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| import arrayify from '../node_modules/array-back/index.mjs' | |
| import t from '../node_modules/typical/index.mjs' | |
| import Definition from './option-definition.mjs' | |
| const _value = new WeakMap() | |
| /** | |
| * Encapsulates behaviour (defined by an OptionDefinition) when setting values | |
| */ | |
| class Option { | |
| constructor (definition) { | |
| this.definition = new Definition(definition) | |
| this.state = null /* set or default */ | |
| this.resetToDefault() | |
| } | |
| get () { | |
| return _value.get(this) | |
| } | |
| set (val) { | |
| this._set(val, 'set') | |
| } | |
| _set (val, state) { | |
| const def = this.definition | |
| if (def.isMultiple()) { | |
| /* don't add null or undefined to a multiple */ | |
| if (val !== null && val !== undefined) { | |
| const arr = this.get() | |
| if (this.state === 'default') arr.length = 0 | |
| arr.push(def.type(val)) | |
| this.state = state | |
| } | |
| } else { | |
| /* throw if already set on a singlar defaultOption */ | |
| if (!def.isMultiple() && this.state === 'set') { | |
| const err = new Error(`Singular option already set [${this.definition.name}=${this.get()}]`) | |
| err.name = 'ALREADY_SET' | |
| err.value = val | |
| err.optionName = def.name | |
| throw err | |
| } else if (val === null || val === undefined) { | |
| _value.set(this, val) | |
| // /* required to make 'partial: defaultOption with value equal to defaultValue 2' pass */ | |
| // if (!(def.defaultOption && !def.isMultiple())) { | |
| // this.state = state | |
| // } | |
| } else { | |
| _value.set(this, def.type(val)) | |
| this.state = state | |
| } | |
| } | |
| } | |
| resetToDefault () { | |
| if (t.isDefined(this.definition.defaultValue)) { | |
| if (this.definition.isMultiple()) { | |
| _value.set(this, arrayify(this.definition.defaultValue).slice()) | |
| } else { | |
| _value.set(this, this.definition.defaultValue) | |
| } | |
| } else { | |
| if (this.definition.isMultiple()) { | |
| _value.set(this, []) | |
| } else { | |
| _value.set(this, null) | |
| } | |
| } | |
| this.state = 'default' | |
| } | |
| static create (definition) { | |
| definition = new Definition(definition) | |
| if (definition.isBoolean()) { | |
| return FlagOption.create(definition) | |
| } else { | |
| return new this(definition) | |
| } | |
| } | |
| } | |
| class FlagOption extends Option { | |
| set (val) { | |
| super.set(true) | |
| } | |
| static create (def) { | |
| return new this(def) | |
| } | |
| } | |
| export default Option | |