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Add eslint rule for localization issues
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| // @ts-check | ||
| /******************************************************************************** | ||
| * Copyright (C) 2021 TypeFox and others. | ||
| * | ||
| * This program and the accompanying materials are made available under the | ||
| * terms of the Eclipse Public License v. 2.0 which is available at | ||
| * http://www.eclipse.org/legal/epl-2.0. | ||
| * | ||
| * This Source Code may also be made available under the following Secondary | ||
| * Licenses when the conditions for such availability set forth in the Eclipse | ||
| * Public License v. 2.0 are satisfied: GNU General Public License, version 2 | ||
| * with the GNU Classpath Exception which is available at | ||
| * https://www.gnu.org/software/classpath/license.html. | ||
| * | ||
| * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 | ||
| ********************************************************************************/ | ||
|
|
||
| const levenshtein = require('js-levenshtein'); | ||
|
|
||
| const metadata = require('@theia/core/src/common/i18n/nls.metadata.json'); | ||
| const messages = new Set(Object.values(metadata.messages) | ||
| .reduceRight((prev, curr) => prev.concat(curr), []) | ||
| .map(e => e.replace(/&&/g, ''))); | ||
|
|
||
| /** @type {import('eslint').Rule.RuleModule} */ | ||
| module.exports = { | ||
| meta: { | ||
| type: 'problem', | ||
| fixable: 'code', | ||
| docs: { | ||
| description: 'prevent incorrect use of \'nls.localize\'.', | ||
| }, | ||
| }, | ||
| create(context) { | ||
| return { | ||
| CallExpression(node) { | ||
| const callee = node.callee; | ||
| if (callee.type === 'Super') { | ||
| return; | ||
| } | ||
| const { value, byDefault, node: localizeNode } = evaluateLocalize(node); | ||
| if (value) { | ||
| if (byDefault && !messages.has(value)) { | ||
| let lowestDistance = Number.MAX_VALUE; | ||
| let lowestMessage = ''; | ||
| for (const message of messages) { | ||
| const distance = levenshtein(value, message); | ||
| if (distance < lowestDistance) { | ||
| lowestDistance = distance; | ||
| lowestMessage = message; | ||
| } | ||
| } | ||
| if (lowestMessage) { | ||
| context.report({ | ||
| node: localizeNode, | ||
| message: `'${value}' is not a valid default value. Did you mean '${lowestMessage}'?`, | ||
| fix: function (fixer) { | ||
| const updatedCall = `'${lowestMessage.replace(/'/g, "\\'")}'`; | ||
| return fixer.replaceText(localizeNode, updatedCall); | ||
| } | ||
| }); | ||
| } else { | ||
| context.report({ | ||
| node: localizeNode, | ||
| message: `'${value}' is not a valid default value.` | ||
| }); | ||
| } | ||
| } else if (!byDefault && messages.has(value)) { | ||
| context.report({ | ||
| node, | ||
| message: `'${value}' can be translated using the 'nls.localizeByDefault' function.`, | ||
| fix: function (fixer) { | ||
| const code = context.getSourceCode(); | ||
| const args = node.arguments.slice(1); | ||
| const argsCode = args.map(e => code.getText(e)).join(', '); | ||
| const updatedCall = `nls.localizeByDefault(${argsCode})`; | ||
| return fixer.replaceText(node, updatedCall); | ||
| } | ||
| }); | ||
| } | ||
| } | ||
| } | ||
| }; | ||
| function evaluateLocalize(/** @type {import('estree').CallExpression} */ node) { | ||
| const callee = node.callee; | ||
| if ('object' in callee && 'name' in callee.object && 'property' in callee && 'name' in callee.property && callee.object.name === 'nls') { | ||
| if (callee.property.name === 'localize') { | ||
| const secondArgument = node.arguments[1]; | ||
| if (secondArgument && secondArgument.type === 'Literal' && typeof secondArgument.value === 'string') { | ||
| return { | ||
| value: secondArgument.value, | ||
| byDefault: false | ||
| }; | ||
| } | ||
| } else if (callee.property.name === 'localizeByDefault') { | ||
| const firstArgument = node.arguments[0]; | ||
| if (firstArgument && firstArgument.type === 'Literal' && typeof firstArgument.value === 'string') { | ||
| return { | ||
| node: firstArgument, | ||
| value: firstArgument.value, | ||
| byDefault: true | ||
| }; | ||
| } | ||
| } | ||
| } | ||
| return {}; | ||
| } | ||
| } | ||
| }; |
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