first step towards pattern-assisted auto-filling of transactions

[mobile-ledger.git] / app / src / main / java / net / ktnx / mobileledger / ui / patterns / PatternsModel.java

diff --git a/app/src/main/java/net/ktnx/mobileledger/ui/patterns/PatternsModel.java b/app/src/main/java/net/ktnx/mobileledger/ui/patterns/PatternsModel.java
new file mode 100644 (file)
index 0000000..e1cb5ba
--- /dev/null
+++ b/app/src/main/java/net/ktnx/mobileledger/ui/patterns/PatternsModel.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright © 2021 Damyan Ivanov.
+ * This file is part of MoLe.
+ * MoLe is free software: you can distribute it and/or modify it
+ * under the term of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your opinion), any later version.
+ *
+ * MoLe is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License terms for details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package net.ktnx.mobileledger.ui.patterns;
+
+import android.database.Cursor;
+
+import androidx.annotation.NonNull;
+import androidx.lifecycle.MutableLiveData;
+
+import net.ktnx.mobileledger.model.PatternEntry;
+import net.ktnx.mobileledger.utils.Logger;
+import net.ktnx.mobileledger.utils.MLDB;
+
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Locale;
+import java.util.Map;
+
+public class PatternsModel {
+    private static final MutableLiveData<Integer> patternCount = new MutableLiveData<>(0);
+    private static final Map<Integer, WeakReference<PatternEntry>> cachedEntries =
+            new HashMap<Integer, WeakReference<PatternEntry>>() {};
+    public synchronized static void retrievePatterns(PatternsRecyclerViewAdapter modelAdapter) {
+        final ArrayList<PatternEntry> idList = new ArrayList<>();
+        MLDB.queryInBackground("select id, name from patterns", null, new MLDB.CallbackHelper() {
+            @Override
+            public void onDone() {
+                modelAdapter.setPatterns(idList);
+                Logger.debug("patterns",
+                        String.format(Locale.US, "Pattern list loaded from db with %d entries",
+                                idList.size()));
+            }
+            @Override
+            public boolean onRow(@NonNull Cursor cursor) {
+                final PatternEntry entry = new PatternEntry(cursor.getInt(0));
+                entry.setName(cursor.getString(1));
+                idList.add(entry);
+                return true;
+            }
+        });
+    }
+}