Started database support.

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

@@ -1,20 +1,19 @@
 package nl.andrewlalis;
 
+import nl.andrewlalis.database.Database;
 import nl.andrewlalis.git_api.GithubManager;
+import nl.andrewlalis.model.Student;
 import nl.andrewlalis.model.StudentTeam;
+import nl.andrewlalis.util.CommandLine;
+import nl.andrewlalis.util.FileUtils;
 import nl.andrewlalis.util.Logging;
 import nl.andrewlalis.util.TeamGenerator;
 
 import java.io.IOException;
 import java.util.List;
 import java.util.Map;
-import java.util.logging.ConsoleHandler;
-import java.util.logging.Handler;
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
-import nl.andrewlalis.util.CommandLine;
-
 /**
  * Main program entry point.
  */
@@ -28,16 +27,9 @@ public class Main {
         Map<String, String> userOptions = CommandLine.parseArgs(args);
 
         // Initialize logger.
-        ConsoleHandler handler = new ConsoleHandler();
-        handler.setLevel(Level.INFO);
         try {
             Logging.setup(true); // TODO: Replace true with command line arg.
-            Handler[] handlers = logger.getHandlers();
-            for (Handler h : handlers) {
-                logger.removeHandler(h);
-            }
-            logger.setUseParentHandlers(false);
-            logger.addHandler(handler);
+
         } catch (IOException e) {
             logger.severe("Unable to save log to file.");
         }
@@ -62,6 +54,16 @@ public class Main {
             e.printStackTrace();
         }
 
+        // Initialize database.
+        Database db = new Database("database/initializer.sqlite");
+        db.initialize();
+        for (StudentTeam team : studentTeams) {
+            for (Student student : team.getStudents()) {
+                db.storeStudent(student);
+            }
+        }
+
+
     }
 
     /**

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

@@ -0,0 +1,159 @@
+package nl.andrewlalis.database;
+
+import nl.andrewlalis.model.Person;
+import nl.andrewlalis.model.Student;
+import nl.andrewlalis.model.TeachingAssistant;
+import nl.andrewlalis.util.FileUtils;
+
+import java.sql.*;
+import java.util.logging.Logger;
+
+/**
+ * This class abstracts many of the functions needed for interaction with the application's SQLite database.
+ */
+public class Database {
+
+    private static final int PERSON_TYPE_STUDENT = 0;
+    private static final int PERSON_TYPE_TA = 1;
+
+    private static final int TEAM_TYPE_STUDENT = 0;
+    private static final int TEAM_TYPE_TA = 1;
+    private static final int TEAM_TYPE_TA_ALL = 2;
+
+    private static final int TEAM_NONE = 0;
+    private static final int TEAM_TA_ALL = 1;
+
+    private static final int ERROR_TYPE_TEAM = 0;
+    private static final int ERROR_TYPE_PERSON = 1;
+    private static final int ERROR_TYPE_SYSTEM = 2;
+
+    /**
+     * The connection needed for all queries.
+     */
+    private Connection connection;
+
+    /**
+     * The logger for outputting debug info.
+     */
+    private static final Logger logger = Logger.getLogger(Database.class.getName());
+    static {
+        logger.setParent(Logger.getGlobal());
+    }
+
+    public Database(String databaseFilename) {
+        try {
+            this.connection = DriverManager.getConnection("jdbc:sqlite:" + databaseFilename);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    /**
+     * Initializes the database from the table_init.sql script, which defines the table schema and starting data.
+     * @return True, if successful, false if not.
+     */
+    public boolean initialize() {
+        String sql = FileUtils.readStringFromFile("/sql/table_init.sql");
+        String[] commands = sql.split(";");
+        for (String command : commands) {
+            logger.finest("Executing command: " + command);
+            if (command.trim().length() > 1) {
+                try {
+                    PreparedStatement statement = this.connection.prepareStatement(command);
+                    statement.execute();
+                } catch (SQLException e) {
+                    logger.severe("SQLException: " + e.getErrorCode());
+                    return false;
+                }
+            }
+        }
+        logger.fine("Database initialized.");
+        return true;
+    }
+
+    /**
+     * Stores a person in the database.
+     * @param person The person object to store.
+     * @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) {
+        try {
+            String sql = "INSERT INTO persons (id, name, email_address, github_username, person_type_id) VALUES (?, ?, ?, ?, ?);";
+            PreparedStatement stmt = this.connection.prepareStatement(sql);
+            stmt.setInt(1, person.getNumber());
+            stmt.setString(2, person.getName());
+            stmt.setString(3, person.getEmailAddress());
+            stmt.setString(4, person.getGithubUsername());
+            stmt.setInt(5, personType);
+            return stmt.execute();
+        } catch (SQLException e) {
+            e.printStackTrace();
+            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);
+            return stmt.execute();
+        } catch (SQLException e) {
+            e.printStackTrace();
+            return false;
+        }
+    }
+
+    /**
+     * 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) {
+        if (!storePerson(student, PERSON_TYPE_STUDENT)) {
+            return false;
+        }
+        try {
+            String sql = "INSERT INTO students (person_id, team_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);
+            return stmt.execute();
+        } catch (SQLException e) {
+            e.printStackTrace();
+            return false;
+        }
+    }
+
+}

