part of Mail-Box distribution version 3.009, built on
       August 18, 2020.	Website:

       Copyrights 2001-2020 by [Mark Overmeer].	For other contributors see

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

perl v5.32.0			  2020-08-18	    Mail::Box::Thread::Node(3)


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