eslint-plugin-fp-ts
Version:
fp-ts ESLint rules
73 lines (72 loc) • 3.37 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var utils_1 = require("@typescript-eslint/utils");
var fp_ts_1 = require("fp-ts");
var function_1 = require("fp-ts/function");
var utils_2 = require("../utils");
exports.default = (0, utils_2.createRule)({
name: "prefer-chain",
meta: {
type: "suggestion",
fixable: "code",
hasSuggestions: true,
schema: [],
docs: {
description: "Replace map + flatten with chain",
},
messages: {
mapFlattenIsChain: "map followed by flatten can be replaced by chain",
replaceMapFlattenWithChain: "replace map and flatten with chain",
},
},
defaultOptions: [],
create: function (context) {
var isPipeOrFlowExpression = (0, utils_2.contextUtils)(context).isPipeOrFlowExpression;
return {
CallExpression: function (node) {
(0, function_1.pipe)(node, isPipeOrFlowExpression, fp_ts_1.boolean.fold(function_1.constVoid, function () {
return (0, function_1.pipe)((0, utils_2.getAdjacentCombinators)(node, {
name: /map|mapWithIndex/,
types: [utils_1.AST_NODE_TYPES.CallExpression],
}, {
name: "flatten",
types: [
utils_1.AST_NODE_TYPES.Identifier,
utils_1.AST_NODE_TYPES.MemberExpression,
],
}, true), fp_ts_1.option.bindTo("combinators"), fp_ts_1.option.bind("mapCalleeIdentifier", function (_a) {
var mapNode = _a.combinators[0];
return (0, utils_2.calleeIdentifier)(mapNode);
}), fp_ts_1.option.map(function (_a) {
var _b = _a.combinators, mapNode = _b[0], flattenNode = _b[1], mapCalleeIdentifier = _a.mapCalleeIdentifier;
var chainIndentifier = mapCalleeIdentifier.name === "mapWithIndex"
? "chainWithIndex"
: "chain";
context.report({
loc: {
start: mapNode.loc.start,
end: flattenNode.loc.end,
},
messageId: "mapFlattenIsChain",
suggest: [
{
messageId: "replaceMapFlattenWithChain",
fix: function (fixer) {
return [
fixer.remove(flattenNode),
fixer.removeRange([
mapNode.range[1],
flattenNode.range[0],
]),
fixer.replaceText(mapCalleeIdentifier, chainIndentifier),
];
},
},
],
});
}));
}));
},
};
},
});