Struct Prototype

Prototype to create a JS struct check library.

Code Quality Status

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Description

It's a function to check a simple data structure.

Method

• structPrototype(STRUCTURE|TYPE)(DATA): DATA|ERROR

Parameters

TYPE

The primitive type you want to check. In all cases must be pass as in an string

Supported:

• 'string'
• 'number'
• 'boolean'
• 'object'
• 'string'
• 'array'
• 'null'

STRUCTURE

You can define an data structure using a little more complex schema.

• Array: [TYPE], check every element of the array to match that type
• Object: { [fieldName]: TYPE }: check if every field define match that the type declared
• Function: ``(data) => true|false: you can pass a function callback to check whatever you want, **must return** true` or `false`

DATA

Represents the values you want to check

Response

DATA

If the check succes, returns the values.

ERROR

If the check fails, throws an Error with an message explaining what happened

Usage

• Simple use

const { structPrototype } = require('struct-prototype');

structPrototype('string')('It is fine');

/*
output: 'It is fine'
*/

structPrototype('number')('It is fine');

/*
output: Error. '"It is fine" is not number type'
*/

• Array structure

const { structPrototype } = require('struct-prototype');

structPrototype(['string'])(['It is fine']);

/*
output: ['It is fine']
*/

structPrototype(['number'])(['It is fine']);

/*
output: Error. '"It is fine" is not number type'
*/

structPrototype(['Boolean'])('It is fine');

/*
output: Error. 'Data Structure is not an array'
*/

• Object structure

const { structPrototype } = require('struct-prototype');

const myDataStructure = {
    name: 'string',
    age: 'number',
    isAdmin: 'Boolean'
}

structPrototype(myDataStructure)({
    name: 'Gastón',
    age: 34,
    isAdmin: true
});

/*
output: {
    name: 'Gastón',
    age: 34,
    isAdmin: true
}
*/

structPrototype(myDataStructure)({
    name: 'Gastón',
    age: '34',
    isAdmin: true
});

/*
output: Error. '"34" is not number type'
*/

structPrototype(myDataStructure)('It is fine');

/*
output: Error. 'Data Structure is not an object'
*/

• Custom Function

const { structPrototype } = require('struct-prototype');

const isOverThirty = ({ age }) => age > 30;

structPrototype(isOverThirty)({
    name: 'Gastón',
    age: '34',
    isAdmin: true
});

/*
output: {
    name: 'Gastón',
    age: 34,
    isAdmin: true
}
*/

structPrototype(isOverThirty)({
    name: 'Gastón',
    age: 23,
    isAdmin: true
});

/*
output: Error. '"23" is not custom type'
*/

structPrototype(myDataStructure)('It is fine');

/*
output: Error. '"It is fine" is not custom type'
*/