[asterisk-bugs] [Asterisk 0011943]: Feature to write variables to existing channels other than your own (func chanvar)

[noreply at bugs.digium.com]

A NOTE has been added to this issue. 
====================================================================== 
http://bugs.digium.com/view.php?id=11943 
====================================================================== 
Reported By:                ramonpeek
Assigned To:                russell
====================================================================== 
Project:                    Asterisk
Issue ID:                   11943
Category:                   Functions/func_logic
Reproducibility:            N/A
Severity:                   feature
Priority:                   normal
Status:                     assigned
Asterisk Version:           SVN 
SVN Branch (only for SVN checkouts, not tarball releases):  trunk 
SVN Revision (number only!):  
Disclaimer on File?:        N/A 
Request Review:              
====================================================================== 
Date Submitted:             02-06-2008 15:08 CST
Last Modified:              02-07-2008 08:42 CST
====================================================================== 
Summary:                    Feature to write variables to existing channels
other than your own (func chanvar)
Description: 
Many, many times I ran into a dialplan issue where I wanted to set a
variable in the called channel whilst the dialplan was running in the
calling channel.
To my frustration an application like ImportVar() existed but something
like ExportVar() did not.

After bumping into the issue a bit too often I deciced to write it myself
:-)
It probably took me less time writing the patch than it took finding out
ways to realize this feature with the current set of applications &
functions :-(

Anyway...
I started out writing the patch for 1.4.17 and called it 'ExportVar'.
But after finding out it was deprecated in the svn-trunk and talking to
Digium (Qwell) about it,
I decided to create a new logical function in func_logic called
'CHANVAR'.
This feature includes read & write making function 'ImportVar' & 'IMPORT'
both obsolete.
Since function 'IMPORT' is only in teh svn-trunk perhaps it should be
removed or deprecated if this patch gets submitted. 

This is how the new feature works;

To read a variable from another channel;
- Set(CHANVAR(channel,variable)=value)

To write a variable to another channel;
- Set(varname=${CHANVAR(channel,variable)})


PS:
For everyone that wants to add this feature (themselves) to Asterisk
1.4.17 a path to backport to 1.4.17 is also uploaded.
====================================================================== 

---------------------------------------------------------------------- 
 atis - 02-07-08 08:42  
---------------------------------------------------------------------- 
Corydon76: the way to distinguish people would be menuselect option that's
disabled by default and shows warning below it.

Imagine a case where you need to pass data from child channel to parent
channel. In parent channel you don't know the name of child channel, so you
have to create some complex dialplan macros to make that working. 

ramonpeek: it would be a good idea to add "bridged" option to func_chanvar
- so that i don't have to keep channel's name, but can just set bridged
channel's variable.

Anyway - if this won't make to official releases, i hope that it will
still be maintained for those who know why they need this. 

Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
02-07-08 08:42  atis           Note Added: 0081845                          
======================================================================