Add missing file

src/subject-manager.vala

@@ -0,0 +1,119 @@
+public class SubjectManager : Object {
+    private static Once<SubjectManager> instance;
+    public static SubjectManager get_default () {
+        return instance.once (() => new SubjectManager ());
+    }
+
+    public HashTable<string, Subject> subjects;
+
+    construct {
+        subjects = new HashTable<string, Subject> (str_hash, str_equal);
+    }
+
+    public void write_to_file (File file, string write_data) {
+        uint8[] write_bytes = (uint8[]) write_data.to_utf8 ();
+
+        try {
+            file.replace_contents (write_bytes, null, false, FileCreateFlags.NONE, null, null);
+        } catch (Error e) {
+            print (e.message);
+        }
+    }
+
+
+
+
+    public string read_from_file (File file)
+    {
+        try {
+            string file_content = "";
+            uint8[] contents;
+            string etag_out;
+
+
+            file.load_contents (null, out contents, out etag_out);
+
+            file_content = (string) contents;
+
+            return file_content;
+        } catch (Error e) {
+            print ("Error: %s\n", e.message);
+        }
+        return "-1";
+    }
+
+
+    public void read_data () {
+        for (int i = 0; i < 20 && FileUtils.test (Environment.get_user_data_dir () + @"/gradebook/savedata/subjectsave$i", FileTest.EXISTS); i++) {
+            File file = File.new_for_path (Environment.get_user_data_dir () + @"/gradebook/savedata/subjectsave$i");
+
+            var parser = new SubjectParser ();
+            Subject sub = parser.to_object (read_from_file (file));
+            subjects[sub.name] = sub;
+        }
+    }
+
+    public void write_data () {
+        int z = 0;
+        File dir = File.new_for_path (Environment.get_user_data_dir () + "/gradebook/savedata/");
+        if (!dir.query_exists ()) {
+            try {
+                dir.make_directory_with_parents ();
+            } catch (Error e) {
+                print (e.message);
+            }
+        }
+        int i = 0;
+        foreach (var subject in subjects.get_values ()) {
+            var parser = new SubjectParser ();
+            File file = File.new_for_path (Environment.get_user_data_dir () + @"/gradebook/savedata/subjectsave$i");
+            //TODO: Delete old files
+            write_to_file (file, parser.to_string (subject));
+            z = i + 1;
+            i++;
+        }
+    }
+
+
+
+    // public void new_grade (int index, string grade, string note, int c) {
+    //     bool worked = false;
+
+    //     for (int i = 0; i < subjects[index].grades.length; i++) {
+    //         if (subjects[index].grades[i] == null) {
+    //             subjects[index].grades[i] = new Grade (grade, note, c);
+    //             i = subjects[index].grades.length;
+    //             worked = true;
+    //         }
+    //     }
+
+
+    //     if (worked == false) {
+    //         print ("no more grades available");
+    //     } else {
+    //         window_grade_rows_ui (index);
+    //     }
+    // }
+
+
+
+
+    public void new_subject (string name, Category[] c) {
+        bool worked = false;
+
+        subjects[name] = new Subject (name);
+    }
+
+    // public void delete_grade (int sub_index, int gra_index) {
+    //     subjects[sub_index].grades[gra_index] = null;
+
+
+    //     for (int i = gra_index; i < subjects[sub_index].grades.length - 1; i++) {
+    //         subjects[sub_index].grades[i] = subjects[sub_index].grades[i + 1];
+    //     }
+
+    //     subjects[sub_index].grades[subjects[sub_index].grades.length - 1] = null;
+
+    //     window_grade_rows_ui (sub_index);
+    // }
+}