New rule: classMemberNoDefaultAccess. Disallows public access modifie…

…rs that are not explicit in the class

src/rules/classMemberNoDefaultAccessRule.ts

@@ -0,0 +1,69 @@
+/*
+ * Copyright 2013 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.
+*/
+
+export class Rule extends Lint.Rules.AbstractRule {
+    public apply(sourceFile: ts.SourceFile): Lint.RuleFailure[] {
+        return this.applyWithWalker(new MemberAccessWalker(sourceFile, this.getOptions()));
+    }
+}
+
+interface IModifiers {
+    hasAccessModifier: boolean;
+}
+
+function getModifiers(modifiers?: ts.ModifiersArray): IModifiers {
+    var modifierStrings: string[] = [];
+    if (modifiers != null) {
+        modifierStrings = modifiers.map((x) => {
+            return x.getText();
+        });
+    }
+
+    var hasAccessModifier = modifierStrings.indexOf("public") !== -1;
+    hasAccessModifier = hasAccessModifier || modifierStrings.indexOf("private") !== -1;
+    hasAccessModifier = hasAccessModifier || modifierStrings.indexOf("protected") !== -1;
+
+    return {
+        hasAccessModifier: hasAccessModifier
+    };
+}
+
+export class MemberAccessWalker extends Lint.RuleWalker {
+    constructor(sourceFile: ts.SourceFile, options: Lint.IOptions) {
+        super(sourceFile, options);
+    }
+
+    public visitMethodDeclaration(node: ts.MethodDeclaration): void {
+        this.checkModifiers(node, getModifiers(node.modifiers));
+        super.visitMethodDeclaration(node);
+    }
+
+    public visitPropertyDeclaration(node: ts.PropertyDeclaration): void {
+        this.checkModifiers(node, getModifiers(node.modifiers));
+        super.visitPropertyDeclaration(node);
+    }
+
+    private checkModifiers(node: ts.Node, current: IModifiers): void {
+        if (!this.followsRules(current)) {
+            var message = "Default access modifier on member/method not allowed";
+            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), message));
+        }
+    }
+
+    private followsRules(current: IModifiers): boolean {
+        return current.hasAccessModifier;
+    }
+}

test/files/rules/classmembernodefaultaccess.test.ts

@@ -0,0 +1,18 @@
+class Foo {
+    constructor() {        
+    }
+
+    public w: number;
+    private x: number;
+    protected y: number;
+    z: number;
+
+    public barW(): any {        
+    }
+    private barX(): any {     
+    }
+    protected barY(): any {        
+    }
+    barZ(): any {        
+    }
+}

test/rules/classMemberNoDefaultAccessTest.ts

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2013 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.
+ */
+
+/// <reference path='../references.ts' />
+
+describe("<class-member-no-default-access>", () => {
+    it("disallow default access on member", () => {
+        var fileName = "rules/classmembernodefaultaccess.test.ts";
+        var ClassMemberNoDefaultAccess = Lint.Test.getRule("class-member-no-default-access");
+        var actualFailures = Lint.Test.applyRuleOnFile(fileName, ClassMemberNoDefaultAccess, []);
+
+        Lint.Test.assertFailuresEqual(actualFailures, [
+            Lint.Test.createFailure(fileName, [8, 5], [8, 15],
+                "Default access modifier on member/method not allowed"),
+            Lint.Test.createFailure(fileName, [16, 5], [17, 6],
+                "Default access modifier on member/method not allowed")
+        ]);
+    });
+});