Uploading version 1.3.0 which supports virtually all themes

git-svn-id: https://plugins.svn.wordpress.org/external-featured-image/tags/1.3.0@1208356 b8457f37-d9ea-0310-8a92-e5e31aec5664

includes/admin/edit-post.php

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+<?php
+
+// Creating box
+add_action( 'add_meta_boxes', 'nelioefi_add_url_metabox' );
+function nelioefi_add_url_metabox() {
+
+	$excluded_post_types = array(
+		'attachment', 'revision', 'nav_menu_item', 'wpcf7_contact_form',
+	);
+
+	foreach ( get_post_types( '', 'names' ) as $post_type ) {
+		if ( in_array( $post_type, $excluded_post_types ) )
+			continue;
+		add_meta_box(
+			'nelioefi_url_metabox',
+			'External Featured Image',
+			'nelioefi_url_metabox',
+			$post_type,
+			'side',
+			'default'
+		);
+	}
+
+}
+
+function nelioefi_url_metabox( $post ) {
+	$nelioefi_url = get_post_meta( $post->ID, _nelioefi_url(), true );
+	$nelioefi_alt = get_post_meta( $post->ID, '_nelioefi_alt', true );
+	$has_img = strlen( $nelioefi_url ) > 0;
+	if ( $has_img ) {
+		$hide_if_img = 'display:none;';
+		$show_if_img = '';
+	}
+	else {
+		$hide_if_img = '';
+		$show_if_img = 'display:none;';
+	}
+	?>
+	<input type="hidden" id="nelioefi_alt" name="nelioefi_alt"
+		value="<?php echo esc_attr( $nelioefi_alt ); ?>" /><?php
+	if ( $has_img ) { ?>
+	<div id="nelioefi_preview_block"><?php
+	} else { ?>
+	<div id="nelioefi_preview_block" style="display:none;"><?php
+	} ?>
+		<div id="nelioefi_image_wrapper" style="<?php
+			echo (
+				'width:100%;' .
+				'max-width:300px;' .
+				'height:200px;' .
+				'margin-top:10px;' .
+				'background:url(' . $nelioefi_url . ') no-repeat center center; ' .
+				'-webkit-background-size:cover;' .
+				'-moz-background-size:cover;' .
+				'-o-background-size:cover;' .
+				'background-size:cover;' );
+			?>">
+		</div>
+
+	<a id="nelioefi_remove_button" href="#" onClick="javascript:nelioefiRemoveFeaturedImage();" style="<?php echo $show_if_img; ?>">Remove featured image</a>
+	<script>
+	function nelioefiRemoveFeaturedImage() {
+		jQuery("#nelioefi_preview_block").hide();
+		jQuery("#nelioefi_image_wrapper").hide();
+		jQuery("#nelioefi_remove_button").hide();
+		jQuery("#nelioefi_alt").hide();
+		jQuery("#nelioefi_alt").val('');
+		jQuery("#nelioefi_url").val('');
+		jQuery("#nelioefi_url").show();
+		jQuery("#nelioefi_preview_button").parent().show();
+	}
+	function nelioefiPreview() {
+		jQuery("#nelioefi_preview_block").show();
+		jQuery("#nelioefi_image_wrapper").css('background-image', "url('" + jQuery("#nelioefi_url").val() + "')" );
+		jQuery("#nelioefi_image_wrapper").show();
+		jQuery("#nelioefi_remove_button").show();
+		jQuery("#nelioefi_alt").show();
+		jQuery("#nelioefi_url").hide();
+		jQuery("#nelioefi_preview_button").parent().hide();
+	}
+	</script>
+	</div>
+	<input type="text" placeholder="Image URL" style="width:100%;margin-top:10px;<?php echo $hide_if_img; ?>"
+		id="nelioefi_url" name="nelioefi_url"
+		value="<?php echo esc_attr( $nelioefi_url ); ?>" />
+	<div style="text-align:right;margin-top:10px;<?php echo $hide_if_img; ?>">
+		<a class="button" id="nelioefi_preview_button" onClick="javascript:nelioefiPreview();">Preview</a>
+	</div>
+	<?php
+}
+
+add_action( 'save_post', 'nelioefi_save_url' );
+function nelioefi_save_url( $post_ID ) {
+	if ( isset( $_POST['nelioefi_url'] ) ) {
+		$url = strip_tags( $_POST['nelioefi_url'] );
+		update_post_meta( $post_ID, _nelioefi_url(), $url );
+	}
+
+	if ( isset( $_POST['nelioefi_alt'] ) )
+		update_post_meta( $post_ID, '_nelioefi_alt', strip_tags( $_POST['nelioefi_alt'] ) );
+}
+
+
+

