<?php
/*
Part of the Ad Injection plugin for WordPress
http://www.reviewmylife.co.uk/
*/

/*  Copyright 2010 reviewmylife (contact : http://www.reviewmylife.co.uk/)

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License, version 2, as 
	published by the Free Software Foundation.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

if (!is_admin()) return;

$adinj_warning_msg_chmod = "";
$adinj_warning_msg_filewrite = "";

function adinj_checkNonce(){
	if (!empty($_POST) && check_admin_referer('_adinj_form')){
		// ok
	} else {
		echo 'Ad Injection: Nonce check has failed.';
		exit();
	}
}

function adinj_update_options($ops){
	update_option('adinj_options', $ops);
	// Refresh options from database as cached values are now invalidated
	global $adinj_data;
	$adinj_data = get_option('adinj_options');
}

function adinj_save_options(){
	// TODO investigate register_settings for a future release
	switch($_POST['adinj_action']){
	case 'Save all settings':
		adinj_checkNonce();
		
		// Extract all know options
		$default_options = adinj_default_options();
		$ops = adinj_options();
		foreach ($default_options as $key => $value){
			if (isset($_POST[$key])){
				$ops[$key] = $_POST[$key];
			}
		}
		
		extract_text_args('ad_code_random_', $ops, 1, 5, ADINJ_AD_PATH.'/ad_random_');
		extract_text_args('ad_code_top_', $ops, 1, 5, ADINJ_AD_PATH.'/ad_top_');
		extract_text_args('ad_code_bottom_', $ops, 1, 5, ADINJ_AD_PATH.'/ad_bottom_');
		
		extract_text_args('ad_code_random_alt_', $ops, 1, 2, ADINJ_AD_PATH.'/ad_random_alt_');
		extract_text_args('ad_code_top_alt_', $ops, 1, 2, ADINJ_AD_PATH.'/ad_top_alt_');
		extract_text_args('ad_code_bottom_alt_', $ops, 1, 2, ADINJ_AD_PATH.'/ad_bottom_alt_');
		
		extract_text_args('ad_referrers', $ops);
		extract_text_args('blocked_ips', $ops);
		
		adinj_update_options($ops);
		
		if ($ops['ad_insertion_mode'] == 'mfunc') {
			adinj_write_config_file();
		}

		break;

		case 'Reset to Default':
		adinj_checkNonce();
		adinj_update_options(adinj_default_options());
		break;
		
		case 'Delete settings from DB':
		adinj_checkNonce();
		delete_option('adinj_options');
		
		case 'Delete widget settings from DB':
		adinj_checkNonce();
		delete_option('widget_adinj');
		// TODO add option to delete ads files as well
		break;
	}
}

function extract_text_args($name, &$ops, $start=NULL, $end=NULL, $save_path_stem=NULL){
	if ($start === NULL){
		if (isset($_POST[$name])){
			$ops[$name] = stripslashes($_POST[$name]);
			if ($save_path_stem != NULL){
				write_ad_to_file($ops[$name], $save_path_stem.'1.txt');
			}
		}
	} else {
		for ($i = $start; $i<=$end; ++$i){
			if (isset($_POST[$name.$i])){
				$ops[$name.$i] = stripslashes($_POST[$name.$i]);
				if ($save_path_stem != NULL){
					write_ad_to_file($ops[$name.$i], $save_path_stem.$i.'.txt');
				}
			}
		}
	}
}

// Test reminder: These generated functions won't exist until the first save
// so be careful if adding any new ones - they might not exist yet, but could
// still be referenced by adshow.
function adinj_write_config_file(){
	$ops = adinj_options();
	if ($ops['ad_insertion_mode'] != 'mfunc') return;
	
	$sevisitors_only = adinj_ticked('sevisitors_only')?'true':'false';
	$referrer_list = adinj_quote_list('ad_referrers');
	
	$block_ips = adinj_ticked('block_ips')?'true':'false';
	$ip_list = adinj_quote_list('blocked_ips');
	
	// TODO
	$block_keywords = adinj_ticked('block_keywords')?'true':'false';
	$keyword_list = adinj_quote_list('blocked_keywords');
	
	$debug_mode = adinj_ticked('debug_mode')?'true':'false';
	
	// TODO remove these from config file later...
	$legacy_funcs = '
function adinj_config_add_tags_rnd($ad) { return ""; }
function adinj_config_add_tags_top($ad) { return ""; }
function adinj_config_add_tags_bottom($ad) { return ""; }
';
	
	$config = <<<CONFIG
<?php
/*
Ad Injection config file
DO NOT EDIT MANUALLY
This file is generated by Ad Injection
*/

function adinj_config_sevisitors_only() { return $sevisitors_only; }
function adinj_config_search_engine_referrers() { return array($referrer_list); }

function adinj_config_block_ips() { return $block_ips; }
function adinj_config_blocked_ips() { return array($ip_list); }

//TODO not yet implemented
function adinj_config_block_keywords() { return $block_keywords; }
function adinj_config_blocked_keywords() { return array($blocked_keywords); }

function adinj_config_debug_mode() { return $debug_mode; }

// Don't use these - they will be deleted soon
$legacy_funcs

?>
CONFIG;

	adinj_write_file(ADINJ_CONFIG_FILE, $config, 0640);

