[pbxProject] first pass at #hasFile method

Author: alunny

AUTHORS

@@ -3,3 +3,4 @@ Anis Kadri (@imhotep)
 Mike Reinstein (@mreinstein)
 Filip Maj (@filmaj)
 Brett Rudd (@goya)
+Bob Easterday (@bobeast)

lib/pbxProject.js

@@ -85,8 +85,13 @@ pbxProject.prototype.addPluginFile = function (path, opt) {
     var file = new pbxFile(path, opt);
 
     file.plugin = true; // durr
-
     correctForPluginsPath(file, this);
+
+    // null is better for early errors
+    if (this.hasFile(file.path)) {
+        return null;
+    }
+
     file.fileRef = this.generateUuid();
 
     this.addToPbxFileReferenceSection(file);    // PBXFileReference
@@ -465,6 +470,22 @@ pbxProject.prototype.__defineGetter__("productName", function () {
     }
 });
 
+// check if file is present
+pbxProject.prototype.hasFile = function (filePath) {
+    var files = nonComments(this.pbxFileReferenceSection()),
+        file, id;
+
+    for (id in files) {
+        file = files[id];
+
+        if (file.path == filePath) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
 // helper recursive prop search+replace
 function propReplace(obj, prop, value) {
     for (var p in obj) {

test/pbxProject.js

@@ -164,3 +164,22 @@ exports['productName field'] = {
         test.done();
     }
 }
+
+exports['hasFile'] = {
+    'should return true if the file is in the project': function (test) {
+        var newProj = new pbx('.');
+        newProj.hash = jsonProject;
+
+        //  sourceTree: '"<group>"'
+        test.ok(newProj.hasFile('AppDelegate.m'))
+        test.done()
+    },
+    'should return false if the file is not in the project': function (test) {
+        var newProj = new pbx('.');
+        newProj.hash = jsonProject;
+
+        //  sourceTree: '"<group>"'
+        test.ok(!newProj.hasFile('NotTheAppDelegate.m'))
+        test.done()
+    }
+}