Lal

Assorted NodeJS Utilities - Readme needs to be updated for v7. Use at your own risk.

Installation

npm install lal --save

Usage

Include:

lal = require('lal');

lal.random();

/* or */

{ random } = require('lal');

random();

generateUnique

Will generate a string of random characters, and can be checked against existing strings. It by default uses this alphabet but can use a custom alphabet or array of strings.

• input.charSet {string || array}: Alphabet to generate from or an array of strings.
• input.charCount {number}: string length, or amount of words in a single string if charSet is an array.
• input.existing {array}: an array of existing strings to test against so that returned string is unique.
• input.whiteSpace {boolean}: Will add spaces between characters or words.
• input.sentences {string}: Will add sentence capitalization, with commas and punctuation to string. Will only work for an array charSet
• input.preset {string}: Use an optional preset dictionary array or alpahabet string for charSet. Values:
  • 'lorem ipsum' uses 'greek'/lorem ipsum dictionary array.
  • 'hex' uses '0123456789abcdef' hex alpahabet.

var unique = lal.generateUnique(input);

console.log(unique);

// Will return a 6 character string like: 'pg99xy'

lal.generateUnique({ charCount: 20 });

// Will return a 20 character string like: 'gm4vex56vpqmqj22mkdq'

lal.generateUnique({ charSet: 'abc' });

// Will return a 6 character string like: 'cbabba'

testSet = [ 'mzw', 'pxk', 'kvz', '6rd', 'gqg', '2r4', 'abq' ];

lal.generateUnique({ charCount: 3, existing: testSet });

// Will return a 3 character unique from testSet strings like: 'yv4'

var myWords = charSet: [
	'Apple',
	'Donut',
	'Banana',
	'Pizza',
	'Grape',
	'Cherry',
	'Taco',
	'Grape',
	'Sandiwch',
	'Orange',
	'Spaghetti',
	'Salad',
	'Sushi',
	'Pho',
	'Tangerine',
	'Bacon'
];

lal.generateUnique({ charCount: 4, charSet: myWords });

// Will return a 6 character string like: 'GrapePizzaAppleDonut'

lal.generateUnique({ charCount: 30, whiteSpace: true, preset: 'lorem ipsum', sentences: true });

// Will return a string like: 
// 'Fugiat tempor, occaecat excepteur qui qui pariatur. Velit nulla lorem ullamco nostrud. Est nulla nostrud? Quis est cillum ex ut officia id aute, reprehenderit, consequat tempor elit eu anim. Qui!'

lal.generateUnique({ charCount: 6, preset: 'hex' });

// Will return a string like: '207e67'

dateFormat

lal.dateFormat({ date: Date, truncate: true})

input:

• input.date {date object}: IP to lookup
• input.truncate {boolean}: Preferred host

lal.dateFormat();
// returns the current date in a string like: Oct_4_2017_10.12_AM

lal.dateFormat({date: new Date(Date.UTC(96, 1, 2, 3, 4, 5))});
// returns Feb_1_1996_7.04_PM
 
lal.dateFormat({truncate: true});
// returns 010520210741PM 

byteFormat

lal.byteFormat(*bytes*, *decimals*);

lal.byteFormat();
// Will return a string: '0 Bytes'

lal.byteFormat(56739,1);
// Will return a string: '56.7 KB'

checkHexs

Will validate an array of color hex values using hex-color-regex returning an array with corresponding true/false values.

lal.color.checkHexs(['#89f', '#c7c7c7', '090cff', '#ddd']);

// Will return [ true, true, false, true ]

arrayList

Will return any array as a string with each item seperarated by commas and an "and" before the last item. Single item arrays will be only that item. Empty arrays will return null.

lal.arrayList(['apple','banana','orange','watermelon']);

// Will return 'apple, banana, orange and watermelon'

random

Returns a random number between 0-10, or 0 to whatev er number parameter you specify. Nothing special or new.

lal.random();

// Will 0 to 10

lal.random(999);

// Will 0 to 999

lal.color

accent

Returns a color object with amn accent color that is dark or bright depending on the average value of the input color, as well as a color that is brightened at a decreasing amount depnding on the brightness of the base color.

lal.color.accent({color: '#810059'});

/* 
  Return example:
  {
	 accent: '#1f0000', // brightend or darken color based on the input color, in this case: dark
	 bright: '#bf4b90' // brightened version.
  }
*/

illuminate

With a channel parameter it will return a single color intended to exagerate the saturation (or lack thereof) of a single channel color. Providing a floor param value will raise the brightness of the darkest color. With a limit param the brightness of a full color can be limited or increased. The range param, alongside floor can be used to scale value changes.

lal.color.illuminate({color: '#ff0000', channel: 0});

// returns #ff623c, blue colors
// 
// something like color: #00000d, channel: 2 returns a grayish #464753
// 
// though there is not the intended purpose, put in different colors and channels and see what happens!

checkHexs

Will validate an array of color hex values using hex-color-regex returning an array with corresponding true/false values.

lal.color.checkHexs(['#89f', '#c7c7c7', '090cff', '#ddd']);

// Will return [ true, true, false, true ]

solo

Solo, when given the value of a single RGB channel will return a hex color with the input value assigned to specified channel.

lal.color.solo({ channel: 0, color: 255});

