| 1 | <?php
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| 2 | # class SyndicatedLink: represents a syndication feed stored within the
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| 3 | # WordPress database
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| 4 | #
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| 5 | # To keep things compact and editable from within WordPress, we use all the
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| 6 | # links under a particular category in the WordPress "Blogroll" for the list of
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| 7 | # feeds to syndicate. "Contributors" is the category used by default; you can
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| 8 | # configure that under Options --> Syndication.
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| 9 | #
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| 10 | # Fields used are:
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| 11 | #
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| 12 | # * link_rss: the URI of the Atom/RSS feed to syndicate
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| 13 | #
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| 14 | # * link_notes: user-configurable options, with keys and values
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| 15 | # like so:
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| 16 | #
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| 17 | # key: value
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| 18 | # cats: computers\nweb
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| 19 | # feed/key: value
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| 20 | #
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| 21 | # Keys that start with "feed/" are gleaned from the data supplied
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| 22 | # by the feed itself, and will be overwritten with each update.
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| 23 | #
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| 24 | # Values have linebreak characters escaped with C-style
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| 25 | # backslashes (so, for example, a newline becomes "\n").
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| 26 | #
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| 27 | # The value of `cats` is used as a newline-separated list of
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| 28 | # default categories for any post coming from a particular feed.
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| 29 | # (In the example above, any posts from this feed will be placed
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| 30 | # in the "computers" and "web" categories--*in addition to* any
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| 31 | # categories that may already be applied to the posts.)
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| 32 | #
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| 33 | # Values of keys in link_notes are accessible from templates using
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| 34 | # the function `get_feed_meta($key)` if this plugin is activated.
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| 35 |
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| 36 | class SyndicatedLink {
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| 37 | var $id = null;
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| 38 | var $link = null;
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| 39 | var $settings = array ();
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| 40 | var $magpie = null;
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| 41 |
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| 42 | function SyndicatedLink ($link) {
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| 43 | global $wpdb;
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| 44 |
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| 45 | if (is_object($link)) :
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| 46 | $this->link = $link;
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| 47 | $this->id = $link->link_id;
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| 48 | else :
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| 49 | $this->id = $link;
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| 50 | if (function_exists('get_bookmark')) : // WP 2.1+
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| 51 | $this->link = get_bookmark($link);
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| 52 | else :
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| 53 | $this->link = $wpdb->get_row("
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| 54 | SELECT * FROM $wpdb->links
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| 55 | WHERE (link_id = '".$wpdb->escape($link)."')"
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| 56 | );
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| 57 | endif;
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| 58 | endif;
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| 59 |
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| 60 | if (strlen($this->link->link_rss) > 0) :
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| 61 | // Read off feed settings from link_notes
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| 62 | $notes = explode("\n", $this->link->link_notes);
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| 63 | foreach ($notes as $note):
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| 64 | $pair = explode(": ", $note, 2);
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| 65 | $key = (isset($pair[0]) ? $pair[0] : null);
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| 66 | $value = (isset($pair[1]) ? $pair[1] : null);
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| 67 | if (!is_null($key) and !is_null($value)) :
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| 68 | // Unescape and trim() off the whitespace.
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| 69 | // Thanks to Ray Lischner for pointing out the
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| 70 | // need to trim off whitespace.
