View source for Reinstalling deleted Joomla 1.5 core extensions

Joomla 1.5.x core component can be deleted via the /administrator back-end: Extensions > Install/Uninstall > Components
The core components Banners, News Feeds, Polls, and Weblinks can be deleted but there are no core component packages to reinstall because it's too much work to maintain.

With some FTP & phpMyAdmin knowledge you will be able to reinstall deleted core components.
In general, if you have deleted some core component by mistake, use the following steps to reinstall:
* Download & unzip the Joomla Full package of your current version
* Before following the next steps, backup your site (files + database)
* Re-upload the component's files for the front-end and the back-end (see info below)
* Re-create the reference to the component in your database with phpMyAdmin (see info below)

Next you will find the necessary information to reinstall a core component, all displayed in the format:
* Name
* Directories + files to re-upload (front-end and back-end)
* SQL query to run in phpMyAdmin to restore the reference in the jos_components table (note: assuming that your table prefix is the default jos_ )

== '''Reinstallation information per core-component''' ==

== '''Banners''' ==
Upload all files & directories under:
* /administrator/components/com_banners/
* /components/com_banners/
Use phpMyAdmin to run the following SQL statements to recreate the references:
<source lang="sql">INSERT INTO `jos_components` VALUES (1, 'Banners', '', 0, 0, '', 'Banner Management', 
'com_banners', 0, 'js/ThemeOffice/component.png', 0, 'track_impressions=0\ntrack_clicks=0\ntag_prefix=\n\n', 1);
INSERT INTO `jos_components` VALUES (2, 'Banners', '', 0, 1, 'option=com_banners', 'Active Banners', 
'com_banners', 1, 'js/ThemeOffice/edit.png', 0, '', 1);
INSERT INTO `jos_components` VALUES (3, 'Clients', '', 0, 1, 'option=com_banners&c=client', 'Manage Clients', 
'com_banners', 2, 'js/ThemeOffice/categories.png', 0, '', 1);</source>

== '''News Feeds''' ==

All files & directories under:
/administrator/components/com_newsfeeds/
/components/com_newsfeeds/
SQL:
[code]INSERT INTO `jos_components` VALUES (11, 'News Feeds', 'option=com_newsfeeds', 0, 0, '', 'News Feeds Management', 'com_newsfeeds', 0, 'js/ThemeOffice/component.png', 0, '', 1);
INSERT INTO `jos_components` VALUES (12, 'Feeds', '', 0, 11, 'option=com_newsfeeds', 'Manage News Feeds', 'com_newsfeeds', 1, 'js/ThemeOffice/edit.png', 0, 'show_headings=1\nshow_name=1\nshow_articles=1\nshow_link=1\nshow_cat_description=1\nshow_cat_items=1\nshow_feed_image=1\nshow_feed_description=1\nshow_item_description=1\nfeed_word_count=0\n\n', 1);
INSERT INTO `jos_components` VALUES (13, 'Categories', '', 0, 11, 'option=com_categories&section=com_newsfeeds', 'Manage Categories', '', 2, 'js/ThemeOffice/categories.png', 0, '', 1);[/code]

[b]Polls[/b]
All files & directories under:
/administrator/components/com_poll/
/components/com_poll/
SQL:
[code]INSERT INTO `jos_components` VALUES (10, 'Polls', 'option=com_poll', 0, 0, 'option=com_poll', 'Manage Polls', 'com_poll', 0, 'js/ThemeOffice/component.png', 0, '', 1);[/code]
And you might have to recreate the four Poll tables with example data as well:
[code]CREATE TABLE `jos_polls` (
  `id` int(11) unsigned NOT NULL auto_increment,
  `title` varchar(255) NOT NULL default '',
  `alias` varchar(255) NOT NULL default '',
  `voters` int(9) NOT NULL default '0',
  `checked_out` int(11) NOT NULL default '0',
  `checked_out_time` datetime NOT NULL default '0000-00-00 00:00:00',
  `published` tinyint(1) NOT NULL default '0',
  `access` int(11) NOT NULL default '0',
  `lag` int(11) NOT NULL default '0',
  PRIMARY KEY  (`id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=15 ;

INSERT INTO `jos_polls` VALUES (14, 'Joomla! is used for?', 'joomla-is-used-for', 11, 0, '0000-00-00 00:00:00', 1, 0, 86400);

