1 files changed, 123 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/lib/rules/no-alert.js b/tools/node_modules/eslint/lib/rules/no-alert.js
new file mode 100644
index 0000000000..bc1087253b
--- /dev/null
+++ b/tools/node_modules/eslint/lib/rules/no-alert.js
@@ -0,0 +1,123 @@
+/**
+ * @fileoverview Rule to flag use of alert, confirm, prompt
+ * @author Nicholas C. Zakas
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const getPropertyName = require("../ast-utils").getStaticPropertyName;
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+/**
+ * Checks if the given name is a prohibited identifier.
+ * @param {string} name The name to check
+ * @returns {boolean} Whether or not the name is prohibited.
+ */
+function isProhibitedIdentifier(name) {
+    return /^(alert|confirm|prompt)$/.test(name);
+}
+
+/**
+ * Reports the given node and identifier name.
+ * @param {RuleContext} context The ESLint rule context.
+ * @param {ASTNode} node The node to report on.
+ * @param {string} identifierName The name of the identifier.
+ * @returns {void}
+ */
+function report(context, node, identifierName) {
+    context.report(node, "Unexpected {{name}}.", { name: identifierName });
+}
+
+/**
+ * Finds the eslint-scope reference in the given scope.
+ * @param {Object} scope The scope to search.
+ * @param {ASTNode} node The identifier node.
+ * @returns {Reference|null} Returns the found reference or null if none were found.
+ */
+function findReference(scope, node) {
+    const references = scope.references.filter(reference => reference.identifier.range[0] === node.range[0] &&
+            reference.identifier.range[1] === node.range[1]);
+
+    if (references.length === 1) {
+        return references[0];
+    }
+    return null;
+}
+
+/**
+ * Checks if the given identifier node is shadowed in the given scope.
+ * @param {Object} scope The current scope.
+ * @param {string} node The identifier node to check
+ * @returns {boolean} Whether or not the name is shadowed.
+ */
+function isShadowed(scope, node) {
+    const reference = findReference(scope, node);
+
+    return reference && reference.resolved && reference.resolved.defs.length > 0;
+}
+
+/**
+ * Checks if the given identifier node is a ThisExpression in the global scope or the global window property.
+ * @param {Object} scope The current scope.
+ * @param {string} node The identifier node to check
+ * @returns {boolean} Whether or not the node is a reference to the global object.
+ */
+function isGlobalThisReferenceOrGlobalWindow(scope, node) {
+    if (scope.type === "global" && node.type === "ThisExpression") {
+        return true;
+    }
+    if (node.name === "window") {
+        return !isShadowed(scope, node);
+    }
+
+    return false;
+}
+
+//------------------------------------------------------------------------------
+// Rule Definition
+//------------------------------------------------------------------------------
+
+module.exports = {
+    meta: {
+        docs: {
+            description: "disallow the use of `alert`, `confirm`, and `prompt`",
+            category: "Best Practices",
+            recommended: false
+        },
+
+        schema: []
+    },
+
+    create(context) {
+        return {
+            CallExpression(node) {
+                const callee = node.callee,
+                    currentScope = context.getScope();
+
+                // without window.
+                if (callee.type === "Identifier") {
+                    const identifierName = callee.name;
+
+                    if (!isShadowed(currentScope, callee) && isProhibitedIdentifier(callee.name)) {
+                        report(context, node, identifierName);
+                    }
+
+                } else if (callee.type === "MemberExpression" && isGlobalThisReferenceOrGlobalWindow(currentScope, callee.object)) {
+                    const identifierName = getPropertyName(callee);
+
+                    if (isProhibitedIdentifier(identifierName)) {
+                        report(context, node, identifierName);
+                    }
+                }
+
+            }
+        };
+
+    }
+};