Watchlist Plugin

The WatchlistPlugin handles the %WATCHLIST{...}% variable. All watchlist interaction is done using this variable.

Parameter	Description	Default
"..." or action="..."	Action to take	"showwatchlink"
Action: "showwatchlink"		Default
"showwatchlink"	Action: Show "Watch" / "Unwatch" link
format="..."	Format of link. Supported variables: • $url - URL to toggle the watch state. • $watch - "Watch" if page is not watched, else "Unwatch".	"[[$url][$watch]]"
Action: "showwatchlistlink"		Default
"showwatchlistlink"	Action: Show link of a user's watchlist topic
format="..."	Format of link. Supported variables: • $url - URL of the watchlist topic. In case the topic does not exist, a special URL is returned so that the topic with the proper format can be created. • $wikiname - WikiName of user.	"[[$url][Watchlist Changes]]"
wikiname="..."	WikiName of user	logged-in user
Action: "togglewatch"		Default
"togglewatch"	Action: Toggle the watch state of a topic. The URL parameter watchlist_topic must specify the Web.TopicName.
Action: "showchanges"		Default
"showchanges"	Action: Show watchlist changes of topics a user is watching
header="..."	Header of watchlist changes. Supported variable: • $n or $n() - newline.	{ChangesHeader}
format="..."	Format of one entry of watchlist changes. Supported variables: • $web - name of web. • $topic - topic name. • $title - topic title, or spaced topic name if title does not exist. • $date - change date of topic. • $rev - revision of topic. • $wikiname - WikiName of last author. • $percnt - percent sign. • $n or $n() - newline.	{ChangesFormat}
footer="..."	Footer of watchlist changes. Supported variable: • $n or $n() - newline.	{ChangesFooter}
separator="..."	Separator between entries. Supported variable: • $n or $n() - newline.	"$n"
limit="..."	Limit number of topics.	URL parameter limit or "50"
empty="..."	Message shown if no topics are watched. Supported variable: • $percnt - percent sign.	{EmptyMessage}
Action: "watched"		Default
"watched"	Action: Show table of with all watched topics, with checkboxes to unwatch topics. The form action points to the "updatelist" action.
topics="..."	List of watched topics in Web.TopicName format. The plugin stores the watchlist using this variable action in the user's watchlist topic.	""
Action: "updatelist"		Default
"updatelist"	Action: Update the watched topics list. The URL parameter watchlist_topic must specify the Web.TopicName of the topic to update. A list of URL parameters named watchlist_item represents the list of watched topics, each one of format Web.TopicName.
Action: "preferences"		Default
"preferences"	Action: Show a form with preferences options. The form action points to the "updatepreferences" action.
notification="..."	Notification preference: "n0" - none, "n1" immediate, "n2" digest. The plugin stores the notification preference using this variable action in the user's watchlist topic.	"n0"
Action: "updatepreferences"		Default
"updatepreferences"	Action: Update the watchlist preferences. The URL parameter watchlist_topic must specify the Web.TopicName of the topic to update. The URL parameter named notification indicates the new preference, one of n0, n1 or n2.

Notes:

• Default values indicated by {...} are abbreviated configure settings. For example {ChangesFormat} is the {Plugins}{WatchlistPlugin}{ChangesFormat} configure setting.
• The plugin takes also action on a watchlist_action URL parameter. If present, one of the above actions are taken.

This plugin has a WatchlistTemplate topic and two e-mail templates.

1. WatchlistTemplate:

The WatchlistTemplate topic is used as a template for user watchlist topics. It contains a tab interface with three tabs showing the recent changes, the watchlist topics, and the preferences.

