bostonwp · jonbish · Aug 30, 2012 · Sep 1, 2012 · Sep 1, 2012
diff --git a/feed-redirect/feed-redirect.php b/feed-redirect/feed-redirect.php
@@ -0,0 +1,64 @@
+<?php
+/*
+Plugin Name: BWP Feed Redirect
+Plugin URI: https://github.com/BostonWP/functionality-plugins
+Description: Redirect feeds to the URL of your choice. Great for easy feedburner redirect.
+Version: 0.1
+Author: Jon Bishop
+Author URI: http://www.jonbishop.com
+License: GPL2
+*/
+function bwp_feed_settings() {
+    $feed_settings = array(
+        'feed' => 'http://wordpress.org/news/feed/',
+        'whitelist' => array(
+            'feedburner',
+            'googlebot'
+        )
+    );
+    return apply_filters('bwp_feed_settings', $feed_settings);
+}
+
+function bwp_feed_redirect() {
+    global $feed;
+    // Do nothing if not a feed
+    if (!is_feed()) {
+        return;
+    }
+
+    // Grab our feed settings
+    $feed_settings = bwp_feed_settings();
+
+    // Do nothing if whitelisted user-agent
+    foreach ($feed_settings['whitelist'] as $whitelist){
+        if (preg_match('/'.$whitelist.'/i', $_SERVER['HTTP_USER_AGENT'])) 
+            return;
+    }
+
+    // Redirect to our feed
+    if ($feed != 'comments-rss2' && trim($feed_settings['feed']) != '') {
+        do_action('bwp_feed_redirect');
+        if (function_exists('status_header'))
+            status_header(302);
+        header("Location:" . trim($feed_settings['feed']));
+        header("HTTP/1.1 302 Temporary Redirect");
+        exit();
+    }
+}
+add_action('template_redirect', &$this, 'bwp_feed_redirect');
+
+function bwp_feedburner_feed_link($output, $feed) {
+    // Grab our feed settings
+    $feed_settings = bwp_feed_settings();
+    $feed_url = $feed_settings['feed'];
+
+    // Replace feeds
+    if (trim($feed_url) != '' && $feed != 'comments-rss2') {
+        $feed_array = array('rss' => $feed_url, 'rss2' => $feed_url, 'atom' => $feed_url, 'rdf' => $feed_url, 'comments_rss2' => '');
+        $feed_array[$feed] = $feed_url;
+        $output = $feed_array[$feed];
+    }
+    return apply_filters('bwp_feedburner_feed_link', $output);
+}
+add_filter('feed_link', &$this, 'bwp_feedburner_feed_link', 1, 2);
+?>
diff --git a/post-thumbnail-fallback/post-thumbnail-fallback.php b/post-thumbnail-fallback/post-thumbnail-fallback.php
@@ -0,0 +1,139 @@
+<?php
+
+/**
+  Plugin Name: Post Thumbnail Fallback
+  Plugin URI: https://github.com/BostonWP/functionality-plugins
+  Description: Generates HTML for a posts thumbnail using multiple fallbacks to find an image.
+  Version: .1
+  Author: Jon Bishop
+  Author URI: http://www.jonbishop.com
+  License: GPLv2 or later
+ */
+
+function bwp_get_image_html($post_thumbnail_url, $size = 'thumbnail', $attr = '') {
+    $src = $post_thumbnail_url;
+    if (is_array($size)) {
+        $width = $size[0];
+        $height = $size[1];
+    }
+    $hwstring = image_hwstring($width, $height);
+    if (is_array($size))
+        $size = join('x', $size);
+    $default_attr = array(
+        'src' => $src,
+        'class' => "attachment-$size"
+    );
+
+    $attr = wp_parse_args($attr, $default_attr);
+    $attr = apply_filters('wp_get_attachment_image_attributes', $attr);
+    $attr = array_map('esc_attr', $attr);
+    $html = rtrim("<img $hwstring");
+    foreach ($attr as $name => $value) {
+        $html .= " $name=" . '"' . $value . '"';
+    }
+    $html .= ' />';
+    return $html;
+}
+
+
+/**
+ * Returns image HTML for a post with multiple fallbacks
+ *
+ * This function generates HTML for a posts thumbnail using multiple methods to
+ * find an image.
