src/main/java/nl/andrewlalis/Main.java

@@ -1,5 +1,6 @@
 package nl.andrewlalis;
 
+import nl.andrewlalis.model.Organization;
 import nl.andrewlalis.model.database.Database;
 import nl.andrewlalis.ui.control.command.CommandExecutor;
 import nl.andrewlalis.ui.control.command.executables.ArchiveRepos;
@@ -31,13 +32,17 @@ public class Main {
         // Command executor which will be used by all actions the user can do.
         CommandExecutor executor = new CommandExecutor();
 
+        // Main application model.
+        Organization organization = new Organization();
+
         // Initialize User Interface.
-        InitializerApp app = new InitializerApp(executor);
+        InitializerApp app = new InitializerApp(executor, organization);
         app.begin();
         app.setAccessToken(userOptions.get("token"));
 
         Database db = new Database("database/initializer.sqlite");
 
+
         executor.registerCommand("read_students", new ReadStudentsFileToDB(db));
         executor.registerCommand("archive_all", new ArchiveRepos());
         executor.registerCommand("generate_assignments", new GenerateAssignmentsRepo());

src/main/java/nl/andrewlalis/model/Organization.java

@@ -0,0 +1,46 @@
+package nl.andrewlalis.model;
+
+import com.sun.org.apache.xpath.internal.operations.Or;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This class represents the overarching model container for the entire application, and holds in memory all student
+ * teams created, teaching assistant teams, and any other state information that would be needed by the user interface
+ * or runtime executables.
+ */
+public class Organization {
+
+    /**
+     * A list of all student teams in this organization. This is generated from a CSV file supplied after many students
+     * have filled in a Google form.
+     */
+    private List<StudentTeam> studentTeams;
+
+    /**
+     * Constructs a new Organization object with all instance variables initialized to empty values.
+     */
+    public Organization() {
+        this.studentTeams = new ArrayList<>();
+    }
+
+    /**
+     * Determines if there are student teams available.
+     * @return True if there is at least one student team, or false otherwise.
+     */
+    public boolean hasStudentTeams() {
+        return this.studentTeams.isEmpty();
+    }
+
+    // GETTERS
+    public List<StudentTeam> getStudentTeams() {
+        return this.studentTeams;
+    }
+
+    // SETTERS
+    public void setStudentTeams(List<StudentTeam> teams) {
+        this.studentTeams = teams;
+    }
+
+}

src/main/java/nl/andrewlalis/model/StudentTeam.java

@@ -1,5 +1,7 @@
 package nl.andrewlalis.model;
 
+import org.kohsuke.github.GHRepository;
+
 import java.util.Arrays;
 
 /**
@@ -7,6 +9,16 @@ import java.util.Arrays;
  */
 public class StudentTeam extends Team{
 
+    /**
+     * The repository belonging to this team.
+     */
+    private GHRepository repository;
+
+    /**
+     * The TATeam responsible for this student team.
+     */
+    private TATeam taTeam;
+
     public StudentTeam() {
         super(-1);
     }
@@ -24,16 +36,19 @@ public class StudentTeam extends Team{
      * A team is valid if and only if:
      *      - The student count is equal to the team size.
      *      - Each student is unique.
-     *      - Each student's preferred partners match all the others.
+     *      - Each student's preferred partners match all the others, or a student has no preferences.
      * @param teamSize The preferred size of teams.
      * @return True if the team is valid, and false otherwise.
      */
     public boolean isValid(int teamSize) {
         if (this.memberCount() == teamSize) {
             for (Student studentA : this.getStudents()) {
-                for (Student studentB : this.getStudents()) {
-                    if (!studentA.equals(studentB) && !studentA.getPreferredPartners().contains(studentB.getNumber())) {
-                        return false;
+                // If the student doesn't have an preferred partners, then assume that this is valid.
+                if (!studentA.getPreferredPartners().isEmpty()) {
+                    for (Student studentB : this.getStudents()) {
+                        if (!studentA.equals(studentB) && !studentA.getPreferredPartners().contains(studentB.getNumber())) {
+                            return false;
+                        }
                     }
                 }
             }
@@ -73,4 +88,20 @@ public class StudentTeam extends Team{
         }
         return sb.toString();
     }
+
+    public GHRepository getRepository() {
+        return this.repository;
+    }
+
+    public void setRepository(GHRepository repo) {
+        this.repository = repo;
+    }
+
+    public TATeam getTaTeam() {
+        return this.taTeam;
+    }
+
+    public void setTaTeam(TATeam team) {
+        this.taTeam = team;
+    }
 }

src/main/java/nl/andrewlalis/model/database/Database.java

@@ -82,7 +82,7 @@ public class Database {
      * @param personType The type of person to store, using a constant defined above.
      * @return True if successful, false otherwise.
      */
-    private boolean storePerson(Person person, int personType) {
+    public boolean insertPerson(Person person, int personType) {
         try {
             logger.finest("Storing person: " + person);
             String sql = "INSERT INTO persons (id, name, email_address, github_username, person_type_id) VALUES (?, ?, ?, ?, ?);";
@@ -92,113 +92,31 @@ public class Database {
             stmt.setString(3, person.getEmailAddress());
             stmt.setString(4, person.getGithubUsername());
             stmt.setInt(5, personType);
-            stmt.execute();
-            return true;
+            return stmt.execute();
         } catch (SQLException e) {
             logger.severe("SQLException while inserting Person: " + person + '\n' + e.getMessage());
             return false;
         }
     }
 