}

function adinj_write_file($path, $content, $permission){
	$ops = adinj_options();
	global $adinj_warning_msg_filewrite;
	
	$dir = dirname($path);
	if (!@file_exists($dir)){
		if (!@mkdir($dir, 0750)){
			@mkdir($dir, 0755) or $adinj_warning_msg_filewrite .= "<br />Warning: could not create dir: ".$dir.". Please create it manually and try again.";
		}		
	}
	
	$handle = @fopen($path, "w");
	if (strlen($content) > 0){
		@fwrite($handle, $content) or $adinj_warning_msg_filewrite .= "<br />Warning: could not write to file: $path";
	}
	@fclose($handle);
	if (@file_exists($path)){
		adinj_chmod($path, $permission);
	}
}

function adinj_chmod($path, $permission){
	global $adinj_warning_msg_chmod;
	$oldperm = substr(decoct(@fileperms($path)), -3);
	$newperm = decoct($permission);
	if ($newperm == $oldperm) return;
	@chmod($path, $permission) or $adinj_warning_msg_chmod .=  "<br />Warning: chmod $permission " .
		"on $path failed. Current permissions: $oldperm<br />	Try manually updating the permission if problems occur.";
}

function adinj_get_logo(){
	return '<a href="http://www.reviewmylife.co.uk/" target="_new"><img src="'. WP_PLUGIN_URL . '/ad-injection/rml-micro-logo.png" width="16" height="16" border="0" alt="reviewmylife" /></a>';
}
	
function adinj_options_page(){
	if (isset($_POST['adinj_action'])){
		adinj_save_options();
	}
	
	adinj_upgrade_db_if_necessary();
	$ops = adinj_options();
	
	echo '<div class="wrap" style="width:950px;">';

	if (adinj_problem_with_wpminify_check()){
		echo '<div id="ad-injection-warning" class="error"><p><strong>';
		echo adinj_get_problem_with_wpminify_message();
		echo '</strong></p></div>';
	}
	
	echo '<div id="icon-options-general" class="icon32"></div><h2>Ad Injection ' . adinj_get_version() . adinj_get_logo() . '</h2>';
	
	adinj_top_message_box();
	
	adinj_admin_tabs();
	
	echo '<form name="adinjform" method="post" action="">';
	wp_nonce_field('_adinj_form');
	
	echo '<div style="width:258px; float:right;">';
	
	switch( $_GET[ 'tab' ] ) {
	case "adrotation":
		require_once(ADINJ_PATH . '/ui-tab-adrotation.php');
		adinj_side_info_box();
		echo '</div>';
		adinj_tab_adrotation();
		break;
	case "main":
	default:
		require_once(ADINJ_PATH . '/ui-tab-main.php');
		adinj_side_status_box();
		adinj_side_info_box();
		echo '</div>';
		adinj_tab_main();
		break;
	}
	
	echo '</form>';
	echo '</div> <!--wrap-->';
}

function adinj_top_message_box(){
	$ops = adinj_options();
	if (isset($_POST['adinj_action'])) {
        echo '<div id="message" class="updated below-h2"><p style="line-height:140%"><strong>';
        echo 'All settings saved: ';
		if (is_plugin_active('wp-super-cache/wp-cache.php')){
			echo "You might need to <a href='options-general.php?page=wpsupercache&amp;tab=tester'>clear your WP Super Cache cache</a> for the settings to take effect.";
		} else if (is_plugin_active('w3-total-cache/w3-total-cache.php')){
			echo "You might need to <a href='options-general.php?page=w3tc_general'>clear your W3 Total Cache cache</a> for the settings to take effect.";
		} else if (is_plugin_active('wp-cache/wp-cache.php')){
			echo "You might need to <a href='options-general.php?page=wp-cache/wp-cache'>clear your WP Cache cache</a> for the settings to take effect.";
		} else {
			echo "If you are using a caching plugin you might need to delete its cache for any changes to take effect.";
        }
		echo '</strong>';
		if ($ops['debug_mode']=='on' && $ops['ads_enabled'] == 'on'){
			echo "<br /><b>Recommendation:</b> Turn <a href='#debugging'>debug mode off</a> once you have got your ads working.";
		}
		if ($ops['ad_insertion_mode']=='mfunc'){
			if (!is_supported_caching_plugin_active()){
				echo "<br /><b>Recommendation:</b> It looks like you don't have a supported caching plugin (WP Super Cache, W3 Total Cache or WP Cache) active. Therefore one of the <a href='#restrictions'>direct insertion modes</a> might be better for you.";
			}
			global $adinj_warning_msg_filewrite;
			if (!empty($adinj_warning_msg_filewrite)){
				echo $adinj_warning_msg_filewrite;
				echo "<br />Workaround: If you are unable to fix these errors you will have to switch to a <a href='#restrictions'>direct insertion mode</a> (however dynamic features won't work if you are using a caching plugin).";
			}
		}
		global $adinj_warning_msg_chmod;
		if (!empty($adinj_warning_msg_chmod)){
			echo '<br />Info: Some warnings were generated by chmod. See the <a href="#debugging">debugging</a> section for more info.';
		}
		if ($ops['ads_enabled'] != 'on'){
			echo '<br /><font color="red">Warning: Ads are not enabled. You need to turn the ads on for everyone to see them.</font>';
		}
		echo '</p></div>';
		
