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/* | |
** © 2020 by Philipp Dunkel, Ben Noordhuis, Elan Shankar, Paul Miller | |
** Licensed under MIT License. | |
*/ | |
/* jshint node:true */ | |
; | |
if (process.platform !== "darwin") { | |
throw new Error(`Module 'fsevents' is not compatible with platform '${process.platform}'`); | |
} | |
const Native = require("./fsevents.node"); | |
const events = Native.constants; | |
function watch(path, since, handler) { | |
if (typeof path !== "string") { | |
throw new TypeError(`fsevents argument 1 must be a string and not a ${typeof path}`); | |
} | |
if ("function" === typeof since && "undefined" === typeof handler) { | |
handler = since; | |
since = Native.flags.SinceNow; | |
} | |
if (typeof since !== "number") { | |
throw new TypeError(`fsevents argument 2 must be a number and not a ${typeof since}`); | |
} | |
if (typeof handler !== "function") { | |
throw new TypeError(`fsevents argument 3 must be a function and not a ${typeof handler}`); | |
} | |
let instance = Native.start(Native.global, path, since, handler); | |
if (!instance) throw new Error(`could not watch: ${path}`); | |
return () => { | |
const result = instance ? Promise.resolve(instance).then(Native.stop) : Promise.resolve(undefined); | |
instance = undefined; | |
return result; | |
}; | |
} | |
function getInfo(path, flags) { | |
return { | |
path, | |
flags, | |
event: getEventType(flags), | |
type: getFileType(flags), | |
changes: getFileChanges(flags), | |
}; | |
} | |
function getFileType(flags) { | |
if (events.ItemIsFile & flags) return "file"; | |
if (events.ItemIsDir & flags) return "directory"; | |
if (events.ItemIsSymlink & flags) return "symlink"; | |
} | |
function anyIsTrue(obj) { | |
for (let key in obj) { | |
if (obj[key]) return true; | |
} | |
return false; | |
} | |
function getEventType(flags) { | |
if (events.ItemRemoved & flags) return "deleted"; | |
if (events.ItemRenamed & flags) return "moved"; | |
if (events.ItemCreated & flags) return "created"; | |
if (events.ItemModified & flags) return "modified"; | |
if (events.RootChanged & flags) return "root-changed"; | |
if (events.ItemCloned & flags) return "cloned"; | |
if (anyIsTrue(flags)) return "modified"; | |
return "unknown"; | |
} | |
function getFileChanges(flags) { | |
return { | |
inode: !!(events.ItemInodeMetaMod & flags), | |
finder: !!(events.ItemFinderInfoMod & flags), | |
access: !!(events.ItemChangeOwner & flags), | |
xattrs: !!(events.ItemXattrMod & flags), | |
}; | |
} | |
exports.watch = watch; | |
exports.getInfo = getInfo; | |
exports.constants = events; | |