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Use a read transaction when computing filter rules

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This commit is contained in:
J. King 2021-01-24 11:45:08 -05:00
parent cca4b205e4
commit a646ad77b7
1 changed files with 5 additions and 1 deletions
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6
lib/Database.php
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@ -963,7 +963,7 @@ class Database {
}
$out = (bool) $this->db->prepare("UPDATE arsse_subscriptions set $setClause, modified = CURRENT_TIMESTAMP where owner = ? and id = ?", $setTypes, "str", "int")->run($setValues, $user, $id)->changes();
$tr->commit();
// if filter rules were changed, apply them
// if filter rules were changed, apply them; this is done outside the transaction because it may take some time
if (array_key_exists("keep_rule", $data) || array_key_exists("block_rule", $data)) {
$this->subscriptionRulesApply($user, $id);
}
@ -1030,6 +1030,8 @@ class Database {
* @param integer $id The identifier of the subscription whose rules are to be evaluated
*/
protected function subscriptionRulesApply(string $user, int $id): void {
// start a transaction for read isolation
$tr = $this->begin();
$sub = $this->db->prepare("SELECT feed, coalesce(keep_rule, '') as keep, coalesce(block_rule, '') as block from arsse_subscriptions where owner = ? and id = ?", "str", "int")->run($user, $id)->getRow();
try {
$keep = Rule::prep($sub['keep']);
@ -1053,6 +1055,8 @@ class Database {
$hide[] = $r['id'];
}
}
// roll back the read transation
$tr->rollback();
// apply any marks
if ($hide) {
$this->articleMark($user, ['hidden' => true], (new Context)->articles($hide), false);