From 857d89066ff93c78991869c8ede3548789477817 Mon Sep 17 00:00:00 2001
From: Louis Chatriot <louis.chatriot@gmail.com>
Date: Tue, 19 Aug 2014 23:29:10 +0200
Subject: [PATCH] Externalized ensureFileDoesntExist

---
 browser-version/browser-specific/lib/storage.js | 10 ++++++++++
 lib/customUtils.js                              |  5 ++---
 lib/persistence.js                              | 10 ++++++++++
 package.json                                    |  2 +-
 4 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/browser-version/browser-specific/lib/storage.js b/browser-version/browser-specific/lib/storage.js
index 210ee67..be3a2aa 100644
--- a/browser-version/browser-specific/lib/storage.js
+++ b/browser-version/browser-specific/lib/storage.js
@@ -70,11 +70,21 @@ function readFile (filename, options, callback) {
 }
 
 
+function unlink (filenqme, callback) {
+  if (typeof localStorage === 'undefined') { console.log("WARNING - This browser doesn't support localStorage, no data will be saved in NeDB!"); return callback(); }
+
+  localStorage.removeItem(filename);
+  return callback();
+}
+
+
+
 // Interface
 module.exports.exists = exists;
 module.exports.rename = rename;
 module.exports.writeFile = writeFile;
 module.exports.appendFile = appendFile;
 module.exports.readFile = readFile;
+module.exports.unlink = unlink;
 
 
diff --git a/lib/customUtils.js b/lib/customUtils.js
index 4d15f48..53109a2 100644
--- a/lib/customUtils.js
+++ b/lib/customUtils.js
@@ -18,9 +18,6 @@ function uid (len) {
 }
 
 
-/**
- * Callback signature: err
- */
 function ensureFileDoesntExist (file, callback) {
   fs.exists(file, function (exists) {
     if (!exists) { return callback(null); }
@@ -30,5 +27,7 @@ function ensureFileDoesntExist (file, callback) {
 }
 
 
+// Interface
 module.exports.uid = uid;
 module.exports.ensureFileDoesntExist = ensureFileDoesntExist;
+
diff --git a/lib/persistence.js b/lib/persistence.js
index b080db7..4007b6d 100644
--- a/lib/persistence.js
+++ b/lib/persistence.js
@@ -16,6 +16,16 @@ var fs = require('fs')
   ;
 
 
+// Helper
+function ensureFileDoesntExist (file, callback) {
+  storage.exists(file, function (exists) {
+    if (!exists) { return callback(null); }
+    
+    storage.unlink(file, function (err) { return callback(err); });
+  });
+}
+
+
 /**
  * Create a new Persistence object for database options.db
  * @param {Datastore} options.db
diff --git a/package.json b/package.json
index 6d1110a..0d08b5a 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   },
   "browser": {
     "./lib/customUtils.js": "./browser-version/browser-specific/lib/customUtils.js",
-    "./lib/persistence.js": "./browser-version/browser-specific/lib/persistence.js"
+    "./lib/storage.js": "./browser-version/browser-specific/lib/storage.js"
   },
   "main": "index",
   "licence": "MIT"