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utils.js
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utils.js
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// Returns the value of an object's key if it exists.
exports.getKey = function (obj, key) {
if (obj && obj[key] != null) {
return obj[key]
} else {
return obj
}
}
// Returns a new instance of the module with a wrapper applied.
exports.wrap = function(target, wrapper) {
var wrapped =
{ auth: target.auth
, defaults: target.defaults
, _get: target._get
}
for (var prop in target) {
if (wrapped[prop] === undefined) {
wrapped[prop] = wrapper(target[prop], target)
}
}
return wrapped
}
// A wrapper to initialize the options object.
exports.initParams = function(fn, context) {
return function(options, callback) {
var newOptions = {}
if (typeof options === 'object' && !Array.isArray(options)) {
newOptions = options
newOptions.id = options.id || options.name
} else if (typeof options === 'function') {
callback = options
newOptions = {}
} else {
newOptions.id = options
}
newOptions.headers = newOptions.headers || {}
newOptions._query = {}
return fn.call(context, newOptions, callback)
}
}
// Copies the keys of obj2 onto obj1 if they aren't present on obj1
exports.merge = function(obj1, obj2) {
for (var prop in obj2) {
if (obj1[prop] == null) {
obj1[prop] = obj2[prop]
}
}
return obj1
}
// Returns new object with specific keys copied from passed object
exports.pick = function(obj, keys) {
return keys.reduce(function(cumm, key) {
cumm[key] = obj[key]
return cumm
}, {})
}