move loading of certs into CertificationDao

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/livedata/CertificationDao.java

@@ -0,0 +1,41 @@
+package org.sufficientlysecure.keychain.livedata;
+
+
+import android.arch.persistence.db.SupportSQLiteDatabase;
+import android.content.Context;
+import android.database.Cursor;
+
+import com.squareup.sqldelight.SqlDelightQuery;
+import org.sufficientlysecure.keychain.model.Certification;
+import org.sufficientlysecure.keychain.model.Certification.CertDetails;
+import org.sufficientlysecure.keychain.provider.DatabaseNotifyManager;
+import org.sufficientlysecure.keychain.provider.KeychainDatabase;
+
+
+public class CertificationDao {
+    private final SupportSQLiteDatabase db;
+    private final DatabaseNotifyManager databaseNotifyManager;
+
+    public static CertificationDao getInstance(Context context) {
+        KeychainDatabase keychainDatabase = new KeychainDatabase(context);
+        DatabaseNotifyManager databaseNotifyManager = DatabaseNotifyManager.create(context);
+
+        return new CertificationDao(keychainDatabase.getWritableDatabase(), databaseNotifyManager);
+    }
+
+    private CertificationDao(SupportSQLiteDatabase writableDatabase, DatabaseNotifyManager databaseNotifyManager) {
+        this.db = writableDatabase;
+        this.databaseNotifyManager = databaseNotifyManager;
+    }
+
+    public CertDetails getVerifyingCertDetails(long masterKeyId, int userPacketRank) {
+        SqlDelightQuery query = Certification.FACTORY.selectVerifyingCertDetails(masterKeyId, userPacketRank);
+        try (Cursor cursor = db.query(query)) {
+            if (cursor.moveToFirst()) {
+                return Certification.CERT_DETAILS_MAPPER.map(cursor);
+            }
+        }
+        return null;
+    }
+
+}

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/livedata/GenericLiveData.java

@@ -0,0 +1,26 @@
+package org.sufficientlysecure.keychain.livedata;
+
+
+import android.content.Context;
+import android.net.Uri;
+
+import org.sufficientlysecure.keychain.ui.keyview.loader.AsyncTaskLiveData;
+
+
+public class GenericLiveData<T> extends AsyncTaskLiveData<T> {
+    private GenericDataLoader<T> genericDataLoader;
+
+    public GenericLiveData(Context context, Uri uri, GenericDataLoader<T> genericDataLoader) {
+        super(context, uri);
+        this.genericDataLoader = genericDataLoader;
+    }
+
+    @Override
+    protected T asyncLoadData() {
+        return genericDataLoader.loadData();
+    }
+
+    public interface GenericDataLoader<T> {
+        T loadData();
+    }
+}