eslint-plugin-rxjs
Version:
ESLint rules for RxJS
57 lines (56 loc) • 2.43 kB
JavaScript
;
const tslib_1 = require("tslib");
const eslint_etc_1 = require("eslint-etc");
const tsutils = tslib_1.__importStar(require("tsutils"));
const tsutils_etc_1 = require("tsutils-etc");
const ts = tslib_1.__importStar(require("typescript"));
const utils_1 = require("../utils");
const rule = (0, utils_1.ruleCreator)({
defaultOptions: [],
meta: {
docs: {
description: "Forbids unsafe optional `next` calls.",
recommended: "error",
},
fixable: undefined,
hasSuggestions: false,
messages: {
forbidden: "Unsafe optional next calls are forbidden.",
},
schema: [],
type: "problem",
},
name: "no-unsafe-subject-next",
create: (context) => {
const { esTreeNodeToTSNodeMap } = (0, eslint_etc_1.getParserServices)(context);
const { typeChecker } = (0, eslint_etc_1.getTypeServices)(context);
return {
[`CallExpression[callee.property.name='next']`]: (node) => {
if (node.arguments.length === 0 && (0, eslint_etc_1.isMemberExpression)(node.callee)) {
const type = typeChecker.getTypeAtLocation(esTreeNodeToTSNodeMap.get(node.callee.object));
if ((0, tsutils_etc_1.isReferenceType)(type) && (0, tsutils_etc_1.couldBeType)(type, "Subject")) {
const [typeArg] = typeChecker.getTypeArguments(type);
if (tsutils.isTypeFlagSet(typeArg, ts.TypeFlags.Any)) {
return;
}
if (tsutils.isTypeFlagSet(typeArg, ts.TypeFlags.Unknown)) {
return;
}
if (tsutils.isTypeFlagSet(typeArg, ts.TypeFlags.Void)) {
return;
}
if ((0, tsutils_etc_1.isUnionType)(typeArg) &&
typeArg.types.some((t) => tsutils.isTypeFlagSet(t, ts.TypeFlags.Void))) {
return;
}
context.report({
messageId: "forbidden",
node: node.callee.property,
});
}
}
},
};
},
});
module.exports = rule;