src/main/java/nl/andrewlalis/git_api/GithubManager.java

@@ -14,7 +14,6 @@ import org.kohsuke.github.*;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.Map;
 import java.util.logging.Logger;
 
 /**
@@ -206,21 +205,30 @@ public class GithubManager {
         List<GHRepository> repositories = this.organization.listRepositories().asList();
         for (GHRepository repo : repositories) {
             if (repo.getName().contains(sub)) {
-                HttpPatch patch = new HttpPatch("https://api.github.com/repos/" + repo.getFullName() + "?access_token=" + this.accessToken);
-                CloseableHttpClient client = HttpClientBuilder.create().build();
-                ObjectMapper mapper = new ObjectMapper();
-                ObjectNode root = mapper.createObjectNode();
-                root.put("archived", true);
-                String json = mapper.writeValueAsString(root);
-                patch.setEntity(new StringEntity(json));
-                HttpResponse response = client.execute(patch);
-                if (response.getStatusLine().getStatusCode() != 200) {
-                    throw new IOException("Could not archive repository: " + repo.getName() + ". Code: " + response.getStatusLine().getStatusCode());
-                }
-                logger.info("Archived repository: " + repo.getFullName());
-                // TODO: archive repository using Github Java API, instead of Apache HttpUtils.
+                archiveRepository(repo);
             }
         }
     }
 
+    /**
+     * Archives a repository so that it can no longer be manipulated.
+     * TODO: Change to using Github API instead of Apache HttpUtils.
+     * @param repo The repository to archive.
+     * @throws IOException If an error occurs with the HTTP request.
+     */
+    public void archiveRepository(GHRepository repo) throws IOException {
+        HttpPatch patch = new HttpPatch("https://api.github.com/repos/" + repo.getFullName() + "?access_token=" + this.accessToken);
+        CloseableHttpClient client = HttpClientBuilder.create().build();
+        ObjectMapper mapper = new ObjectMapper();
+        ObjectNode root = mapper.createObjectNode();
+        root.put("archived", true);
+        String json = mapper.writeValueAsString(root);
+        patch.setEntity(new StringEntity(json));
+        HttpResponse response = client.execute(patch);
+        if (response.getStatusLine().getStatusCode() != 200) {
+            throw new IOException("Could not archive repository: " + repo.getName() + ". Code: " + response.getStatusLine().getStatusCode());
+        }
+        logger.info("Archived repository: " + repo.getFullName());
+    }
+
 }

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

@@ -20,7 +20,7 @@ public class Student extends Person {
      * @param emailAddress The student's email address.
      * @param githubUsername The student's github username.
      * @param preferredPartners A list of this student's preferred partners, as a list of integers representing the
-     *                          other students' numbers.
+     * other students' numbers.
      */
     public Student(int number, String name, String emailAddress, String githubUsername, List<Integer> preferredPartners) {
         super(number, name, emailAddress, githubUsername);

src/main/java/nl/andrewlalis/util/FileUtils.java

@@ -0,0 +1,31 @@
+package nl.andrewlalis.util;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+/**
+ * Contains some methods which come in handy in lots of other places.
+ */
+public class FileUtils {
+
+    /**
+     * Reads the contents of the file specified by the filename into a String.
+     * @param filename The filename to read the file of, either relative or absolute.
+     * @return A string containing the file's contents.
+     */
+    public static String readStringFromFile(String filename) {
+        try (BufferedReader r = new BufferedReader(new InputStreamReader(FileUtils.class.getResourceAsStream(filename)))) {
+            StringBuilder sb = new StringBuilder();
+            String line;
+            while ((line = r.readLine()) != null) {
+                sb.append(line).append('\n');
+            }
+            return sb.toString();
+        } catch (IOException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+}

src/main/java/nl/andrewlalis/util/Logging.java

@@ -14,16 +14,26 @@ public class Logging {
     public static void setup(boolean verbose) throws IOException {
         Logger logger = Logger.getGlobal();
 
