First commit, version 0.2.7

lib/user.js

@@ -0,0 +1,83 @@
+//user
+//external modules
+var mongoose = require('mongoose');
+
+//core
+var config = require("../config.js");
+
+// create a user model
+var model = mongoose.model('user', {
+    id: String,
+    profile: String,
+    history: String,
+    created: Date
+});
+
+//public
+var user = {
+    model: model,
+    findUser: findUser,
+    newUser: newUser,
+    findOrNewUser: findOrNewUser,
+    getUserCount: getUserCount
+};
+
+function getUserCount(callback) {
+    model.count(function(err, count){
+        if(err) callback(err, null);
+        else callback(null, count);
+    });
+}
+
+function findUser(id, callback) {
+    model.findOne({
+        id: id
+    }, function (err, user) {
+        if (err) {
+            console.log('find user failed: ' + err);
+            callback(err, null);
+        }
+        if (!err && user != null) {
+            callback(null, user);
+        } else {
+            console.log('find user failed: ' + err);
+            callback(err, null);
+        };
+    });
+}
+
+function newUser(id, profile, callback) {
+    var user = new model({
+        id: id,
+        profile: JSON.stringify(profile),
+        created: Date.now()
+    });
+    user.save(function (err) {
+        if (err) {
+            console.log('new user failed: ' + err);
+            callback(err, null);
+        } else {
+            console.log("new user success: " + user.id);
+            callback(null, user);
+        };
+    });
+}
+
+function findOrNewUser(id, profile, callback) {
+    findUser(id, function(err, user) {
+        if(err || user == null) {
+            newUser(id, profile, function(err, user) {
+                if(err) {
+                    console.log('find or new user failed: ' + err);
+                    callback(err, null);
+                } else {
+                    callback(null, user);
+                }
+            });
+        } else {
+            callback(null, user);
+        }
+    });
+}
+
+module.exports = user;