From be957e53b3a6ad112ba66d8b4e32c972486aa09a Mon Sep 17 00:00:00 2001
From: Jan-Peter von Hunnius <jan@hunnius.net>
Date: Fri, 23 Aug 2019 17:38:42 +0200
Subject: Implemented filter function for "All Episodes" list (#3321)

---
 .../de/danoeh/antennapod/dialog/FilterDialog.java  | 62 ++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 app/src/main/java/de/danoeh/antennapod/dialog/FilterDialog.java

(limited to 'app/src/main/java/de/danoeh/antennapod/dialog/FilterDialog.java')

diff --git a/app/src/main/java/de/danoeh/antennapod/dialog/FilterDialog.java b/app/src/main/java/de/danoeh/antennapod/dialog/FilterDialog.java
new file mode 100644
index 000000000..607084c42
--- /dev/null
+++ b/app/src/main/java/de/danoeh/antennapod/dialog/FilterDialog.java
@@ -0,0 +1,62 @@
+package de.danoeh.antennapod.dialog;
+
+import android.content.Context;
+import android.support.v7.app.AlertDialog;
+import android.text.TextUtils;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.core.feed.FeedItemFilter;
+
+public abstract class FilterDialog {
+
+    protected FeedItemFilter filter;
+    protected Context context;
+
+    public FilterDialog(Context context, FeedItemFilter feedItemFilter) {
+        this.context = context;
+        this.filter = feedItemFilter;
+    }
+
+    public void openDialog() {
+        final String[] items = context.getResources().getStringArray(R.array.episode_filter_options);
+        final String[] values = context.getResources().getStringArray(R.array.episode_filter_values);
+        final boolean[] checkedItems = new boolean[items.length];
+
+        final Set<String> filterValues = new HashSet<>(Arrays.asList(filter.getValues()));
+
+        // make sure we have no empty strings in the filter list
+        for (String filterValue : filterValues) {
+            if (TextUtils.isEmpty(filterValue)) {
+                filterValues.remove(filterValue);
+            }
+        }
+
+        for (int i = 0; i < values.length; i++) {
+            String value = values[i];
+            if (filterValues.contains(value)) {
+                checkedItems[i] = true;
+            }
+        }
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(context);
+        builder.setTitle(R.string.filter);
+        builder.setMultiChoiceItems(items, checkedItems, (dialog, which, isChecked) -> {
+            if (isChecked) {
+                filterValues.add(values[which]);
+            } else {
+                filterValues.remove(values[which]);
+            }
+        });
+        builder.setPositiveButton(R.string.confirm_label, (dialog, which) -> {
+            updateFilter(filterValues);
+        });
+        builder.setNegativeButton(R.string.cancel_label, null);
+        builder.create().show();
+    }
+
+    protected abstract void updateFilter(Set<String> filterValues);
+}
-- 
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