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
145 lines (111 loc) • 19 kB
JavaScript
;
var _ignore = require('eslint-module-utils/ignore');
var _moduleVisitor = require('eslint-module-utils/moduleVisitor');var _moduleVisitor2 = _interopRequireDefault(_moduleVisitor);
var _resolve = require('eslint-module-utils/resolve');var _resolve2 = _interopRequireDefault(_resolve);
var _path = require('path');var _path2 = _interopRequireDefault(_path);
var _docsUrl = require('../docsUrl');var _docsUrl2 = _interopRequireDefault(_docsUrl);function _interopRequireDefault(obj) {return obj && obj.__esModule ? obj : { default: obj };}
/**
* convert a potentially relative path from node utils into a true
* relative path.
*
* ../ -> ..
* ./ -> .
* .foo/bar -> ./.foo/bar
* ..foo/bar -> ./..foo/bar
* foo/bar -> ./foo/bar
*
* @param relativePath {string} relative posix path potentially missing leading './'
* @returns {string} relative posix path that always starts with a ./
**/
function toRelativePath(relativePath) {
const stripped = relativePath.replace(/\/$/g, ''); // Remove trailing /
return (/^((\.\.)|(\.))($|\/)/.test(stripped) ? stripped : `./${stripped}`);
} /**
* @fileOverview Ensures that there are no useless path segments
* @author Thomas Grainger
*/function normalize(fn) {return toRelativePath(_path2.default.posix.normalize(fn));
}
function countRelativeParents(pathSegments) {
return pathSegments.reduce((sum, pathSegment) => pathSegment === '..' ? sum + 1 : sum, 0);
}
module.exports = {
meta: {
type: 'suggestion',
docs: {
url: (0, _docsUrl2.default)('no-useless-path-segments') },
fixable: 'code',
schema: [
{
type: 'object',
properties: {
commonjs: { type: 'boolean' },
noUselessIndex: { type: 'boolean' } },
additionalProperties: false }] },
create(context) {
const currentDir = _path2.default.dirname(context.getFilename());
const options = context.options[0];
function checkSourceValue(source) {const
importPath = source.value;
function reportWithProposedPath(proposedPath) {
context.report({
node: source,
// Note: Using messageIds is not possible due to the support for ESLint 2 and 3
message: `Useless path segments for "${importPath}", should be "${proposedPath}"`,
fix: fixer => proposedPath && fixer.replaceText(source, JSON.stringify(proposedPath)) });
}
// Only relative imports are relevant for this rule --> Skip checking
if (!importPath.startsWith('.')) {
return;
}
// Report rule violation if path is not the shortest possible
const resolvedPath = (0, _resolve2.default)(importPath, context);
const normedPath = normalize(importPath);
const resolvedNormedPath = (0, _resolve2.default)(normedPath, context);
if (normedPath !== importPath && resolvedPath === resolvedNormedPath) {
return reportWithProposedPath(normedPath);
}
const fileExtensions = (0, _ignore.getFileExtensions)(context.settings);
const regexUnnecessaryIndex = new RegExp(
`.*\\/index(\\${Array.from(fileExtensions).join('|\\')})?$`);
// Check if path contains unnecessary index (including a configured extension)
if (options && options.noUselessIndex && regexUnnecessaryIndex.test(importPath)) {
const parentDirectory = _path2.default.dirname(importPath);
// Try to find ambiguous imports
if (parentDirectory !== '.' && parentDirectory !== '..') {
for (let fileExtension of fileExtensions) {
if ((0, _resolve2.default)(`${parentDirectory}${fileExtension}`, context)) {
return reportWithProposedPath(`${parentDirectory}/`);
}
}
}
return reportWithProposedPath(parentDirectory);
}
// Path is shortest possible + starts from the current directory --> Return directly
if (importPath.startsWith('./')) {
return;
}
// Path is not existing --> Return directly (following code requires path to be defined)
if (resolvedPath === undefined) {
return;
}
const expected = _path2.default.relative(currentDir, resolvedPath); // Expected import path
const expectedSplit = expected.split(_path2.default.sep); // Split by / or \ (depending on OS)
const importPathSplit = importPath.replace(/^\.\//, '').split('/');
const countImportPathRelativeParents = countRelativeParents(importPathSplit);
const countExpectedRelativeParents = countRelativeParents(expectedSplit);
const diff = countImportPathRelativeParents - countExpectedRelativeParents;
// Same number of relative parents --> Paths are the same --> Return directly
if (diff <= 0) {
return;
}
// Report and propose minimal number of required relative parents
return reportWithProposedPath(
toRelativePath(
importPathSplit.