-    /**
-     * Stores a teaching assistant without a team.
-     * @param ta The teaching assistant to store.
-     * @return True if successful, false otherwise.
-     */
-    public boolean storeTeachingAssistant(TeachingAssistant ta) {
-        return this.storeTeachingAssistant(ta, TEAM_NONE);
-    }
-
-    /**
-     * Stores a teaching assistant in the database.
-     * @param ta The teaching assistant to store.
-     * @param teamId The teaching assistant's team id.
-     * @return True if successful, false otherwise.
-     */
-    public boolean storeTeachingAssistant(TeachingAssistant ta, int teamId) {
-        if (!storePerson(ta, PERSON_TYPE_TA)) {
-            return false;
-        }
-        try {
-            String sql = "INSERT INTO teaching_assistants (person_id, team_id) VALUES (?, ?);";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, ta.getNumber());
-            stmt.setInt(2, teamId);
-            stmt.execute();
-            return true;
-        } catch (SQLException e) {
-            logger.severe("SQL Exception while inserting TeachingAssistant.\n" + e.getMessage());
-            e.printStackTrace();
-            return false;
-        }
-    }
-
-    /**
-     * Stores a team in the database.
-     * @param team The team to store.
-     * @param type The type of team that this is.
-     * @return True if successful, false otherwise.
-     */
-    public boolean storeTeam(Team team, int type) {
-        try {
-            String sql = "INSERT INTO teams (id, team_type_id) VALUES (?, ?);";
-            PreparedStatement stmt = this.connection.prepareStatement(sql);
-            stmt.setInt(1, team.getId());
-            stmt.setInt(2, type);
-            stmt.execute();
-            return true;
-        } catch (SQLException e) {
-            logger.severe("SQLException while inserting team: " + team + '\n' + e.getMessage());
-            return false;
-        }
-    }
-
-    /**
-     * Stores a list of student teams in the database.
-     * @param teams The list of teams to store.
-     * @return True if successful, or false if an error occurred.
-     */
-    public boolean storeStudentTeams(List<StudentTeam> teams) {
-        for (StudentTeam team : teams) {
-            if (!this.storeTeam(team, TEAM_TYPE_STUDENT)) {
-                return false;
-            }
-            for (Student student : team.getStudents()) {
-                if (!this.storeStudent(student, team.getId())) {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-
-    /**
-     * Stores a student without a team.
-     * @param student The student to store.
-     * @return True if successful, false otherwise.
-     */
-    public boolean storeStudent(Student student) {
-        return this.storeStudent(student, TEAM_NONE);
-    }
-
     /**
      * Stores a student in the database.
      * @param student The student to store.
-     * @param teamId The team id for the team the student is in.
      * @return True if the operation was successful, false otherwise.
      */
-    public boolean storeStudent(Student student, int teamId) {
+    public boolean insertStudent(Student student) {
         logger.finest("Storing student: " + student);
-        if (!storePerson(student, PERSON_TYPE_STUDENT)) {
+        if (!insertPerson(student, PERSON_TYPE_STUDENT)) {
             return false;
         }
         try {
-            String sql = "INSERT INTO students (person_id, team_id, chose_partner) VALUES (?, ?, ?);";
+            String sql = "INSERT INTO students (person_id, chose_partner) VALUES (?, ?);";
             PreparedStatement stmt = this.connection.prepareStatement(sql);
             stmt.setInt(1, student.getNumber());
-            stmt.setInt(2, teamId);
-            stmt.setInt(3, student.getPreferredPartners().size() > 0 ? 1 : 0);
-            stmt.execute();
+            stmt.setInt(2, student.getPreferredPartners().size() > 0 ? 1 : 0);
+            if (!stmt.execute()) {
+                return false;
+            }
             // Storing partners.
             String sqlPartner = "INSERT INTO student_preferred_partners (student_id, partner_id) VALUES (?, ?);";
             PreparedStatement stmtPartner = this.connection.prepareStatement(sqlPartner);
@@ -215,6 +133,93 @@ public class Database {
         }
     }
 
