import type * as d from '../declarations' ; export const buildEvents = ( ) : d . BuildEvents => { const evCallbacks = [ ] ; const off = ( callback ) => { const index = evCallbacks . findIndex ( ( ev ) => ev . callback === callback ) ; if ( index > - 1 ) { evCallbacks . splice ( index , 1 ) ; return true ; } return false ; } ; const on = ( arg0 , arg1 ? ) : d . BuildOnEventRemove => { if ( typeof arg0 === 'function' ) { const eventName = null ; const callback = arg0 ; evCallbacks . push ( { eventName , callback , } ) ; return ( ) => off ( callback ) ; } else if ( typeof arg0 === 'string' && typeof arg1 === 'function' ) { const eventName = arg0 . toLowerCase ( ) . trim ( ) ; const callback = arg1 ; evCallbacks . push ( { eventName , callback , } ) ; return ( ) => off ( callback ) ; } return ( ) => false ; } ; const emit = ( eventName , data ) => { const normalizedEventName = eventName . toLowerCase ( ) . trim ( ) ; const callbacks = evCallbacks . slice ( ) ; for ( const ev of callbacks ) { if ( ev . eventName == null ) { try { ev . callback ( eventName , data ) ; } catch ( e ) { console . error ( e ) ; } } else if ( ev . eventName === normalizedEventName ) { try { ev . callback ( data ) ; } catch ( e ) { console . error ( e ) ; } } } } ; const unsubscribeAll = ( ) => { evCallbacks . length = 0 ; } ; return { emit , on , unsubscribeAll , } ; } ; interface EventCallback { eventName : string ; callback : Function ; }