// This Source Code is in the Public Domain per: http://litesoft.org/License.txt
package InterModuleComm;

import org.litesoft.core.typeutils.*;

public final class HelloMessage implements Message
{
    public static final String PREFIX =
            Constants.PROTOCOL_PREFIX + ModuleMsgLifecycleForm.Hello + Constants.NV_SEP;
    private String mFromType;
    private String mId;

    protected HelloMessage( String pFromType, String pId )
    {
        mFromType = pFromType;
        mId = pId;
    }

    @Override
    public String toString()
    {
        return getHeader();
    }

    public String ToSendText()
    {
        return getHeader() + "\n";
    }

    public String getFromType()
    {
        return mFromType;
    }

    public String getId()
    {
        return mId;
    }

    public String getHeader()
    {
        return PREFIX + getFromType() + Constants.SPECIAL_ID_SEP + getId();
    }

    public static class Builder
    {
        private String mFromType;
        private String mId;

        public static Builder FromHeader( String pHeader )
        {
            if ( (pHeader != null) && pHeader.startsWith( PREFIX ) )
            {
                String zRest = Strings.trimLeadingSpaces( pHeader.substring( PREFIX.length() ) );
                int zSepAt = zRest.indexOf( Constants.SPECIAL_ID_SEP );
                if ( zSepAt != -1 )
                {
                    String zFromType = zRest.substring( 0, zSepAt ).trim();
                    String zId = zRest.substring( zSepAt + 1 ).trim();
                    return FromParams( zFromType, zId );
                }
            }
            return null;
        }

        private Builder( String pFromType, String pId )
        {
            mFromType = pFromType;
            mId = pId;
        }

        public static Builder FromParams( String pFromType, String pId )
        {
            pFromType = Strings.noEmpty( pFromType );
            pId = Strings.noEmpty( pId );
            if ( Strings.isAsciiIdentifier( pFromType ) && Strings.isNoSpaceAscii( pId ) )
            {
                return new Builder( pFromType, pId );
            }
            return null;
        }

        public HelloMessage ToMsg()
        {
            return new HelloMessage( mFromType, mId );
        }

        public String getFromType()
        {
            return mFromType;
        }

        public String getId()
        {
            return mId;
        }
    }
}