	} else {
		echo '<div id="message" class="updated below-h2"><p style="line-height:140%"><strong>';
		echo "25th January 2011: Widget padding fixes, and a new option to specify how the page length is calculated. Please contact me ASAP if you spot any bugs, or odd behaviour via the ".'<a href="'.adinj_feedback_url().'" target="_new">quick feedback form</a>.';
		echo '</strong></p></div>';
	}
}

function adinj_side_info_box(){
?>
	<div class="postbox-container" style="width:258px;">
		<div class="metabox-holder">	
		<div class="meta-box-sortables">
		<div class="postbox">
		<h3 class="hndle"><span><?php echo adinj_get_logo(); ?> Info</span></h3>
		<div class="inside" style="margin:5px;">
			<h4>More Ad Injection information</h4>
			<ul>
			<li><a href="http://wordpress.org/extend/plugins/ad-injection/" target="_new">Ad Injection at WordPress (docs, FAQ)</a></li>
			<li><a href="http://www.reviewmylife.co.uk/blog/2010/12/06/ad-injection-plugin-wordpress/" target="_new">Ad Injection at reviewmylife</a></li>
			<li><b><a href="<?php echo adinj_feedback_url(); ?>" target="_new">Report a bug / give feedback</a></b></li>
			</ul>
			
			<h4><font color="red">Important!</font></h4>
			<p>You are responsible for making sure the ad settings and positioning you define are in compliance with your ad provider's terms of service! Failure to do so could get you banned by them!</p>
		
			<h4><font color="red">In developement</font></h4>
			<p>This plugin is only a few months old. I'm actively listening to your feedback and fixing any problems, and adding new features that you request. Please let me know if you like the plugin too!</p>
			
			<h4>More by this author</h4>
			<ul>
			<li><a href="http://www.reviewmylife.co.uk/" target="_new">www.reviewmylife.co.uk</a></li>
			<li><a href="http://www.advancedhtml.co.uk/" target="_new">www.advancedhtml.co.uk</a></li>
			</ul>
		</div>
		</div>	
		</div>
		</div>
	</div> 
	<?php
}

function adinj_feedback_url(){
	$wp_version = get_bloginfo('version');
	$ad_version = adinj_get_version();
	$data = urlencode($wp_version." / ".$ad_version);
	return "https://spreadsheets.google.com/viewform?formkey=dFUwZzBYcG1HNzNKMmJZdWFDdFhkY0E6MQ&amp;entry_3=$data";
}

function adinj_add_checkbox($name){
	echo '<input type="hidden" name="'.$name.'" value="off" />';
	echo '<input type="checkbox" name="'.$name.'" '.adinj_ticked($name).' />';
}

// From WP Super cache
function adinj_admin_tabs( $current = 0 ) {
	global $wp_db_version;
	if ( $current == 0 ) {
		if ( isset( $_GET[ 'tab' ] ) ) {
			$current = $_GET[ 'tab' ];
		} else {
			$current = 'main';
		}
	}
	$tabs = array( 'main' => __( 'Main', 'ad-injection' ), 'adrotation' => __( 'Ad pool: (Rotation / A:B Testing / Alternate content)', 'ad-injection' ) );
	$links = array();
	foreach( $tabs as $tab => $name ) {
		if ( $current == $tab ) {
			$links[] = "<a class='nav-tab nav-tab-active' href='?page=ad-injection&amp;tab=$tab'>$name</a>";
		} else {
			$links[] = "<a class='nav-tab' href='?page=ad-injection&amp;tab=$tab'>$name</a>";
		}
	}
	
	echo '<div id="nav"><h2 class="themes-php">';
	echo implode( "", $links );
	echo '</h2></div>';
}

function adinj_postbox_start($title, $anchor, $width='650px'){
	$ops = adinj_options();
	?>
	<div class='postbox-container' style='width:<?php echo $width; ?>;float:left; clear:left;'>
	<div class="metabox-holder">
	<div class="postbox">
	<input type="submit" style="float:right" class="button-primary" name="adinj_action" value="<?php _e('Save all settings', 'adinj') ?>" />
	<?php
	$anchorclick = $anchor.'_click';
	$anchorupdate = $anchor.'_update';
	$anchorhide = 'ui_'.$anchor.'_hide';
echo <<<HTML
	<a href="#" onclick='javascript:$anchorclick();return false;' style="float:right;display:none" id="toggle-$anchor" class="button">Show/Hide</a>
	<script type="text/javascript">

	jQuery(document).ready(function(){
		$anchorupdate();
		jQuery('#toggle-$anchor').show();
	});
	
	function $anchorclick(){
		jQuery('#$anchorhide').val(!jQuery('.$anchor-box').is(":hidden"));
		$anchorupdate();
		jQuery('.$anchor-box').slideToggle(1000);
		return false;
	}
	