+ * 
+ * First the function checks to see if there are any images attached the post.
+ * If there is an image, we can use built core functions to generate the html.
+ * 
+ * Next the function checks to see if there are any images in the post's content.
+ * If an image is found, the function resizes the image using the images.weserv.nl
+ * web service.
+ * 
+ * Finally the function uses flickholdr.com to generate a relavent image using the
+ * specifed dimensions.
+ * 
+ * Filters:
+ * bwp_get_image_default - Define an alternative default image to flickholdr.com
+ * bwp_get_image_html - Filter HTML generated by bwp_get_image()
+ *
+ * @param string $html Image HTML.
+ * @param int $post_id The current post's ID
+ * @param string|array $size Size of what the result image should be.
+ * @return string Image HTML.
+ */
+function bwp_get_image($html = "", $post_id = null, $size = 'featured-image', $attr) {
+    global $post, $_wp_additional_image_sizes;
+    if ($html == "") {
+
+        // First let's check for any attachments
+        $attachments = get_children(array(
+            'post_parent' => $post_id,
+            'post_type' => 'attachment',
+            'numberposts' => 1,
+            'post_status' => 'inherit',
+            'post_mime_type' => 'image',
+            'order' => 'ASC',
+            'orderby' => 'menu_order ASC'
+                ));
+        if (!empty($attachments)) {
+            foreach ($attachments as $attachment_id => $attachment) {
+                if (wp_get_attachment_image($attachment_id) != ""):
+                    $post_thumbnail_url = wp_get_attachment_url($attachment_id);
+                    $html = wp_get_attachment_image($attachment_id, $size, false, $attr);
+                endif;
+            }
+        } else {
+            // Create image dimensions for our custom image
+            if (is_array($size)) {
+                $width = $size[0];
+                $height = $size[1];
+            } else {
+                if (isset($_wp_additional_image_sizes) && count($_wp_additional_image_sizes) && in_array($size, array_keys($_wp_additional_image_sizes))) {
+                    $width = intval($_wp_additional_image_sizes[$size]['width']);
+                    $height = intval($_wp_additional_image_sizes[$size]['height']);
+                }
+            }
+
+            // Check for any images in the posts
+            $output = preg_match_all('/<img.+src=[\'"]([^\'"]+)[\'"].*>/i', $post->post_content, $matches);
+            if (!empty($matches[1][0])) {
+                $post_thumbnail_url = $matches[1][0];
+                $post_thumbnail_url = 'http://images.weserv.nl/?url=' . $post_thumbnail_url . '&h=' . $width . '&h=' . $height . '&t=fit';
+
+                // Fall back image URL    
+            } else {
+                $f_tags = array();
+                $query_tags = "";
+                // Check for tags or categories to grab relevant images
+                $categories = get_the_category();
+                foreach ($categories as $category) {
+                    $f_tags[] = $category->slug;
+                    break;
+                }
+                $tags = get_the_tags();
+                foreach ($tags as $tag) {
+                    $f_tags[] = $tag->slug;
+                    break;
+                }
+                $f_tags = array_diff($f_tags, array('uncategorized'));
+                if(!empty($f_tags)){
+                    $query_tags = implode(",", $f_tags);
+                }
+                $post_thumbnail_url = "http://flickholdr.com/" . $width . "/" . $height . "/" . $query_tags;
+                $post_thumbnail_url = apply_filters('bwp_get_image_default', $post_thumbnail_url);
+            }
+
+            // Create image html with our custom image urls
+            $html = apply_filters('bwp_get_image_html', bwp_get_image_html($post_thumbnail_url, array($width, $height), $attr));
+        }
+    }
+
+    return $html;
+}
+
+function bwp_filter_post_thumbnail($html, $post_id, $post_thumbnail_id, $size, $attr) {
+    return apply_filters('bwp_filter_post_thumbnail', bwp_get_image($html, $post_id, $size, $attr));
+}
+
+add_filter('post_thumbnail_html', 'bwp_filter_post_thumbnail', 10, 5);
+?>