php - Buddypress 插件错误 - XML 到 PHP

Question

它是一个外部群组博客插件

它使您的 BuddyPress 安装上的群组创建者和管理员能够将外部博客 RSS 提要附加到群组。
博客文章将显示在群组的事件流中。
每小时或每 30 分钟自动拉取新帖子(如果有人专门访问群组页面)。

我发现了很多错误。
1)它不是自动获取提要2) 如果我尝试手动更新提要，它会重新发布相同的条目，我的意思是它不会获取新的提要。3) WordPress 管理栏也无法与此插件一起正常工作。

此插件包含 2 个网页。

首先和主页面是loader.php

<?php

/*
Plugin Name: External Group Blogs
Plugin URI: http://wordpress.org/extend/plugins/external-group-blogs/
Description: Allow group creators to supply external blog RSS feeds that will attach        future posts on blogs to a group.
*/

 /* Only load the plugin functions if BuddyPress is loaded and initialized. */
function bp_groupblogs_init() {
require( dirname( __FILE__ ) . '/bp-groups-externalblogs.php' );
}
add_action( 'bp_init', 'bp_groupblogs_init' );

/* On activation register the cron to refresh external blog posts. */
function bp_groupblogs_activate() {
wp_schedule_event( time(), 'hourly', 'bp_groupblogs_cron' );
}
register_activation_hook( __FILE__, 'bp_groupblogs_activate' );

/* On deacativation, clear the cron. */
function bp_groupblogs_deactivate() {
wp_clear_scheduled_hook( 'bp_groupblogs_cron' );

/* Remove all external blog activity */
if ( function_exists( 'bp_activity_delete' ) )
    bp_activity_delete( array( 'type' => 'exb' ) );
}
register_deactivation_hook( __FILE__, 'bp_groupblogs_deactivate' );

?>

第二个文件是 bp-groups-externalblogs.php

<?php
/* Group blog extension using the BuddyPress group extension API */
if ( class_exists('BP_Group_Extension' ) ) {

class Group_External_Blogs extends BP_Group_Extension {
    function __construct() {
        global $bp;
        $this->name = __( 'External Blogs', 'bp-groups-externalblogs' );
        $this->slug = 'external-blog-feeds';
        $this->create_step_position = 21;
        $this->enable_nav_item = false;
    }
    function create_screen() {
        global $bp;
        if ( !bp_is_group_creation_step( $this->slug ) )
            return false;
        ?>
        <p><?php _e(
            "Add RSS feeds of blogs you'd like to attach to this group in the box below.
             Any future posts on these blogs will show up on the group page and be recorded
             in activity streams.", 'bp-groups-externalblogs' ) ?>
        </p>
        <p class="desc"><?php _e( "Seperate URL's with commas.", 'bp-groups-externalblogs' ) ?></span>
        <p>
            <label for="blogfeeds"><?php _e( "Feed URL's:", 'bp-groups-externalblogs' ) ?></label>
            <textarea name="blogfeeds" id="blogfeeds"><?php echo attribute_escape( implode( ', ', (array)groups_get_groupmeta( $bp->groups->current_group->id, 'blogfeeds' ) ) ) ?></textarea>
        </p>
        <?php
        wp_nonce_field( 'groups_create_save_' . $this->slug );
    }
    function create_screen_save() {
        global $bp;
        check_admin_referer( 'groups_create_save_' . $this->slug );
        $unfiltered_feeds = explode( ',', $_POST['blogfeeds'] );
        foreach( (array) $unfiltered_feeds as $blog_feed ) {
            if ( !empty( $blog_feed ) )
                $blog_feeds[] = trim( $blog_feed );
        }
        groups_update_groupmeta( $bp->groups->current_group->id, 'blogfeeds', $blog_feeds );
        groups_update_groupmeta( $bp->groups->current_group->id, 'bp_groupblogs_lastupdate', gmdate( "Y-m-d H:i:s" ) );
        /* Fetch */
        bp_groupblogs_fetch_group_feeds( $bp->groups->current_group->id );
    }
    function edit_screen() {
        global $bp;
        if ( !bp_is_group_admin_screen( $this->slug ) )
            return false; ?>
        <p class="desc"><?php _e( "Enter RSS feed URL's for blogs you would like to attach to this group. Any future posts on these blogs will show on the group activity stream. Seperate URL's with commas.", 'bp-groups-externalblogs' ) ?></span>
        <p>
            <label for="blogfeeds"><?php _e( "Feed URL's:", 'bp-groups-externalblogs' ) ?></label>
            <textarea name="blogfeeds" id="blogfeeds"><?php echo attribute_escape( implode( ', ', (array)groups_get_groupmeta( $bp->groups->current_group->id, 'blogfeeds' ) ) ) ?></textarea>
        </p>
        <input type="submit" name="save" value="<?php _e( "Update Feed URL's", 'bp-groups-externalblogs' ) ?>" />
        <?php
        wp_nonce_field( 'groups_edit_save_' . $this->slug );
    }
    function edit_screen_save() {
        global $bp;
        if ( !isset( $_POST['save'] ) )
            return false;
        check_admin_referer( 'groups_edit_save_' . $this->slug );
        $existing_feeds = (array)groups_get_groupmeta( $bp->groups->current_group->id, 'blogfeeds' );
        $unfiltered_feeds = explode( ',', $_POST['blogfeeds'] );
        foreach( (array) $unfiltered_feeds as $blog_feed ) {
            if ( !empty( $blog_feed ) )
                $blog_feeds[] = trim( $blog_feed );
        }
        /* Loop and find any feeds that have been removed, so we can delete activity stream items */
        if ( !empty( $existing_feeds ) ) {
            foreach( (array) $existing_feeds as $feed ) {
                if ( !in_array( $feed, (array) $blog_feeds ) )
                    $removed[] = $feed;
            }
        }
        if ( $removed  ) {
            /* Remove activity stream items for this feed */
            include_once( ABSPATH . WPINC . '/rss.php' );
            foreach( (array) $removed as $feed ) {
                $rss = fetch_rss( trim( $feed ) );
                if ( function_exists( 'bp_activity_delete' ) ) {
                    bp_activity_delete( array(
                        'item_id' => $bp->groups->current_group->id,
                        'secondary_item_id' => wp_hash( $rss->channel['link'] ),
                        'component' => $bp->groups->id,
                        'type' => 'exb'
                    ) );
                }
            }
        }
        groups_update_groupmeta( $bp->groups->current_group->id, 'blogfeeds', $blog_feeds );
        groups_update_groupmeta( $bp->groups->current_group->id, 'bp_groupblogs_lastupdate', gmdate( "Y-m-d H:i:s" ) );
        /* Re-fetch */
        bp_groupblogs_fetch_group_feeds( $bp->groups->current_group->id );
        bp_core_add_message( __( 'External blog feeds updated successfully!', 'bp-groups-externalblogs' ) );
        bp_core_redirect( bp_get_group_permalink( $bp->groups->current_group ) . '/admin/' . $this->slug );
    }
    /* We don't need display functions since the group activity stream handles it all. */
    function display() {}
    function widget_display() {}
}

