database working + added more activities

app/src/main/AndroidManifest.xml

@@ -13,19 +13,25 @@
         android:theme="@style/Theme.KomodoHub"
         tools:targetApi="31">
         <activity
-            android:name=".ui.login.LoginActivity"
-            android:exported="false"
-            android:label="@string/title_activity_login" />
-        <activity
-            android:name=".MainActivity"
+            android:name=".LoginActivity"
             android:exported="true"
-            android:theme="@style/Theme.KomodoHub">
+            android:label="@string/title_activity_login" >
+
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+        <activity
+            android:name=".MainActivity"
+            android:exported="true"
+            android:theme="@style/Theme.KomodoHub">
+        </activity>
+        <activity
+            android:name=".SearchActivity"
+            android:exported="false"
+            android:theme="@style/Theme.KomodoHub">
+        </activity>
     </application>
-
 </manifest>

app/src/main/java/com/example/komodohub/DatabaseAdapter.java

@@ -0,0 +1,111 @@
+package com.example.komodohub;
+
+import android.annotation.SuppressLint;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+import androidx.annotation.NonNull;
+
+import com.example.komodohub.models.User;
+
+public class DatabaseAdapter {
+    DatabaseHelper dbHelper;
+
+    public DatabaseAdapter(Context context) {
+        dbHelper = new DatabaseHelper(context);
+    }
+
+    public long insertUser(String username, String password) {
+        SQLiteDatabase db = dbHelper.getWritableDatabase();
+
+        ContentValues contentValues = new ContentValues();
+        contentValues.putNull("Id");
+        contentValues.put("Username", username);
+        contentValues.put("Password", password);
+        contentValues.putNull("CommunityId");
+        contentValues.put("IsCommunityOwner", 0);
+        contentValues.put("IsAdmin", 0);
+
+        long id = db.insert("Users", null, contentValues);
+        return id;
+    }
+
+    public User getUserByName(String username)
+    {
+        SQLiteDatabase db = dbHelper.getWritableDatabase();
+
+        Cursor c = db.rawQuery("SELECT * FROM Users WHERE Username = ?", new String[] {username});
+        c.moveToFirst();
+
+        @SuppressLint("Range") User newUser = new User(
+                c.getInt(c.getColumnIndex("Id")),
+                c.getString(c.getColumnIndex("Username")),
+                c.getString(c.getColumnIndex("Password")),
+                c.getInt(c.getColumnIndex("CommunityId")),
+                c.getInt(c.getColumnIndex("IsCommunityOwner")) != 0,    // != 0 is to convert to a bool
+                c.getInt(c.getColumnIndex("IsAdmin")) != 0);
+
+        c.close();
+
+        return newUser;
+    }
+
+    public int deleteUser(String username) {
+        SQLiteDatabase db = dbHelper.getWritableDatabase();
+        String[] whereArgs = {username};
+
+        int count = db.delete("Users", "Username" + " = ?", whereArgs);
+        return count;
+    }
+
+
+
+    static class DatabaseHelper extends SQLiteOpenHelper {
+        private Context context;
+        private static final String DATABASE_NAME = "KomodoDB";
+
+        public DatabaseHelper(Context context) {
+            super(context, DATABASE_NAME, null, 1);
+            this.context = context;
+        }
+
+        @Override
+        public void onCreate(@NonNull SQLiteDatabase sqLiteDatabase) {
+            String usersTable = "CREATE TABLE Users(\n" +
+                    "    Id INTEGER PRIMARY KEY,\n" +
+                    "    Username TEXT NOT NULL UNIQUE,\n" +
+                    "    Password TEXT NOT NULL,\n" +
+                    "    CommunityId INTEGER,\n" +
+                    "    IsCommunityOwner INTEGER NOT NULL,\n" +
+                    "    IsAdmin INTEGER NOT NULL\n" +
+                    ");";
+
+            String communitiesTable = "CREATE TABLE Communities(\n" +
+                    "    Id INTEGER PRIMARY KEY,\n" +
+                    "    Name TEXT NOT NULL UNIQUE\n" +
+                    ");\n";
+
+            String resourcesTable = "CREATE TABLE Resources(\n" +
+                    "    Id INTEGER PRIMARY KEY,\n" +
+                    "    CreatorId INTEGER NOT NULL,\n" +
+                    "    DataCreated TEXT NOT NULL,\n" +
+                    "    Type TEXT NOT NULL,\n" +
+                    "    Content TEXT NOT NULL\n" +
+                    ");";
+
+
+            sqLiteDatabase.execSQL(usersTable);
+            sqLiteDatabase.execSQL(communitiesTable);
+            sqLiteDatabase.execSQL(resourcesTable);
+        }
+
+        @Override
+        public void onUpgrade(SQLiteDatabase sqLiteDatabase, int i, int i1) {
+
+        }
+
+    }
+}

