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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/wrappy/wrappy.js | |
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api, login, auth
Diffstat (limited to 'node_modules/wrappy/wrappy.js')
-rw-r--r-- | node_modules/wrappy/wrappy.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/node_modules/wrappy/wrappy.js b/node_modules/wrappy/wrappy.js new file mode 100644 index 0000000..bb7e7d6 --- /dev/null +++ b/node_modules/wrappy/wrappy.js @@ -0,0 +1,33 @@ +// Returns a wrapper function that returns a wrapped callback +// The wrapper function should do some stuff, and return a +// presumably different callback function. +// This makes sure that own properties are retained, so that +// decorations and such are not lost along the way. +module.exports = wrappy +function wrappy (fn, cb) { + if (fn && cb) return wrappy(fn)(cb) + + if (typeof fn !== 'function') + throw new TypeError('need wrapper function') + + Object.keys(fn).forEach(function (k) { + wrapper[k] = fn[k] + }) + + return wrapper + + function wrapper() { + var args = new Array(arguments.length) + for (var i = 0; i < args.length; i++) { + args[i] = arguments[i] + } + var ret = fn.apply(this, args) + var cb = args[args.length-1] + if (typeof ret === 'function' && ret !== cb) { + Object.keys(cb).forEach(function (k) { + ret[k] = cb[k] + }) + } + return ret + } +} |