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| 71 | $this->settings[$key] = stripcslashes (trim($value));
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| 72 | endif;
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| 73 | endforeach;
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| 74 |
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| 75 | // "Magic" feed settings
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| 76 | $this->settings['link/uri'] = $this->link->link_rss;
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| 77 | $this->settings['link/name'] = $this->link->link_name;
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| 78 | $this->settings['link/id'] = $this->link->link_id;
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| 79 |
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| 80 | // `hardcode categories` and `unfamiliar categories` are deprecated in favor of `unfamiliar category`
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| 81 | if (
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| 82 | isset($this->settings['unfamiliar categories'])
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| 83 | and !isset($this->settings['unfamiliar category'])
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| 84 | ) :
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| 85 | $this->settings['unfamiliar category'] = $this->settings['unfamiliar categories'];
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| 86 | endif;
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| 87 | if (
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| 88 | FeedWordPress::affirmative($this->settings, 'hardcode categories')
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| 89 | and !isset($this->settings['unfamiliar category'])
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| 90 | ) :
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| 91 | $this->settings['unfamiliar category'] = 'default';
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| 92 | endif;
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| 93 |
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| 94 | // Set this up automagically for del.icio.us
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| 95 | $bits = parse_url($this->link->link_rss);
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| 96 | $tagspacers = array('del.icio.us', 'feeds.delicious.com');
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| 97 | if (!isset($this->settings['cat_split']) and in_array($bits['host'], $tagspacers)) :
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| 98 | $this->settings['cat_split'] = '\s'; // Whitespace separates multiple tags in del.icio.us RSS feeds
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| 99 | endif;
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| 100 |
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| 101 | if (isset($this->settings['cats'])):
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| 102 | $this->settings['cats'] = preg_split(FEEDWORDPRESS_CAT_SEPARATOR_PATTERN, $this->settings['cats']);
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| 103 | endif;
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| 104 | if (isset($this->settings['tags'])):
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| 105 | $this->settings['tags'] = preg_split(FEEDWORDPRESS_CAT_SEPARATOR_PATTERN, $this->settings['tags']);
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| 106 | endif;
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| 107 |
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| 108 | if (isset($this->settings['map authors'])) :
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| 109 | $author_rules = explode("\n\n", $this->settings['map authors']);
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| 110 | $ma = array();
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| 111 | foreach ($author_rules as $rule) :
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| 112 | list($rule_type, $author_name, $author_action) = explode("\n", $rule);
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| 113 |
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| 114 | // Normalize for case and whitespace
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| 115 | $rule_type = strtolower(trim($rule_type));
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| 116 | $author_name = strtolower(trim($author_name));
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| 117 | $author_action = strtolower(trim($author_action));
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| 118 |
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| 119 | $ma[$rule_type][$author_name] = $author_action;
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| 120 | endforeach;
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| 121 | $this->settings['map authors'] = $ma;
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| 122 | endif;
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| 123 | endif;
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| 124 | } /* SyndicatedLink::SyndicatedLink () */
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| 125 |
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| 126 | function found () {
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| 127 | return is_object($this->link);
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| 128 | } /* SyndicatedLink::found () */
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| 129 |
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| 130 | function stale () {
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| 131 | $stale = true;
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| 132 | if (isset($this->settings['update/hold']) and ($this->settings['update/hold']=='ping')) :
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| 133 | $stale = false; // don't update on any timed updates; pings only
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| 134 | elseif (isset($this->settings['update/hold']) and ($this->settings['update/hold']=='next')) :
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| 135 | $stale = true; // update on the next timed update
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| 136 | elseif (!isset($this->settings['update/ttl']) or !isset($this->settings['update/last'])) :
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| 137 | $stale = true; // initial update
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| 138 | else :
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| 139 | $after = ((int) $this->settings['update/last'])
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| 140 | +((int) $this->settings['update/ttl'] * 60);
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| 141 | $stale = (time() >= $after);
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| 142 | endif;
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| 143 | return $stale;
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| 144 | } /* SyndicatedLink::stale () */
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| 145 |
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| 146 | function poll ($crash_ts = NULL) {
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| 147 | global $wpdb;
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| 148 |
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| 149 | $this->magpie = fetch_rss($this->link->link_rss);
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| 150 | $new_count = NULL;
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| 151 |
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| 152 | $resume = FeedWordPress::affirmative($this->settings, 'update/unfinished');
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| 153 | if ($resume) :
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| 154 | // pick up where we left off
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| 155 | $processed = array_map('trim', explode("\n", $this->settings['update/processed']));
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| 156 | else :
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| 157 | // begin at the beginning
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| 158 | $processed = array();
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| 159 | endif;
