server/protocols/jmap-draft/src/main/java/org/apache/james/jmap/draft/crypto/AccessTokenManagerImpl.java

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package org.apache.james.jmap.draft.crypto;

import jakarta.inject.Inject;

import org.apache.james.core.Username;
import org.apache.james.jmap.api.access.AccessToken;
import org.apache.james.jmap.api.access.AccessTokenRepository;
import org.apache.james.jmap.api.access.exceptions.InvalidAccessToken;
import org.apache.james.jmap.draft.api.AccessTokenManager;

import com.google.common.base.Preconditions;

import reactor.core.publisher.Mono;

public class AccessTokenManagerImpl implements AccessTokenManager {

    private final AccessTokenRepository accessTokenRepository;

    @Inject
    AccessTokenManagerImpl(AccessTokenRepository accessTokenRepository) {
        this.accessTokenRepository = accessTokenRepository;
    }

    @Override
    public Mono<AccessToken> grantAccessToken(Username username) {
        Preconditions.checkNotNull(username);
        AccessToken accessToken = AccessToken.generate();

        return accessTokenRepository.addToken(username, accessToken)
            .thenReturn(accessToken);
    }

    @Override
    public Mono<Username> getUsernameFromToken(AccessToken token) throws InvalidAccessToken {
        return accessTokenRepository.getUsernameFromToken(token);
    }
    
    @Override
    public Mono<Boolean> isValid(AccessToken token) throws InvalidAccessToken {
        try {
            return getUsernameFromToken(token)
                .thenReturn(true);
        } catch (InvalidAccessToken e) {
            return Mono.just(false);
        }
    }

    @Override
    public Mono<Void> revoke(AccessToken token) {
        return accessTokenRepository.removeToken(token);
    }

}