Implemented read json courses

lib/server/titamaapi.dart

@@ -8,32 +8,11 @@ import './titamaio.dart';
 @ApiClass(version: 'v1')
 class TitamaApi {
 
-  final List<Course> _courses = new List<Course>();
+  List<Course> _courses = new List<Course>();
 
-  TitamaApi() {
-    // example course, to remove once the database connection is implemented
-    Course course = new Course();
-    course
-      ..title = "UlmAPI"
-      ..time = "18:00"
-      ..day = "Monday"
-      ..id = 0
-      ..kind = "Lab"
-      ..place = "O27/343"
-      ..prof = ""
-      ..turnin = "";
-    _courses.add(course);
-    Course course2 = new Course();
-    course2
-      ..title = "CCC Ulm"
-      ..time = "20:00"
-      ..day = "Monday"
-      ..id = 1
-      ..kind = "Meeting"
-      ..place = "Cafe Einstein"
-      ..prof = ""
-      ..turnin = "";
-    _courses.add(course2);
+  TitamaApi(List<Course> courses) {
+    // assign saved courses to list
+    _courses = courses;
   }
 
   @ApiMethod(path: 'courses')
@@ -84,4 +63,3 @@ class TitamaApi {
     return course;
   }
 }
-

lib/server/titamaio.dart

@@ -2,6 +2,7 @@ library titama.io;
 
 import 'dart:io';
 import 'dart:convert';
+import 'dart:async';
 
 import '../common/messages.dart';
 
@@ -13,7 +14,7 @@ class TitamaIo {
   final _filename = "./data.json";
 
   /**
-   * Write courses as JSON in a file.k
+   * Write courses as JSON in a file.
    * @param List<Courses> _course List of courses to save.
    */
   writeJson(List<Course> _courses) async {
@@ -21,4 +22,28 @@ class TitamaIo {
     await new File(_filename).writeAsString(_json);
   }
 
+  /**
+   * Read a saved json file.
+   * @return Future<List<Course>> future with list of courses.
+   */
+  Future<List<Course>> readJson() async {
+    List<Course> courses = new List<Course>();
+
+    File data =  new File(_filename);
+
+    if (await data.exists()) {
+
+      String _content = await data.readAsString();
+      Map parsed = JSON.decode(_content);
+
+
+      for (int i = 0; i < parsed.length; i++) {
+        courses.add(new Course.fromJson(parsed[i]));
+      }
+
+    }
+
+    return courses;
+  }
+
 }