From 03f8741f3d3d3c9c581c7d7c3a6901a3492d5240 Mon Sep 17 00:00:00 2001
From: Alex Ning <chineseperson5@gmail.com>
Date: Sun, 18 Jul 2021 23:22:10 +0800
Subject: Add a refresh menu item in TrendingActivity.

---
 .../activities/TrendingActivity.java               | 38 ++++++++++++++++++++--
 app/src/main/res/menu/trending_activity.xml        | 10 ++++++
 2 files changed, 45 insertions(+), 3 deletions(-)
 create mode 100644 app/src/main/res/menu/trending_activity.xml

diff --git a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/TrendingActivity.java b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/TrendingActivity.java
index 79d8b24e..fa9ac0f0 100644
--- a/app/src/main/java/ml/docilealligator/infinityforreddit/activities/TrendingActivity.java
+++ b/app/src/main/java/ml/docilealligator/infinityforreddit/activities/TrendingActivity.java
@@ -6,6 +6,8 @@ import android.os.Build;
 import android.os.Bundle;
 import android.os.Handler;
 import android.util.DisplayMetrics;
+import android.view.Menu;
+import android.view.MenuItem;
 import android.view.View;
 import android.view.Window;
 import android.view.WindowManager;
@@ -97,6 +99,7 @@ public class TrendingActivity extends BaseActivity {
     Executor mExecutor;
     private String mAccessToken;
     private String mAccountName;
+    private boolean isRefreshing = false;
     private ArrayList<TrendingSearch> trendingSearches;
     private TrendingSearchRecyclerViewAdapter adapter;
 
@@ -170,7 +173,7 @@ public class TrendingActivity extends BaseActivity {
         recyclerView.setAdapter(adapter);
 
         swipeRefreshLayout.setEnabled(mSharedPreferences.getBoolean(SharedPreferencesUtils.PULL_TO_REFRESH, true));
-        swipeRefreshLayout.setOnRefreshListener(this::loadTrendingSearches);
+        swipeRefreshLayout.setOnRefreshListener(this::fetchTrendingSearches);
 
         if (savedInstanceState != null) {
             trendingSearches = savedInstanceState.getParcelableArrayList(TRENDING_SEARCHES_STATE);
@@ -178,11 +181,16 @@ public class TrendingActivity extends BaseActivity {
         if (trendingSearches != null) {
             adapter.setTrendingSearches(trendingSearches);
         } else {
-            loadTrendingSearches();
+            fetchTrendingSearches();
         }
     }
 
-    private void loadTrendingSearches() {
+    private void fetchTrendingSearches() {
+        if (isRefreshing) {
+            return;
+        }
+        isRefreshing = true;
+
         errorLinearLayout.setVisibility(View.GONE);
         Glide.with(this).clear(errorImageView);
         swipeRefreshLayout.setRefreshing(true);
@@ -222,12 +230,14 @@ public class TrendingActivity extends BaseActivity {
                                 trendingSearches = trendingSearchList;
                                 swipeRefreshLayout.setRefreshing(false);
                                 adapter.setTrendingSearches(trendingSearches);
+                                isRefreshing = false;
                             });
                         } catch (JSONException e) {
                             e.printStackTrace();
                             handler.post(() -> {
                                 swipeRefreshLayout.setRefreshing(false);
                                 showErrorView(R.string.error_parse_trending_search);
+                                isRefreshing = false;
                             });
                         }
                     });
@@ -235,6 +245,7 @@ public class TrendingActivity extends BaseActivity {
                     handler.post(() -> {
                         swipeRefreshLayout.setRefreshing(false);
                         showErrorView(R.string.error_fetch_trending_search);
+                        isRefreshing = false;
                     });
                 }
             }
@@ -244,6 +255,7 @@ public class TrendingActivity extends BaseActivity {
                 handler.post(() -> {
                     swipeRefreshLayout.setRefreshing(false);
                     showErrorView(R.string.error_fetch_trending_search);
+                    isRefreshing = false;
                 });
             }
         });
@@ -255,6 +267,26 @@ public class TrendingActivity extends BaseActivity {
         errorTextView.setText(stringId);
     }
 
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.trending_activity, menu);
+        applyMenuItemTheme(menu);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(@NonNull MenuItem item) {
+        if (item.getItemId() == android.R.id.home) {
+            finish();
+            return true;
+        } else if (item.getItemId() == R.id.action_refresh_trending_activity) {
+            fetchTrendingSearches();
+            return true;
+        }
+
+        return false;
+    }
+
     @Override
     protected void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);
diff --git a/app/src/main/res/menu/trending_activity.xml b/app/src/main/res/menu/trending_activity.xml
new file mode 100644
index 00000000..2bd2db1c
--- /dev/null
+++ b/app/src/main/res/menu/trending_activity.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/action_refresh_trending_activity"
+        android:orderInCategory="1"
+        android:title="@string/action_refresh"
+        android:icon="@drawable/ic_refresh_24dp"
+        app:showAsAction="ifRoom" />
+</menu>
\ No newline at end of file
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