mailbox/cassandra/src/main/java/org/apache/james/mailbox/cassandra/search/AllSearchOverride.java

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package org.apache.james.mailbox.cassandra.search;

import jakarta.inject.Inject;

import org.apache.james.mailbox.MailboxSession;
import org.apache.james.mailbox.MessageUid;
import org.apache.james.mailbox.cassandra.ids.CassandraId;
import org.apache.james.mailbox.cassandra.mail.CassandraMessageIdDAO;
import org.apache.james.mailbox.model.Mailbox;
import org.apache.james.mailbox.model.SearchQuery;
import org.apache.james.mailbox.store.search.ListeningMessageSearchIndex;

import reactor.core.publisher.Flux;

public class AllSearchOverride implements ListeningMessageSearchIndex.SearchOverride {
    private final CassandraMessageIdDAO dao;

    @Inject
    public AllSearchOverride(CassandraMessageIdDAO dao) {
        this.dao = dao;
    }

    @Override
    public boolean applicable(SearchQuery searchQuery, MailboxSession session) {
        return isAll(searchQuery)
            || isFromOne(searchQuery)
            || isEmpty(searchQuery);
    }

    private boolean isAll(SearchQuery searchQuery) {
        return searchQuery.getCriteria().size() == 1
            && searchQuery.getCriteria().get(0).equals(SearchQuery.uid(new SearchQuery.UidRange(MessageUid.MIN_VALUE, MessageUid.MAX_VALUE)))
            && searchQuery.getSorts().equals(SearchQuery.DEFAULT_SORTS);
    }

    private boolean isFromOne(SearchQuery searchQuery) {
        return searchQuery.getCriteria().size() == 1
            && searchQuery.getCriteria().get(0).equals(SearchQuery.all())
            && searchQuery.getSorts().equals(SearchQuery.DEFAULT_SORTS);
    }

    private boolean isEmpty(SearchQuery searchQuery) {
        return searchQuery.getCriteria().isEmpty()
            && searchQuery.getSorts().equals(SearchQuery.DEFAULT_SORTS);
    }

    @Override
    public Flux<MessageUid> search(MailboxSession session, Mailbox mailbox, SearchQuery searchQuery) {
        return dao.listUids((CassandraId) mailbox.getMailboxId());
    }
}