make the number of external feed items configurable (bug #547089)

Signed-off-by: Evan Goldenberg <evang@catalyst.net.nz>

htdocs/blocktype/externalfeed/lang/en.utf8/blocktype.externalfeed.php

@@ -31,6 +31,8 @@ $string['title'] = 'External Feed';
 $string['description'] = 'Embed an external RSS or ATOM feed';
 $string['feedlocation'] = 'Feed location';
 $string['feedlocationdesc'] = 'URL of a valid RSS or ATOM feed';
+$string['itemstoshow'] = 'Items to show';
+$string['itemstoshowdescription'] = 'Between 1 and 20';
 $string['showfeeditemsinfull'] = 'Show feed items in full?';
 $string['showfeeditemsinfulldesc'] = 'Whether to show a summary of the feed items, or show the description for each one too';
 $string['invalidurl'] = 'That URL is invalid. You can only view feeds for http and https URLs.';

htdocs/blocktype/externalfeed/lib.php

@@ -61,6 +61,10 @@ class PluginBlocktypeExternalfeed extends SystemBlocktype {
             $data->content = unserialize($data->content);
             $data->image   = unserialize($data->image);
 
+            // only keep the number of entries the user asked for
+            $chunks = array_chunk($data->content, $configdata['count']);
+            $data->content = $chunks[0];
+
             // Attempt to fix relative URLs in the feeds
             if (!empty($data->image['link'])) {
                 $data->description = preg_replace(
@@ -125,6 +129,15 @@ class PluginBlocktypeExternalfeed extends SystemBlocktype {
                     'maxlength' => 2048, // See install.xml for this plugin - MySQL can only safely handle up to 255 chars
                 ),
             ),
+            'count' => array(
+                'type' => 'text',
+                'title' => get_string('itemstoshow', 'blocktype.externalfeed'),
+                'description' => get_string('itemstoshowdescription', 'blocktype.externalfeed'),
+                'defaultvalue' => isset($configdata['count']) ? $configdata['count'] : 10,
+                'size' => 3,
+                'minvalue' => 1,
+                'maxvalue' => 20,
+            ),
             'full' => array(
                 'type'         => 'checkbox',
                 'title'        => get_string('showfeeditemsinfull', 'blocktype.externalfeed'),
@@ -308,7 +321,7 @@ class PluginBlocktypeExternalfeed extends SystemBlocktype {
 
         $data->content = array();
         foreach ($feed as $count => $item) {
-            if ($count == 10) {
+            if ($count == 20) {
                 break;
             }
             $description = $item->content ? $item->content : ($item->description ? $item->description : ($item->summary ? $item->summary : null));