includes/admin/nelioab-campaign.php

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+<?php
+
+if ( !function_exists( 'nelioab_campaign_notice' ) ) {
+
+	add_action( 'wp_ajax_nelioab_campaign_dismiss_notice',
+		'nelioab_campaign_dismiss_notice' );
+	function nelioab_campaign_dismiss_notice() {
+		update_option( 'nelioab_campaign_last_dismiss', time() );
+		die();
+	}
+
+	$INTERVAL = 2592000; // 1 MONTH in seconds
+	if ( get_option( 'nelioab_campaign_last_dismiss', 0 ) + $INTERVAL < time() )
+		add_action( 'admin_notices', 'nelioab_campaign_notice' );
+	function nelioab_campaign_notice() {
+		$nelioab_plugin = WP_PLUGIN_DIR . '/nelio-ab-testing/main.php';
+		if ( file_exists( $nelioab_plugin ) )
+			return;
+
+		$message = '';
+		$messages = array();
+		$mailing = 'nelioefi';
+
+		$messages[0] = '<strong>Nelio A/B Testing</strong> will help you ' .
+			'deliver to every reader a <a href="http://wp-abtesting.com/' .
+			'nelio-ab-testing-publishers/?mailing=%1$s">more engaging and ' .
+			'relevant reading experience</a>.';
+
+		$messages[1] = 'Do you want to get more money out of your ' .
+			'site? <strong>Nelio A/B Testing</strong> is a <a href="' .
+			'http://wp-abtesting.com/nelio-ab-testing-business/' .
+			'?mailing=%1$s">native conversion optimization service for ' .
+			'WordPress</a> that will help you improve your site.';
+
+		$messages[2] = 'Do you want to improve your headlines and get ' .
+			'more readers? <strong>Nelio A/B Testing</strong> will help you ' .
+			'decide which headlines are more appealing!';
+
+		$messages[3] = 'If you don\'t know which is the best featured image ' .
+			'for a post, use <strong>Nelio A/B Testing</strong>. It\'ll tell you ' .
+			'which one is more appealing to your users!';
+
+		$messages[4] = 'Have you ever wondered what your visitors do in your ' .
+			'site? Subscribe to <strong>Nelio A/B Testing</strong> for free and ' .
+			'get insightful <a href="http://wp-abtesting.com/heatmaps-teach-us/' .
+			'?mailing=%1$s">Heatmaps and Clickmaps</a>.';
+
+		$message = $messages[mt_rand( 0, count( $messages )-1 )];
+		if ( wp_count_posts( 'post' )->publish > 5 * wp_count_posts( 'page' )->publish )
+			if ( mt_rand( 0, 100 ) < 30 )
+				$message = $messages[0];
+
+		$message .= ' <strong>Check our <a href="http://wp-abtesting.com/' .
+			'subscription-plans/?mailing=%1$s">subscription plans</a> and ' .
+			'try it for free</strong>.';
+
+		$message = sprintf( $message, $mailing );
+		?>
+		<div class="updated">
+			<p style="float:right;font-size:10px;text-align:right;">
+				<a id="dismiss-nelioab-campaign" href="#"><?php _e( 'Dismiss' ); ?></a>
+			</p>
+			<p style="font-size:15px;"><?php echo $message; ?></p>
+			<script style="display:none;" type="text/javascript">
+			(function($) {
+				$('a#dismiss-nelioab-campaign').on('click', function() {
+					$.post( ajaxurl, {action:'nelioab_campaign_dismiss_notice'} );
+					$(this).parent().parent().fadeOut();
+				});
+			})(jQuery);
+			</script>
+		</div>
+		<?php
+	}
+
+}
+

