104 lines
3.4 KiB
JavaScript
104 lines
3.4 KiB
JavaScript
/**
|
|
* @fileoverview Rule to ensure newline per method call when chaining calls
|
|
* @author Rajendra Patil
|
|
* @author Burak Yigit Kaya
|
|
*/
|
|
|
|
"use strict";
|
|
|
|
const astUtils = require("../ast-utils");
|
|
|
|
//------------------------------------------------------------------------------
|
|
// Rule Definition
|
|
//------------------------------------------------------------------------------
|
|
|
|
module.exports = {
|
|
meta: {
|
|
docs: {
|
|
description: "require a newline after each call in a method chain",
|
|
category: "Stylistic Issues",
|
|
recommended: false
|
|
},
|
|
fixable: "whitespace",
|
|
schema: [{
|
|
type: "object",
|
|
properties: {
|
|
ignoreChainWithDepth: {
|
|
type: "integer",
|
|
minimum: 1,
|
|
maximum: 10
|
|
}
|
|
},
|
|
additionalProperties: false
|
|
}]
|
|
},
|
|
|
|
create(context) {
|
|
|
|
const options = context.options[0] || {},
|
|
ignoreChainWithDepth = options.ignoreChainWithDepth || 2;
|
|
|
|
const sourceCode = context.getSourceCode();
|
|
|
|
/**
|
|
* 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) {
|
|
return node.computed ? "[" : ".";
|
|
}
|
|
|
|
/**
|
|
* 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) {
|
|
if (!node.callee || node.callee.type !== "MemberExpression") {
|
|
return;
|
|
}
|
|
|
|
const callee = node.callee;
|
|
let parent = callee.object;
|
|
let depth = 1;
|
|
|
|
while (parent && parent.callee) {
|
|
depth += 1;
|
|
parent = parent.callee.object;
|
|
}
|
|
|
|
if (depth > ignoreChainWithDepth && astUtils.isTokenOnSameLine(callee.object, callee.property)) {
|
|
context.report({
|
|
node: callee.property,
|
|
loc: callee.property.loc.start,
|
|
message: "Expected line break before `{{callee}}`.",
|
|
data: {
|
|
callee: getPropertyText(callee)
|
|
},
|
|
fix(fixer) {
|
|
const firstTokenAfterObject = sourceCode.getTokenAfter(callee.object, astUtils.isNotClosingParenToken);
|
|
|
|
return fixer.insertTextBefore(firstTokenAfterObject, "\n");
|
|
}
|
|
});
|
|
}
|
|
}
|
|
};
|
|
}
|
|
};
|