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| 160 |
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| 161 | if (is_object($this->magpie)) :
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| 162 | $new_count = array('new' => 0, 'updated' => 0);
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| 163 |
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| 164 | # -- Update Link metadata live from feed
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| 165 | $channel = $this->magpie->channel;
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| 166 |
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| 167 | if (!isset($channel['id'])) :
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| 168 | $channel['id'] = $this->link->link_rss;
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| 169 | endif;
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| 170 |
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| 171 | $update = array();
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| 172 | if (!$this->hardcode('url') and isset($channel['link'])) :
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| 173 | $update[] = "link_url = '".$wpdb->escape($channel['link'])."'";
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| 174 | endif;
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| 175 |
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| 176 | if (!$this->hardcode('name') and isset($channel['title'])) :
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| 177 | $update[] = "link_name = '".$wpdb->escape($channel['title'])."'";
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| 178 | endif;
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| 179 |
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| 180 | if (!$this->hardcode('description')) :
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| 181 | if (isset($channel['tagline'])) :
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| 182 | $update[] = "link_description = '".$wpdb->escape($channel['tagline'])."'";
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| 183 | elseif (isset($channel['description'])) :
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| 184 | $update[] = "link_description = '".$wpdb->escape($channel['description'])."'";
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| 185 | endif;
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| 186 | endif;
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| 187 |
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| 188 | $this->settings = array_merge($this->settings, $this->flatten_array($channel));
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| 189 |
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| 190 | $this->settings['update/last'] = time(); $ttl = $this->ttl();
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| 191 | if (!is_null($ttl)) :
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| 192 | $this->settings['update/ttl'] = $ttl;
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| 193 | $this->settings['update/timed'] = 'feed';
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| 194 | else :
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| 195 | $this->settings['update/ttl'] = rand(30, 120); // spread over time interval for staggered updates
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| 196 | $this->settings['update/timed'] = 'automatically';
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| 197 | endif;
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| 198 |
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| 199 | if (!isset($this->settings['update/hold']) or $this->settings['update/hold']!='ping') :
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| 200 | $this->settings['update/hold'] = 'scheduled';
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| 201 | endif;
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| 202 |
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| 203 | $this->settings['update/unfinished'] = 'yes';
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| 204 |
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| 205 | $update[] = "link_notes = '".$wpdb->escape($this->settings_to_notes())."'";
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| 206 |
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| 207 | $update_set = implode(',', $update);
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| 208 |
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| 209 | // Update the properties of the link from the feed information
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| 210 | $result = $wpdb->query("
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| 211 | UPDATE $wpdb->links
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| 212 | SET $update_set
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| 213 | WHERE link_id='$this->id'
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| 214 | ");
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| 215 |
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| 216 | # -- Add new posts from feed and update any updated posts
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| 217 | $crashed = false;
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| 218 |
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| 219 | if (is_array($this->magpie->items)) :
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| 220 | foreach ($this->magpie->items as $item) :
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| 221 | $post =& new SyndicatedPost($item, $this);
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| 222 | if (!$resume or !in_array(trim($post->guid()), $processed)) :
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| 223 | $processed[] = $post->guid();
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| 224 | if (!$post->filtered()) :
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| 225 | $new = $post->store();
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| 226 | if ( $new !== false ) $new_count[$new]++;
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| 227 | endif;
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| 228 |
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| 229 | if (!is_null($crash_ts) and (time() > $crash_ts)) :
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| 230 | $crashed = true;
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| 231 | break;
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| 232 | endif;
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| 233 | endif;
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| 234 | endforeach;
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| 235 | endif;
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| 236 |
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| 237 | // Copy back any changes to feed settings made in the course of updating (e.g. new author rules)
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| 238 | $to_notes = $this->settings;
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| 239 |
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| 240 | $this->settings['update/processed'] = $processed;
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| 241 | if (!$crashed) :
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| 242 | $this->settings['update/unfinished'] = 'no';
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| 243 | endif;
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| 244 |
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| 245 | $update_set = "link_notes = '".$wpdb->escape($this->settings_to_notes())."'";
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| 246 |
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| 247 | // Update the properties of the link from the feed information
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| 248 | $result = $wpdb->query("
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| 249 | UPDATE $wpdb->links
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| 250 | SET $update_set
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| 251 | WHERE link_id='$this->id'
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| 252 | ");
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| 253 | endif;
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| 254 |