includes/nelio-efi-main.php

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+<?php
+
+/* =========================================================================*/
+/* =========================================================================*/
+/*             SOME USEFUL FUNCTIONS                                        */
+/* =========================================================================*/
+/* =========================================================================*/
+
+/**
+ * This function returns Nelio EFI's post meta key. The key can be changed
+ * using the filter `nelioefi_post_meta_key'
+ */
+function _nelioefi_url() {
+	return apply_filters( 'nelioefi_post_meta_key', '_nelioefi_url' );
+}
+
+/**
+ * This function returns whether the post whose id is $id uses an external
+ * featured image or not
+ */
+function uses_nelioefi( $id ) {
+	$image_url = nelioefi_get_thumbnail_src( $id );
+	if ( $image_url === false )
+		return false;
+	else
+		return true;
+}
+
+
+/**
+ * This function returns the URL of the external featured image (if any), or
+ * false otherwise.
+ */
+function nelioefi_get_thumbnail_src( $id ) {
+	$image_url = get_post_meta( $id, _nelioefi_url(), true );
+	if ( !$image_url || strlen( $image_url ) == 0 )
+		return false;
+	return $image_url;
+}
+
+
+$nelioab_first_time = true;
+function nelioefi_get_placeholder() {
+	$image_id = get_option( 'nelioefi_placeholder_id', false );
+
+	global $nelioab_first_time;
+	if ( $image_id && $nelioab_first_time ) {
+		$nelioab_first_time = false;
+		$aux = get_post( $image_id );
+		if ( empty( $aux ) ) {
+			update_option( 'nelioefi_placeholder_id', false );
+			$image_id = false;
+		}
+	}
+
+	if ( ! $image_id ) {
+		$aux = wp_upload_dir();
+		$filename  = 'nelioefi-placeholder.png';
+		$src_path  = trailingslashit( dirname( dirname( __FILE__ ) ) ) . 'assets' . DIRECTORY_SEPARATOR . $filename;
+		$dest_path = trailingslashit( $aux['basedir'] ) . $filename;
+		if ( copy( $src_path, $dest_path ) ) {
+			$attachment = array(
+				'post_mime_type' => 'image/png',
+				'post_title'     => __( 'NelioEFI\'s Placeholder', 'nelioefi' ),
+				'post_content'   => '',
+				'post_status'    => 'inherit',
+				'guid'           => trailingslashit( $aux['baseurl'] ) . $filename
+			);
+			$url = trailingslashit( $aux['baseurl'] );
+			$url = str_replace( 'https://', '', $url );
+			$url = str_replace( 'http://',  '', $url );
+			$url = substr( $url, strpos( $url, '/' ) );
+			$filename = $url . $filename;
+			$image_id = wp_insert_attachment( $attachment, $filename );
+			if ( ! is_wp_error( $image_id ) ) {
+				update_option( 'nelioefi_placeholder_id', $image_id );
+			}
+		}
+	}
+
+	return get_option( 'nelioefi_placeholder_id', false );
+}
+
+
+/* =========================================================================*/
+/* =========================================================================*/
+/*             ALL HOOKS START HERE                                         */
+/* =========================================================================*/
+/* =========================================================================*/
+
+// Set the featured image ID of the post to the transparency gif.
+add_action( 'the_post', 'nelioefi_fake_featured_image_if_necessary' );
+function nelioefi_fake_featured_image_if_necessary( $post ) {
+	if ( is_array( $post ) ) $post_ID = $post['ID'];
+	else $post_ID = $post->ID;
+
+	$wp_featured_image = get_post_meta( $post_ID, '_thumbnail_id', true );
+	$aux = get_post( $wp_featured_image );
+	if ( $wp_featured_image && empty( $aux ) ) {
+		$wp_featured_image = false;
+	}
+
+	if ( uses_nelioefi( $post_ID ) && !$wp_featured_image ) {
+		update_post_meta( $post_ID, '_thumbnail_id', nelioefi_get_placeholder() );
+	}
+	if ( ! uses_nelioefi( $post_ID ) && $wp_featured_image == -1 ) {
+		delete_post_meta( $post_ID, '_thumbnail_id' );
+	}
+
+}
+
+
+$nelioefi_images = array();
+
+// Modify the transparency gif.
+add_filter( 'image_downsize', 'nelioefi_add_image_in_placeholder', 10, 3 );
+function nelioefi_add_image_in_placeholder( $downsize, $id, $size ) {
+	if ( nelioefi_get_placeholder() == $id ) {
+		remove_filter( 'image_downsize', 'nelioefi_add_image_in_placeholder', 10, 3 );
+		$result = wp_get_attachment_image_src( $id, $size );
+		add_filter( 'image_downsize', 'nelioefi_add_image_in_placeholder', 10, 3 );
+
+		$nelioefi = get_post_meta( get_the_ID(), _nelioefi_url(), true );
+		if ( $nelioefi ) {
+			global $nelioefi_images;
+			$nelioefi_images[get_the_ID()] = $nelioefi;
+			$result[0] = $result[0] . '?id=' . get_the_ID();
+			return $result;
+		}
+	}
+	return false;
+}
+
+
+add_action( 'wp_footer', 'nelioefi_print_script' );
+function nelioefi_print_script() {
+	global $nelioefi_images; ?>
+	<script type="text/javascript">
+	(function($) {
+		var images = <?php echo json_encode( $nelioefi_images ); ?>;
+		$('img[src*=nelioefi-placeholder]').each(function() {
+			try {
+				var src = $(this).attr( 'src' );
+				var id = src.substring( src.indexOf( '=' ) + 1 );
+				var value = 'url("' + images[id] + '") no-repeat center center';
+				$(this).css( 'background', value );
+				$(this).css( '-webkit-background-size', 'cover' );
+				$(this).css( '-moz-background-size', 'cover' );
+				$(this).css( '-o-background-size', 'cover' );
+				$(this).css( 'background-size', 'cover' );
+			} catch ( e ) {}
+		});
+	})(jQuery);
+	</script>
+<?php
+}
+