	function $anchorupdate(){
		if (jQuery('#$anchorhide').val() == 'false'){
			jQuery('#toggle-$anchor').text('Hide');
		} else {
			jQuery('#toggle-$anchor').text('Show');
		}
	}
	</script>
HTML;
	?>
	<input type='hidden' id='ui_<?php echo $anchor; ?>_hide' name='ui_<?php echo $anchor; ?>_hide' value='<?php echo $ops['ui_'.$anchor.'_hide']; ?>' />
	<h3><?php $info = adinj_get_status($anchor); echo adinj_dot($info[0]); ?> <a name="<?php echo $anchor; ?>"></a><?php echo adinj_get_logo() . ' ' . $title; ?></h3>
	<?php if($ops['ui_'.$anchor.'_hide'] == 'true'){ ?>
	<script type="text/javascript">
        document.write('<style type="text/css" media="screen">#<?php echo $anchor; ?>-box { display: none; }</style>');
	</script>
	<div id="<?php echo $anchor; ?>-box" class="<?php echo $anchor; ?>-box">
	<?php } else { ?>
	<div class="<?php echo $anchor; ?>-box">
	<?php } ?>
	<div class="inside" style="margin:10px">

	<?php
}

function adinj_postbox_end(){
	echo '
	</div> <!--inside-->
	</div> <!--anchor-box-->
	</div> <!--postbox-->
	</div> <!--metabox-holder-->
	</div> <!--postbox-container-->';
}

function adinj_get_status($name){
	$ops = adinj_options();
	$status[] = 'black';
	$status[] = 'Error...';
	if ($name == 'global'){
		if ($ops['exclude_front'] == 'on' &&
			$ops['exclude_home'] == 'on' &&
			$ops['exclude_page'] == 'on' &&
			$ops['exclude_single'] == 'on' &&
			$ops['exclude_archive'] == 'on'){
			$status[0] = 'red';
			$status[1] = 'excluded from all';
			return $status;
		}
		$val = $ops['ads_enabled'];
		if ($val == 'on'){
			$status[0] = 'green';
			$status[1] = $val;
		} else if ($val == 'off' || $val == ''){
			$status[0] = 'red';
			$status[1] = $val;
		} else if ($val == 'test'){
			$status[0] = 'orange';
			$status[1] = 'test mode';
		}
	} else if ($name == 'random'){
		$count = adinj_count_live_ads('ad_code_random_', $ops);
		if ($count == 0){
			$status[0] = 'red';
			$status[1] = 'no ads defined';
			return $status;
		}
		$val = $ops['max_num_of_ads'];
		if ($val == '0'){
			$status[0] = 'red';
		} else {
			$status[0] = 'green';
		}
		$status[1] = 'single/page: ' . $val . ' <a href="#random_single">#</a>';
	} else if ($name == 'random_home'){
		$val = $ops['max_num_of_ads_home_page'];
		if ($val == 0){
			$status[0] = 'red';
		} else {
			$status[0] = 'green';
		}
		$status[1] = 'home: ' . $val .' <a href="#random_home">#</a>';
	} else if ($name == 'random_pool'){
		$count = adinj_count_live_ads('ad_code_random_', $ops);
		$status[0] = $count == 0 ? 'red' : 'green';
		$status[1] = "ad pool: " . $count." <a href='?page=ad-injection&amp;tab=adrotation#multiple_random'>#</a>";
	} else if ($name == 'top_pool'){
		$count = adinj_count_live_ads('ad_code_top_', $ops);
		$status[0] = $count == 0 ? 'red' : 'green';
		$status[1] = "ad pool: " . $count." <a href='?page=ad-injection&amp;tab=adrotation#multiple_top'>#</a>";
	} else if ($name == 'bottom_pool'){
		$count = adinj_count_live_ads('ad_code_bottom_', $ops);
		$status[0] = $count == 0 ? 'red' : 'green';
		$status[1] = "ad pool: " . $count." <a href='?page=ad-injection&amp;tab=adrotation#multiple_bottom'>#</a>";
	} else if ($name == 'random_alt_pool'){
		$count = adinj_count_live_ads('ad_code_random_alt_', $ops);
		$status[1] = "alt pool: " . $count." <a href='?page=ad-injection&amp;tab=adrotation#ad_code_random_alt_1'>#</a>";
	} else if ($name == 'top_alt_pool'){
		$count = adinj_count_live_ads('ad_code_top_alt_', $ops);
		$status[1] = "alt pool: " . $count." <a href='?page=ad-injection&amp;tab=adrotation#ad_code_top_alt_1'>#</a>";
	} else if ($name == 'bottom_alt_pool'){
		$count = adinj_count_live_ads('ad_code_bottom_alt_', $ops);
		$status[1] = "alt pool: " . $count." <a href='?page=ad-injection&amp;tab=adrotation#ad_code_bottom_alt_1'>#</a>";
	} else if ($name == 'topad'){
		$count = adinj_count_live_ads('ad_code_top_', $ops);
		if ($count == 0){
			$status[0] = 'red';
			$status[1] = 'no ad defined';
			return $status;
		}
		$val = $ops['top_ad_if_longer_than'];
		if (adinj_disabled($val)){
			$status[0] = 'red';
			$status[1] = 'off';
		} else {
			$status[0] = 'green';
			$status[1] = 'on';
		}
	} else if ($name == 'bottomad'){
		$count = adinj_count_live_ads('ad_code_bottom_', $ops);
		if ($count == 0){
			$status[0] = 'red';
			$status[1] = 'no ad defined';
			return $status;
		}
		$val = $ops['bottom_ad_if_longer_than'];
		if (adinj_disabled($val)){
			$status[0] = 'red';
			$status[1] = 'off';
		} else {
			$status[0] = 'green';
			$status[1] = 'on';
		}
	} else if ($name == 'widgets'){
		if ($ops['widget_exclude_front'] == 'on' &&
			$ops['widget_exclude_home'] == 'on' &&
			$ops['widget_exclude_page'] == 'on' &&
			$ops['widget_exclude_single'] == 'on' &&
			$ops['widget_exclude_archive'] == 'on'){
			$status[0] = 'red';
			$status[1] = 'exclude from all';
		} else {
			$status[1] = 'see <a href="widgets.php">widgets</a> screen';
		}
	} else if ($name == 'mode'){
		$status[1] = $ops['ad_insertion_mode'];
	} else if ($name == 'restrictions'){
		if ($ops['ad_insertion_mode'] == 'direct_static'){
			$status[1] = 'n/a for direct static';
			return $status;
		}
		$status[1] = "";
		if ($ops['sevisitors_only'] == 'on'){
			$status[1] .= 'referrer';
		}
		if ($ops['block_ips'] == 'on' && !empty($ops['blocked_ips'])){
			$status[1] .= ' ip';
		}
	} else if ($name == 'debugging'){
		$val = $ops['debug_mode'];
		if ($val == 'on'){
			$status[0] = 'green';
			$status[1] = 'on';
		} else {
			$status[0] = 'red';
			$status[1] = 'off';
		}
	}
	return $status;
}

