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188 lines
5.3 KiB
JavaScript
188 lines
5.3 KiB
JavaScript
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/**
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* @fileoverview Rule to require object keys to be sorted
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* @author Toru Nagashima
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*/
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"use strict";
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//------------------------------------------------------------------------------
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// Requirements
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//------------------------------------------------------------------------------
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const astUtils = require("./utils/ast-utils"),
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naturalCompare = require("natural-compare");
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//------------------------------------------------------------------------------
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// Helpers
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//------------------------------------------------------------------------------
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/**
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* Gets the property name of the given `Property` node.
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*
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* - If the property's key is an `Identifier` node, this returns the key's name
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* whether it's a computed property or not.
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* - If the property has a static name, this returns the static name.
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* - Otherwise, this returns null.
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* @param {ASTNode} node The `Property` node to get.
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* @returns {string|null} The property name or null.
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* @private
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*/
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function getPropertyName(node) {
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const staticName = astUtils.getStaticPropertyName(node);
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if (staticName !== null) {
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return staticName;
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}
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return node.key.name || null;
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}
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/**
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* Functions which check that the given 2 names are in specific order.
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*
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* Postfix `I` is meant insensitive.
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* Postfix `N` is meant natural.
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* @private
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*/
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const isValidOrders = {
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asc(a, b) {
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return a <= b;
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},
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ascI(a, b) {
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return a.toLowerCase() <= b.toLowerCase();
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},
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ascN(a, b) {
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return naturalCompare(a, b) <= 0;
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},
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ascIN(a, b) {
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return naturalCompare(a.toLowerCase(), b.toLowerCase()) <= 0;
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},
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desc(a, b) {
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return isValidOrders.asc(b, a);
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},
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descI(a, b) {
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return isValidOrders.ascI(b, a);
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},
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descN(a, b) {
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return isValidOrders.ascN(b, a);
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},
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descIN(a, b) {
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return isValidOrders.ascIN(b, a);
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}
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};
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//------------------------------------------------------------------------------
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// Rule Definition
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//------------------------------------------------------------------------------
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module.exports = {
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meta: {
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type: "suggestion",
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docs: {
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description: "require object keys to be sorted",
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category: "Stylistic Issues",
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recommended: false,
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url: "https://eslint.org/docs/rules/sort-keys"
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},
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schema: [
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{
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enum: ["asc", "desc"]
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},
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{
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type: "object",
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properties: {
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caseSensitive: {
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type: "boolean",
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default: true
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},
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natural: {
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type: "boolean",
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default: false
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},
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minKeys: {
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type: "integer",
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minimum: 2,
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default: 2
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}
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},
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additionalProperties: false
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}
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],
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messages: {
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sortKeys: "Expected object keys to be in {{natural}}{{insensitive}}{{order}}ending order. '{{thisName}}' should be before '{{prevName}}'."
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}
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},
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create(context) {
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// Parse options.
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const order = context.options[0] || "asc";
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const options = context.options[1];
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const insensitive = options && options.caseSensitive === false;
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const natural = options && options.natural;
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const minKeys = options && options.minKeys;
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const isValidOrder = isValidOrders[
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order + (insensitive ? "I" : "") + (natural ? "N" : "")
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];
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// The stack to save the previous property's name for each object literals.
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let stack = null;
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return {
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ObjectExpression(node) {
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stack = {
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upper: stack,
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prevName: null,
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numKeys: node.properties.length
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};
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},
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"ObjectExpression:exit"() {
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stack = stack.upper;
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},
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SpreadElement(node) {
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if (node.parent.type === "ObjectExpression") {
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stack.prevName = null;
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}
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},
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Property(node) {
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if (node.parent.type === "ObjectPattern") {
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return;
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}
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const prevName = stack.prevName;
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const numKeys = stack.numKeys;
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const thisName = getPropertyName(node);
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if (thisName !== null) {
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stack.prevName = thisName;
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}
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if (prevName === null || thisName === null || numKeys < minKeys) {
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return;
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}
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if (!isValidOrder(prevName, thisName)) {
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context.report({
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node,
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loc: node.key.loc,
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messageId: "sortKeys",
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data: {
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thisName,
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prevName,
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order,
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insensitive: insensitive ? "insensitive " : "",
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natural: natural ? "natural " : ""
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}
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});
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}
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}
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};
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}
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};
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