tt-rss/classes/ccache.php

<?php
class CCache {
	/* function ccache_zero($feed_id, $owner_uid) {
		db_query("UPDATE ttrss_counters_cache SET
			value = 0, updated = NOW() WHERE
			feed_id = '$feed_id' AND owner_uid = '$owner_uid'");
	} */

	static function zero_all($owner_uid) {
		db_query("UPDATE ttrss_counters_cache SET
			value = 0 WHERE owner_uid = '$owner_uid'");

		db_query("UPDATE ttrss_cat_counters_cache SET
			value = 0 WHERE owner_uid = '$owner_uid'");
	}

	static function remove($feed_id, $owner_uid, $is_cat = false) {

		if (!$is_cat) {
			$table = "ttrss_counters_cache";
		} else {
			$table = "ttrss_cat_counters_cache";
		}

		db_query("DELETE FROM $table WHERE
			feed_id = '$feed_id' AND owner_uid = '$owner_uid'");

	}

	static function update_all($owner_uid) {

		if (get_pref('ENABLE_FEED_CATS', $owner_uid)) {

			$result = db_query("SELECT feed_id FROM ttrss_cat_counters_cache
				WHERE feed_id > 0 AND owner_uid = '$owner_uid'");

			while ($line = db_fetch_assoc($result)) {
				CCache::update($line["feed_id"], $owner_uid, true);
			}

			/* We have to manually include category 0 */

			CCache::update(0, $owner_uid, true);

		} else {
			$result = db_query("SELECT feed_id FROM ttrss_counters_cache
				WHERE feed_id > 0 AND owner_uid = '$owner_uid'");

			while ($line = db_fetch_assoc($result)) {
				print CCache::update($line["feed_id"], $owner_uid);

			}

		}
	}

	static function find($feed_id, $owner_uid, $is_cat = false,
						 $no_update = false) {

		if (!is_numeric($feed_id)) return;

		if (!$is_cat) {
			$table = "ttrss_counters_cache";
			/* if ($feed_id > 0) {
				$tmp_result = db_query("SELECT owner_uid FROM ttrss_feeds
					WHERE id = '$feed_id'");
				$owner_uid = db_fetch_result($tmp_result, 0, "owner_uid");
			} */
		} else {
			$table = "ttrss_cat_counters_cache";
		}

		if (DB_TYPE == "pgsql") {
			$date_qpart = "updated > NOW() - INTERVAL '15 minutes'";
		} else if (DB_TYPE == "mysql") {
			$date_qpart = "updated > DATE_SUB(NOW(), INTERVAL 15 MINUTE)";
		}

		$result = db_query("SELECT value FROM $table
			WHERE owner_uid = '$owner_uid' AND feed_id = '$feed_id'
			LIMIT 1");

		if (db_num_rows($result) == 1) {
			return db_fetch_result($result, 0, "value");
		} else {
			if ($no_update) {
				return -1;
			} else {
				return CCache::update($feed_id, $owner_uid, $is_cat);
			}
		}

	}

	static function update($feed_id, $owner_uid, $is_cat = false,
						   $update_pcat = true, $pcat_fast = false) {

		if (!is_numeric($feed_id)) return;

		/* if (!$is_cat && $feed_id > 0) {
			$tmp_result = db_query("SELECT owner_uid FROM ttrss_feeds
				WHERE id = '$feed_id'");
			$owner_uid = db_fetch_result($tmp_result, 0, "owner_uid");
		} */

		$prev_unread = CCache::find($feed_id, $owner_uid, $is_cat, true);

		/* When updating a label, all we need to do is recalculate feed counters
		 * because labels are not cached */

		if ($feed_id < 0) {
			CCache::update_all($owner_uid);
			return;
		}

		if (!$is_cat) {
			$table = "ttrss_counters_cache";
		} else {
			$table = "ttrss_cat_counters_cache";
		}

		if ($is_cat && $feed_id >= 0) {
			if ($feed_id != 0) {
				$cat_qpart = "cat_id = '$feed_id'";
			} else {
				$cat_qpart = "cat_id IS NULL";
			}

			/* Recalculate counters for child feeds */

			if (!$pcat_fast) {
				$result = db_query("SELECT id FROM ttrss_feeds
						WHERE owner_uid = '$owner_uid' AND $cat_qpart");

				while ($line = db_fetch_assoc($result)) {
					CCache::update($line["id"], $owner_uid, false, false);
				}
			}

			$result = db_query("SELECT SUM(value) AS sv
				FROM ttrss_counters_cache, ttrss_feeds
				WHERE id = feed_id AND $cat_qpart AND
				ttrss_counters_cache.owner_uid = $owner_uid AND
				ttrss_feeds.owner_uid = '$owner_uid'");

			$unread = (int) db_fetch_result($result, 0, "sv");

		} else {
			$unread = (int) Feeds::getFeedArticles($feed_id, $is_cat, true, $owner_uid);
		}

		db_query("BEGIN");

		$result = db_query("SELECT feed_id FROM $table
			WHERE owner_uid = '$owner_uid' AND feed_id = '$feed_id' LIMIT 1");

		if (db_num_rows($result) == 1) {
			db_query("UPDATE $table SET
				value = '$unread', updated = NOW() WHERE
				feed_id = '$feed_id' AND owner_uid = '$owner_uid'");

		} else {
			db_query("INSERT INTO $table
				(feed_id, value, owner_uid, updated)
				VALUES
				($feed_id, $unread, $owner_uid, NOW())");
		}

		db_query("COMMIT");

		if ($feed_id > 0 && $prev_unread != $unread) {

			if (!$is_cat) {

				/* Update parent category */

				if ($update_pcat) {

					$result = db_query("SELECT cat_id FROM ttrss_feeds
						WHERE owner_uid = '$owner_uid' AND id = '$feed_id'");

					$cat_id = (int) db_fetch_result($result, 0, "cat_id");

					CCache::update($cat_id, $owner_uid, true, true, true);

				}
			}
		} else if ($feed_id < 0) {
			CCache::update_all($owner_uid);
		}

		return $unread;
	}

	/* function ccache_cleanup($owner_uid) {

		if (DB_TYPE == "pgsql") {
			db_query("DELETE FROM ttrss_counters_cache AS c1 WHERE
				(SELECT count(*) FROM ttrss_counters_cache AS c2
					WHERE c1.feed_id = c2.feed_id AND c2.owner_uid = c1.owner_uid) > 1
					AND owner_uid = '$owner_uid'");

			db_query("DELETE FROM ttrss_cat_counters_cache AS c1 WHERE
				(SELECT count(*) FROM ttrss_cat_counters_cache AS c2
					WHERE c1.feed_id = c2.feed_id AND c2.owner_uid = c1.owner_uid) > 1
					AND owner_uid = '$owner_uid'");
		} else {
			db_query("DELETE c1 FROM
					ttrss_counters_cache AS c1,
					ttrss_counters_cache AS c2
				WHERE
					c1.owner_uid = '$owner_uid' AND
					c1.owner_uid = c2.owner_uid AND
					c1.feed_id = c2.feed_id");

			db_query("DELETE c1 FROM
					ttrss_cat_counters_cache AS c1,
					ttrss_cat_counters_cache AS c2
				WHERE
					c1.owner_uid = '$owner_uid' AND
					c1.owner_uid = c2.owner_uid AND
					c1.feed_id = c2.feed_id");

		}
	} */


}