luhn-generator
Version:
A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm
170 lines (132 loc) • 21.5 kB
JavaScript
;var _slicedToArray = function () {function sliceIterator(arr, i) {var _arr = [];var _n = true;var _d = false;var _e = undefined;try {for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {_arr.push(_s.value);if (i && _arr.length === i) break;}} catch (err) {_d = true;_e = err;} finally {try {if (!_n && _i["return"]) _i["return"]();} finally {if (_d) throw _e;}}return _arr;}return function (arr, i) {if (Array.isArray(arr)) {return arr;} else if (Symbol.iterator in Object(arr)) {return sliceIterator(arr, i);} else {throw new TypeError("Invalid attempt to destructure non-iterable instance");}};}();var _ExportMap = require('../ExportMap');var _ExportMap2 = _interopRequireDefault(_ExportMap);
var _docsUrl = require('../docsUrl');var _docsUrl2 = _interopRequireDefault(_docsUrl);
var _arrayIncludes = require('array-includes');var _arrayIncludes2 = _interopRequireDefault(_arrayIncludes);function _interopRequireDefault(obj) {return obj && obj.__esModule ? obj : { default: obj };}
/*
Notes on TypeScript namespaces aka TSModuleDeclaration:
There are two forms:
- active namespaces: namespace Foo {} / module Foo {}
- ambient modules; declare module "eslint-plugin-import" {}
active namespaces:
- cannot contain a default export
- cannot contain an export all
- cannot contain a multi name export (export { a, b })
- can have active namespaces nested within them
ambient namespaces:
- can only be defined in .d.ts files
- cannot be nested within active namespaces
- have no other restrictions
*/
const rootProgram = 'root';
const tsTypePrefix = 'type:';
/**
* Detect function overloads like:
* ```ts
* export function foo(a: number);
* export function foo(a: string);
* export function foo(a: number|string) { return a; }
* ```
* @param {Set<Object>} nodes
* @returns {boolean}
*/
function isTypescriptFunctionOverloads(nodes) {
const types = new Set(Array.from(nodes, node => node.parent.type));
return (
types.has('TSDeclareFunction') && (
types.size === 1 ||
types.size === 2 && types.has('FunctionDeclaration')));
}
module.exports = {
meta: {
type: 'problem',
docs: {
url: (0, _docsUrl2.default)('export') },
schema: [] },
create: function (context) {
const namespace = new Map([[rootProgram, new Map()]]);
function addNamed(name, node, parent, isType) {
if (!namespace.has(parent)) {
namespace.set(parent, new Map());
}
const named = namespace.get(parent);
const key = isType ? `${tsTypePrefix}${name}` : name;
let nodes = named.get(key);
if (nodes == null) {
nodes = new Set();
named.set(key, nodes);
}
nodes.add(node);
}
function getParent(node) {
if (node.parent && node.parent.type === 'TSModuleBlock') {
return node.parent.parent;
}
// just in case somehow a non-ts namespace export declaration isn't directly
// parented to the root Program node
return rootProgram;
}
return {
'ExportDefaultDeclaration': node => addNamed('default', node, getParent(node)),
'ExportSpecifier': node => addNamed(node.exported.name, node.exported, getParent(node)),
'ExportNamedDeclaration': function (node) {
if (node.declaration == null) return;
const parent = getParent(node);
// support for old TypeScript versions
const isTypeVariableDecl = node.declaration.kind === 'type';
if (node.declaration.id != null) {
if ((0, _arrayIncludes2.default)([
'TSTypeAliasDeclaration',
'TSInterfaceDeclaration'],
node.declaration.type)) {
addNamed(node.declaration.id.name, node.declaration.id, parent, true);
} else {
addNamed(node.declaration.id.name, node.declaration.id, parent, isTypeVariableDecl);
}
}
if (node.declaration.declarations != null) {
for (let declaration of node.declaration.declarations) {
(0, _ExportMap.recursivePatternCapture)(declaration.id, v =>
addNamed(v.name, v, parent, isTypeVariableDecl));
}
}
},
'ExportAllDeclaration': function (node) {
if (node.source == null) return; // not sure if this is ever true
// `export * as X from 'path'` does not conflict
if (node.exported && node.exported.name) return;
const remoteExports = _ExportMap2.default.get(node.source.value, context);
if (remoteExports == null) return;
if (remoteExports.errors.length) {
remoteExports.reportErrors(context, node);
return;
}
const parent = getParent(node);
let any = false;
remoteExports.forEach((v, name) =>
name !== 'default' && (
any = true) && // poor man's filter
addNamed(name, node, parent));
if (!any) {
context.report(
node.source,
`No named exports found in module '${node.source.value}'.`);
}
},
'Program:exit': function () {
for (let _ref of namespace) {var _ref2 = _slicedToArray(_ref, 2);let named = _ref2[1];
for (let _ref3 of named) {var _ref4 = _slicedToArray(_ref3, 2);let name = _ref4[0];let nodes = _ref4[1];
if (nodes.size <= 1) continue;
if (isTypescriptFunctionOverloads(nodes)) continue;
for (let node of nodes) {
