import * as q from '../../../backend/src/Model' ; import { AppState } from '../reducers' ; import { Dispatch } from 'redux' ; import { makePublishEvent , rendererEvents } from '../../../events' ; import { moveSelectionUpOrDownwards } from './visibleTreeTraversal' ; import { globalActions } from '.' ; export const clearTopic = ( topic , recursive ) => async ( dispatch , getState ) => { const topicsForPurging = recursive ? [ topic , ... topic . childTopics ( ) ] : [ topic ] ; if ( recursive ) { const topicCount = topic . childTopicCount ( ) ; const topicDelta = topic . hasMessage ( ) ? - 1 : 0 ; const childTopicsMessage = topicCount + topicDelta > 0 ? ` and ${ topicCount + topicDelta } child ${ topicCount + topicDelta === 1 ? 'topic' : 'topics' }` : '' ; const confirmed = await dispatch ( globalActions . requestConfirmation ( 'Confirm delete' , `Do you want to clear "${ topic . path ( ) }"${ childTopicsMessage }?\n\nThis function will send an empty payload (QoS 0, retain) to this and every subtopic, clearing retained topics in the process. Only use this function if you know what you are doing.` ) ) ; if ( ! confirmed ) { return ; } } dispatch ( moveSelectionUpOrDownwards ( 'next' ) ) ; const { connectionId } = getState ( ) . connection ; if ( ! connectionId ) { return ; } const publishEvent = makePublishEvent ( connectionId ) ; topicsForPurging . filter ( t => t . path ( ) !== '' && t . hasMessage ( ) ) . map ( t => t . path ( ) ) . forEach ( ( path , idx ) => { const mqttMessage = { topic : path , payload : null , retain : true , qos : 0 as 0 , messageId : undefined , } ; setTimeout ( ( ) => rendererEvents . emit ( publishEvent , mqttMessage ) , 20 * idx ) ; } ) ; } ;