spur-common/src/utils/Utils.coffee

A Node.JS library of common modules used as a base to most Node.JS applications.

module.exports = (_, Promise, fsPromise, JSON)->

  new class Utils

    prop:(prop)-> (ob)-> ob[prop]

    extendWith:(ob1)-> (ob2)-> _.extend(ob2, ob1)

    capitalize:(str)->
      return "" unless str
      str.charAt(0).toUpperCase() + str.substring(1)

    identity:(val)-> ()-> val

    mapObject:(ob, fn)->
      newOb = {}
      for k, v of ob
        newOb[k] = fn(v)
      newOb

    deepClone:(ob)->
      JSON.parse(JSON.stringify(ob))

    promiseQueue:(fns)->
      queue = Promise.resolve(true)
      for fn in fns
        queue = queue.then(fn)
      queue

    readFile: (filePath) =>
      fsPromise
        .readFileAsync(filePath, {encoding: "utf8"})

    readJsonFile: (filePath) =>
      @readFile(filePath)
        .then (data)->
          try
            return JSON.parse(data)
          catch err
            Promise.reject new Error("Error Parsing JSON: #{err}")