// Will return #ff0000

reverse

Reverse takes a single 0-255 rgb channel value and returns the an opposite number. For example 0 returns 255, 255 returns 0. To set a lowest possible returned value, set a floor value in the second param.

lal.color.reverse(255, 24);

// Will return 24;

reverseSolo

The reverseSolo function returns a hex color, which the inverse of the provided value assign to the provied channel. If a target value is provided as the third parameter then, as the input value approaches 255, the other channels will increase to match. A forth param can be set to define the maximum on the main channel.

lal.color.reverseSolo(255);

// Will return #000000, the inverse of the value, assigned to the red (0) channel by default);

lal.color.reverseSolo(0,1);

// Will return #00ff00, the inverse of the value, assigned on the green (1) channel
 
lal.color.reverseSolo(255,2,23);

// Will return #171717, the blue (2) channel will lower to the target value, while the other channels raise to the target value. The result being a 0 value produces the full color of selected value, and as the value increases it becomes desaturated.

lal.color.reverseSolo(0,0,0,133);

// The maximum for the red channel (0) will not exceed 133 or #850000

blendLight

This function takes an object with an array of 2 colors (hex or other chroma-js color spaces) and a opacity number for the first color, and returns the LCH lightness value (0 - 100 float) of the 2 colors, weighted by the opacity value. 0 opacity will weight the first value at 0 and the second at 1. 1 opacity will weigh the first at 1 and the second at 0. Both colors will be weighted evenly at .5 opacity.

lal.color.blendLight({colors: ['#000','#fff'], opacity: .5}

// Will be around 50 (will have some decimals).

is

lal.is.image and lal.is.doc take simple mimetype strings and return a shortned file type if the matches any from the list below. If there is no match it returns false.

images

• image/jpeg
• image/png
• image/gif

documents

• text/plain
• application/pdf
• application/vnd.openxmlformats-officedocument.wordprocessingml.document (doc)

lal.is.image('image/jpeg');

// returns true

lal.is.doc('image/jpeg');

// returns false

lal.is.doc('text/plain');

// returns true

lal.is.image('text/plain');

// returns false

isObject

This function tells returns true or false if you pass it an object, and not an array.

Usage

const exampleOne = ['hello','world'];
const exampleTwo = { hello: 'world' };

console.log(lal.isObject(exampleOne)); // returns false
console.log(lal.isObject(exampleTwo)); // returns true

isObjectID

If you pass this function a 24 bit hex mongoose object ID, it will return true.

Usage

	console.log(lal.isObjectID('61e204e57abe817981347b1c')); // returns true
	console.log(lal.isObjectID('Is a 24 character string')); // returns false

ellipsis

lal.ellipsis will return a string with ' ...' ellipsis appended if the string is over the character cuttoff limit stated in the second parameter.

lal.ellipsis('The quick brown fox jumps over the lazy dog', 15);

// returns The quick brow ...

queryString

lal.queryString takes an object and returns URI encoded query string.

const testObj = {
	one: 'red',
	two: 'green',
	three: 'blue',
	and: '-June 7'
};

lal.queryString(testObj);

// returns 'one=red&two=green&three=blue&and=-June%20'

lal.queryString();

// returns ''

uno

lal.uno allows for functions to be written to recieve objects myFunction({ a: 'one' }) or individual values myFunction('one') as params.

Usage

const myFunction = (props) => {
	const { mono, date, ...rest } = lal.uno(props);
	return { mono, date, ...rest };
};

const { mono, date } = myFunction('monday');

console.log(mono, date); // logs 'monday' & undefined;

/* or */

const { mono, date } = myFunction({ date: 'monday'});

console.log(mono, date); // logs undefined & 'monday' - your function can now be shorthand and recieve complex objects

/* additionally  */

const { banana, date } = myFunction('tuesday','banana'); // the second param names the individual value

console.log(banana, date); // logs 'tuesday' & undefined;

objector

Objector takes an array of objects and returns the colletion as an object. Each contained object is assigned a key based on their "title" property. If no title is present, then it the key is taken from its index position from the orignal array. If it recieves a non-array it will be returned unchanged.

Usage

const exampleObjectArray = [
	{ title: 'Sandwich', price: 3.00, calories: 290},
	{ title: 'Pizza', price: 4.50, calories: 350},
	'I am a useless string',
	{ title: 'Hotdog', price: 2.50, calories: 225},
	{ message: 'I am an untitled object'}
];

console.log(lal.objector(objectArray)); // logs below:

{
	Sanwich: { title: 'Sandwich', price: 3.00, calories: 290},
	Pizza: { title: 'Pizza', price: 4.50, calories: 350},
	Hotdog: { title: 'Hotdog', price: 2.50, calories: 225},
	'4': { message: 'I am an untitled object'}
}

objectsMatch

This function recieves two objects, it returns true unless one property is unlike the other object, then it returns true.

Usage

const baseObj = { one: 'red', two: 'green'};
const otherObj = { one: 'red', two: 'green'};

console.log(lal.objectsMatch(baseObj, otherObj)); // true

otherObj.three = 'blue';

console.log(lal.objectsMatch(baseObj, otherObj)); // false

log

Conditionally log a value while running a provided function. The first param is your desired function. The second is whatever you wish to log. The third param is required to enable the logging, as it is undefined by default.

Usage

const myFunction = () => console.log('world');
lal.log(myFunction, 'hello', true); // logs 'hello' then 'world'.

Tests

npm test