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| 255 | return $new_count;
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| 256 | } /* SyndicatedLink::poll() */
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| 257 |
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| 258 | function map_name_to_new_user ($name, $newuser_name) {
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| 259 | global $wpdb;
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| 260 |
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| 261 | if (strlen($newuser_name) > 0) :
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| 262 | $userdata = array();
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| 263 | $userdata['ID'] = NULL;
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| 264 |
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| 265 | $userdata['user_login'] = sanitize_user($newuser_name);
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| 266 | $userdata['user_login'] = apply_filters('pre_user_login', $userdata['user_login']);
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| 267 |
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| 268 | $userdata['user_nicename'] = sanitize_title($newuser_name);
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| 269 | $userdata['user_nicename'] = apply_filters('pre_user_nicename', $userdata['user_nicename']);
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| 270 |
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| 271 | $userdata['display_name'] = $wpdb->escape($newuser_name);
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| 272 |
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| 273 | $newuser_id = wp_insert_user($userdata);
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| 274 | if (is_numeric($newuser_id)) :
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| 275 | if (is_null($name)) : // Unfamiliar author
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| 276 | $this->settings['unfamiliar author'] = $newuser_id;
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| 277 | else :
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| 278 | $this->settings['map authors']['name'][$name] = $newuser_id;
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| 279 | endif;
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| 280 | else :
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| 281 | // TODO: Add some error detection and reporting
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| 282 | endif;
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| 283 | else :
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| 284 | // TODO: Add some error reporting
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| 285 | endif;
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| 286 | } /* SyndicatedLink::map_name_to_new_user () */
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| 287 |
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| 288 | function settings_to_notes () {
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| 289 | $to_notes = $this->settings;
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| 290 |
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| 291 | unset($to_notes['link/id']); // Magic setting; don't save
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| 292 | unset($to_notes['link/uri']); // Magic setting; don't save
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| 293 | unset($to_notes['link/name']); // Magic setting; don't save
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| 294 | unset($to_notes['hardcode categories']); // Deprecated
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| 295 | unset($to_notes['unfamiliar categories']); // Deprecated
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| 296 |
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| 297 | // Collapse array settings
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| 298 | if (isset($to_notes['update/processed']) and (is_array($to_notes['update/processed']))) :
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| 299 | $to_notes['update/processed'] = implode("\n", $to_notes['update/processed']);
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| 300 | endif;
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| 301 |
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| 302 | if (isset($to_notes['cats']) and is_array($to_notes['cats'])) :
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| 303 | $to_notes['cats'] = implode(FEEDWORDPRESS_CAT_SEPARATOR, $to_notes['cats']);
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| 304 | endif;
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| 305 | if (isset($to_notes['tags']) and is_array($to_notes['tags'])) :
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| 306 | $to_notes['tags'] = implode(FEEDWORDPRESS_CAT_SEPARATOR, $to_notes['tags']);
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| 307 | endif;
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| 308 |
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| 309 | // Collapse the author mapping rule structure back into a flat string
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| 310 | if (isset($to_notes['map authors'])) :
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| 311 | $ma = array();
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| 312 | foreach ($to_notes['map authors'] as $rule_type => $author_rules) :
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| 313 | foreach ($author_rules as $author_name => $author_action) :
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| 314 | $ma[] = $rule_type."\n".$author_name."\n".$author_action;
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| 315 | endforeach;
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| 316 | endforeach;
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| 317 | $to_notes['map authors'] = implode("\n\n", $ma);
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| 318 | endif;
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| 319 |
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| 320 | $notes = '';
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| 321 | foreach ($to_notes as $key => $value) :
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| 322 | $notes .= $key . ": ". addcslashes($value, "\0..\37".'\\') . "\n";
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| 323 | endforeach;
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| 324 | return $notes;
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| 325 | } /* SyndicatedLink::settings_to_notes () */
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| 326 |
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| 327 | function uri () {
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| 328 | return (is_object($this->link) ? $this->link->link_rss : NULL);
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| 329 | } /* SyndicatedLink::uri () */
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| 330 |
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| 331 | function homepage () {
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| 332 | return (isset($this->settings['feed/link']) ? $this->settings['feed/link'] : NULL);
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| 333 | } /* SyndicatedLink::homepage () */
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| 334 |
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| 335 | function ttl () {
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| 336 | if (is_object($this->magpie)) :
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| 337 | $channel = $this->magpie->channel;
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| 338 | else :
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| 339 | $channel = array();
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| 340 | endif;
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| 341 |
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| 342 | if (isset($channel['ttl'])) :
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| 343 | // "ttl stands for time to live. It's a number of
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| 344 | // minutes that indicates how long a channel can be
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| 345 | // cached before refreshing from the source."
