feat(check): add module of check in

modules/checkin/client/checkin.client.module.js

@@ -0,0 +1,9 @@
+(function (app) {
+  'use strict';
+
+  app.registerModule('checkin', ['core']);// The core module is required for special route handling; see /core/client/config/core.client.routes
+  app.registerModule('checkin.admin', ['core.admin']);
+  app.registerModule('checkin.admin.routes', ['core.admin.routes']);
+  app.registerModule('checkin.services');
+  app.registerModule('checkin.routes', ['ui.router', 'core.routes', 'checkin.services']);
+}(ApplicationConfiguration));

modules/checkin/server/config/checkin.server.config.js

@@ -0,0 +1,14 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+var path = require('path'),
+  config = require(path.resolve('./config/config'));
+
+/**
+ * Module init function.
+ */
+module.exports = function (app, db) {
+
+};

modules/checkin/server/models/check.server.model.js

@@ -0,0 +1,30 @@
+'use strict';
+
+/**
+ * Module dependencies
+ */
+var mongoose = require('mongoose'),
+  Schema = mongoose.Schema;
+
+/**
+ * Check in Schema
+ */
+var CheckSchema = new Schema({
+  user: {
+    type: Schema.Types.ObjectId,
+    ref: 'User'
+  },
+  keepDays: {
+    type: Number,
+    default: 0
+  },
+  lastCheckedAt: {
+    type: Date,
+    default: Date.now
+  }
+}, {usePushEach: true});
+
+
+CheckSchema.index({user: 1, createdAt: -1});
+
+mongoose.model('Check', CheckSchema);