Alpha 5 #20
|
@ -42,4 +42,12 @@ Data is stored under the `/src/data` directory, and the default database name is
|
|||
|
||||
### Date/Time Format
|
||||
|
||||
The default format for dates and times look like "May 28, 2023 at 3:15pm". Changing the string there will alter the display on the main page and when reading an item. Any [supported PHP date or time token](https://www.php.net/manual/en/datetime.format.php) is supported.
|
||||
The default format for dates and times look like "May 28, 2023 at 3:15pm". Changing the string there will alter the display on the main page and when reading an item. Any [supported PHP date or time token](https://www.php.net/manual/en/datetime.format.php) is supported.
|
||||
|
||||
### Item Purging
|
||||
|
||||
Feed Reader Central tries to keep the database tidy by purging items that have been read and are no longer required. There are three variants:
|
||||
- `Feed::PURGE_READ` purges non-bookmarked read items for a feed whenever it is refreshed. This is the most aggressive purging strategy, but it is also the only one that will not purge unread items.
|
||||
- `Feed::PURGE_BY_DAYS` purges non-bookmarked items that are older than `PURGE_NUMBER` days old. This is the default value, and `PURGE_NUMBER`'s default value is 30; items will be kept for 30 days, read or unread.
|
||||
- `Feed::PURGE_BY_COUNT` purges items to preserve at most `PURGE_NUMBER` non-bookmarked items for each feed.
|
||||
|
|
@ -98,4 +98,14 @@ class Data {
|
|||
if (is_null($dbConn)) $db->close();
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Return the last SQLite error message as a result array
|
||||
*
|
||||
* @param SQLite3 $db The database connection on which the error has occurred
|
||||
* @return string[] ['error' => message] for last SQLite error message
|
||||
*/
|
||||
public static function error(SQLite3 $db): array {
|
||||
return ['error' => 'SQLite error: ' . $db->lastErrorMsg()];
|
||||
}
|
||||
}
|
||||
|
|
140
src/lib/Feed.php
140
src/lib/Feed.php
|
@ -30,6 +30,15 @@ class Feed {
|
|||
private const string USER_AGENT =
|
||||
'FeedReaderCentral/' . FRC_VERSION . ' +https://bitbadger.solutions/open-source/feed-reader-central';
|
||||
|
||||
/** @var int Purge all read items (will not purge unread items) */
|
||||
public const int PURGE_READ = 1;
|
||||
|
||||
/** @var int Purge items older than the specified number of days */
|
||||
public const int PURGE_BY_DAYS = 2;
|
||||
|
||||
/** @var int Purge items in number greater than the specified number of items to keep */
|
||||
public const int PURGE_BY_COUNT = 3;
|
||||
|
||||
/**
|
||||
* When parsing XML into a DOMDocument, errors are presented as warnings; this creates an exception for them
|
||||
*
|
||||
|
@ -86,15 +95,16 @@ class Feed {
|
|||
private static function fromRSS(DOMDocument $xml, string $url): array {
|
||||
$channel = $xml->getElementsByTagName('channel')->item(0);
|
||||
if (!($channel instanceof DOMElement)) {
|
||||
return ['error' => "Channel element not found ($channel->nodeType)"];
|
||||
$type = $channel?->nodeType ?? -1;
|
||||
return ['error' => "Channel element not found ($type)"];
|
||||
}
|
||||
|
||||
// The Atom namespace provides a lastBuildDate, which contains the last time an item in the feed was updated; if
|
||||
// that is not present, use the pubDate element instead
|
||||
$updatedOn = self::rssValue($channel, 'lastBuildDate');
|
||||
if ($updatedOn == 'lastBuildDate not found') {
|
||||
$updatedOn = self::rssValue($channel, 'pubDate');
|
||||
if ($updatedOn == 'pubDate not found') $updatedOn = null;
|
||||