app/src/main/java/com/example/komodohub/LoginActivity.java

@@ -0,0 +1,105 @@
+package com.example.komodohub;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.RadioButton;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.graphics.Insets;
+import androidx.core.view.ViewCompat;
+import androidx.core.view.WindowInsetsCompat;
+import androidx.navigation.NavController;
+import androidx.navigation.Navigation;
+import androidx.navigation.ui.AppBarConfiguration;
+import androidx.navigation.ui.NavigationUI;
+
+import com.example.komodohub.databinding.ActivityMainBinding;
+import com.google.android.material.snackbar.Snackbar;
+
+import org.w3c.dom.Text;
+
+import java.util.Objects;
+
+public class LoginActivity extends AppCompatActivity {
+    private DatabaseAdapter dbAdapter;
+    private TextView usernameBox;
+    private TextView passwordBox;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        dbAdapter = new DatabaseAdapter(LoginActivity.this);
+
+        EdgeToEdge.enable(this);
+
+        setContentView(R.layout.activity_login);
+
+        usernameBox = findViewById(R.id.login_username_box);
+        passwordBox = findViewById(R.id.login_password_box);
+    }
+
+    public void loginButton(View view) {
+        String username = "" + usernameBox.getText();
+        String password = "" + passwordBox.getText();
+
+        if(Objects.equals(username, "") || Objects.equals(password, ""))
+        {
+            ErrorToast("Please enter username and password");
+        }
+
+        var user = dbAdapter.getUserByName(username);
+
+        var userState = UserState.getInstance();
+        userState.setUser(user);
+        userState.setLoggedIn(true);
+
+
+        Intent myIntent = new Intent(this, SearchActivity.class);
+        startActivity(myIntent);
+    }
+
+    public void registerButton(View view) {
+        String username = "" + usernameBox.getText();
+        String password = "" + passwordBox.getText();
+
+        if(Objects.equals(username, "") || Objects.equals(password, ""))
+        {
+            ErrorToast("Please enter a username and password");
+            return;
+        }
+
+        var userId = dbAdapter.insertUser(username, password);
+        var user = dbAdapter.getUserByName(username);
+
+        var userState = UserState.getInstance();
+        userState.setUser(user);
+        userState.setLoggedIn(true);
+
+
+        Intent myIntent = new Intent(this, SearchActivity.class);
+        startActivity(myIntent);
+    }
+
+    public void noAccountButton(View view)
+    {
+        Intent myIntent = new Intent(this, SearchActivity.class);
+        startActivity(myIntent);
+    }
+
+    private void ErrorToast(String msg)
+    {
+        String toast_msg = "Error: ";
+
+        toast_msg = toast_msg + msg;
+
+        Toast t = Toast.makeText(this, toast_msg, Toast.LENGTH_SHORT);
+        t.show();
+    }
+}

app/src/main/java/com/example/komodohub/ProfileActivity.java

@@ -0,0 +1,22 @@
+package com.example.komodohub;
+
+import android.os.Bundle;
+
+import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AppCompatActivity;
+
+public class ProfileActivity extends AppCompatActivity {
+    private DatabaseAdapter dbAdapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        dbAdapter = new DatabaseAdapter(ProfileActivity.this);
+
+        EdgeToEdge.enable(this);
+
+        setContentView(R.layout.activity_profile);
+
+    }
+}

app/src/main/java/com/example/komodohub/SearchActivity.java

@@ -0,0 +1,28 @@
+package com.example.komodohub;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.activity.EdgeToEdge;
+import androidx.appcompat.app.AppCompatActivity;
+
+import java.util.Objects;
+
+public class SearchActivity extends AppCompatActivity {
+    private DatabaseAdapter dbAdapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        dbAdapter = new DatabaseAdapter(SearchActivity.this);
+
+        EdgeToEdge.enable(this);
+
+        setContentView(R.layout.activity_search);
+
+    }
+}

app/src/main/java/com/example/komodohub/UserState.java

@@ -0,0 +1,41 @@
+package com.example.komodohub;
+
+import com.example.komodohub.models.User;
+
+public class UserState {
+    private static final UserState instance;
+
+    private User user;
+
+    public boolean isLoggedIn() {
+        return isLoggedIn;
+    }
+
+    public void setLoggedIn(boolean loggedIn) {
+        isLoggedIn = loggedIn;
+    }
+
+    private boolean isLoggedIn;
+
+
+    public User getUser() {
+        return user;
+    }
+
+    public void setUser(User myVar) {
+        this.user = myVar;
+    }
+
+
+    static {
+        instance = new UserState();
+    }
+
+    private UserState() {
+    }
+
+    public static UserState getInstance() {
+        return UserState.instance;
+    }
+
+}

app/src/main/java/com/example/komodohub/create_tables.sql

@@ -0,0 +1,21 @@
+CREATE TABLE Users(
+    Id INTEGER PRIMARY KEY,
+    Username TEXT NOT NULL UNIQUE,
+    Password TEXT NOT NULL,
+    CommunityId INTEGER,
+    IsCommunityOwner INTEGER NOT NULL,
+    IsAdmin INTEGER NOT NULL
+);
+
+CREATE TABLE Communities(
+    Id INTEGER PRIMARY KEY,
+    Name TEXT NOT NULL
+);
+
+CREATE TABLE Resources(
+    Id INTEGER PRIMARY KEY,
+    CreatorId INTEGER NOT NULL,
+    DataCreated TEXT NOT NULL,
+    Type TEXT NOT NULL,
+    Content TEXT NOT NULL
+);