if (name === 'default') {
context.report(node, 'Multiple default exports.');
} else {
context.report(
node,
`Multiple exports of name '${name.replace(tsTypePrefix, '')}'.`);
}
}
}
}
} };
} };
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declare module \"eslint-plugin-import\" {}\n\nactive namespaces:\n- cannot contain a default export\n- cannot contain an export all\n- cannot contain a multi name export (export { a, b })\n- can have active namespaces nested within them\n\nambient namespaces:\n- can only be defined in .d.ts files\n- cannot be nested within active namespaces\n- have no other restrictions\n*/\n\nconst rootProgram = 'root'\nconst tsTypePrefix = 'type:'\n\n/**\n * Detect function overloads like:\n * ```ts\n * export function foo(a: number);\n * export function foo(a: string);\n * export function foo(a: number|string) { return a; }\n * ```\n * @param {Set<Object>} nodes\n * @returns {boolean}\n */\nfunction isTypescriptFunctionOverloads(nodes) {\n  const types = new Set(Array.from(nodes, node => node.parent.type))\n  return (\n    types.has('TSDeclareFunction') &&\n    (\n      types.size === 1 ||\n      (types.size === 2 && types.has('FunctionDeclaration'))\n    )\n  )\n}\n\nmodule.exports = {\n  meta: {\n    type: 'problem',\n    docs: {\n      url: docsUrl('export'),\n    },\n    schema: [],\n  },\n\n  create: function (context) {\n    const namespace = new Map([[rootProgram, new Map()]])\n\n    function addNamed(name, node, parent, isType) {\n      if (!namespace.has(parent)) {\n        namespace.set(parent, new Map())\n      }\n      const named = namespace.get(parent)\n\n      const key = isType ? `${tsTypePrefix}${name}` : name\n      let nodes = named.get(key)\n\n      if (nodes == null) {\n        nodes = new Set()\n        named.set(key, nodes)\n      }\n\n      nodes.add(node)\n    }\n\n    function getParent(node) {\n      if (node.parent && node.parent.type === 'TSModuleBlock') {\n        return node.parent.parent\n      }\n\n      // just in case somehow a non-ts namespace export declaration isn't directly\n      // parented to the root Program node\n      return rootProgram\n    }\n\n    return {\n      'ExportDefaultDeclaration': (node) => addNamed('default', node, getParent(node)),\n\n      'ExportSpecifier': (node) => addNamed(node.exported.name, node.exported, getParent(node)),\n\n      'ExportNamedDeclaration': function (node) {\n        if (node.declaration == null) return\n\n        const parent = getParent(node)\n        // support for old TypeScript versions\n        const isTypeVariableDecl = node.declaration.kind === 'type'\n\n        if (node.declaration.id != null) {\n          if (includes([\n            'TSTypeAliasDeclaration',\n            'TSInterfaceDeclaration',\n          ], node.declaration.type)) {\n            addNamed(node.declaration.id.name, node.declaration.id, parent, true)\n          } else {\n            addNamed(node.declaration.id.name, node.declaration.id, parent, isTypeVariableDecl)\n          }\n        }\n\n        if (node.declaration.declarations != null) {\n          for (let declaration of node.declaration.declarations) {\n            recursivePatternCapture(declaration.id, v =>\n              addNamed(v.name, v, parent, isTypeVariableDecl))\n          }\n        }\n      },\n\n      'ExportAllDeclaration': function (node) {\n        if (node.source == null) return // not sure if this is ever true\n\n        // `export * as X from 'path'` does not conflict\n        if (node.exported && node.exported.name) return\n\n        const remoteExports = ExportMap.get(node.source.value, context)\n        if (remoteExports == null) return\n\n        if (remoteExports.errors.length) {\n          remoteExports.reportErrors(context, node)\n          return\n        }\n\n        const parent = getParent(node)\n\n        let any = false\n        remoteExports.forEach((v, name) =>\n          name !== 'default' &&\n          (any = true) && // poor man's filter\n          addNamed(name, node, parent))\n\n        if (!any) {\n          context.report(\n            node.source,\n            `No named exports found in module '${node.source.value}'.`\n          )\n        }\n      },\n\n      'Program:exit': function () {\n        for (let [, named] of namespace) {\n          for (let [name, nodes] of named) {\n            if (nodes.size <= 1) continue\n\n            if (isTypescriptFunctionOverloads(nodes)) continue\n\n            for (let node of nodes) {\n              if (name === 'default') {\n                context.report(node, 'Multiple default exports.')\n              } else {\n                context.report(\n                  node,\n                  `Multiple exports of name '${name.replace(tsTypePrefix, '')}'.`\n                )\n              }\n            }\n          }\n        }\n      },\n    }\n  },\n}\n"]}