2. watchlistdigestnotify.tmpl:

The watchlistdigestnotify.tmpl template file is the e-mail template for digest notification. It is located in the twiki/templates directory. The plugin handles the TWiki variables, and in addition these special variables:

Variable	Expands to
%WATCHLISTTO%	E-mail "To" list, comma-space separated
%WATCHCHANGESTEXT%	The watchlist changes in text format. The format of a changes entry is defined by the {Plugins}{WatchlistPlugin}{NotifyTextFormat} configure setting
%WATCHLISTUSER%	WikiName of user being notified

3. watchlistimmediatenotify.tmpl:

The watchlistimmediatenotify.tmpl template file is the e-mail template for immediate notification. It is located in the twiki/templates directory. The plugin handles the TWiki variables, and in addition these special variables:

Variable	Expands to
%WATCHLISTTO%	E-mail "To" list, comma-space separated
%WATCHLISTUSER%	WikiName of user being notified
%WATCHWEB%	Name of updated topic
%WATCHTOPIC%	Name of updated web
%WATCHTITLE%	Title of updated topic
%WATCHUSER%	WikiName of last author of updated topic
%WATCHREV%	Revision of updated topic
%WATCHDATE%	Update date of of topic

1. Plugin Installation:

• For an automated installation, run the configure script and follow "Find More Extensions" in the in the Extensions section.
  • See the installation supplement  on TWiki.org for more information.

• Or, follow these manual installation steps:
  • Download the ZIP file from the Plugins home (see below).
  • Unzip WatchlistPlugin.zip in your twiki installation directory. Content:

    File:	Description:
    data/TWiki/WatchlistPlugin.txt	Plugin topic
    data/TWiki/WatchlistTemplate.txt	Template topic for watchlist topics
    pub/TWiki/WatchlistPlugin/*png	Screenshots
    templates/watchlistdigestnotify.tmpl	E-mail template for digest notification
    templates/watchlistimmediatenotify.tmpl	E-mail template for immediate notification
    lib/TWiki/Plugins/WatchlistPlugin.pm	Plugin Perl module
    lib/TWiki/Plugins/WatchlistPlugin/Core.pm	Plugin core module
    lib/TWiki/Plugins/WatchlistPlugin/Config.spec	Configure spec file
    tools/watchlistnotify	Command-line script for digest notification

  • Set the ownership of the extracted directories and files to the webserver user.

2. Plugin Configuration and Testing:

• Run the configure script and enable the plugin in the Plugins section.
• Configure additional plugin settings in the Extensions section if needed. Settings:
  $TWiki::cfg{Plugins}{WatchlistPlugin}{ChangesFormat} # Format of one line of recently changed topics in the watchlist. Supported variables: $web: Name of web, $topic: Topic name, $title: Topic title, $date: Date of last change, $rev: Last revision number, $wikiname: WikiName of last user, $n or $n(): Newline.
  $TWiki::cfg{Plugins}{WatchlistPlugin}{ChangesHeader} # Format of the header of the recently changed topic list. Supported variable: $n or $n(): Newline.
  $TWiki::cfg{Plugins}{WatchlistPlugin}{ChangesFooter} # Format of the footer of the recently changed topic list. Supported variable: $n or $n(): Newline.
  $TWiki::cfg{Plugins}{WatchlistPlugin}{EmptyMessage} # Text shown in the recent changes and watchlist topics screen if no topics are watched.
  $TWiki::cfg{Plugins}{WatchlistPlugin}{NotifyTextFormat} # Format of one topic in the digest notification e-mail. Supported variables: $web: Name of web, $topic: Topic name, $title: Topic title, $date: Date of last change, $rev: Last revision number, $wikiname: WikiName of last user, $viewscript: URL of view script, $n: newline.
  $TWiki::cfg{Plugins}{WatchlistPlugin}{AnchorName} # Anchor name to jump to after submit. Leave empty for no anchor jump.
  $TWiki::cfg{Plugins}{WatchlistPlugin}{UseEmailField} # Use the "Email" form field of user profile topics instead of the e-mail stored in the password system. This is useful if LDAP authentication is used.
  $TWiki::cfg{Plugins}{WatchlistPlugin}{Debug} # Debug plugin. See output in data/debug.txt

3. Configure Cron for Digest Notification:

You need to set up a cron (or equivalent) job to run the tools/watchlistnotify script. The script must be run as the webserver user and can be used as follows from the command-line:

$ cd /var/www/twiki/bin
$ ../tools/watchlistnotify

Change first to the twiki bin directory so that the script can find the TWiki libraries.

An optional quiet=1 parameter can be specified to suppress progress output.