main.php

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+<?php
+/**
+ * Copyright 2013 Nelio Software S.L.
+ * This script is distributed under the terms of the GNU General Public
+ * License.
+ *
+ * This script is free software: you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License as published by the Free
+ * Software Foundation, either version 3 of the License. This script 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, see <http://www.gnu.org/licenses/>.
+ */
+
+
+/*
+ * Plugin Name: Nelio External Featured Image
+ * Description: Use external images as your posts/page featured images. If you use an external service for storing your images and then linking them from your WordPress site, this plugin will perfectly fit your needs.
+ * Version: 1.3.0
+ * Author: Nelio Software
+ * Plugin URI: http://neliosoftware.com
+ * Text Domain: nelioefi
+ */
+
+// ==========================================================================
+// PLUGIN INFORMATION
+// ==========================================================================
+	define( 'NELIOEFI_PLUGIN_VERSION', '1.3.0' );
+	define( 'NELIOEFI_PLUGIN_NAME', 'Nelio External Featured Image' );
+	define( 'NELIOEFI_PLUGIN_DIR_NAME', basename( dirname( __FILE__ ) ) );
+
+// Defining a few important directories
+	define( 'NELIOEFI_ROOT_DIR', rtrim( plugin_dir_path( __FILE__ ), '/' ) );
+	define( 'NELIOEFI_DIR', NELIOEFI_ROOT_DIR . '/includes' );
+	define( 'NELIOEFI_ADMIN_DIR', NELIOEFI_DIR . '/admin' );
+
+// Some URLs...
+	define( 'NELIOEFI_ASSETS_URL', plugins_url() . '/' . NELIOEFI_PLUGIN_DIR_NAME . '/assets' );
+
+
+// REGULAR STUFF
+	require_once( NELIOEFI_DIR . '/nelio-efi-main.php' );
+
+// ADMIN STUFF
+	if ( is_admin() ) {
+		require_once( NELIOEFI_ADMIN_DIR . '/edit-post.php' );
+		require_once( NELIOEFI_ADMIN_DIR . '/nelioab-campaign.php' );
+	}
+