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<?php

/*
Plugin Name: AHP Sitewide Recent Posts for WordPress MU
Plugin URI: http://www.metablog.us/blogging/ahp-recent-posts-plugin-for-wordpress-mu/
Description: Retrieves a list of the most recent posts sitewide in a WordPress MU installation.. Automatically excludes blog ID 1 (main blog), and post ID 1 (first "Hello World" posts of new blogs).  Flexible display output.
Author: Aziz Poonawalla
Author URI: http://metablog.us

Function arguments
$how_many: how many recent posts are being displayed
$how_long: time frame to choose recent posts from (in days)
$display:  control over output format - 
	'title' - show post title only 
	'name' - show blog name and post title, as: @name | title
	any integer value - show blog name, post title, and post excerpt of specified number of words
	NOTE: function defaults to excerpt mode, 30 words, if argument does not match the above.
$begin_wrap: customise the start html code to adapt to different themes
$end_wrap: customise the end html code to adapt to different themes
$optmask: optional bitmask for gravatar, date, and author display:
	0: hide gravatar, hide date, hide author
	1: show gravatar, hode date, hide author
	2: hide gravatar, show date, hide author
	3: show both gravatar and date, hide author
	4: hide gravatar, hide date, show author
	5: show gravatar, hode date, show author
	6: hide gravatar, show date, show author
	7: show both gravatar and date, show author
	NOTE: if argument left unspecified, will show all three

Sample call: to show 5 posts from recent 30 days, with  20 word excerpt, no gravatar, with date

<?php ahp_recent_posts_dev(5, 30, 20 , '<li>', '</li>',2); ?>

Sample CSS for gravatar styling:  img.avatar-24 { float: left; padding: 0px; border: none; margin: 4px; clear: left; }

TODO: 
- add post comment count as an option
- link gravatar icon to Extended Profile in buddypress, if installed
- widgetize
- show more than one post per blog

Version 0.5
Update Author: Aziz Poonawalla
Update Author URI: http://metablog.us
- changed gravatar link to point to all posts by author on main blog (ID = 1). 
- added date string, author output
- implemented bitmask to control gravatar, date, author output
- consolidated numwords argument with display argument

Version 0.4.1
Update Author: Aziz Poonawalla
Update Author URI: http://metablog.us
- added gravatar support, icon size 24px
- gravatar can be styled by img.avatar-24 in your css file
- gravatar image links to author's blog
- capitalization of first five words of the excerpt

Version 0.4.0 
Update Author: Aziz Poonawalla
Update Author URI: http://metablog.us
- added exclusions for first blog, first post, enabled post excerpt

Version: 0.32
Update Author: G. Morehouse
Update Author URI: http://wiki.evernex.com/index.php?title=Wordpress_MU_sitewide_recent_posts_plugin

Version: 0.31
Update Author: Sven Laqua
Update Author URI: http://www.sl-works.de/

Version: 0.3
Author: Ron Rennick
Author URI: http://atypicalhomeschool.net/
*/

function ahp_recent_posts($how_many, $how_long, $display, $begin_wrap, $end_wrap, $optmask = 7) {
	global $wpdb;
	$counter = 0;
	
	// EDIT THESE TO CUSTOMIZE THE OUTPUT
	$blog_prefix = "@";
	$auth_prefix = ' by ';
	$date_format = 'D M jS, Y';
	$grav_size = 24;
	$exc_size = 30;
	
	// optmask values: 
		switch ($optmask) {
			case 0: $use_date = 0; $use_grav = 0; $use_auth = 0; break; // 0: no gravatar, no date, no author
			case 1: $use_date = 0; $use_grav = 1; $use_auth = 0; break; // 1: gravatar, no date, no author
			case 2: $use_date = 1; $use_grav = 0; $use_auth = 0; break; // 2: no gravatar, date, no author
			case 3: $use_date = 1; $use_grav = 1; $use_auth = 0; break; // 3: gravatar, date, no author
			case 4: $use_date = 0; $use_grav = 0; $use_auth = 1; break; // 4: no gravatar, no date, author
			case 5: $use_date = 0; $use_grav = 1; $use_auth = 1; break; // 5 gravatar, no date, author
			case 6: $use_date = 1; $use_grav = 0; $use_auth = 1; break; // 6: no gravatar, date, author
			case 7: $use_date = 1; $use_grav = 1; $use_auth = 1; break; // 7: gravatar, date, author
		}
		
	// debug output to test switch over optmask
	// echo 'grav '.$use_grav.', date '.$use_date.', auth '.$use_auth;
	
	// hard-code $use_date and $use_grav
	//$use_date = 1; $use_grav = 1;
	
