<?php
################################################################################
## LEGACY API: Replicate or mock up functions for legacy support purposes ######
################################################################################

class FeedWordPressCompatibility {
	// version testing based on database schema version
	/*static*/ function test_version ($floor, $ceiling = null) {
		global $wp_db_version;
		
		$ver = (isset($wp_db_version) ? $wp_db_version : 0);
		$good = ($ver >= $floor);
		if (!is_null($ceiling)) :
			$good = ($good and ($ver < $ceiling));
		endif;
		return $good;
	} /* FeedWordPressCompatibility::test_version() */

	/*static*/ function insert_link_category ($name) {
		global $wpdb;

		$name = $wpdb->escape($name);

		// WordPress 2.3+ term/taxonomy API
		$term = wp_insert_term($name, 'link_category');
		$cat_id = $term['term_id'];
		
		// Return newly-created category ID
		return $cat_id;
	} /* FeedWordPressCompatibility::insert_link_category () */

	/*static*/ function link_category_id ($value, $key = 'cat_name') {
		global $wpdb;

		$cat_id = NULL;

		$the_term = term_exists($value, 'link_category');

		// Sometimes, in some versions, we get a row
		if (is_array($the_term)) :
			$cat_id = $the_term['term_id'];

		// other times we get an integer result
		else :
			$cat_id = $the_term;
		endif;
		
		return $cat_id;
	} /* FeedWordPressCompatibility::link_category_id () */

	/*static*/ function post_tags () {
		return FeedWordPressCompatibility::test_version(FWP_SCHEMA_23);
	} /* FeedWordPressCompatibility::post_tags () */

	/*static*/ function validate_http_request ($action = -1, $capability = null) {
		// Only worry about this if we're using a method with significant side-effects
		if (strtoupper($_SERVER['REQUEST_METHOD']) == 'POST') :
			// Limit post by user capabilities
			if (!is_null($capability) and !current_user_can($capability)) :
				wp_die(__('Cheatin&#8217; uh?'));
			endif;

			// If check_admin_referer() checks a nonce.
			if (function_exists('wp_verify_nonce')) :
				check_admin_referer($action);

			// No nonces means no checking nonces.
			else :
				check_admin_referer();
			endif;
		endif;
	} /* FeedWordPressCompatibility::validate_http_request() */
	
	/*static*/ function stamp_nonce ($action = -1) {
		// stamp form with hidden fields for a nonce in WP 2.0.3 & later
		if (function_exists('wp_nonce_field')) :
			wp_nonce_field($action);
		endif;
	} /* FeedWordPressCompatibility::stamp_nonce() */
	
	/*static*/ function bottom_script_hook ($filename) {
		global $fwp_path;

		$hook = 'admin_footer';
		if (FeedWordPressCompatibility::test_version(FWP_SCHEMA_28)) : // WordPress 2.8+
			$hook = $hook . '-' . $fwp_path . '/' . basename($filename);
		endif;
		return $hook;
	} /* FeedWordPressCompatibility::bottom_script_hook() */
} /* class FeedWordPressCompatibility */

define('FEEDWORDPRESS_AND_TAGS', (FeedWordPressCompatibility::post_tags() ? ' & Tags' : ''));

if (!function_exists('stripslashes_deep')) {
	function stripslashes_deep($value) {
		$value = is_array($value) ? array_map('stripslashes_deep', $value) : stripslashes($value);
		return $value;
	}
}

if (!function_exists('sanitize_user')) {
	function sanitize_user ($text, $strict = false) {
		return $text; // Don't munge it if it wasn't munged going in...
	}
}

if (!function_exists('disabled')) {
	/**
	 * Outputs the html disabled attribute.
	 *
	 * Compares the first two arguments and if identical marks as disabled
	 *
	 * @since 3.0.0
	 *
	 * @param mixed $disabled One of the values to compare
	 * @param mixed $current (true) The other value to compare if not just true
	 * @param bool $echo Whether to echo or just return the string
	 * @return string html attribute or empty string
	 */
	function disabled( $disabled, $current = true, $echo = true ) {
		return __checked_selected_helper( $disabled, $current, $echo, 'disabled' );
	}
} /* if */

