private boolean promptToPersistPluginUpdate()

in maven-core/src/main/java/org/apache/maven/plugin/version/DefaultPluginVersionManager.java [360:445]
68 lines of code
12 McCabe index (conditional complexity)

    private boolean promptToPersistPluginUpdate( String version, String updatedVersion, String groupId,
                                                 String artifactId, Settings settings )
        throws PluginVersionResolutionException
    {
        try
        {
            StringBuffer message = new StringBuffer();

            // this means that the plugin is not registered.
            if ( version != null && version.equals( updatedVersion ) )
            {
                message.append( "Unregistered plugin detected.\n\n" );
            }
            else
            {
                message.append( "New plugin version detected.\n\n" );
            }

            message.append( "Group ID: " ).append( groupId ).append( "\n" );
            message.append( "Artifact ID: " ).append( artifactId ).append( "\n" );
            message.append( "\n" );

            // this means that we've detected a new, non-rejected plugin version.
            if ( version != null && !version.equals( updatedVersion ) )
            {
                message.append( "Registered Version: " ).append( version ).append( "\n" );
            }

            message.append( "Detected plugin version: " ).append( updatedVersion ).append( "\n" );
            message.append( "\n" );
            message.append( "Would you like to use this new version from now on? ( [Y]es, [n]o, [a]ll, n[o]ne ) " );

            // TODO: check the GUI-friendliness of this approach to collecting input.
            // If we can't port this prompt into a GUI, IDE-integration will not work well.
            getLogger().info( message.toString() );

            String persistAnswer = inputHandler.readLine();

            boolean shouldPersist = true;

            if ( !StringUtils.isEmpty( persistAnswer ) )
            {
                persistAnswer = persistAnswer.toLowerCase();

                if ( persistAnswer.startsWith( "y" ) )
                {
                    shouldPersist = true;
                }
                else if ( persistAnswer.startsWith( "a" ) )
                {
                    shouldPersist = true;

                    settings.getRuntimeInfo().setApplyToAllPluginUpdates( Boolean.TRUE );
                }
                else if ( persistAnswer.indexOf( "o" ) > -1 )
                {
                    settings.getRuntimeInfo().setApplyToAllPluginUpdates( Boolean.FALSE );
                }
                else if ( persistAnswer.startsWith( "n" ) )
                {
                    shouldPersist = false;
                }
                else
                {
                    // default to yes.
                    shouldPersist = true;
                }
            }

            if ( shouldPersist )
            {
                getLogger().info( "Updating plugin version to " + updatedVersion );
            }
            else
            {
                getLogger().info( "NOT updating plugin version to " + updatedVersion );
            }

            return shouldPersist;

        }
        catch ( IOException e )
        {
            throw new PluginVersionResolutionException( groupId, artifactId, "Can't read user input.", e );
        }
    }