Uninstall (#100)

* Created uninstall script

* Updated json file to call uninstall script

nativescript-theme-core.json

@@ -10,6 +10,7 @@
     "url": "https://github.com/NativeScript/theme"
   },
   "scripts": {
-    "postinstall": "node scripts/postinstall.js"
+    "postinstall": "node scripts/postinstall.js",
+	"uninstall": "node scripts/uninstall.js"
   }
 }

scripts/builder.js

@@ -38,6 +38,9 @@ copyFile("./nativescript-theme-core.json", "./nativescript-theme-core/package.js
 // Copy our Post Install Script
 copyFile("./scripts/postinstall.js", "./nativescript-theme-core/scripts/postinstall.js");
 
+// Copy our Un-install 
+copyFile("./scripts/uninstall.js", "./nativescript-theme-core/scripts/uninstall.js");
+
 // Copy our Readme
 copyFile("./nativescript-theme-core.md", "./nativescript-theme-core/readme.md");
 

scripts/uninstall.js

@@ -0,0 +1,125 @@
+/*************************************************************************************
+ * Licensed under the APACHE license
+ *
+ * Version 0.0.1                                         [email protected]
+ ************************************************************************************/
+"use strict";
+
+// Simple require statements, built into node
+var fs = require('fs');
+var path = require('path');
+var os = require('os');
+
+// Do we have detect SCSS support
+var hasSCSS = false;
+
+// Get our Paths
+var cwd = process.cwd() + '/';
+var primaryDir = path.normalize(cwd+"../../");
+var appDir = primaryDir + 'app/';
+
+// Test for has SCSS support
+try {
+    var data = require(primaryDir + "package.json");
+
+    if (data && (data.devDependencies && data.devDependencies['nativescript-dev-sass']) || (data.dependencies && data.dependencies['nativescript-dev-sass']) ) {
+        hasSCSS = true;
+    }
+} catch (err) {
+    hasSCSS = false;
+}
+
+
+// ------------------------------------------------------
+// Handle the CSS files
+// ------------------------------------------------------
+
+deleteFolder(cwd+"css", appDir+"css");
+
+// Update our main app.css to delete the import the theme
+if (fs.existsSync(appDir+"app.css")) {
+    var BOM='';
+    var cssData = fs.readFileSync(appDir + "app.css").toString();
+
+
+	// Search for only our themes
+	var idx = cssData.indexOf("@import '~/css/core.light.css';");
+	if (idx === -1) {
+		idx = cssData.indexOf("@import '~/css/core.dark.css';");
+	}
+
+    if (idx !== -1) {
+		var idxOffset = cssData.indexOf(";", idx)+1;
+		if (idx === 0) {		
+		  cssData = cssData.substring(idxOffset, cssData.length);	
+		} else {
+		  cssData = cssData.substring(0, idx)+cssData.substring(idxOffset, cssData.length);
+		}		
+        fs.writeFileSync(appDir + "app.css", cssData.trim());
+    }
+}
+
+// ------------------------------------------------------
+// Handle the font files
+// ------------------------------------------------------
+deleteFolder(cwd+"fonts", appDir+"fonts");
+
+// ------------------------------------------------------
+// Handle the SCSS files
+// ------------------------------------------------------
+
+if (hasSCSS) {
+	var extraFiles=["_bootstrap-map.scss", "core.dark.android.scss", "core.dark.ios.scss", "core.light.android.scss", "core.light.ios.scss"];
+	deleteFolder(cwd+"theme-core-scss", appDir+"theme-core-scss");
+
+	for (var i=0;i<extraFiles.length;i++) {
+		if (fs.existsSync(appDir+extraFiles[i])) {
+			try {
+				fs.unlinkSync(appDir+extraFiles[i]);
+			} catch (err) {
+				console.log("Unable to uninstall ", appDir + extraFiles[i]);
+			}
+		}
+	}
+
+}
+
+
+// -------------------------------------------------------
+// Support Functions
+// -------------------------------------------------------
+
+/**
+ * This deletes a folder and recurses if needed
+ * @param src (string) - Source folder
+ * @param dest (string) - Destination folder
+ */
+function deleteFolder(src, dest) {
+
+    // No source/dest Folder exists, don't delete it!
+    if (!fs.existsSync(src)) { return false; }
+	if (!fs.existsSync(dest)) { return false; }
+
+    var files = fs.readdirSync(src);
+    files.forEach(function(file){
+        var curPath = src + "/" + file;
+        if(fs.lstatSync(curPath).isDirectory()) { // check to see if we need to recurse
+            deleteFolder(curPath, dest + "/" + file);
+        } else if (fs.existsSync(dest +"/"+file)) {
+			try {
+				fs.unlinkSync(dest+"/"+file);
+			} catch (err) {
+				console.log("Unable to uninstall ", dest+"/"+file);
+			}
+		}		           
+    });
+
+	// Clear the folder, will fail if not empty	
+	try {
+	  fs.rmdirSync(dest);
+	} catch (err) {
+		console.log("Unable to delete: ", dest);
+	}
+
+    return true;
+}