// This is for 'exclude' options so 'on' is red.
function adinj_green_or_red_dot($option){
	$ops = adinj_options();
	if ($ops[$option] == 'on'){
		return adinj_dot('red');
	} else {
		return adinj_dot('green');
	}
}

function adinj_dot($colour){
	return '<span style="color:'.$colour.'">&#x25cf;</span>';
}

function adinj_selection_box($name, $values, $type=NULL, $selected_value=NULL){
	$associative = false;
	if (!array_key_exists(0, $values)){
		// Very naive test but works for me.
		$associative = true;
	}

	if ($selected_value == NULL){
		$ops = adinj_options();
		$selected_value = $ops[$name];
	}

	echo "<select name='$name'>";
	foreach ($values as $key=>$value){
		$option_value = $value;
		if ($associative){
			$option_value = $key;
		}
		echo "<option value=\"$option_value\" ";
		if($selected_value == "$option_value") echo 'selected="selected"';
		if ($type==NULL && is_numeric($option_value)){
			$typetxt = "(chars)";
		} else {
			$typetxt = $type;
		}
		if (adinj_disabled($option_value)) $typetxt = "";
		echo ">$value $typetxt</option>";
	}
	echo "</select>";
}

function adinj_condition_table($name, $description, $type){
	$options = adinj_options();
	?>
	<table border="0">
	<tr><td>
	
	<textarea name="<?php echo $name; ?>_condition_entries" rows="2" cols="40"><?php echo $options[$name.'_condition_entries']; ?></textarea>
	
	</td><td style="vertical-align:top">
	
	<?php
		adinj_selection_box($name."_condition_mode",
			array('Only show in', 'Never show in'));
	?>
	
	<br />
	
		<?php if ($type == 'category') { ?>
	<select name="<?php echo $name; ?>_dropdown" onchange='adinj_addtext(<?php echo $name; ?>_condition_entries, this.options[this.selectedIndex].value);'>
		<option value=""><?php echo 'Add ' . $type; ?></option> 
		<?php 
		$categories = get_categories(); 
		foreach ($categories as $category) {
			$option = '<option value="'.$category->category_nicename.'">';
			$option .= $category->category_nicename;
			$option .= ' ('.$category->category_count.')';
			$option .= '</option>';
			echo $option;
		}
		?>
	</select>
	<NOSCRIPT><br /><span style="font-size:10px">As JavaScript is disabled you will have to manually type in the values.</span></NOSCRIPT>

	<?php } else if ($type == 'tag') { ?>
	
	<select name="<?php echo $name; ?>_dropdown" onchange='adinj_addtext(document.adinjform.<?php echo $name; ?>_condition_entries, this.options[this.selectedIndex].value);'>
	
		<option value=""><?php echo 'Add ' . $type; ?></option> 
		<?php 
		$tags = get_tags(); 
		foreach ($tags as $tag) {
			$option = '<option value="'.$tag->slug.'">';
			$option .= $tag->slug;
			$option .= ' ('.$tag->count.')';
			$option .= '</option>';
			echo $option;
		}
		?>
	</select>
	<NOSCRIPT><br /><span style="font-size:10px">As JavaScript is disabled you will have to manually type in the values.</span></NOSCRIPT>
	
	<?php } else {
		echo 'Type not defined: ' . $type;
	}?>
	
	</td></tr>
	<tr><td colspan="2">
	<span style="font-size:10px;">Comma separated list of <?php echo $description; ?></span>
	</td></tr>
	</table>
	<?php
}

function adinj_add_alignment_options($prefix){
	_e("Alignment", 'adinj');
	echo "<br />";
	adinj_selection_box($prefix.'align',
		array(ADINJ_DISABLED, 'left', 'center', 'right', 'float left', 'float right', 'rand lcr', 'rand float lr', 'rand all'));

	echo "<br />";