CREATE TABLE `jos_poll_data` (
  `id` int(11) NOT NULL auto_increment,
  `pollid` int(11) NOT NULL default '0',
  `text` text NOT NULL,
  `hits` int(11) NOT NULL default '0',
  PRIMARY KEY  (`id`),
  KEY `pollid` (`pollid`,`text`(1))
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=13 ;

INSERT INTO `jos_poll_data` VALUES (1, 14, 'Community Sites', 2);
INSERT INTO `jos_poll_data` VALUES (2, 14, 'Public Brand Sites', 3);
INSERT INTO `jos_poll_data` VALUES (3, 14, 'eCommerce', 1);
INSERT INTO `jos_poll_data` VALUES (4, 14, 'Blogs', 0);
INSERT INTO `jos_poll_data` VALUES (5, 14, 'Intranets', 0);
INSERT INTO `jos_poll_data` VALUES (6, 14, 'Photo and Media Sites', 2);
INSERT INTO `jos_poll_data` VALUES (7, 14, 'All of the Above!', 3);
INSERT INTO `jos_poll_data` VALUES (8, 14, '', 0);
INSERT INTO `jos_poll_data` VALUES (9, 14, '', 0);
INSERT INTO `jos_poll_data` VALUES (10, 14, '', 0);
INSERT INTO `jos_poll_data` VALUES (11, 14, '', 0);
INSERT INTO `jos_poll_data` VALUES (12, 14, '', 0);

CREATE TABLE `jos_poll_date` (
  `id` bigint(20) NOT NULL auto_increment,
  `date` datetime NOT NULL default '0000-00-00 00:00:00',
  `vote_id` int(11) NOT NULL default '0',
  `poll_id` int(11) NOT NULL default '0',
  PRIMARY KEY  (`id`),
  KEY `poll_id` (`poll_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8 AUTO_INCREMENT=12 ;

INSERT INTO `jos_poll_date` VALUES (1, '2006-10-09 13:01:58', 1, 14);
INSERT INTO `jos_poll_date` VALUES (2, '2006-10-10 15:19:43', 7, 14);
INSERT INTO `jos_poll_date` VALUES (3, '2006-10-11 11:08:16', 7, 14);
INSERT INTO `jos_poll_date` VALUES (4, '2006-10-11 15:02:26', 2, 14);
INSERT INTO `jos_poll_date` VALUES (5, '2006-10-11 15:43:03', 7, 14);
INSERT INTO `jos_poll_date` VALUES (6, '2006-10-11 15:43:38', 7, 14);
INSERT INTO `jos_poll_date` VALUES (7, '2006-10-12 00:51:13', 2, 14);
INSERT INTO `jos_poll_date` VALUES (8, '2007-05-10 19:12:29', 3, 14);
INSERT INTO `jos_poll_date` VALUES (9, '2007-05-14 14:18:00', 6, 14);
INSERT INTO `jos_poll_date` VALUES (10, '2007-06-10 15:20:29', 6, 14);
INSERT INTO `jos_poll_date` VALUES (11, '2007-07-03 12:37:53', 2, 14);

CREATE TABLE `jos_poll_menu` (
  `pollid` int(11) NOT NULL default '0',
  `menuid` int(11) NOT NULL default '0',
  PRIMARY KEY  (`pollid`,`menuid`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;[/code]

[b]Web Links[/b]
All files & directories under:
/administrator/components/com_weblinks/
/components/com_weblinks/
SQL:
[code]INSERT INTO `jos_components` VALUES (4, 'Web Links', 'option=com_weblinks', 0, 0, '', 'Manage Weblinks', 'com_weblinks', 0, 'js/ThemeOffice/component.png', 0, 'show_comp_description=1\ncomp_description=\nshow_link_hits=1\nshow_link_description=1\nshow_other_cats=1\nshow_headings=1\nshow_page_title=1\nlink_target=0\nlink_icons=\n\n', 1);
INSERT INTO `jos_components` VALUES (5, 'Links', '', 0, 4, 'option=com_weblinks', 'View existing weblinks', 'com_weblinks', 1, 'js/ThemeOffice/edit.png', 0, '', 1);
INSERT INTO `jos_components` VALUES (6, 'Categories', '', 0, 4, 'option=com_categories&section=com_weblinks', 'Manage weblink categories', '', 2, 'js/ThemeOffice/categories.png', 0, '', 1);[/code]

Here you can discuss this topic: http://forum.joomla.org/viewtopic.php?f=429&t=284675