add linting (and some initial fixes)

1 files changed, 79 insertions, 0 deletions

diff --git a/node_modules/tslint/lib/rules/restrictPlusOperandsRule.js b/node_modules/tslint/lib/rules/restrictPlusOperandsRule.js
new file mode 100644
index 000000000..229d170be
--- /dev/null
+++ b/node_modules/tslint/lib/rules/restrictPlusOperandsRule.js
@@ -0,0 +1,79 @@
+"use strict";
+/**
+ * @license
+ * Copyright 2016 Palantir Technologies, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+var tslib_1 = require("tslib");
+var tsutils_1 = require("tsutils");
+var ts = require("typescript");
+var Lint = require("../index");
+var Rule = (function (_super) {
+    tslib_1.__extends(Rule, _super);
+    function Rule() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Rule.prototype.applyWithProgram = function (sourceFile, program) {
+        return this.applyWithFunction(sourceFile, function (ctx) { return walk(ctx, program); });
+    };
+    return Rule;
+}(Lint.Rules.TypedRule));
+/* tslint:disable:object-literal-sort-keys */
+Rule.metadata = {
+    ruleName: "restrict-plus-operands",
+    description: "When adding two variables, operands must both be of type number or of type string.",
+    optionsDescription: "Not configurable.",
+    options: null,
+    optionExamples: [true],
+    type: "functionality",
+    typescriptOnly: false,
+    requiresTypeInfo: true,
+};
+/* tslint:enable:object-literal-sort-keys */
+Rule.INVALID_TYPES_ERROR = "Operands of '+' operation must either be both strings or both numbers";
+exports.Rule = Rule;
+function walk(ctx, program) {
+    return ts.forEachChild(ctx.sourceFile, function cb(node) {
+        if (tsutils_1.isBinaryExpression(node) && node.operatorToken.kind === ts.SyntaxKind.PlusToken) {
+            var tc = program.getTypeChecker();
+            var leftType = getBaseTypeOfLiteralType(tc.getTypeAtLocation(node.left));
+            var rightType = getBaseTypeOfLiteralType(tc.getTypeAtLocation(node.right));
+            if (leftType === "invalid" || rightType === "invalid" || leftType !== rightType) {
+                return ctx.addFailureAtNode(node, Rule.INVALID_TYPES_ERROR);
+            }
+        }
+        return ts.forEachChild(node, cb);
+    });
+}
+function getBaseTypeOfLiteralType(type) {
+    if (Lint.isTypeFlagSet(type, ts.TypeFlags.StringLiteral) || Lint.isTypeFlagSet(type, ts.TypeFlags.String)) {
+        return "string";
+    }
+    else if (Lint.isTypeFlagSet(type, ts.TypeFlags.NumberLiteral) || Lint.isTypeFlagSet(type, ts.TypeFlags.Number)) {
+        return "number";
+    }
+    else if (tsutils_1.isUnionType(type) && !Lint.isTypeFlagSet(type, ts.TypeFlags.Enum)) {
+        var types = type.types.map(getBaseTypeOfLiteralType);
+        return allSame(types) ? types[0] : "invalid";
+    }
+    else if (Lint.isTypeFlagSet(type, ts.TypeFlags.EnumLiteral)) {
+        // Compatibility for TypeScript pre-2.4, which used EnumLiteralType instead of LiteralType
+        getBaseTypeOfLiteralType(type.baseType);
+    }
+    return "invalid";
+}
+function allSame(array) {
+    return array.every(function (value) { return value === array[0]; });
+}