Created
November 24, 2019 21:22
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class FrogBuilder { | |
constructor(name, gender) { | |
// Ensure that the first character is always capitalized | |
this.name = name.charAt(0).toUpperCase() + name.slice(1) | |
this.gender = gender | |
} | |
formatEyesCorrectly(eyes) { | |
return Array.isArray(eyes) ? { left: eye[0], right: eye[1] } : eyes | |
} | |
setEyes(eyes) { | |
this.eyes = this.formatEyes(eyes) | |
return this | |
} | |
setLegs(legs) { | |
if (!Array.isArray(legs)) { | |
throw new Error('"legs" is not an array') | |
} | |
this.legs = legs | |
return this | |
} | |
setScent(scent) { | |
this.scent = scent | |
return this | |
} | |
updateTongueWidthFieldName(tongue) { | |
const newTongue = { ...tongue } | |
delete newTongue['tongueWidth'] | |
newTongue.width = tongue.width | |
return newTongue | |
} | |
setTongue(tongue) { | |
const isOld = 'tongueWidth' in tongue | |
this.tongue = isOld | |
? this.updateTongueWidthFieldName(tongue, tongue.tongueWidth) | |
: tongue | |
return this | |
} | |
setHeart(heart) { | |
this.heart = heart | |
return this | |
} | |
setWeight(weight) { | |
if (typeof weight !== 'undefined') { | |
this.weight = weight | |
} | |
return this | |
} | |
setHeight(height) { | |
if (typeof height !== 'undefined') { | |
this.height = height | |
} | |
return this | |
} | |
build() { | |
return new Frog( | |
this.name, | |
this.gender, | |
this.eyes, | |
this.legs, | |
this.scent, | |
this.tongue, | |
this.heart, | |
this.weight, | |
this.height, | |
) | |
} | |
} | |
const larry = new FrogBuilder('larry', 'male') | |
.setEyes([{ volume: 1.1 }, { volume: 1.12 }]) | |
.setScent('sweaty socks') | |
.setHeart({ rate: 22 }) | |
.setWeight(6) | |
.setHeight(3.5) | |
.setLegs([ | |
{ size: 'small' }, | |
{ size: 'small' }, | |
{ size: 'small' }, | |
{ size: 'small' }, | |
]) | |
.setTongue({ tongueWidth: 18, color: 'dark red', type: 'round' }) | |
.build() |
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