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{"ast":null,"code":"\"use strict\";\n\nimport * as React from 'react';\nexport function useEventEmitter(listen) {\n const listenRef = React.useRef(listen);\n React.useEffect(() => {\n listenRef.current = listen;\n });\n const listeners = React.useRef(Object.create(null));\n const create = React.useCallback(target => {\n const removeListener = (type, callback) => {\n const callbacks = listeners.current[type] ? listeners.current[type][target] : undefined;\n if (!callbacks) {\n return;\n }\n const index = callbacks.indexOf(callback);\n if (index > -1) {\n callbacks.splice(index, 1);\n }\n };\n const addListener = (type, callback) => {\n listeners.current[type] = listeners.current[type] || {};\n listeners.current[type][target] = listeners.current[type][target] || [];\n listeners.current[type][target].push(callback);\n let removed = false;\n return () => {\n if (!removed) {\n removed = true;\n removeListener(type, callback);\n }\n };\n };\n return {\n addListener,\n removeListener\n };\n }, []);\n const emit = React.useCallback(({\n type,\n data,\n target,\n canPreventDefault\n }) => {\n const items = listeners.current[type] || {};\n const callbacks = target !== undefined ? items[target]?.slice() : [].concat(...Object.keys(items).map(t => items[t])).filter((cb, i, self) => self.lastIndexOf(cb) === i);\n const event = {\n get type() {\n return type;\n }\n };\n if (target !== undefined) {\n Object.defineProperty(event, 'target', {\n enumerable: true,\n get() {\n return target;\n }\n });\n }\n if (data !== undefined) {\n Object.defineProperty(event, 'data', {\n enumerable: true,\n get() {\n return data;\n }\n });\n }\n if (canPreventDefault) {\n let defaultPrevented = false;\n Object.defineProperties(event, {\n defaultPrevented: {\n enumerable: true,\n get() {\n return defaultPrevented;\n }\n },\n preventDefault: {\n enumerable: true,\n value() {\n defaultPrevented = true;\n }\n }\n });\n }\n listenRef.current?.(event);\n callbacks?.forEach(cb => cb(event));\n return event;\n }, []);\n return React.useMemo(() => ({\n create,\n emit\n }), [create, emit]);\n}","map":{"version":3,"names":["React","useEventEmitter","listen","listenRef","useRef","useEffect","current","listeners","Object","create","useCallback","target","removeListener","type","callback","callbacks","undefined","index","indexOf","splice","addListener","push","removed","emit","data","canPreventDefault","items","slice","concat","keys","map","t","filter","cb","i","self","lastIndexOf","event","defineProperty","enumerable","get","defaultPrevented","defineProperties","preventDefault","value","forEach","useMemo"],"sources":["/Users/pmouli/Documents/GitHub.nosync/boots-strapper/mobile/node_modules/@react-navigation/core/src/useEventEmitter.tsx"],"sourcesContent":["import * as React from 'react';\n\nimport type { EventArg, EventConsumer, EventEmitter } from './types';\n\nexport type NavigationEventEmitter<T extends Record<string, any>> =\n EventEmitter<T> & {\n create: (target: string) => EventConsumer<T>;\n };\n\ntype Listeners = ((e: any) => void)[];\n\n/**\n * Hook to manage the event system used by the navigator to notify screens of various events.\n */\nexport function useEventEmitter<T extends Record<string, any>>(\n listen?: (e: any) => void\n): NavigationEventEmitter<T> {\n const listenRef = React.useRef(listen);\n\n React.useEffect(() => {\n listenRef.current = listen;\n });\n\n const listeners = React.useRef<Record<string, Record<string, Listeners>>>(\n Object.create(null)\n );\n\n const create = React.useCallback((target: string) => {\n const removeListener = (type: string, callback: (data: any) => void) => {\n const callbacks = listeners.current[type]\n ? 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