if (($updatedOn = self::rssValue($channel, 'lastBuildDate')) == 'lastBuildDate not found') {
|
||||
if (($updatedOn = self::rssValue($channel, 'pubDate')) == 'pubDate not found') {
|
||||
$updatedOn = null;
|
||||
}
|
||||
}
|
||||
|
||||
$feed = new Feed();
|
||||
|
@ -148,9 +158,8 @@ class Feed {
|
|||
* @return array|Feed[] ['ok' => feed]
|
||||
*/
|
||||
private static function fromAtom(DOMDocument $xml, string $url): array {
|
||||
$root = $xml->getElementsByTagNameNS(self::ATOM_NS, 'feed')->item(0);
|
||||
$updatedOn = self::atomValue($root, 'updated');
|
||||
if ($updatedOn == 'pubDate not found') $updatedOn = null;
|
||||
$root = $xml->getElementsByTagNameNS(self::ATOM_NS, 'feed')->item(0);
|
||||
if (($updatedOn = self::atomValue($root, 'updated')) == 'pubDate not found') $updatedOn = null;
|
||||
|
||||
$feed = new Feed();
|
||||
$feed->title = self::atomValue($root, 'title');
|
||||
|
@ -252,8 +261,9 @@ class Feed {
|
|||
* @param int $itemId The ID of the item to be updated
|
||||
* @param FeedItem $item The item to be updated
|
||||
* @param SQLite3 $db A database connection to use for the update
|
||||
* @return bool|SQLite3Result The result if the update is successful, false if it failed
|
||||
*/
|
||||
private static function updateItem(int $itemId, FeedItem $item, SQLite3 $db): void {
|
||||
private static function updateItem(int $itemId, FeedItem $item, SQLite3 $db): bool|SQLite3Result {
|
||||
$query = $db->prepare(<<<'SQL'
|
||||
UPDATE item
|
||||
SET title = :title,
|
||||
|
@ -268,7 +278,7 @@ class Feed {
|
|||
$query->bindValue(':updated', $item->updatedOn);
|
||||
$query->bindValue(':content', $item->content);
|
||||
$query->bindValue(':id', $itemId);
|
||||
$query->execute();
|
||||
return $query->execute();
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -277,8 +287,9 @@ class Feed {
|
|||
* @param int $feedId The ID of the feed to which the item should be added
|
||||
* @param FeedItem $item The item to be added
|
||||
* @param SQLite3 $db A database connection to use for the addition
|
||||
* @return bool|SQLite3Result The result if the update is successful, false if it failed
|
||||
*/
|
||||
private static function addItem(int $feedId, FeedItem $item, SQLite3 $db): void {
|
||||
private static function addItem(int $feedId, FeedItem $item, SQLite3 $db): bool|SQLite3Result {
|
||||
$query = $db->prepare(<<<'SQL'
|
||||
INSERT INTO item (
|
||||
feed_id, item_guid, item_link, title, published_on, updated_on, content
|
||||
|
@ -293,7 +304,7 @@ class Feed {
|
|||
$query->bindValue(':published', $item->publishedOn);
|
||||
$query->bindValue(':updated', $item->updatedOn);
|
||||
$query->bindValue(':content', $item->content);
|
||||
$query->execute();
|
||||
return $query->execute();
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -304,31 +315,71 @@ class Feed {
|
|||
* @return array ['ok' => true] if successful, ['error' => message] if not
|
||||
*/
|
||||
public static function updateItems(int $feedId, Feed $feed, SQLite3 $db): array {
|
||||
try {
|
||||
foreach ($feed->items as $item) {
|
||||
$existsQuery = $db->prepare(
|
||||
'SELECT id, published_on, updated_on FROM item WHERE feed_id = :feed AND item_guid = :guid');
|
||||
$existsQuery->bindValue(':feed', $feedId);
|
||||
$existsQuery->bindValue(':guid', $item->guid);
|
||||
$exists = $existsQuery->execute();
|
||||
if ($exists) {
|
||||
$existing = $exists->fetchArray(SQLITE3_ASSOC);
|
||||
if ($existing) {
|
||||
if ( $existing['published_on'] != $item->publishedOn
|
||||
|| ($existing['updated_on'] ?? '') != ($item->updatedOn ?? '')) {
|
||||
