Started on node.js+socket.io+mongoDB on the backend for more responsivnes

server/node_modules/mongodb/lib/utils.js

@@ -0,0 +1,233 @@
+"use strict";
+
+var MongoError = require('mongodb-core').MongoError
+
+var shallowClone = function(obj) {
+  var copy = {};
+  for(var name in obj) copy[name] = obj[name];
+  return copy;
+}
+
+// Set simple property
+var getSingleProperty = function(obj, name, value) {
+  Object.defineProperty(obj, name, {
+    enumerable:true,
+    get: function() {
+      return value 
+    }
+  });  
+}
+
+var formatSortValue = exports.formatSortValue = function(sortDirection) {
+  var value = ("" + sortDirection).toLowerCase();
+
+  switch (value) {
+    case 'ascending':
+    case 'asc':
+    case '1':
+      return 1;
+    case 'descending':
+    case 'desc':
+    case '-1':
+      return -1;
+    default:
+      throw new Error("Illegal sort clause, must be of the form "
+                    + "[['field1', '(ascending|descending)'], "
+                    + "['field2', '(ascending|descending)']]");
+  }
+};
+
+var formattedOrderClause = exports.formattedOrderClause = function(sortValue) {
+  var orderBy = {};
+  if(sortValue == null) return null;
+  if (Array.isArray(sortValue)) {
+    if(sortValue.length === 0) {
+      return null;
+    }
+
+    for(var i = 0; i < sortValue.length; i++) {
+      if(sortValue[i].constructor == String) {
+        orderBy[sortValue[i]] = 1;
+      } else {
+        orderBy[sortValue[i][0]] = formatSortValue(sortValue[i][1]);
+      }      
+    }
+  } else if(sortValue != null && typeof sortValue == 'object') {
+    orderBy = sortValue;
+  } else if (typeof sortValue == 'string') {
+    orderBy[sortValue] = 1;
+  } else {
+    throw new Error("Illegal sort clause, must be of the form " +
+      "[['field1', '(ascending|descending)'], ['field2', '(ascending|descending)']]");
+  }
+
+  return orderBy;
+};
+
+var checkCollectionName = function checkCollectionName (collectionName) {
+  if('string' !== typeof collectionName) {
+    throw Error("collection name must be a String");
+  }
+
+  if(!collectionName || collectionName.indexOf('..') != -1) {
+    throw Error("collection names cannot be empty");
+  }
+
+  if(collectionName.indexOf('$') != -1 &&
+      collectionName.match(/((^\$cmd)|(oplog\.\$main))/) == null) {
+    throw Error("collection names must not contain '$'");
+  }
+
+  if(collectionName.match(/^\.|\.$/) != null) {
+    throw Error("collection names must not start or end with '.'");
+  }
+
+  // Validate that we are not passing 0x00 in the colletion name
+  if(!!~collectionName.indexOf("\x00")) {
+    throw new Error("collection names cannot contain a null character");
+  }
+};
+
+var handleCallback = function(callback, err, value1, value2) {
+  try {
+    if(callback == null) return;
+    if(value2) return callback(err, value1, value2);
+    return callback(err, value1);
+  } catch(err) {
+    process.nextTick(function() { throw err; });
+    return false;
+  }
+
+  return true;
+}
+
+/**
+ * Wrap a Mongo error document in an Error instance
+ * @ignore
+ * @api private
+ */
+var toError = function(error) {
+  if (error instanceof Error) return error;
+
+  var msg = error.err || error.errmsg || error.errMessage || error;
+  var e = new MongoError(msg);
+
+  // Get all object keys
+  var keys = typeof error == 'object'
+    ? Object.keys(error)
+    : [];
+
+  for(var i = 0; i < keys.length; i++) {
+    e[keys[i]] = error[keys[i]];
+  }
+
+  return e;
+}
+
+/**
+ * @ignore
+ */
+var normalizeHintField = function normalizeHintField(hint) {
+  var finalHint = null;
+
+  if(typeof hint == 'string') {
+    finalHint = hint;
+  } else if(Array.isArray(hint)) {
+    finalHint = {};
+
+    hint.forEach(function(param) {
+      finalHint[param] = 1;
+    });  
+  } else if(hint != null && typeof hint == 'object') {
+    finalHint = {};
+    for (var name in hint) {
+      finalHint[name] = hint[name];
+    }    
+  }
+
+  return finalHint;
+};
+
+/**
+ * Create index name based on field spec
+ *
+ * @ignore
+ * @api private
+ */
+var parseIndexOptions = function(fieldOrSpec) {
+  var fieldHash = {};
+  var indexes = [];
+  var keys;
+
+  // Get all the fields accordingly
+  if('string' == typeof fieldOrSpec) {
+    // 'type'
+    indexes.push(fieldOrSpec + '_' + 1);
+    fieldHash[fieldOrSpec] = 1;
+  } else if(Array.isArray(fieldOrSpec)) {
+    fieldOrSpec.forEach(function(f) {
+      if('string' == typeof f) {
+        // [{location:'2d'}, 'type']
+        indexes.push(f + '_' + 1);
+        fieldHash[f] = 1;
+      } else if(Array.isArray(f)) {
+        // [['location', '2d'],['type', 1]]
+        indexes.push(f[0] + '_' + (f[1] || 1));
+        fieldHash[f[0]] = f[1] || 1;
+      } else if(isObject(f)) {
+        // [{location:'2d'}, {type:1}]
+        keys = Object.keys(f);
+        keys.forEach(function(k) {
+          indexes.push(k + '_' + f[k]);
+          fieldHash[k] = f[k];
+        });
+      } else {
+        // undefined (ignore)
+      }
+    });
+  } else if(isObject(fieldOrSpec)) {
+    // {location:'2d', type:1}
+    keys = Object.keys(fieldOrSpec);
+    keys.forEach(function(key) {
+      indexes.push(key + '_' + fieldOrSpec[key]);
+      fieldHash[key] = fieldOrSpec[key];
+    });
+  }
+
+  return {
+    name: indexes.join("_"), keys: keys, fieldHash: fieldHash
+  }
+}
+
+var isObject = exports.isObject = function (arg) {
+  return '[object Object]' == toString.call(arg)
+}
+
+var debugOptions = function(debugFields, options) {
+  var finaloptions = {};
+  debugFields.forEach(function(n) {
+    finaloptions[n] = options[n];
+  });
+
+  return finaloptions;
+}
+
+var decorateCommand = function(command, options, exclude) {
+  for(var name in options) {
+    if(exclude[name] == null) command[name] = options[name];
+  }
+
+  return command;
+}
+
+exports.shallowClone = shallowClone;
+exports.getSingleProperty = getSingleProperty;
+exports.checkCollectionName = checkCollectionName;
+exports.toError = toError;
+exports.formattedOrderClause = formattedOrderClause;
+exports.parseIndexOptions = parseIndexOptions;
+exports.normalizeHintField = normalizeHintField;
+exports.handleCallback = handleCallback;
+exports.decorateCommand = decorateCommand;
+exports.isObject = isObject;
+exports.debugOptions = debugOptions;