Modules

node_modules/dom-storage/lib/index.js

@@ -0,0 +1,135 @@
+// http://www.rajdeepd.com/articles/chrome/localstrg/LocalStorageSample.htm
+
+// NOTE:
+// this varies from actual localStorage in some subtle ways
+
+// also, there is no persistence
+// TODO persist
+(function () {
+  "use strict";
+
+  var fs = require('fs');
+
+  function Storage(path, opts) {
+    opts = opts || {};
+    var db;
+
+    Object.defineProperty(this, '___priv_bk___', {
+      value: {
+        path: path
+      }
+    , writable: false
+    , enumerable: false
+    });
+
+    Object.defineProperty(this, '___priv_strict___', {
+      value: !!opts.strict
+    , writable: false
+    , enumerable: false
+    });
+
+    Object.defineProperty(this, '___priv_ws___', {
+      value: opts.ws || '  '
+    , writable: false
+    , enumerable: false
+    });
+
+    try {
+      db = JSON.parse(fs.readFileSync(path));
+    } catch(e) {
+      db = {};
+    }
+
+    Object.keys(db).forEach(function (key) {
+      this[key] = db[key];
+    }, this);
+  }
+
+  Storage.prototype.getItem = function (key) {
+    if (this.hasOwnProperty(key)) {
+      if (this.___priv_strict___) {
+        return String(this[key]);
+      } else {
+        return this[key];
+      }
+    }
+    return null;
+  };
+
+  Storage.prototype.setItem = function (key, val) {
+    if (val === undefined) {
+      this[key] = null;
+    } else if (this.___priv_strict___) {
+      this[key] = String(val);
+    } else {
+      this[key] = val;
+    }
+    this.___save___();
+  };
+
+  Storage.prototype.removeItem = function (key) {
+    delete this[key];
+    this.___save___();
+  };
+
+  Storage.prototype.clear = function () {
+    var self = this;
+    // filters out prototype keys
+    Object.keys(self).forEach(function (key) {
+      self[key] = undefined;
+      delete self[key];
+    });
+  };
+
+  Storage.prototype.key = function (i) {
+    i = i || 0;
+    return Object.keys(this)[i];
+  };
+
+  Object.defineProperty(Storage.prototype, 'length', {
+    get: function() {
+      return Object.keys(this).length;
+    }
+  });
+
+  Storage.prototype.___save___ = function () {
+    var self = this;
+
+    if (!this.___priv_bk___.path) {
+      return;
+    }
+
+    if (this.___priv_bk___.lock) {
+      this.___priv_bk___.wait = true;
+      return;
+    }
+
+    this.___priv_bk___.lock = true;
+    fs.writeFile(
+      this.___priv_bk___.path
+    , JSON.stringify(this, null, this.___priv_ws___)
+    , 'utf8'
+    , function (e) {
+      self.___priv_bk___.lock = false;
+      if (e) {
+        console.error('Could not write to database', self.___priv_bk___.path);
+        console.error(e);
+        return;
+      }
+      if (self.___priv_bk___.wait) {
+        self.___priv_bk___.wait = false;
+        self.___save___();
+      }
+    });
+  };
+
+  Object.defineProperty(Storage, 'create', {
+    value: function (path, opts) {
+      return new Storage(path, opts);
+    }
+  , writable: false
+  , enumerable: false
+  });
+
+  module.exports = Storage;
+}());