self::updateItem($existing['id'], $item, $db);
|
||||
}
|
||||
} else {
|
||||
self::addItem($feedId, $item, $db);
|
||||
|
||||
// Do not add items that are older than the oldest we currently have; this keeps us from re-adding items that
|
||||
// have been purged already
|
||||
$oldestQuery = $db->prepare(
|
||||
'SELECT MIN(coalesce(updated_on, published_on)) FROM item where feed_id = :feed AND is_bookmarked = 0');
|
||||
$oldestQuery->bindValue(':feed', $feedId);
|
||||
if (!($oldest = $oldestQuery->execute())) return Data::error($db);
|
||||
$minDate = date_create_immutable($oldest->fetchArray(SQLITE3_NUM)[0] ?? '1993-04-30T00:00:00+00:00');
|
||||
|
||||
foreach ($feed->items as $item) {
|
||||
if (date_create_immutable($item->updatedOn ?? $item->publishedOn) < $minDate) continue;
|
||||
$existsQuery = $db->prepare(
|
||||
'SELECT id, published_on, updated_on FROM item WHERE feed_id = :feed AND item_guid = :guid');
|
||||
$existsQuery->bindValue(':feed', $feedId);
|
||||
$existsQuery->bindValue(':guid', $item->guid);
|
||||
if ($exists = $existsQuery->execute()) {
|
||||
if ($existing = $exists->fetchArray(SQLITE3_ASSOC)) {
|
||||
if ( $existing['published_on'] != $item->publishedOn
|
||||
|| ($existing['updated_on'] ?? '') != ($item->updatedOn ?? '')) {
|
||||
if (!self::updateItem($existing['id'], $item, $db)) return Data::error($db);
|
||||
}
|
||||
} else {
|
||||
throw new Exception($db->lastErrorMsg());
|
||||
if (!self::addItem($feedId, $item, $db)) return Data::error($db);
|
||||
}
|
||||
} else {
|
||||
return Data::error($db);
|
||||
}
|
||||
}
|
||||
return ['ok', true];
|
||||
}
|
||||
|
||||
/**
|
||||
* Purge items for a feed
|
||||
*
|
||||
* @param int $feedId The ID of the feed to be purged
|
||||
* @param SQLite3 $db The database connection on which items should be purged
|
||||
* @return array|string[]|true[] ['ok' => true] if purging was successful, ['error' => message] if not
|
||||
*/
|
||||
private static function purgeItems(int $feedId, SQLite3 $db): array {
|
||||
|
||||
if (!array_search(PURGE_TYPE, [self::PURGE_READ, self::PURGE_BY_DAYS, self::PURGE_BY_COUNT])) {
|
||||
return ['error' => 'Unrecognized purge type ' . PURGE_TYPE];
|
||||
}
|
||||
|
||||
try {
|
||||
$sql = match (PURGE_TYPE) {
|
||||
self::PURGE_READ => 'AND is_read = 1',
|
||||
self::PURGE_BY_DAYS => 'AND date(coalesce(updated_on, published_on)) < date(:oldest)',
|
||||
self::PURGE_BY_COUNT => 'AND id IN (SELECT id FROM item WHERE feed_id = :feed
|
||||
ORDER BY date(coalesce(updated_on, published_on)) DESC
|
||||
LIMIT -1 OFFSET :keep)',
|
||||
default => 'AND 1 = 0'
|
||||
};
|
||||
|
||||
$purge = $db->prepare("DELETE FROM item WHERE feed_id = :feed AND is_bookmarked = 0 $sql");
|
||||
$purge->bindValue(':feed', $feedId);
|
||||
if (PURGE_TYPE == self::PURGE_BY_DAYS) {
|
||||
$purge->bindValue(':oldest', Data::formatDate('-' . PURGE_NUMBER . ' day'));
|
||||
} elseif (PURGE_TYPE == self::PURGE_BY_COUNT) {
|
||||
$purge->bindValue(':keep', PURGE_NUMBER);
|
||||
}
|
||||
return $purge->execute() ? ['ok' => true] : Data::error($db);
|
||||
} catch (Exception $ex) {
|
||||
return ['error' => $ex->getMessage()];
|
||||
}
|
||||
return ['ok', true];
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -362,9 +413,9 @@ class Feed {
|
|||
$feedUpdate->bindValue(':checked', Data::formatDate('now'));
|
||||
$feedUpdate->bindValue(':id', $feedId);
|
||||
if ($urlUpdate != '') $feedUpdate->bindValue(':url', $feed->url);
|
||||
$feedUpdate->execute();
|
||||
if (!$feedUpdate->execute()) return Data::error($db);
|
||||
|
||||
return ['ok' => true];
|
||||