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| 346 | // <http://blogs.law.harvard.edu/tech/rss#ltttlgtSubelementOfLtchannelgt>
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| 347 | $ret = $channel['ttl'];
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| 348 | elseif (isset($channel['sy']['updatefrequency']) or isset($channel['sy']['updateperiod'])) :
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| 349 | $period_minutes = array (
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| 350 | 'hourly' => 60, /* minutes in an hour */
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| 351 | 'daily' => 1440, /* minutes in a day */
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| 352 | 'weekly' => 10080, /* minutes in a week */
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| 353 | 'monthly' => 43200, /* minutes in a month */
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| 354 | 'yearly' => 525600, /* minutes in a year */
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| 355 | );
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| 356 |
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| 357 | // "sy:updatePeriod: Describes the period over which the
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| 358 | // channel format is updated. Acceptable values are:
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| 359 | // hourly, daily, weekly, monthly, yearly. If omitted,
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| 360 | // daily is assumed." <http://web.resource.org/rss/1.0/modules/syndication/>
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| 361 | if (isset($channel['sy']['updateperiod'])) : $period = $channel['sy']['updateperiod'];
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| 362 | else : $period = 'daily';
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| 363 | endif;
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| 364 |
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| 365 | // "sy:updateFrequency: Used to describe the frequency
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| 366 | // of updates in relation to the update period. A
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| 367 | // positive integer indicates how many times in that
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| 368 | // period the channel is updated. ... If omitted a value
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| 369 | // of 1 is assumed." <http://web.resource.org/rss/1.0/modules/syndication/>
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| 370 | if (isset($channel['sy']['updatefrequency'])) : $freq = (int) $channel['sy']['updatefrequency'];
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| 371 | else : $freq = 1;
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| 372 | endif;
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| 373 |
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| 374 | $ret = (int) ($period_minutes[$period] / $freq);
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| 375 | else :
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| 376 | $ret = NULL;
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| 377 | endif;
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| 378 | return $ret;
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| 379 | } /* SyndicatedLink::ttl() */
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| 380 |
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| 381 | // SyndicatedLink::flatten_array (): flatten an array. Useful for
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| 382 | // hierarchical and namespaced elements.
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| 383 | //
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| 384 | // Given an array which may contain array or object elements in it,
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| 385 | // return a "flattened" array: a one-dimensional array of scalars
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| 386 | // containing each of the scalar elements contained within the array
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| 387 | // structure. Thus, for example, if $a['b']['c']['d'] == 'e', then the
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| 388 | // returned array for FeedWordPress::flatten_array($a) will contain a key
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| 389 | // $a['feed/b/c/d'] with value 'e'.
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| 390 | function flatten_array ($arr, $prefix = 'feed/', $separator = '/') {
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| 391 | $ret = array ();
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| 392 | if (is_array($arr)) :
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| 393 | foreach ($arr as $key => $value) :
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| 394 | if (is_scalar($value)) :
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| 395 | $ret[$prefix.$key] = $value;
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| 396 | else :
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| 397 | $ret = array_merge($ret, $this->flatten_array($value, $prefix.$key.$separator, $separator));
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| 398 | endif;
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| 399 | endforeach;
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| 400 | endif;
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| 401 | return $ret;
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| 402 | } /* SyndicatedLink::flatten_array () */
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| 403 |
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| 404 | function hardcode ($what) {
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| 405 | $default = get_option("feedwordpress_hardcode_$what");
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| 406 | if ( $default === 'yes' ) :
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| 407 | // If the default is to hardcode, then we want the
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| 408 | // negation of negative(): TRUE by default and FALSE if
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| 409 | // the setting is explicitly "no"
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| 410 | $ret = !FeedWordPress::negative($this->settings, "hardcode $what");
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| 411 | else :
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| 412 | // If the default is NOT to hardcode, then we want
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| 413 | // affirmative(): FALSE by default and TRUE if the
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| 414 | // setting is explicitly "yes"
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| 415 | $ret = FeedWordPress::affirmative($this->settings, "hardcode $what");
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| 416 | endif;
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| 417 | return $ret;
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| 418 | } /* SyndicatedLink::hardcode () */
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| 419 |
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| 420 | function syndicated_status ($what, $default) {
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| 421 | global $wpdb;
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| 422 |
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| 423 | $ret = get_option("feedwordpress_syndicated_{$what}_status");
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| 424 | if ( isset($this->settings["$what status"]) ) :
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| 425 | $ret = $this->settings["$what status"];
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| 426 | elseif (!$ret) :
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| 427 | $ret = $default;
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| 428 | endif;
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| 429 | return $wpdb->escape(trim(strtolower($ret)));
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| 430 | } /* SyndicatedLink:syndicated_status () */
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| 431 | } // class SyndicatedLink
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| 432 |
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