This example shows a crontab entry for user apache on a RedHat or CentOS server that sends daily digest notification at 01:00, and logs the progress output:

00 01 * * * (cd /var/www/twiki/bin; nice ../tools/watchlistnotify >/var/www/twiki/data/watchlistnotify-log.txt 2>&1)

The tool can also be called from any directory if the twiki bin directory is specified. Example:

00 00 * * * cd /var/www/twiki/tools && perl -I /var/www/twiki/bin ./watchlistnotify quiet=1

Note: Multiple instances of the watchlistnotify script are not allowed to be executed simultaneously.

4. Upgrade the TopMenuSkin to get a "Watch" Pulldown Menu:

To show a "Watch" pulldown menu next to the "Edit" pulldown, upgrade the TopMenuSkin to version 2013-02-26 or later, or add the following to TopMenuSkinTopicMenu just before the %STOPINCLUDE%:

%IF{
 "context WatchlistPluginEnabled AND context authenticated"
 then="   * $percntWATCHLIST{ \"showwatchlink\" format=\"<a href='$url' title='$watch this topic'>$watch %ICON{ "menu-down" format="<img src='$urlpath' width='$width' height='$height' border='0' alt='' />" }%</a>\" }$percnt
      * $percntWATCHLIST{ \"showwatchlistlink\" format=\"[[$url][Watchlist Changes]]\" }$percnt"
 else="<nop>"
}%

5. Upgrade the TWikiUserMappingContrib to get the "Watchlist Changes" box in the user profile topics:

To add the "Watchlist Changes" box to the user profile topics, upgrade the TWikiUserMappingContrib to version 2013-02-26 or later, or update the Public.UserProfileHeader to the latest version at TWikisvn:TWikiUserMappingContrib/data/Main/UserProfileHeader.txt.

6. Patch viewtopicactionbuttons to get a "Watch" Link in the Topic Action Row:

To add a "Watch" link to the bottom topic action row, edit templates/viewtopicactionbuttons.tmpl and make the following two modifications.

1. In template definition %TMPL:DEF{"topicactionbuttons"}%, add %TMPL:P{"action_watch"}% before %TMPL:P{"action_printable"}%.

2. Add the following two template definitions:

%TMPL:DEF{"action_watch"}%%TMPL:P{context="WatchlistPluginEnabled" then="watch_link" else=""}%%TMPL:END%

%TMPL:DEF{"watch_link"}%<span>%IF{ "context authenticated" then="$percntWATCHLIST{showwatchlink}$percnt" else="<strike>Watch</strike>" }%</span>%TMPL:P{"sep"}%%TMPL:END%

7. Test the Plugin:

Test if the installation was successful by watching and unwatching topics.

2014-05-20:	TWikibug:Item7411: In list of webs, exclude webs the current user has no view access
2014-05-19:	TWikibug:Item7495: Execute bit missing in tools/watchlistnotify; doc fix
2014-04-30:	TWikibug:Item7411: Layout improvements in watchlist topic; doc fixes
2014-02-06:	TWikibug:Item7411: Improve caching, correct order of change processing, fix table alignment, add watch all topics in web and watch new topics in web, apply perltidy, report last change date in verbose watchlistnotify, make watchlistnotify run under 4.x, fix for mod_perl & mod_perl-masked environment -- TWiki:Main.TimotheLitt
2014-01-16:	TWikibug:Item7409: Don't notify oneself -- TWiki:Main.TimotheLitt
2013-04-11:	TWikibug:Item7154: Minor doc fixes
2013-03-15:	TWikibug:Item7215: Log watchlist changes & e-mail notification actions
2013-03-15:	TWikibug:Item7143: Change default notification from "none" to "immediate"
2013-03-11:	TWikibug:Item7143: Sanitize watchlist_topic parameter
2013-03-06:	TWikibug:Item7143: Support new $title variable that expands to the topic title, or the spaced topic name if the title does not exist
2013-03-05:	TWikibug:Item7143: The "showwatchlistlink" action now returns full URL instead of Web.Topic link so that it can be used in a a HTML tag.
2013-03-04:	TWikibug:Item7143: Initial version