78 lines
2.1 KiB
JavaScript
78 lines
2.1 KiB
JavaScript
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/*
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** © 2018 by Philipp Dunkel, Ben Noordhuis, Elan Shankar, Paul Miller
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** Licensed under MIT License.
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*/
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/* jshint node:true */
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'use strict';
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if (process.platform !== 'darwin') {
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throw new Error(`Module 'fsevents' is not compatible with platform '${process.platform}'`);
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}
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const Native = require('./fsevents.node');
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const events = Native.constants;
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function watch(path, handler) {
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if (typeof path !== 'string') {
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throw new TypeError(`fsevents argument 1 must be a string and not a ${typeof path}`);
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}
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if (typeof handler !== 'function') {
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throw new TypeError(`fsevents argument 2 must be a function and not a ${typeof handler}`);
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}
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let instance = Native.start(path, handler);
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if (!instance) throw new Error(`could not watch: ${path}`);
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return () => {
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const result = instance
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? Promise.resolve(instance).then(Native.stop)
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: Promise.resolve(undefined);
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instance = undefined;
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return result;
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};
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}
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function getInfo(path, flags) {
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return {
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path,
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flags,
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event: getEventType(flags),
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type: getFileType(flags),
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changes: getFileChanges(flags)
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};
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}
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function getFileType(flags) {
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if (events.ItemIsFile & flags) return 'file';
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if (events.ItemIsDir & flags) return 'directory';
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if (events.ItemIsSymlink & flags) return 'symlink';
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}
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function anyIsTrue(obj) {
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for (let key in obj) {
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if (obj[key]) return true;
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}
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return false;
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}
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function getEventType(flags) {
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if (events.ItemRemoved & flags) return 'deleted';
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if (events.ItemRenamed & flags) return 'moved';
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if (events.ItemCreated & flags) return 'created';
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if (events.ItemModified & flags) return 'modified';
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if (events.RootChanged & flags) return 'root-changed';
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if (events.ItemCloned & flags) return 'cloned';
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if (anyIsTrue(flags)) return 'modified';
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return 'unknown';
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}
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function getFileChanges(flags) {
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return {
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inode: !!(events.ItemInodeMetaMod & flags),
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finder: !!(events.ItemFinderInfoMod & flags),
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access: !!(events.ItemChangeOwner & flags),
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xattrs: !!(events.ItemXattrMod & flags)
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};
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}
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exports.watch = watch;
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exports.getInfo = getInfo;
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exports.constants = events;
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