-        if (verbose) {
-            logger.setLevel(Level.FINEST);
-        } else {
-            logger.setLevel(Level.INFO);
+        Handler[] handlers = logger.getHandlers();
+        for (Handler h : handlers) {
+            logger.removeHandler(h);
         }
+        logger.setUseParentHandlers(false);
+
+        ConsoleHandler handler = new ConsoleHandler();
+        if (verbose) {
+            handler.setLevel(Level.FINEST);
+        } else {
+            handler.setLevel(Level.INFO);
+        }
+
+        logger.addHandler(handler);
 
         outputFile = new FileHandler("log/latest.txt");
         formatter = new SimpleFormatter();
 
         outputFile.setFormatter(formatter);
+        outputFile.setLevel(Level.FINEST);
         logger.addHandler(outputFile);
 
     }

src/main/resources/sql/insert/insert_person.sql

@@ -0,0 +1,2 @@
+INSERT INTO persons (id, name, email_address, github_username, person_type_id)
+VALUES (?, ?, ?, ?, ?);

src/main/resources/sql/table_init.sql

@@ -0,0 +1,150 @@
+PRAGMA foreign_keys = TRUE;
+PRAGMA writable_schema = 1;
+DELETE FROM sqlite_master WHERE type IN ('table', 'index', 'trigger');
+PRAGMA writable_schema = 0;
+VACUUM;
+
+-- Basic schema design.
+CREATE TABLE IF NOT EXISTS person_types (
+  id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL UNIQUE
+);
+
+INSERT INTO person_types (id, name)
+VALUES (0, 'student'),
+       (1, 'teaching-assistant'),
+       (2, 'professor');
+
+CREATE TABLE IF NOT EXISTS persons (
+  id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL,
+  email_address TEXT NOT NULL,
+  github_username TEXT NOT NULL UNIQUE,
+  person_type_id INTEGER NOT NULL,
+  FOREIGN KEY (person_type_id)
+    REFERENCES person_types(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS team_types (
+  id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL UNIQUE
+);
+
+INSERT INTO team_types (id, name)
+VALUES (0, 'student_team'),
+       (1, 'teaching_assistant_team'),
+       (2, 'all_teaching_assistants'),
+       (3, 'none');
+
+CREATE TABLE IF NOT EXISTS teams (
+  id INTEGER PRIMARY KEY AUTOINCREMENT,
+  team_type_id INTEGER NOT NULL,
+  FOREIGN KEY (team_type_id)
+    REFERENCES team_types(id)
+    ON DELETE CASCADE
+);
+
+INSERT INTO teams (id, team_type_id)
+VALUES (0, 3), -- None team for all students or TA's without a team.
+       (1, 2); -- Team for all teaching assistants.
+
+CREATE TABLE IF NOT EXISTS teaching_assistant_teams (
+  team_id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL UNIQUE,
+  FOREIGN KEY (team_id)
+    REFERENCES teams(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+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)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  FOREIGN KEY (teaching_assistant_team_id)
+    REFERENCES  teaching_assistant_teams(team_id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS students (
+  person_id INTEGER PRIMARY KEY,
+  team_id INTEGER NOT NULL,
+  chose_partner INTEGER NOT NULL,
+  FOREIGN KEY (person_id)
+    REFERENCES persons(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  FOREIGN KEY (team_id)
+    REFERENCES teams(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS teaching_assistants (
+  person_id INTEGER PRIMARY KEY,
+  team_id INTEGER NOT NULL,
+  FOREIGN KEY (person_id)
+    REFERENCES persons(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  FOREIGN KEY (team_id)
+    REFERENCES teams(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+-- Error queue storage.
+CREATE TABLE IF NOT EXISTS error_types (
+  id INTEGER PRIMARY KEY,
+  name TEXT NOT NULL UNIQUE
+);
+
+INSERT INTO error_types (id, name)
+VALUES (0, 'team_error'),
+       (1, 'person_error'),
+       (2, 'system_error');
+
+CREATE TABLE IF NOT EXISTS errors (
+  id INTEGER PRIMARY KEY,
+  timestamp DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+  error_type_id INTEGER NOT NULL,
+  message TEXT NOT NULL,
+  FOREIGN KEY (error_type_id)
+    REFERENCES error_types(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS team_errors (
+  error_id INTEGER PRIMARY KEY,
+  team_id INTEGER NOT NULL,
+  FOREIGN KEY (error_id)
+    REFERENCES errors(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  FOREIGN KEY (team_id)
+    REFERENCES teams(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);
+
+CREATE TABLE IF NOT EXISTS person_errors (
+  error_id INTEGER PRIMARY KEY,
+  person_id INTEGER NOT NULL,
+  FOREIGN KEY (error_id)
+    REFERENCES errors(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE,
+  FOREIGN KEY (person_id)
+    REFERENCES persons(id)
+    ON DELETE CASCADE
+    ON UPDATE CASCADE
+);