syntax = "proto3";

message Message {
    enum Type {
        SENDER_DELIVERY_RECEIPT = 0;
        PLAINTEXT_CONTENT = 1;
        CIPHERTEXT = 2;
        PREKEY_BUNDLE = 3;
        TEST_NOTIFICATION = 4;
    }
    Type type = 1;
    string receiptId = 2;
    optional bytes encryptedContent = 3;
    optional PlaintextContent plaintextContent = 4;
}

message PlaintextContent {
    optional DecryptionErrorMessage decryptionErrorMessage = 1;
    optional RetryErrorMessage retryControlError = 2; 

    message RetryErrorMessage { }

    message DecryptionErrorMessage {
        enum Type {
            UNKNOWN = 0;
            PREKEY_UNKNOWN = 1;
        }
        Type type = 1;
    }
}


message EncryptedContent {

    optional string groupId = 2;
    optional bool isDirectChat = 3;

    /// This can be added, so the receiver can check weather he is up to date with the current profile
    optional int64 senderProfileCounter = 4;

    optional MessageUpdate messageUpdate  = 5;
    optional Media media = 6;
    optional MediaUpdate mediaUpdate = 7;
    optional ContactUpdate contactUpdate = 8;
    optional ContactRequest contactRequest = 9;
    optional FlameSync flameSync = 10;
    optional PushKeys pushKeys = 11;
    optional Reaction reaction  = 12;
    optional TextMessage textMessage  = 13;
    optional GroupCreate groupCreate  = 14;
    optional GroupJoin groupJoin  = 15;
    optional GroupUpdate groupUpdate  = 16;
    optional ResendGroupPublicKey resendGroupPublicKey = 17;


    message GroupCreate {
        // key for the state stored on the server
        bytes stateKey = 3;
        bytes groupPublicKey = 4;
    }

    message GroupJoin {
        // key for the state stored on the server
        bytes groupPublicKey = 1;
    }

    message ResendGroupPublicKey {

    }

    message GroupUpdate {
        string groupActionType = 1; // GroupActionType.name
        optional int64 affectedContactId = 2;
        optional string newGroupName = 3;
        optional int64 newDeleteMessagesAfterMilliseconds = 4;
    }

    message TextMessage {
        string senderMessageId = 1;
        string text = 2;
        int64 timestamp = 3;
        optional string quoteMessageId = 4;
    }

    message Reaction {
        string targetMessageId = 1;
        string emoji = 2;
        bool remove = 3;
    }

    message MessageUpdate {
        enum Type {
            DELETE = 0;
            EDIT_TEXT = 1;
            OPENED = 2;
        }
        Type type = 1;
        optional string senderMessageId = 2;
        repeated string multipleTargetMessageIds = 3;
        optional string text = 4;
        int64 timestamp = 5;
    }

    message Media {
        enum Type {
            REUPLOAD = 0;
            IMAGE = 1;
            VIDEO = 2;
            GIF = 3;
        }

        string senderMessageId = 1;
        Type type = 2;
        optional int64 displayLimitInMilliseconds = 3;
        bool requiresAuthentication = 4;
        int64 timestamp = 5;
        optional string quoteMessageId = 6;

        optional bytes downloadToken = 7;
        optional bytes encryptionKey = 8;
        optional bytes encryptionMac = 9;
        optional bytes encryptionNonce = 10;
    }

    message MediaUpdate {
        enum Type {
            REOPENED = 0;
            STORED = 1;
            DECRYPTION_ERROR = 2;
        }
        Type type = 1;
        string targetMessageId = 2;
    }

    message ContactRequest {
        enum Type {
            REQUEST = 0;
            REJECT = 1;
            ACCEPT = 2;
        }
        Type type = 1;
    }

    message ContactUpdate {
        enum Type {
            REQUEST = 0;
            UPDATE = 1;
        }

        Type type = 1;
        optional bytes avatarSvgCompressed = 2;
        optional string username = 3;
        optional string displayName = 4;
    }

    message PushKeys {
        enum Type {
            REQUEST = 0;
            UPDATE = 1;
        }

        Type type = 1;
        optional int64 keyId = 2;
        optional bytes key = 3;
        optional int64 createdAt = 4;
    }

    message FlameSync {
        int64 flameCounter = 1;
        int64 lastFlameCounterChange = 2;
        bool bestFriend = 3;
    }

}