bp_register_group_extension( 'Group_External_Blogs' );

function bp_groupblogs_fetch_group_feeds( $group_id = false ) {
    global $bp;
    include_once( ABSPATH . 'wp-includes/rss.php' );
    if ( empty( $group_id ) )
        $group_id = $bp->groups->current_group->id;
    if ( $group_id == $bp->groups->current_group->id )
        $group = $bp->groups->current_group;
    else
        $group = new BP_Groups_Group( $group_id );
    if ( !$group )
        return false;
    $group_blogs = groups_get_groupmeta( $group_id, 'blogfeeds' );
    $group_blogs = explode(";",$group_blogs[0]);

    /* Set the visibility */
    $hide_sitewide = ( 'public' != $group->status ) ? true : false;
    foreach ( (array) $group_blogs as $feed_url ) {
        $rss = fetch_feed( trim( $feed_url ) );
        if (!is_wp_error($rss) ) {
            foreach ( $rss->get_items(0,10) as $item ) {;
                $key = $item->get_date( 'U' );
                $items[$key]['title'] = $item->get_title();
                $items[$key]['subtitle'] = $item->get_title();
                //$items[$key]['author'] = $item->get_author()->get_name();
                $items[$key]['blogname'] = $item->get_feed()->get_title();
                $items[$key]['link'] = $item->get_permalink();
                $items[$key]['blogurl'] = $item->get_feed()->get_link();
                $items[$key]['description'] = $item->get_description();
                $items[$key]['source'] = $item->get_source();
                $items[$key]['copyright'] = $item->get_copyright();
            }
        }
    }
    if ( $items ) {
        ksort($items);
        $items = array_reverse($items, true);
    } else {
        return false;
    }
    /* Record found blog posts in activity streams */
    foreach ( (array) $items as $post_date => $post ) {
        //var_dump($post);
        if (substr($post['blogname'],0,7) == "Twitter") {
            $activity_action = sprintf( __( '%s from %s in the group %s', 'bp-groups-externalblogs' ), '<a class="feed-link" href="' . esc_attr( $post['link'] ) . '">Tweet</a>', '<a class="feed-author" href="' . esc_attr( $post['blogurl'] ) . '">' . attribute_escape( $post['blogname'] ) . '</a>', '<a href="' . bp_get_group_permalink( $group ) . '">' . attribute_escape( $group->name ) . '</a>' );
        } else {
            $activity_action = sprintf( __( 'Blog: %s from %s in the group %s', 'bp-groups-externalblogs' ), '<a class="feed-link" href="' . esc_attr( $post['link'] ) . '">' . esc_attr( $post['title'] ) . '</a>', '<a class="feed-author" href="' . esc_attr( $post['blogurl'] ) . '">' . attribute_escape( $post['blogname'] ) . '</a>', '<a href="' . bp_get_group_permalink( $group ) . '">' . attribute_escape( $group->name ) . '</a>' );
        }