	// get a list of blogs in order of most recent update. show only public and nonarchived/spam/mature/deleted
	$blogs = $wpdb->get_col("SELECT blog_id FROM $wpdb->blogs WHERE
		public = '1' AND archived = '0' AND mature = '0' AND spam = '0' AND deleted = '0' AND blog_id != '1' AND
		last_updated >= DATE_SUB(CURRENT_DATE(), INTERVAL $how_long DAY)
		ORDER BY last_updated DESC");
		
	if ($blogs) {
		foreach ($blogs as $blog) {
			// we need _posts and _options tables for this to work
			$blogOptionsTable = "wp_".$blog."_options";
		    	$blogPostsTable = "wp_".$blog."_posts";
				
			// fetch  blog url
			$options = $wpdb->get_results("SELECT option_value FROM
				$blogOptionsTable WHERE option_name IN ('siteurl','blogname') 
				ORDER BY option_name DESC");

// fetch the ID, post title, post content, post date, and user's email for the latest post
			$thispost = $wpdb->get_results("SELECT $blogPostsTable.ID, $blogPostsTable.post_title, $blogPostsTable.post_content, $blogPostsTable.post_date, wp_users.display_name, wp_users.user_email, wp_users.user_login
				FROM $blogPostsTable, wp_users
				WHERE wp_users.ID = $blogPostsTable.post_author
				AND post_status = 'publish' AND post_type = 'post' 
				AND post_date >= DATE_SUB(CURRENT_DATE(), INTERVAL $how_long DAY)
				AND $blogPostsTable.id > 1 
				ORDER BY $blogPostsTable.id DESC limit 0,1");
				
			// if it is found put it to the output
			if($thispost) {
			
				// get permalink by ID. check wp-includes/wpmu-functions.php
				$thispermalink = get_blog_permalink($blog, $thispost[0]->ID);
				
				// get blog name, URL
				$thisbloglink = $options[0]->option_value;
				$thisblogname = $options[1]->option_value;
				
				// get author
				if ($use_auth) { 
					$thisauthor = ''.$auth_prefix.$thispost[0]->display_name.' ';
				} else { $thisauthor = ''; } 
				
				// get author's posts link 
				$thisuser = $thispost[0]->user_login;
				$thisuser_url = $thisbloglink."author/".$thisuser;
				
				// get gravatar
				if ($use_grav) { 
					$grav_img = get_avatar( $thispost[0]->user_email , $grav_size ); 
					$thisgravatar = '<a href="'.$thisuser_url.'">'.$grav_img.'</a>';
				} else { $thisgravatar = ''; }
				
				// get post date (nicely formatted)
				if ($use_date) { 
					$date_str = date($date_format, strtotime( $thispost[0]->post_date )) ; 					
					$thisdate = ''.$date_str.' ';
					} else { $thisdate = ''; }
												
				if ($display != "title") {
				
					if ($display != "name") { 
					
						// use integer value of $display for $numwords or default if non-integer
						if (is_numeric($display)) { $numwords = intval($display); } 
						else { $numwords = $exc_size; }
												
						// debug output for display excerpt size
						//echo 'is_numeric display = '.is_numeric($display).', numwords = '.$numwords.', display = '.$display;
					
						// just in case we end up with numwords of size zero, skip processing the content
						// and default to null excerpt
						if ($numwords == 0) { 
							$thisexcerpt = '';
						} else { 
					
							// get post content and truncate to (numwords) words
							$thiscontent = strip_tags( $thispost[0]->post_content );
							preg_match("/([\S]+\s*){0,$numwords}/", $thiscontent, $regs);
							$trunc_content = explode( ' ', trim($regs[0]) , 6 );
						
							// build the excerpt html block, capitalize first five words
							$thisexcerpt = ' '
							.strtoupper($trunc_content[0]).' '
							.strtoupper($trunc_content[1]).' '
							.strtoupper($trunc_content[2]).' '
							.strtoupper($trunc_content[3]).' '
							.strtoupper($trunc_content[4]).' '
							.$trunc_content[5].'... '
							.'<a href="'.$thispermalink.'">'					
							.'&raquo;&raquo;MORE'.'</a>'
							.'';
						}
					} else { 
						$thisexcerpt = '';
					}
				
					echo $begin_wrap.$thisgravatar.$thisdate
					.$thisauthor
					.$blog_prefix.'<a href="'.$thisbloglink.'">'
					.$thisblogname.'</a>'.' | '	
					.'<a href="'.$thispermalink.'">'					
					.$thispost[0]->post_title.'</a>'
					.$thisexcerpt.$end_wrap;
					
					$counter++;
					} else {
						echo $begin_wrap.$thisgravatar.$thisdate.$thisauthor.'<a href="'.$thispermalink
						.'">'.$thispost[0]->post_title.'</a>'.$end_wrap;
						$counter++;
					}
			}
			// don't go over the limit
			if($counter >= $how_many) { 
				break; 
			}
		}
	}
}
?>

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