	_e("Clear (CSS)", 'adinj');
	echo "<br />";
	adinj_selection_box($prefix.'clear',
		array(ADINJ_DISABLED, 'left', 'right', 'both'));

	echo "<br />";
	
	adinj_add_margin_top_bottom_options($prefix);
}

function adinj_add_margin_top_bottom_options($prefix, $options=NULL, $topname=NULL, $bottomname=NULL){
	$tname = $prefix.'margin_top';
	$bname = $prefix.'margin_bottom';
	$tdefault = NULL;
	$bdefault = NULL;
	if ($topname != NULL){
		$tname = $topname;
		$tdefault = "margin_top";
	}
	if ($bottomname != NULL){
		$bname = $bottomname;
		$bdefault = "margin_bottom";
	}

	_e("Margin top", 'adinj');
	echo "<br />";
	adinj_selection_box($tname,
		array(ADINJ_DISABLED, 0, 1, 2, 3, 4, 5, 7, 10, 15, 20, 30), "(px)", $options[$tdefault]);
	
	echo "<br />";
	
	_e("Margin bottom", 'adinj');
	echo "<br />";
	adinj_selection_box($bname,
		array(ADINJ_DISABLED, 0, 1, 2, 3, 4, 5, 7, 10, 15, 20, 30), "(px)", $options[$bdefault]);	
}

function adinj_add_padding_top_bottom_options($prefix, $options=NULL, $topname=NULL, $bottomname=NULL){
	$tname = $prefix.'padding_top';
	$bname = $prefix.'padding_bottom';
	$tdefault = NULL;
	$bdefault = NULL;
	if ($topname != NULL){
		$tname = $topname;
		$tdefault = "padding_top";
	}
	if ($bottomname != NULL){
		$bname = $bottomname;
		$bdefault = "padding_bottom";
	}

	_e("Padding top", 'adinj');
	echo "<br />";
	adinj_selection_box($tname,
		array(ADINJ_DISABLED, 0, 1, 2, 3, 4, 5, 7, 10, 15, 20, 30), "(px)", $options[$tdefault]);
	
	echo "<br />";
	
	_e("Padding bottom", 'adinj');
	echo "<br />";
	adinj_selection_box($bname,
		array(ADINJ_DISABLED, 0, 1, 2, 3, 4, 5, 7, 10, 15, 20, 30), "(px)", $options[$bdefault]);	
}

function adinj_get_version(){
	$plugin_data=get_plugin_data(ADINJ_PATH . '/ad-injection.php');
	return $plugin_data['Version'];
}

function adinj_problem_with_wpminify_check(){
	$wpm_options = get_option('wp_minify');
	$ops = adinj_options();
	if ($wpm_options['enable_html'] == true && $ops['ad_insertion_mode'] == 'mfunc'){
		return true;
	}
	return false;
}

function adinj_get_problem_with_wpminify_message(){
	return '<font color="red">Problem: Ad Injection will not work if WP Minify is set to minify HTML whilst mfunc mode is enabled.</font><br />
			Solution: Go to <a href="options-general.php?page=wp-minify">the WP Minify settings page</a> and untick "Enable HTML Minification".';
}

function adinj_init_warning() {
	if (stripos($_SERVER["PHP_SELF"], 'plugins.php') !== false){
		echo '<div id="ad-injection-warning" class="updated fade"><p><strong>
		Ad Injection needs configuring:
		Go to <a href="options-general.php?page=ad-injection.php">the settings page</a> to configure and enable your ads.
		</strong></p></div>
		';
	}
	// TODO add option to disable message without having to go to settings.
}

function adinj_compatibility_checks() {
	if (stripos($_SERVER["PHP_SELF"], 'ad-injection') !== false){
		$wpm_options = get_option('wp_minify');
		if ($wpm_options['enable_html'] == true){
			echo '<div id="ad-injection-error" class="error"><p><strong>';
			echo adinj_get_problem_with_wpminify_message();
			echo '</strong></p></div>';
		}
	}
}

function is_supported_caching_plugin_active(){
	if (!is_plugin_active('wp-super-cache/wp-cache.php') && 
		!is_plugin_active('w3-total-cache/w3-total-cache.php') &&
		!is_plugin_active('wp-cache/wp-cache.php')){
		return false;
	}
	return true;
}

//////////////////////////////////////////////////////////////////////////////

function adinj_percentage_split($name_stem, $num, $ops, $total=NULL){
	// for old db -  TODO delete later
	if (adinj_db_version($ops) == 1){
		if ($num == 1) return '100%';
		return '0%';
	}
	
	if ($total == NULL){
		$total = adinj_total_split($name_stem, $ops);
	}

	$name = $name_stem.$num;
	$namesplit = $name.'_split';
	