        $activity_content = '<div>' . strip_tags( bp_create_excerpt( $post['description'], 175 ) ) . '</div>';
        $activity_content = apply_filters( 'bp_groupblogs_activity_content', $activity_content, $post, $group );
        /* Fetch an existing activity_id if one exists. */
        if ( function_exists( 'bp_activity_get_activity_id' ) )
            $id = bp_activity_get_activity_id( array( 'user_id' => false, 'action' => $activity_action, 'component' => $bp->groups->id, 'type' => 'exb', 'item_id' => $group_id, 'secondary_item_id' => wp_hash( $post['blogurl'] ) ) );
        /* Record or update in activity streams. */
        groups_record_activity( array(
            'id' => $id,
            'user_id' => false,
            'action' => $activity_action,
            'content' => $activity_content,
            'primary_link' => $item->get_link(),
            'type' => 'exb',
            'item_id' => $group_id,
            'secondary_item_id' => wp_hash( $post['blogurl'] ),
            'recorded_time' => gmdate( "Y-m-d H:i:s", $post_date ),
            'hide_sitewide' => $hide_sitewide
        ) );
    }
    return $items;
}

/* Add a filter option to the filter select box on group activity pages */
function bp_groupblogs_add_filter() { ?>
    <option value="exb"><?php _e( 'External Blogs', 'bp-groups-externalblogs' ) ?></option><?php
}
add_action( 'bp_group_activity_filter_options', 'bp_groupblogs_add_filter' );
add_action( 'bp_activity_filter_options', 'bp_groupblogs_add_filter' );

/* Add a filter option groups avatar */
/* Fetch group twitter posts after 30 mins expires and someone hits the group page */
function bp_groupblogs_refetch() {
    global $bp;
    $last_refetch = groups_get_groupmeta( $bp->groups->current_group->id, 'bp_groupblogs_lastupdate' );
    if ( strtotime( gmdate( "Y-m-d H:i:s" ) ) >= strtotime( '+30 minutes', strtotime( $last_refetch ) ) )
        add_action( 'wp_footer', 'bp_groupblogs_refetch' );
    /* Refetch the latest group twitter posts via AJAX so we don't stall a page load. */
    function _bp_groupblogs_refetch() {
        global $bp; ?>
        <script type="text/javascript">
            jQuery(document).ready( function() {
                jQuery.post( ajaxurl, {
                    action: 'refetch_groupblogs',
                    'cookie': encodeURIComponent(document.cookie),
                    'group_id': <?php echo $bp->groups->current_group->id ?>
                });
            });
        </script><?php
        groups_update_groupmeta( $bp->groups->current_group->id, 'bp_groupblogs_lastupdate', gmdate( "Y-m-d H:i:s" ) );
    }
}
add_action( 'groups_screen_group_home', 'bp_groupblogs_refetch' );

/* Refresh via an AJAX post for the group */
function bp_groupblogs_ajax_refresh() {
    bp_groupblogs_fetch_group_feeds( $_POST['group_id'] );
}
add_action( 'wp_ajax_refetch_groupblogs', 'bp_groupblogs_ajax_refresh' );

function bp_groupblogs_cron_refresh() {
    global $bp, $wpdb;
    $group_ids = $wpdb->get_col( $wpdb->prepare( "SELECT group_id FROM " . $bp->groups->table_name_groupmeta . " WHERE meta_key = 'blogfeeds'" ) );
    foreach( $group_ids as $group_id )
        bp_groupblogs_fetch_group_feeds( $group_id );
}
add_action( 'bp_groupblogs_cron', 'bp_groupblogs_cron_refresh' );
}

// Add a filter option groups avatar
function bp_groupblogs_avatar_type($var) {
global $activities_template, $bp;

if ( $activities_template->activity->type == "exb" ) {
    return 'group';
} else {
    return $var;
}
}
add_action( 'bp_get_activity_avatar_object_groups', 'bp_groupblogs_avatar_type');
add_action( 'bp_get_activity_avatar_object_activity', 'bp_groupblogs_avatar_type');

function bp_groupblogs_avatar_id($var) {
global $activities_template, $bp;

if ( $activities_template->activity->type == "exb" ) {
    return $activities_template->activity->item_id;
}

return $var;

}
add_action( 'bp_get_activity_avatar_item_id', 'bp_groupblogs_avatar_id');

?>

我有一个关于停止在事件流中重复数据的建议。也许每天使用 wp-cron api 和当前日期 xml 提要获取系统。因此它不会在小组事件流中重复相同的提要。我们需要一个标准来停止 bp 组事件流中的数据重复。这是我项目的一部分。是否有另一种获取提要并将其保存到 mysql 表(在组事件流中)然后将其显示为最新组更新的方法？

Answer 1

实际上它是自动获取的。我在插件中看到了 cron 用法。 WordPress Cron 仅在任何用户打开您的站点时触发。所以没有用户(没有页面浏览量)——没有 cron 事件。在每次浏览网页时，WP-Cron 检查是否到了触发任何功能的时间。

也许 this plugin会对您有所帮助 - 在单独的组选项卡中显示 RSS 提要。