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slider/node_modules/eslint/lib/rules/newline-per-chained-call.js

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+/**
+ * @fileoverview Rule to ensure newline per method call when chaining calls
+ * @author Rajendra Patil
+ * @author Burak Yigit Kaya
+ * @deprecated in ESLint v8.53.0
+ */
+
+"use strict";
+
+const astUtils = require("./utils/ast-utils");
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+/** @type {import('../types').Rule.RuleModule} */
+module.exports = {
+	meta: {
+		deprecated: {
+			message: "Formatting rules are being moved out of ESLint core.",
+			url: "https://eslint.org/blog/2023/10/deprecating-formatting-rules/",
+			deprecatedSince: "8.53.0",
+			availableUntil: "10.0.0",
+			replacedBy: [
+				{
+					message:
+						"ESLint Stylistic now maintains deprecated stylistic core rules.",
+					url: "https://eslint.style/guide/migration",
+					plugin: {
+						name: "@stylistic/eslint-plugin",
+						url: "https://eslint.style",
+					},
+					rule: {
+						name: "newline-per-chained-call",
+						url: "https://eslint.style/rules/newline-per-chained-call",
+					},
+				},
+			],
+		},
+		type: "layout",
+
+		docs: {
+			description: "Require a newline after each call in a method chain",
+			recommended: false,
+			url: "https://eslint.org/docs/latest/rules/newline-per-chained-call",
+		},
+
+		fixable: "whitespace",
+
+		schema: [
+			{
+				type: "object",
+				properties: {
+					ignoreChainWithDepth: {
+						type: "integer",
+						minimum: 1,
+						maximum: 10,
+						default: 2,
+					},
+				},
+				additionalProperties: false,
+			},
+		],
+		messages: {
+			expected: "Expected line break before `{{callee}}`.",
+		},
+	},
+
+	create(context) {
+		const options = context.options[0] || {},
+			ignoreChainWithDepth = options.ignoreChainWithDepth || 2;
+
+		const sourceCode = context.sourceCode;
+
+		/**
+		 * Get the prefix of a given MemberExpression node.
+		 * If the MemberExpression node is a computed value it returns a
+		 * left bracket. If not it returns a period.
+		 * @param {ASTNode} node A MemberExpression node to get
+		 * @returns {string} The prefix of the node.
+		 */
+		function getPrefix(node) {
+			if (node.computed) {
+				if (node.optional) {
+					return "?.[";
+				}
+				return "[";
+			}
+			if (node.optional) {
+				return "?.";
+			}
+			return ".";
+		}
+
+		/**
+		 * Gets the property text of a given MemberExpression node.
+		 * If the text is multiline, this returns only the first line.
+		 * @param {ASTNode} node A MemberExpression node to get.
+		 * @returns {string} The property text of the node.
+		 */
+		function getPropertyText(node) {
+			const prefix = getPrefix(node);
+			const lines = sourceCode
+				.getText(node.property)
+				.split(astUtils.LINEBREAK_MATCHER);
+			const suffix = node.computed && lines.length === 1 ? "]" : "";
+
+			return prefix + lines[0] + suffix;
+		}
+
+		return {
+			"CallExpression:exit"(node) {
+				const callee = astUtils.skipChainExpression(node.callee);
+
+				if (callee.type !== "MemberExpression") {
+					return;
+				}
+
+				let parent = astUtils.skipChainExpression(callee.object);
+				let depth = 1;
+
+				while (parent && parent.callee) {
+					depth += 1;
+					parent = astUtils.skipChainExpression(
+						astUtils.skipChainExpression(parent.callee).object,
+					);
+				}
+
+				if (
+					depth > ignoreChainWithDepth &&
+					astUtils.isTokenOnSameLine(callee.object, callee.property)
+				) {
+					const firstTokenAfterObject = sourceCode.getTokenAfter(
+						callee.object,
+						astUtils.isNotClosingParenToken,
+					);
+
+					context.report({
+						node: callee.property,
+						loc: {
+							start: firstTokenAfterObject.loc.start,
+							end: callee.loc.end,
+						},
+						messageId: "expected",
+						data: {
+							callee: getPropertyText(callee),
+						},
+						fix(fixer) {
+							return fixer.insertTextBefore(
+								firstTokenAfterObject,
+								"\n",
+							);
+						},
+					});
+				}
+			},
+		};
+	},
+};