	$percent = 0;
	if (!empty($ops[$name])){
		if ($total == 0){
			$percent = 0;
		} else {
			if (!empty($ops[$namesplit])){
				$percent = ($ops[$namesplit] / $total) * 100;
			}
		}
	}
	$percent = number_format($percent, 1).'%';
	return $percent;
}

function adinj_total_split($name_stem, $ops){
	$total = 0;
	for ($i=1; $i<=10; ++$i){
		$split = $name_stem.$i.'_split';
		if (!empty($ops[$name_stem.$i]) && 
				is_numeric($ops[$split]) && 
				$ops[$split] > 0){
			$total += $ops[$split];
		}
	}
	return $total;
}

function adinj_count_live_ads($name_stem, $ops){
	$total = 0;
	for ($i=1; $i<=10; ++$i){
		$split = $name_stem.$i.'_split';
		if (!empty($ops[$name_stem.$i]) && 
				is_numeric($ops[$split]) && 
				$ops[$split] > 0){
			$total += 1;
		}
	}
	return $total;
}

//////////////////////////////////////////////////////////////////////////////

// Hopefully run on install and upgrade
function adinj_activate_hook(){
	$ops = adinj_options();
	if(empty($ops)){
		// 1st Install.
		adinj_install_db();
	} else {
		// Upgrade check.
		adinj_upgrade_db_if_necessary();
	}
}

function adinj_install_db(){
	$new_options = adinj_default_options();
	// Dynamic defaults.
	if (!is_supported_caching_plugin_active()){
		$new_options['ad_insertion_mode'] = 'direct_dynamic';
	}
	adinj_update_options($new_options);
	if ($new_options['ad_insertion_mode'] == 'mfunc'){
		// Create config file.
		adinj_write_config_file();
	}
}

function adinj_upgrade_db(){
	$stored_options = adinj_options();
	$new_options = adinj_default_options();

	$stored_dbversion = adinj_db_version($stored_options);
	$new_dbversion = adinj_db_version($new_options);
	
	// 1. Copy existing options to new array. Use default as a baseline,
	// and then overwrite default with the saved ones.
	foreach ($new_options as $key => $value){
		if (array_key_exists($key, $stored_options)){
			$new_options[$key] = $stored_options[$key];
		}
	}
	
	// 2. Upgrade options if necessary.
	if ($stored_dbversion == 1){
		// Copy this to new setting
		if (adinj_ticked('first_paragraph_ad')){
			$new_options['start_from_paragraph'] = 1;
		}
		// This previously wan't configured correctly
		$new_options['block_ips'] = 'on';
	}
	
	if ($stored_dbversion < 4){
		// Maintain previous behaviour for users who upgrade
		$new_options['content_length_unit'] = 'all';
	}
	
	// 3. Bump up db version number.
	$new_options['db_version'] = $new_dbversion;
	
	// 4. Save upgraded options. 
	adinj_update_options($new_options);
	
	// 5. Update config file.
	if ($new_options['ad_insertion_mode'] == 'mfunc'){
		// Update config file
		adinj_write_config_file();
	}
}

// If the options in the database are out of sync with our default options
// then the database options will need upgrading
function adinj_options_need_upgrading($stored_options){
	$default_options = adinj_default_options();
	foreach ($default_options as $key => $value){
		if (!array_key_exists($key, $stored_options)){
			return true;
		}
	}
	foreach ($stored_options as $key => $value){
		if (!array_key_exists($key, $default_options)){
			return true;
		}
	}
	return false;
}

