OKPO8

Author: Dmitry Ovsyanko

__tests__/isOKPO8.js

@@ -0,0 +1,13 @@
+const {isOKPO8, randomOKPO8} = require ('..')
+
+test ('basic', () => {
+
+	expect (() => isOKPO8 ('1111111111')).toThrow ()
+
+	expect (isOKPO8 ('47296611')).toBeUndefined ()
+
+	expect (isOKPO8 ('60419873')).toBeUndefined ()
+
+	expect (isOKPO8 (randomOKPO8 ())).toBeUndefined ()
+
+})

index.js

@@ -2,6 +2,7 @@ const Check = require ('./lib/Check')
 const {OGRN_13, OGRN_15} = require ('./lib/Horner')
 const {INN_10, INN_12_2, INN_12_1} = require ('./lib/INN')
 const SNILS = require ('./lib/SNILS')
+const {OKPO_8} = require ('./lib/OKPO')
 class KPP extends Check {constructor () {super (9)}}
 
 module.exports = {
@@ -21,6 +22,9 @@ module.exports = {
 	isKPP       : str     => new KPP ().verify (str),
 	randomKPP   : ()      => new KPP ().randomValue (),
 
+	isOKPO8    : str      => new OKPO_8 ().verify (str),
+	randomOKPO8: ()       => new OKPO_8 ().random (),
+
 	isINN12: str => {
 		new INN_12_1 ().verify (str.slice (0, 11))
 		new INN_12_2 ().verify (str)

lib/Check.js

@@ -6,7 +6,9 @@ module.exports = class {
 		this.checkSumLength = checkSumLength
 		this.totalLength    = totalLength
 
-		this.modulus = 10; for (let i = 1; i < checkSumLength; i ++) this.modulus *= 10
+		this.modulus2 = 10; for (let i = 1; i < checkSumLength; i ++) this.modulus2 *= 10
+		this.modulus1 = this.modulus2 + 1
+		this.sum = 0
 
 	}
 
@@ -48,17 +50,23 @@ module.exports = class {
 
 		return b.toString ()
 
-	}	
+	}
 
-	checkSum (str) {
+	adjustSum () {
 
-		this.sum = 0
+		this.sum %= this.modulus2
+	
+	}
+
+	checkSum (str) {
 
 		this.process (str)
 
-		const {sum, modulus} = this; delete this.sum
+		this.sum %= this.modulus1
+
+		if (this.sum >= this.modulus2) this.adjustSum (str)
 
-		return String (sum % (modulus + 1) % modulus).padStart (this.checkSumLength, '0')
+		return String (this.sum).padStart (this.checkSumLength, '0')
 
 	}
 

lib/Horner.js

@@ -18,7 +18,7 @@ class Horner extends Check {
 
 }
 
-const horner = length => class OGRN_15 extends Horner {constructor () {super (length)}}
+const horner = length => class extends Horner {constructor () {super (length)}}
 
 module.exports = {
 	OGRN_13: horner (13),

lib/OKPO.js

@@ -0,0 +1,34 @@
+const ScalarProduct = require ('./ScalarProduct')
+
+const COEF = new Uint8Array ([1, 2, 3, 4, 5, 6, 7, 8, 9, 1, 2, 3, 4, 5, 6, 7, 8, 9])
+
+class OKPO extends ScalarProduct {
+
+	constructor (valueLength) {
+
+		super (COEF.slice (0, valueLength))
+
+		this.scalarProduct2 = new ScalarProduct (COEF.slice (2, valueLength + 2))
+
+	}
+
+	adjustSum (sum) {
+
+		const {scalarProduct2} = this
+
+		scalarProduct2.process (sum)
+
+		this.sum = scalarProduct2.sum % this.modulus1
+
+	}
+
+}
+
+
+const okpo = valueLength => class extends OKPO {constructor () {super (valueLength)}}
+
+module.exports = {
+
+	OKPO_8 : okpo (7),
+	
+}

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "ru-codes",
-  "version": "1.0.2",
+  "version": "1.0.3",
   "description": "ИНН, КПП и т. п.",
   "main": "index.js",
   "files": ["/lib", "/badges"],