split classes into separate files

1 files changed, 38 insertions, 0 deletions

diff --git a/src/com.example.portfolio2/com/example/portfolio2/Model.java b/src/com.example.portfolio2/com/example/portfolio2/Model.java
new file mode 100644
index 0000000..950b4f4
--- /dev/null
+++ b/src/com.example.portfolio2/com/example/portfolio2/Model.java
@@ -0,0 +1,38 @@
+package com.example.portfolio2;
+
+import java.util.ArrayList;
+
+class Model{ // The model handles all interactions with the database
+    MyDB db=new MyDB();
+    Model(){}
+    void initialize() { // When running the program, it clears the participation database
+        clearParticipation();
+    }
+    int getActivityIndeks(String name) { // Returns the integer value of the activity's index
+        if(name ==null) return -1;
+        ArrayList<String> result = db.query("select indeks from activity a where name is '"+name+"';", "indeks");
+        return Integer.parseInt(result.getFirst());
+
+    }
+    void addParticipation(int activityIndex) { // Inserts the given activity into participation using the activity's index
+        db.cmd("insert into participation values(123, "+activityIndex+");");
+    }
+    ArrayList<String> getParticipation(String program) { // Returns all activity names from activities currently in participation
+        return db.query("select name from participation p inner join activity a on p.indeks = a.indeks where program is '" + program + "';", "name");
+    }
+    void clearParticipation() { // Removes all entries in the participation database
+        db.cmd("delete from participation");
+    }
+    ArrayList<String> selectProgram(String program) { // Returns an arraylist of activities within the given program
+        return db.query("select name from activity where program is '" + program + "';", "name");
+    }
+    String getSumEcts(String program){ // Returns the sum of ECTS points under the given category from the student as a string
+        if(program==null)return "0";
+        ArrayList<String> result = db.query("select sum(activity.ects) as total_ects,student.name from student left outer join participation on student.studid = participation.studid inner join activity on participation.indeks = activity.indeks where program is '"+program+"' group by student.studid ;", "total_ects");
+        if (result.isEmpty()) return "0";
+        return result.getFirst();
+    }
+    ArrayList<String> getAllActivities() {
+        return db.query("select name from activity;", "name");
+    }
+}