// All these stored in a single DB option row
function adinj_default_options(){
	return array(
		// Global settings
		'ads_enabled' => 'off',
		'ads_on_page_older_than' => '0',
		'exclude_front' => '',
		'exclude_home' => '',
		'exclude_page' => '',
		'exclude_single' => '',
		'exclude_archive' => '',
		'global_category_condition_mode' => ADINJ_ONLY_SHOW_IN,
		'global_category_condition_entries' => '',
		'global_tag_condition_mode' => ADINJ_ONLY_SHOW_IN,
		'global_tag_condition_entries' => '',
		'content_length_unit' => 'viewable',
		// Random ads
		'ad_code_random_1' => '',
		'ad_code_random_2' => '',
		'ad_code_random_3' => '',
		'ad_code_random_4' => '',
		'ad_code_random_5' => '',
		'ad_code_random_1_split' => '100',
		'ad_code_random_2_split' => '100',
		'ad_code_random_3_split' => '100',
		'ad_code_random_4_split' => '100',
		'ad_code_random_5_split' => '100',
		'ad_code_random_alt_1' => '',
		'ad_code_random_alt_2' => '',
		'ad_code_random_alt_1_split' => '100',
		'ad_code_random_alt_2_split' => '100',
		'max_num_of_ads' => '2', // single posts and pages
		'no_random_ads_if_shorter_than' => '100',
		'one_ad_if_shorter_than' => '500',
		'two_ads_if_shorter_than' => '1000',
		'three_ads_if_shorter_than' => ADINJ_RULE_DISABLED,
		'top_ad_if_longer_than' => ADINJ_RULE_DISABLED,
		'bottom_ad_if_longer_than' => ADINJ_RULE_DISABLED,
		'rnd_align' => ADINJ_DISABLED,
		'rnd_clear' => ADINJ_DISABLED,
		'rnd_margin_top' => '3',
		'rnd_margin_bottom' => '3',
		'rnd_padding_top' => ADINJ_DISABLED, //TODO
		'rnd_padding_bottom' => ADINJ_DISABLED, //TODO
		'first_paragraph_ad' => '', // TODO delete
		'start_from_paragraph' => ADINJ_DISABLED, //TODO
		'multiple_ads_at_same_position' => '',
		'rnd_category_condition_mode' => ADINJ_ONLY_SHOW_IN, //TODO
		'rnd_category_condition_entries' => '', //TODO
		'rnd_tag_condition_mode' => ADINJ_ONLY_SHOW_IN, //TODO
		'rnd_tag_condition_entries' => '', //TODO
		// Home page specific random ads
		'max_num_of_ads_home_page' => '3',
		// Top ads
		'ad_code_top_1' => '',
		'ad_code_top_2' => '',
		'ad_code_top_3' => '',
		'ad_code_top_4' => '',
		'ad_code_top_5' => '',
		'ad_code_top_1_split' => '100',
		'ad_code_top_2_split' => '100',
		'ad_code_top_3_split' => '100',
		'ad_code_top_4_split' => '100',
		'ad_code_top_5_split' => '100',
		'ad_code_top_alt_1' => '',
		'ad_code_top_alt_2' => '',
		'ad_code_top_alt_1_split' => '100',
		'ad_code_top_alt_2_split' => '100',
		'top_align' => ADINJ_DISABLED,
		'top_clear' => ADINJ_DISABLED,
		'top_margin_top' => '3',
		'top_margin_bottom' => '3',
		'top_padding_top' => ADINJ_DISABLED, //TODO
		'top_padding_bottom' => ADINJ_DISABLED, //TODO
		'top_category_condition_mode' => ADINJ_ONLY_SHOW_IN, //TODO
		'top_category_condition_entries' => '', //TODO
		'top_tag_condition_mode' => ADINJ_ONLY_SHOW_IN, //TODO
		'top_tag_condition_entries' => '', //TODO
		// Bottom ads
		'ad_code_bottom_1' => '',
		'ad_code_bottom_2' => '',
		'ad_code_bottom_3' => '',
		'ad_code_bottom_4' => '',
		'ad_code_bottom_5' => '',
		'ad_code_bottom_1_split' => '100',
		'ad_code_bottom_2_split' => '100',
		'ad_code_bottom_3_split' => '100',
		'ad_code_bottom_4_split' => '100',
		'ad_code_bottom_5_split' => '100',
		'ad_code_bottom_alt_1' => '',
		'ad_code_bottom_alt_2' => '',
		'ad_code_bottom_alt_1_split' => '100',
		'ad_code_bottom_alt_2_split' => '100',
		'bottom_align' => ADINJ_DISABLED,
		'bottom_clear' => ADINJ_DISABLED,
		'bottom_margin_top' => '3',
		'bottom_margin_bottom' => '3',
		'bottom_padding_top' => ADINJ_DISABLED, //TODO
		'bottom_padding_bottom' => ADINJ_DISABLED, //TODO
		'bottom_category_condition_mode' => ADINJ_ONLY_SHOW_IN, //TODO
		'bottom_category_condition_entries' => '', //TODO
		'bottom_tag_condition_mode' => ADINJ_ONLY_SHOW_IN, //TODO
		'bottom_tag_condition_entries' => '', //TODO
		// widgets
		'widget_exclude_front' => '',
		'widget_exclude_home' => '',
		'widget_exclude_page' => '',
		'widget_exclude_single' => '',
		'widget_exclude_archive' => '',
		// dynamic features
		'ad_insertion_mode' => 'mfunc',
		'sevisitors_only' => 'off',
		'ad_referrers' => '.google., .bing., .yahoo., .ask., search?, search., /search/',
		'block_keywords' => 'off', //TODO change to blocked referrers?
		'blocked_keywords' => '', //TODO
		'block_ips' => 'on', //TODO
		'blocked_ips' => '',
		// ui main tab
		'ui_global_hide' => 'false',
		'ui_random_hide' => 'false',
		'ui_topad_hide' => 'false',
		'ui_bottomad_hide' => 'false',
		'ui_widgets_hide' => 'false',
		'ui_restrictions_hide' => 'false',
		'ui_debugging_hide' => 'true',
		'ui_docs_hide' => 'false',
		'ui_testads_hide' => 'false',
		// ui ad rotation tab
		'ui_multiple_random_hide' => 'false',
		'ui_multiple_top_hide' => 'false',
		'ui_multiple_bottom_hide' => 'false',
		// debug
		'debug_mode' => '',
		// version
		'db_version' => ADINJ_DB_VERSION
	);
}

function adinj_getdefault($option){
	$default_options = adinj_default_options();
	return "(default: " . $default_options[$option] . ")";
}

function write_ad_to_file($ad, $ad_path){
		adinj_write_file($ad_path, $ad, 0640);
}

function adinj_init_hook() {
	$ops = adinj_options();
	if ($ops['ads_enabled'] != 'on') {
		add_action('admin_notices', 'adinj_init_warning');
	}
}

// init
add_action('init', 'adinj_init_hook');
// Config links
add_action('admin_menu', 'adinj_admin_menu_hook');
add_filter('plugin_action_links', 'adinj_options_link_hook', 10, 2); // digits = priority, num args

?>