Support dot notation in variable names (#30)

* Support dot notation in variable names

import?abc.def.ghi=>1
=> var abc = {};
   abc.def = {};
   abc.def.ghi = 1;

import?window.jQuery=jquery
=> var window = {};
   window.jQuery = require("jquery");

* Removed unnecessary append syntax

* Special handling of "window" name

Dot notation involving window is handled slightly different
to not overwriting window properties

import?window.jQuery=jquery
=> window = (window || {});
   window.jQuery = require("jquery");

* Added mocha and tests for nested imports

* Dont overwrite existing globals (removed special handling of 'window')

Nested imports will not overwrite top level globals. Eg.

    import?abc.def=1

is compiled to

    var abc = (abc || {});
    abc.def = 1;

* Removed redundant tests

index.js

@@ -25,6 +25,20 @@ module.exports = function(content, sourceMap) {
 		if(name === "this") {
 			imports.push("(function() {");
 			postfixes.unshift("}.call(" + value + "));");
+		} else if(name.indexOf(".") !== -1) {
+			name.split(".").reduce(function(previous, current, index, names) {
+				var expr = previous + current;
+
+				if(previous.length === 0) {
+					imports.push("var " + expr + " = (" + current + " || {});");
+				} else if(index < names.length-1) {
+					imports.push(expr + " = {};");
+				} else {
+					imports.push(expr + " = " + value + ";");
+				}
+
+				return previous + current + ".";
+			}, "");
 		} else {
 			imports.push("var " + name + " = " + value + ";");
 		}

package.json

@@ -3,10 +3,17 @@
   "version": "0.6.5",
   "author": "Tobias Koppers @sokra",
   "description": "imports loader module for webpack",
+  "scripts": {
+    "test": "mocha"
+  },
   "dependencies": {
     "loader-utils": "0.2.x",
     "source-map": "0.1.x"
   },
+  "devDependencies": {
+    "mocha": "^3.1.2",
+    "should": "^11.1.1"
+  },
   "license": "MIT",
   "repository": {
     "type": "git",

test/test.js

@@ -0,0 +1,31 @@
+var should = require("should");
+var loader = require("../");
+
+var HEADER = "/*** IMPORTS FROM imports-loader ***/\n";
+
+describe("loader", function() {
+	it("should import nested objects", function() {
+		loader.call({
+			query: "?abc.def.ghi=>1"
+		}, "").should.be.eql(HEADER +
+			"var abc = (abc || {});\n" +
+			"abc.def = {};\n" +
+			"abc.def.ghi = 1;\n\n\n"
+		);
+	});
+
+	it("should import multiple nested objects", function() {
+		loader.call({
+			query: "?abc.def.ghi=>1,foo.bar.baz=>2"
+		}, "").should.be.eql(HEADER +
+			// First import
+			"var abc = (abc || {});\n" +
+			"abc.def = {};\n" +
+			"abc.def.ghi = 1;\n" +
+			// Second import
+			"var foo = (foo || {});\n" +
+			"foo.bar = {};\n" +
+			"foo.bar.baz = 2;\n\n\n"
+		);
+	});
+});