return self::purgeItems($feedId, $db);
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -382,26 +433,24 @@ class Feed {
|
|||
$existsQuery = $db->prepare('SELECT COUNT(*) FROM feed WHERE user_id = :user AND url = :url');
|
||||
$existsQuery->bindValue(':user', $_SESSION[Key::USER_ID]);
|
||||
$existsQuery->bindValue(':url', $feed->url);
|
||||
$existsResult = $existsQuery->execute();
|
||||
if (!$existsResult) return ['error' => 'SQLite error: ' . $db->lastErrorMsg()];
|
||||
|
||||
$exists = $existsResult->fetchArray(SQLITE3_NUM);
|
||||
if ($exists[0] != 0) return ['error' => "Already subscribed to feed $feed->url"];
|
||||
if (!($exists = $existsQuery->execute())) return Data::error($db);
|
||||
if ($exists->fetchArray(SQLITE3_NUM)[0] > 0) return ['error' => "Already subscribed to feed $feed->url"];
|
||||
|
||||
$query = $db->prepare(<<<'SQL'
|
||||
INSERT INTO feed (user_id, url, title, updated_on, checked_on)
|
||||
VALUES (:user, :url, :title, :updated, :checked)
|
||||
INSERT INTO feed (
|
||||
user_id, url, title, updated_on, checked_on
|
||||
) VALUES (
|
||||
:user, :url, :title, :updated, :checked
|
||||
)
|
||||
SQL);
|
||||
$query->bindValue(':user', $_SESSION[Key::USER_ID]);
|
||||
$query->bindValue(':url', $feed->url);
|
||||
$query->bindValue(':title', $feed->title);
|
||||
$query->bindValue(':updated', $feed->updatedOn);
|
||||
$query->bindValue(':checked', Data::formatDate('now'));
|
||||
$result = $query->execute();
|
||||
|
||||
$feedId = $result ? $db->lastInsertRowID() : -1;
|
||||
if ($feedId < 0) return ['error' => $db->lastErrorMsg()];
|
||||
if (!$query->execute()) return Data::error($db);
|
||||
|
||||
$feedId = $db->lastInsertRowID();
|
||||
$result = self::updateItems($feedId, $feed, $db);
|
||||
if (array_key_exists('error', $result)) return $result;
|
||||
|
||||
|
@ -421,7 +470,7 @@ class Feed {
|
|||
$query->bindValue(':url', $url);
|
||||
$query->bindValue(':id', $existing['id']);
|
||||
$query->bindValue(':user', $_SESSION[Key::USER_ID]);
|
||||
$query->execute();
|
||||
if (!$query->execute()) return Data::error($db);
|
||||
|
||||
return self::refreshFeed($existing['id'], $url, $db);
|
||||
}
|
||||
|
@ -438,8 +487,7 @@ class Feed {
|
|||
$query = $db->prepare(
|
||||
"SELECT f.id, f.url, u.email FROM feed f INNER JOIN frc_user u ON u.id = f.user_id$extraSQL");
|
||||
if ($user > 0) $query->bindValue(':user', $user);
|
||||
$result = $query->execute();
|
||||
if (!$result) return ['error', $db->lastErrorMsg()];
|
||||
if (!($result = $query->execute())) return Data::error($db);
|
||||
$feeds = [];
|
||||
while ($feed = $result->fetchArray(SQLITE3_ASSOC)) $feeds[] = $feed;
|
||||
return $feeds;
|
||||
|
|
|
@ -25,3 +25,16 @@ const DATABASE_NAME = 'frc.db';
|
|||
* The default, 'F j, Y \a\t g:ia', equates to "August 17, 2023 at 4:45pm"
|
||||
*/
|
||||
const DATE_TIME_FORMAT = 'F j, Y \a\t g:ia';
|
||||
|
||||
/**
|
||||
* How should item purging be done? (Purging never applies to bookmarked items.) Options are:
|
||||
* - Feed::PURGE_READ - Purge all read items whenever purging is run (will not purge unread items)
|
||||
* - Feed::PURGE_BY_DAYS - Purge read and unread items older than a number of days (PURGE_NUMBER below)
|
||||
* - Feed::PURGE_BY_COUNT - Purge read and unread items beyond the number to keep (PURGE_NUMBER below)
|
||||
*/
|
||||
const PURGE_TYPE = Feed::PURGE_BY_DAYS;
|
||||
|
||||
/**
|
||||
* For purge-by-days, how many days of items should be kept; for purge-by-count, how many items should be kept
|
||||
*/
|
||||
const PURGE_NUMBER = 30;
|
||||
|
|
Loading…
Reference in New Issue
Block a user