| 1 | _ = require('lodash')
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| 2 | _.str = require('underscore.string')
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| 3 | parse = require('./parse')
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| 4 | Signature = require('./signature')
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| 5 |
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| 6 | isValidAlias = (alias) ->
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| 7 | return _.isString(alias) or _.isArray(alias)
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| 8 |
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| 9 | module.exports = class Option
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| 10 | constructor: (options = {}) ->
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| 11 |
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| 12 | if options.signature not instanceof Signature
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| 13 | throw new Error('Missing or invalid option signature')
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| 14 |
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| 15 | if options.signature.hasParameters()
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| 16 | throw new Error('Use the parameter option attribute')
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| 17 |
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| 18 | if options.alias? and not isValidAlias(options.alias)
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| 19 | throw new Error('Invalid alias')
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| 20 |
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| 21 | if options.parameter? and not _.isString(options.parameter)
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| 22 | throw new Error('Invalid parameter')
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| 23 |
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| 24 | if options.boolean and options.parameter?
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| 25 | throw new Error('Boolean options can\'t have parameters')
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| 26 |
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| 27 | if not options.boolean and not options.parameter?
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| 28 | throw new Error('Missing parameter')
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| 29 |
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| 30 | _.defaults options,
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| 31 | boolean: false
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| 32 | alias: []
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| 33 |
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| 34 | _.extend(this, options)
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| 35 |
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| 36 | getOptionsValue: (options) ->
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| 37 | value = options[@signature]
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| 38 |
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| 39 | if not value?
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| 40 | value = _.chain(options)
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| 41 | .pick(@alias)
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| 42 | .values()
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| 43 | .first()
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| 44 | .value()
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| 45 |
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| 46 | return value
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| 47 |
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| 48 | matches: (value) ->
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| 49 | return false if not value?
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| 50 | return not _.any [
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| 51 | @boolean and not _.isBoolean(value)
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| 52 | not @boolean and _.isBoolean(value)
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| 53 | ]
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| 54 |
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| 55 | toString: ->
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| 56 | signatures = _.map [ @signature.toString() ].concat(@alias), (signature) ->
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| 57 | return "-#{signature}" if signature.length <= 1
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| 58 | return "--#{signature}"
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| 59 |
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| 60 | result = _.str.toSentence(signatures, ', ', ', ')
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| 61 | result += " <#{@parameter}>" if @parameter?
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| 62 | return result
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