if (!function_exists('term_exists')) {
	// Fucking WordPress 3.0 wordsmithing.
	function term_exists ( $term, $taxonomy = '', $parent = 0 ) {
		return is_term($term, $taxonomy, $parent);
	}
} /* if */

require_once(dirname(__FILE__).'/feedwordpress-walker-category-checklist.class.php');

function fwp_category_checklist ($post_id = 0, $descendents_and_self = 0, $selected_cats = false, $params = array()) {
	if (is_string($params)) :
		$prefix = $params;
		$taxonomy = 'category';
	elseif (is_array($params)) :
		$prefix = (isset($params['prefix']) ? $params['prefix'] : '');
		$taxonomy = (isset($params['taxonomy']) ? $params['taxonomy'] : 'category');
	endif;
	
	$walker = new FeedWordPress_Walker_Category_Checklist;
	$walker->set_prefix($prefix);
	$walker->set_taxonomy($taxonomy); 
	wp_terms_checklist(/*post_id=*/ $post_id, array(
		'taxonomy' => $taxonomy,
		'descendents_and_self' => $descendents_and_self,
		'selected_cats' => $selected_cats,
		'popular_cats' => false,
		'walker' => $walker,
		'checked_ontop' => true,
	));
}

function fwp_time_elapsed ($ts) {
	if (function_exists('human_time_diff')) :
		if ($ts >= time()) :
			$ret = __(human_time_diff($ts)." from now");
		else :
			$ret = __(human_time_diff($ts)." ago");
		endif;
	else :
		$ret = strftime('%x %X', $ts);
	endif;
	return $ret;
}

################################################################################
## UPGRADE INTERFACE: Have users upgrade DB from older versions of FWP #########
################################################################################

function fwp_upgrade_page () {
	if (isset($GLOBALS['fwp_post']['action']) and $GLOBALS['fwp_post']['action']=='Upgrade') :
		$ver = get_option('feedwordpress_version');
		if (get_option('feedwordpress_version') != FEEDWORDPRESS_VERSION) :
			echo "<div class=\"wrap\">\n";
			echo "<h2>Upgrading FeedWordPress...</h2>";

			$feedwordpress = new FeedWordPress;
			$feedwordpress->upgrade_database($ver);
			echo "<p><strong>Done!</strong> Upgraded database to version ".FEEDWORDPRESS_VERSION.".</p>\n";
			echo "<form action=\"\" method=\"get\">\n";
			echo "<div class=\"submit\"><input type=\"hidden\" name=\"page\" value=\"syndication.php\" />";
			echo "<input type=\"submit\" value=\"Continue &raquo;\" /></form></div>\n";
			echo "</div>\n";
			return;
		else :
			echo "<div class=\"updated\"><p>Already at version ".FEEDWORDPRESS_VERSION."!</p></div>";
		endif;
	endif;
?>
<div class="wrap">
<h2>Upgrade FeedWordPress</h2>

<p>It appears that you have installed FeedWordPress
<?php echo FEEDWORDPRESS_VERSION; ?> as an upgrade to an existing installation of
FeedWordPress. That's no problem, but you will need to take a minute out first
to upgrade your database: some necessary changes in how the software keeps
track of posts and feeds will cause problems such as duplicate posts and broken
templates if we were to continue without the upgrade.</p>

<p>Note that most of FeedWordPress's functionality is temporarily disabled
until we have successfully completed the upgrade. Everything should begin
working as normal again once the upgrade is complete. There's extraordinarily
little chance of any damage as the result of the upgrade, but if you're paranoid
like me you may want to back up your database before you proceed.</p>

<p>This may take several minutes for a large installation.</p>

<form action="" method="post">
<?php FeedWordPressCompatibility::stamp_nonce('feedwordpress_upgrade'); ?>
<div class="submit"><input type="submit" name="action" value="Upgrade" /></div>
</form>
</div>
<?php
} // function fwp_upgrade_page ()

function remove_dummy_zero ($var) {
	return !(is_numeric($var) and ((int) $var == 0));
}