slice(0, countExpectedRelativeParents).
concat(importPathSplit.slice(countImportPathRelativeParents + diff)).
join('/')));
}
return (0, _moduleVisitor2.default)(checkSourceValue, options);
} };
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stripped : `./${stripped}`\n}\n\nfunction normalize(fn) {\n  return toRelativePath(path.posix.normalize(fn))\n}\n\nfunction countRelativeParents(pathSegments) {\n  return pathSegments.reduce((sum, pathSegment) => pathSegment === '..' ? sum + 1 : sum, 0)\n}\n\nmodule.exports = {\n  meta: {\n    type: 'suggestion',\n    docs: {\n      url: docsUrl('no-useless-path-segments'),\n    },\n\n    fixable: 'code',\n\n    schema: [\n      {\n        type: 'object',\n        properties: {\n          commonjs: { type: 'boolean' },\n          noUselessIndex: { type: 'boolean' },\n        },\n        additionalProperties: false,\n      },\n    ],\n  },\n\n  create(context) {\n    const currentDir = path.dirname(context.getFilename())\n    const options = context.options[0]\n\n    function checkSourceValue(source) {\n      const { value: importPath } = source\n\n      function reportWithProposedPath(proposedPath) {\n        context.report({\n          node: source,\n          // Note: Using messageIds is not possible due to the support for ESLint 2 and 3\n          message: `Useless path segments for \"${importPath}\", should be \"${proposedPath}\"`,\n          fix: fixer => proposedPath && fixer.replaceText(source, JSON.stringify(proposedPath)),\n        })\n      }\n\n      // Only relative imports are relevant for this rule --> Skip checking\n      if (!importPath.startsWith('.')) {\n        return\n      }\n\n      // Report rule violation if path is not the shortest possible\n      const resolvedPath = resolve(importPath, context)\n      const normedPath = normalize(importPath)\n      const resolvedNormedPath = resolve(normedPath, context)\n      if (normedPath !== importPath && resolvedPath === resolvedNormedPath) {\n        return reportWithProposedPath(normedPath)\n      }\n\n      const fileExtensions = getFileExtensions(context.settings)\n      const regexUnnecessaryIndex = new RegExp(\n        `.*\\\\/index(\\\\${Array.from(fileExtensions).join('|\\\\')})?$`\n      )\n\n      // Check if path contains unnecessary index (including a configured extension)\n      if (options && options.noUselessIndex && regexUnnecessaryIndex.test(importPath)) {\n        const parentDirectory = path.dirname(importPath)\n\n        // Try to find ambiguous imports\n        if (parentDirectory !== '.' && parentDirectory !== '..') {\n          for (let fileExtension of fileExtensions) {\n            if (resolve(`${parentDirectory}${fileExtension}`, context)) {\n              return reportWithProposedPath(`${parentDirectory}/`)\n            }\n          }\n        }\n\n        return reportWithProposedPath(parentDirectory)\n      }\n\n      // Path is shortest possible + starts from the current directory --> Return directly\n      if (importPath.startsWith('./')) {\n        return\n      }\n\n      // Path is not existing --> Return directly (following code requires path to be defined)\n      if (resolvedPath === undefined) {\n        return\n      }\n\n      const expected = path.relative(currentDir, resolvedPath) // Expected import path\n      const expectedSplit = expected.split(path.sep) // Split by / or \\ (depending on OS)\n      const importPathSplit = importPath.replace(/^\\.\\//, '').split('/')\n      const countImportPathRelativeParents = countRelativeParents(importPathSplit)\n      const countExpectedRelativeParents = countRelativeParents(expectedSplit)\n      const diff = countImportPathRelativeParents - countExpectedRelativeParents\n\n      // Same number of relative parents --> Paths are the same --> Return directly\n      if (diff <= 0) {\n        return\n      }\n\n      // Report and propose minimal number of required relative parents\n      return reportWithProposedPath(\n        toRelativePath(\n          importPathSplit\n            .slice(0, countExpectedRelativeParents)\n            .concat(importPathSplit.slice(countImportPathRelativeParents + diff))\n            .join('/')\n        )\n      )\n    }\n\n    return moduleVisitor(checkSourceValue, options)\n  },\n}\n"]}