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<?php
class Labels
{
static function label_to_feed_id(int $label): int {
return LABEL_BASE_INDEX - 1 - abs($label);
}
static function feed_to_label_id(int $feed): int {
return LABEL_BASE_INDEX - 1 + abs($feed);
}
static function find_id(string $label, int $owner_uid): int {
$pdo = Db::pdo();
$sth = $pdo->prepare("SELECT id FROM ttrss_labels2 WHERE LOWER(caption) = LOWER(?)
AND owner_uid = ? LIMIT 1");
$sth->execute([$label, $owner_uid]);
if ($row = $sth->fetch()) {
return $row['id'];
} else {
return 0;
}
}
static function find_caption(int $label, int $owner_uid): string {
$pdo = Db::pdo();
$sth = $pdo->prepare("SELECT caption FROM ttrss_labels2 WHERE id = ?
AND owner_uid = ? LIMIT 1");
$sth->execute([$label, $owner_uid]);
if ($row = $sth->fetch()) {
return $row['caption'];
} else {
return "";
}
}
/**
* @return array<int, array<string, string>>
*/
static function get_as_hash(int $owner_uid): array {
$rv = [];
$labels = Labels::get_all($owner_uid);
foreach ($labels as $i => $label) {
$rv[(int)$label["id"]] = $labels[$i];
}
return $rv;
}
/**
* @return array<int, array<string, string>> An array of label detail arrays
*/
static function get_all(int $owner_uid) {
$rv = array();
$pdo = Db::pdo();
$sth = $pdo->prepare("SELECT id, fg_color, bg_color, caption FROM ttrss_labels2
WHERE owner_uid = ? ORDER BY caption");
$sth->execute([$owner_uid]);
while ($line = $sth->fetch(PDO::FETCH_ASSOC)) {
array_push($rv, $line);
}
return $rv;
}
/**
* @param array{'no-labels': 1}|array<int, array<int, array{0: int, 1: string, 2: string, 3: string}>> $labels
* [label_id, caption, fg_color, bg_color]
*
* @see Article::_get_labels()
*/
static function update_cache(int $owner_uid, int $id, array $labels, bool $force = false): void {
$pdo = Db::pdo();
if ($force)
self::clear_cache($id);
if (!$labels)
$labels = Article::_get_labels($id);
$labels = json_encode($labels);
$sth = $pdo->prepare("UPDATE ttrss_user_entries SET
label_cache = ? WHERE ref_id = ? AND owner_uid = ?");
$sth->execute([$labels, $id, $owner_uid]);
}
static function clear_cache(int $id): void {
$pdo = Db::pdo();
$sth = $pdo->prepare("UPDATE ttrss_user_entries SET
label_cache = '' WHERE ref_id = ?");
$sth->execute([$id]);
}
static function remove_article(int $id, string $label, int $owner_uid): void {
$label_id = self::find_id($label, $owner_uid);
if (!$label_id) return;
$pdo = Db::pdo();
$sth = $pdo->prepare("DELETE FROM ttrss_user_labels2
WHERE
label_id = ? AND
article_id = ?");
$sth->execute([$label_id, $id]);
self::clear_cache($id);
}
static function add_article(int $id, string $label, int $owner_uid): void {
$label_id = self::find_id($label, $owner_uid);
if (!$label_id) return;
$pdo = Db::pdo();
$sth = $pdo->prepare("SELECT
article_id FROM ttrss_labels2, ttrss_user_labels2
WHERE
label_id = id AND
label_id = ? AND
article_id = ? AND owner_uid = ?
LIMIT 1");
$sth->execute([$label_id, $id, $owner_uid]);
if (!$sth->fetch()) {
$sth = $pdo->prepare("INSERT INTO ttrss_user_labels2
(label_id, article_id) VALUES (?, ?)");
$sth->execute([$label_id, $id]);
}
self::clear_cache($id);
}
static function remove(int $id, int $owner_uid): void {
if (!$owner_uid) $owner_uid = $_SESSION["uid"];
$pdo = Db::pdo();
$tr_in_progress = false;
try {
$pdo->beginTransaction();
} catch (Exception $e) {
$tr_in_progress = true;
}
$sth = $pdo->prepare("SELECT caption FROM ttrss_labels2
WHERE id = ?");
$sth->execute([$id]);
$row = $sth->fetch();
$caption = $row['caption'];
$sth = $pdo->prepare("DELETE FROM ttrss_labels2 WHERE id = ?
AND owner_uid = ?");
$sth->execute([$id, $owner_uid]);
if ($sth->rowCount() != 0 && $caption) {
/* Remove access key for the label */
$ext_id = LABEL_BASE_INDEX - 1 - $id;
$sth = $pdo->prepare("DELETE FROM ttrss_access_keys WHERE
feed_id = ? AND owner_uid = ?");
$sth->execute([$ext_id, $owner_uid]);
/* Remove cached data */
$sth = $pdo->prepare("UPDATE ttrss_user_entries SET label_cache = ''
WHERE owner_uid = ?");
$sth->execute([$owner_uid]);
}
if (!$tr_in_progress) $pdo->commit();
}
/**
* @return false|int false if the check for an existing label failed, otherwise the number of rows inserted (1 on success)
*/
static function create(string $caption, ?string $fg_color = '', ?string $bg_color = '', ?int $owner_uid = null) {
if (!$owner_uid) $owner_uid = $_SESSION['uid'];
$pdo = Db::pdo();
$tr_in_progress = false;
try {
$pdo->beginTransaction();
} catch (Exception $e) {
$tr_in_progress = true;
}
$sth = $pdo->prepare("SELECT id FROM ttrss_labels2
WHERE LOWER(caption) = LOWER(?) AND owner_uid = ?");
$sth->execute([$caption, $owner_uid]);
if (!$sth->fetch()) {
$sth = $pdo->prepare("INSERT INTO ttrss_labels2
(caption,owner_uid,fg_color,bg_color) VALUES (?, ?, ?, ?)");
$sth->execute([$caption, $owner_uid, $fg_color, $bg_color]);
$result = $sth->rowCount();
} else {
$result = false;
}
if (!$tr_in_progress) $pdo->commit();
return $result;
}
}
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