org.apache.james.jmap.model.GetMessagesResponse Maven / Gradle / Ivy

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package org.apache.james.jmap.model;

import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import org.apache.james.jmap.methods.Method;
import org.apache.james.mailbox.model.MessageId;

import com.fasterxml.jackson.annotation.JsonIgnore;
import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
import com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder;
import com.fasterxml.jackson.databind.annotation.JsonSerialize;
import com.google.common.base.Preconditions;
import com.google.common.collect.ImmutableList;

@JsonDeserialize(builder = GetMessagesResponse.Builder.class)
public class GetMessagesResponse implements Method.Response {

    public static Builder builder() {
        return new Builder();
    }
    
    @JsonPOJOBuilder(withPrefix = "")
    public static class Builder {
        private ImmutableList messages;
        private List expectedMessageIds;

        private Builder() {
            this.messages = ImmutableList.of();
        }

        @JsonIgnore
        public Builder message(Message message) {
            this.messages = ImmutableList.of(message);
            return this;
        }

        public Builder messages(List messages) {
            this.messages = ImmutableList.copyOf(messages);
            return this;
        }

        public Builder expectedMessageIds(List expectedMessageIds) {
            this.expectedMessageIds = ImmutableList.copyOf(expectedMessageIds);
            return this;
        }
        
        public GetMessagesResponse build() {
            Preconditions.checkState(messages != null);
            return new GetMessagesResponse(messages, messagesNotFound());
        }
        

        private List messagesNotFound() {
            Set foundMessageIds = messages.stream().map(Message::getId).collect(Collectors.toSet());
            return ImmutableList.copyOf(expectedMessageIds.stream()
                .filter(id -> !foundMessageIds.contains(id))
                .collect(Collectors.toList()));
        }
    }
    
    
    
    private final List messages;
    private final List messagesNotFound;

    private GetMessagesResponse(List messages, List messagesNotFound) {
        this.messages = messages;
        this.messagesNotFound = messagesNotFound;
    }

    @JsonSerialize
    public List list() {
        return messages;
    }
    
    @JsonSerialize
    public List notFound() {
        return messagesNotFound;
    }

}