Add problems

Author: tusbar

lib/course.js

@@ -8,6 +8,7 @@ var utils = require('./utils');
 
 var Base = require('./base');
 var About = require('./about');
+var Problem = require('./problem');
 
 // ## //
 
@@ -321,6 +322,19 @@ var Course = Base.extend({
                 return self._saveAboutFields();
             })
             .return(this);
+    },
+
+    listProblems: function () {
+        var _id =  this._get('_id');
+
+        return models.Problem
+            .findAsync({
+                '_id.org': _id.org,
+                '_id.course': _id.course
+            })
+            .then(function (problems) {
+                return problems.map(Problem.load);
+            });
     }
 });
 

lib/models/index.js

@@ -10,17 +10,19 @@ var CourseSchema = require('./course');
 var AboutSchema = require('./about');
 var ChapterSchema = require('./chapter');
 var SequentialSchema = require('./sequential');
+var ProblemSchema = require('./problem');
 
 // ## //
 
-var Module, Course, About, Chapter, Sequential;
+var Module, Course, About, Chapter, Sequential, Problem;
 
 var setup = function (connection) {
     Module = connection.model('Module', ModuleSchema);
     Course = Module.discriminator('course', CourseSchema);
     About = Module.discriminator('about', AboutSchema);
     Chapter = Module.discriminator('chapter', ChapterSchema);
     Sequential = Module.discriminator('sequential', SequentialSchema);
+    Problem = Module.discriminator('problem', ProblemSchema);
 };
 
 // ## //
@@ -32,3 +34,4 @@ exports.__defineGetter__('Course',      function () { return Course; });
 exports.__defineGetter__('About',       function () { return About; });
 exports.__defineGetter__('Chapter',     function () { return Chapter; });
 exports.__defineGetter__('Sequential',  function () { return Sequential; });
+exports.__defineGetter__('Problem',     function () { return Problem; });

lib/models/problem.js

@@ -0,0 +1,21 @@
+'use strict';
+
+var ModuleSchema = require('./module');
+
+// ## //
+
+var ProblemSchema = ModuleSchema.extend({
+    metadata: {
+        markdown: String,
+        'max_attempts': Number
+    },
+    definition: {
+        data: {
+            data: String
+        }
+    }
+});
+
+// ## //
+
+module.exports = ProblemSchema;

lib/problem.js

@@ -0,0 +1,73 @@
+'use strict';
+
+var Base = require('./base');
+var models = require('./models');
+
+// ## //
+
+/*
+** Constructor
+*/
+
+var Problem = Base.extend({
+    initialize: function (model) {
+        this._model = model || new models.Problem();
+    },
+
+    /*
+    ** Attributes
+    */
+
+    attributes: {
+        xml: {
+            get: function () {
+                return this._get('definition.data.data');
+            },
+            set: function (value) {
+                return this._set('definition.data.data', value);
+            }
+        },
+
+        input: {
+            get: function () {
+                return this._get('metadata.markdown');
+            },
+            set: function (value) {
+                return this._set('metadata.markdown', value);
+            }
+        },
+
+        attempts: {
+            get: function () {
+                return this._get('metadata.max_attempts');
+            },
+            set: function (value) {
+                return this._set('metadata.max_attempts', value);
+            }
+
+        }
+    }
+});
+
+Problem.load = function (model, parent) {
+    var problem = new Problem(model);
+    problem.parent = parent;
+    return problem;
+};
+
+Problem.get = function (id, options) {
+    return models.Problem
+        .findOneAsync({
+            '_id.name': id
+        })
+        .then(function (model) {
+            if (model) {
+                return Problem.load(model, null, options);
+            }
+            return null;
+        });
+};
+
+// ## //
+
+module.exports = Problem;