import homework for students

EduNetworkBuilder/NetworkBuilder.cs

@@ -1755,12 +1755,13 @@ namespace EduNetworkBuilder
                 }
                 else if (extension == ".enbh")
                 {
-                    if(NB.GetUser() == null)
+                    if(NB.GetUser() == null || CurrentUser == null)
                     {
                         MessageBox.Show(NB.Translate("NB_LoadUserFirst"));
                         return;
                     }
                     //Here we would load a homework file
+                    CurrentUser.LoadHomeworkFile(filename);
                 }
                 else
                 {

EduNetworkBuilder/PersonClass.cs

@@ -239,6 +239,19 @@ namespace EduNetworkBuilder
             return true;
         }
 
+        public bool HasHomework(SchoolworkClass ToCheck, bool compare_ID)
+        {
+            //Check to see if we already exist
+            foreach (SchoolworkClass one in Projects)
+            {
+                if (compare_ID && one.ThisID == ToCheck.ThisID)
+                    return true;
+                else if (!compare_ID && one.Name.ToLower() == ToCheck.Name.ToLower())
+                    return true;
+            }
+            return false;
+        }
+
         public bool RegisterNewlySubmittedHW(SchoolworkClass ToCheck)
         {
             //Check to see if we already exist
@@ -255,6 +268,65 @@ namespace EduNetworkBuilder
             return true;
         }
 
+        public void LoadHomeworkFile(string HomeworkFile)
+        {
+            if (!File.Exists(HomeworkFile)) return; //The file does not exist
+            if (! (Path.GetExtension(HomeworkFile).ToLower() == ".enbh")) return; //It is not a homework file
+            List<SchoolworkClass> WhatWeRead = SchoolworkClass.LoadMultiple(HomeworkFile);
+            if(WhatWeRead.Count > 0) //We have something to import
+            {
+                bool IsOK = true;
+                //Verify that all the homeworks are OK to load
+                foreach(SchoolworkClass one in WhatWeRead)
+                {
+                    //if one is already submitted, reject it
+                    if(one.IsSumbitted || one.IsGraded)
+                    {
+                        IsOK = false;
+                    }
+                }
+                //Load them
+                if(IsOK)
+                {
+                    int totalHW =0;
+                    int Skipped = 0;
+                    int imported = 0;
+                    int replaced = 0;
+                    foreach (SchoolworkClass one in WhatWeRead)
+                    {
+                        totalHW++;
+                        if(isAdmin)
+                        {
+                            //we want to prompt what to do.
+                            //Ask for each (import, skip, replace)
+                            //Ask only for duplicates
+                            //  Determine it is duplicate by comparing ID
+                            //  Determine if it is duplicate by comparing name
+                            //Never ask
+                            //  Automatically replace duplicates
+                            //  Automatically skip duplicates
+                            //  Import records but make a new ID for each puzzle
+                        }
+                        else
+                        {
+                            if(AddHomework(one))
+                            {
+                                imported++;
+                            }
+                            else
+                            {
+                                Skipped++;
+                            }
+                        }
+                    }
+                }
+                else
+                {
+                    MessageBox.Show(NB.Translate("PC_AlreadySubmittedOrGraded"));
+                }
+            }
+        }
+
         /// <summary>
         /// Organize the projects into a nice project tree.
         /// </summary>

EduNetworkBuilder/SchoolworkClass.cs

@@ -5,6 +5,7 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Xml;
 using System.IO;
+using System.Windows.Forms;
 
 namespace EduNetworkBuilder
 {
@@ -94,13 +95,35 @@ namespace EduNetworkBuilder
         public void Load(string filename)
         {
             XmlDocument xmlDoc = new XmlDocument();
+
             if (File.Exists(filename))
             {
                 xmlDoc.Load(filename);
-                Load(xmlDoc);
+                List<SchoolworkClass>  results = Load(xmlDoc);
+                if (results.Count > 0) Clone(results[0], this);
             }
         }
 
+        public static List<SchoolworkClass> LoadMultiple(string filename)
+        {
+            XmlDocument xmlDoc = new XmlDocument();
+            List<SchoolworkClass> results = new List<SchoolworkClass>();
+            if (File.Exists(filename))
+            {
+                try
+                {
+                    xmlDoc.Load(filename);
+                }
+                catch (Exception e)
+                {
+                    MessageBox.Show(e.ToString());
+                    return results;  //return an empty list
+                }
+                results.AddRange(Load(xmlDoc));
+            }
+            return results;
+        }
+
         public static List<SchoolworkClass> Load(XmlNode TheNode)
         {
             SchoolworkClass currentOne = new SchoolworkClass();