import { ListPageSettings } from '@azure/communication-chat' ; import { ChatContext } from '../ChatContext' ; import { PagedAsyncIterableIterator } from '@azure/core-paging' ; import { ChatErrorTarget } from '../ChatClientState' ; type IteratorCreatorFn < T , OptionsType , PageT = T [ ] > = ( options ? : OptionsType ) => PagedAsyncIterableIterator < T , PageT > ; param iteratorCreator param context param decorateFn export const createDecoratedIterator = < ItemType , OptionsType > ( iteratorCreator , context , decorateFn ) => { return ( ... args ) : PagedAsyncIterableIterator < ItemType > => { const threadsIterator = iteratorCreator ( ... args ) ; return { async next ( ) { const result = await threadsIterator . next ( ) ; if ( ! result . done && result . value ) { decorateFn ( result . value , context ) ; } return result ; } , [ Symbol . asyncIterator ] ( ) { return this ; } , byPage : ( settings = { } ) : AsyncIterableIterator < ItemType [ ] > => { const pages = threadsIterator . byPage ( settings ) ; return { async next ( ) { const result = await pages . next ( ) ; const page = result . value ; if ( ! result . done && result . value ) { context . batch ( ( ) => { for ( const item of page ) { decorateFn ( item , context ) ; } } ) ; } return result ; } , [ Symbol . asyncIterator ] ( ) { return this ; } } ; } } ; } ; } ; param iteratorCreator param context param target See  ChatContext . asyncTeeErrorToState .
 *  returns export const createErrorHandlingIterator = < ItemType , OptionsType > ( iteratorCreator , context , target ) : IteratorCreatorFn < ItemType , OptionsType > => { return ( ... args ) : PagedAsyncIterableIterator < ItemType > => { const innerIter = iteratorCreator ( ... args ) ; return { next : context . withAsyncErrorTeedToState ( innerIter . next . bind ( innerIter ) , target ) , [ Symbol . asyncIterator ] ( ) { return this ; } , byPage : ( settings = { } ) : AsyncIterableIterator < ItemType [ ] > => { const pages = innerIter . byPage ( settings ) ; return { next : context . withAsyncErrorTeedToState ( pages . next . bind ( pages ) , target ) , [ Symbol . asyncIterator ] ( ) { return this ; } } ; } } ; } ; } ;