A phone scrubber for quick formatting

phoneService.js

// Helper methods for dealing with phone numbers and phone related content (i.e. "tel:")

export default
{
	/**
	 * Display a phone number as a given format
	 * @param {String, Int} pnum - A Phone number
	 * @param {Int} displayCase - The desired formmatting pattern
	 * @return {String} - If good phone number, properly displayed phone number; Else, empty string;
	 */
	display(__pnum, displayCase=1)
	{
		const phoneRE = /^(\d{3})(\d{3})(\d{4})$/
		let pnum      = this.scrub(__pnum)
		let ret       = ""
		if (pnum === "")
		{
			// There was an error with the phone number
			if (this.isDebugging())
			{
				console.log('ERROR: bad phone number: `' + __pnum + '`')
			}
			return ret
		}
		switch (displayCase)
		{
			case 1:
				ret = pnum.replace(phoneRE, "$1.$2.$3")
				break
			case 2:
				ret = pnum.replace(phoneRE, "($1)$2 $3")
				break
			case 3:
				ret = pnum.replace(phoneRE, "($1)$2-$3")
				break
			case 4:
				ret = pnum.replace(phoneRE, "$1-$2-$3")
				break
			case 5:
				ret = pnum.replace(phoneRE, "$1 $2 $3")
				break
			case 6:
				ret = pnum.replace(phoneRE, "$1$2$3")
				break
			default:
				ret = pnum.replace(phoneRE, "$1.$2.$3")
				break
		}
		return ret
	},// end display()

	/**
	 * Uniform process for displaying the href of a phone number
	 * @param {String, Int} pnum - A Phone number
	 * @param {Int} displayCase - The desired formmatting pattern
	 * @return {String} - If good phone number, properly displayed phone number; Else, empty string;
	 */
	getHref(pnum)
	{
		return "tel:" + this.scrub(pnum)
	},

	/**
	 * Quick function to turn on/off reporting to console;
	 * @return {Boolean} - If we are currently debugging this file or not;
	 */ 
	isDebugging()
	{
		return false
	},

	/**
	 * Strip a phone number to just its digits;
	 * @param {String, Int, Array} pnum -- A Phone number or list of phone numbers
	 * @return {String, Array} -- If good phone number, exactly ten character string; Else, empty string;
	 *                            If array, return list of stripped phone numbers with no duplicates;
	 */
	scrub(pnum)
	{
		// If array, clean every element and remove duplicates
		if (Array.isArray(pnum))
		{
			let pnums = [];
			for (let i = 0; i < pnum.length; i++)
			{
				pnums.push(this.scrub(pnum[i]));
			}// end i-for

			// Removing duplicates:
			pnums = pnums.reduce(function(a,b)
			{
				if (a.indexOf(b) < 0 ) a.push(b);
				return a;
			}, []);
			return pnums;
		}
		if (Number.isInteger(pnum))
		{
			pnum = pnum.toString()
		}

		// Get just the digits of our number
		let ret = pnum.match(/\d+/g).map(Number).join("");
		if (ret.length < 10)
		{
			if (this.isDebugging())
			{
				console.log('\tERROR: phone numbers less than ten digits not supported')
				console.log('\t\tCurrent Length: ' + ret.length)
			}
			ret = ""
		}
		else if (ret.length > 10)
		{
			if (this.isDebugging())
			{
				// Might have a country code attached...
				console.log('\tWARNING: pnum contains more than 10 digits; Just taking last ten digits;')
				console.log('\t\tpnum: ' + pnum)
			}
			// Might have a country code attached...
			// Just take the last ten digits;
			ret = ret.slice(-10)
		}
		return ret
	}// end scrub()
}