+    /**
+     * Stores a teaching assistant in the database.
+     * @param ta The teaching assistant to store.
+     * @return True if successful, false otherwise.
+     */
+    public boolean insertTeachingAssistant(TeachingAssistant ta) {
+        if (!insertPerson(ta, PERSON_TYPE_TA)) {
+            return false;
+        }
+        try {
+            String sql = "INSERT INTO teaching_assistants (person_id) VALUES (?);";
+            PreparedStatement stmt = this.connection.prepareStatement(sql);
+            stmt.setInt(1, ta.getNumber());
+            stmt.execute();
+            return true;
+        } catch (SQLException e) {
+            logger.severe("SQL Exception while inserting TeachingAssistant.\n" + e.getMessage());
+            e.printStackTrace();
+            return false;
+        }
+    }
+
+    /**
+     * Stores a team in the database, and any persons who do not yet exist.
+     * @param team The team to store.
+     * @param type The type of team that this is.
+     * @param personType The type of people that this team is made of.
+     * @return True if successful, false otherwise.
+     */
+    public boolean insertTeam(Team team, int type, int personType) {
+        try {
+            String sql = "INSERT INTO teams (id, team_type_id) VALUES (?, ?);";
+            PreparedStatement stmt = this.connection.prepareStatement(sql);
+            stmt.setInt(1, team.getId());
+            stmt.setInt(2, type);
+            if (stmt.execute()) {
+                for (Person p : team.getMembers()) {
+                    this.insertPerson(p, personType);
+                    String sqlMembers = "INSERT INTO team_members (team_id, person_id) VALUES (?, ?);";
+                    PreparedStatement stmtMembers = this.connection.prepareStatement(sqlMembers);
+                    stmtMembers.setInt(1, team.getId());
+                    stmtMembers.setInt(2, p.getNumber());
+                    stmtMembers.execute();
+                }
+            }
+            return true;
+        } catch (SQLException e) {
+            logger.severe("SQLException while inserting team: " + team + '\n' + e.getMessage());
+            return false;
+        }
+    }
+
+    /**
+     * Stores a student team in the database.
+     * @param team The team to store.
+     * @return True if successful, false otherwise.
+     */
+    public boolean insertStudentTeam(StudentTeam team) {
+        if (!this.insertTeam(team, TEAM_TYPE_STUDENT, PERSON_TYPE_STUDENT)) {
+            return false;
+        }
+        try {
+            String sql = "INSERT INTO student_teams (team_id, repository_name, teaching_assistant_team_id) VALUES (?, ?, ?);";
+            PreparedStatement stmt = this.connection.prepareStatement(sql);
+            stmt.setInt(1, team.getId());
+            stmt.setString(2, (team.getRepository() == null) ? null : team.getRepository().getName());
+            stmt.setInt(3, (team.getTaTeam() == null) ? TEAM_NONE : team.getTaTeam().getId());
+            return stmt.execute();
+        } catch (SQLException e) {
+            logger.severe("SQLException while inserting student team: " + team + '\n' + e.getMessage());
+            e.printStackTrace();
+            return false;
+        }
+    }
+
+    /**
+     * Stores a list of student teams in the database.
+     * @param teams The list of teams to store.
+     * @return True if successful, or false if an error occurred.
+     */
+    public boolean storeStudentTeams(List<StudentTeam> teams) {
+        for (StudentTeam team : teams) {
+            this.insertStudentTeam(team);
+        }
+        return true;
+    }
+
     /**
      * Retrieves a list of preferred partners that each student has set.
      * @param studentId The student id to search by.

src/main/java/nl/andrewlalis/ui/view/InitializerApp.java

@@ -1,11 +1,15 @@
 package nl.andrewlalis.ui.view;
 
+import com.sun.org.apache.xpath.internal.operations.Or;
+import nl.andrewlalis.model.Organization;
+import nl.andrewlalis.model.StudentTeam;
 import nl.andrewlalis.ui.control.OutputTextHandler;
 import nl.andrewlalis.ui.control.command.CommandExecutor;
 import nl.andrewlalis.ui.control.listeners.*;
 
 import javax.swing.*;
 import java.awt.*;
+import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -37,8 +41,22 @@ public class InitializerApp extends JFrame {
      */
     private CommandExecutor executor;
 
-    public InitializerApp(CommandExecutor executor) {
+    /**
+     * The organization object, which contains all important state information.
+     */
+    private Organization organization;
+
+    /**
+     * Constructs a new instance of the main application frame, with both an executor, and organization model.
+     *
+     * @param executor The command executor, which is passed to any action listeners, so that buttons in this interface
+     *                 may execute commands in the same way that the command line can.
+     * @param organization A reference to the application's organization model, which holds all important runtime state
+     *                     information.
+     */
+    public InitializerApp(CommandExecutor executor, Organization organization) {
         this.executor = executor;
+        this.organization = organization;
 
         // UI initialization.
         ImageIcon icon = new ImageIcon(getClass().getResource("/image/icon.png"));

src/main/resources/sql/table_init.sql

@@ -43,7 +43,7 @@ CREATE TABLE IF NOT EXISTS teams (
 );
 
 CREATE TABLE IF NOT EXISTS team_members (
-  id INTEGER PRIMARY KEY,
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
   team_id INTEGER NOT NULL,
   person_id INTEGER NOT NULL,
   FOREIGN KEY (team_id)
@@ -69,7 +69,6 @@ CREATE TABLE IF NOT EXISTS teaching_assistant_teams (
 CREATE TABLE IF NOT EXISTS student_teams (
   team_id INTEGER PRIMARY KEY,
   repository_name TEXT,
-  group_id INTEGER NOT NULL UNIQUE,
   teaching_assistant_team_id INTEGER,
   FOREIGN KEY (team_id)
     REFERENCES teams(id)