View links to statuses inside Tusky (#568)

* View links to statuses inside Tusky

* Only attempt to open links that look like mastodon statuses

* Add support for pleroma statuses

* Move "smells like mastodon" url check to click handler

* Add bottom sheet to notify users of post query status

* Improve architecture for managing search status

* Push everything into SFragment

* Add external lookup for non-locally-resolved account links

* Clean up copypasta from LinkHelper.setClickableText

* Apply PR feedback

* Migrate bottom sheet wrappers to CoordinatorLayout

app/src/main/java/com/keylesspalace/tusky/AccountActivity.java

@@ -329,6 +329,11 @@ public final class AccountActivity extends BaseActivity implements ActionButtonA
                 intent.putExtra("id", id);
                 startActivity(intent);
             }
+
+            @Override
+            public void onViewURL(String url) {
+                LinkHelper.openLink(url, note.getContext());
+            }
         });
 
         if (account.getLocked()) {

app/src/main/java/com/keylesspalace/tusky/SearchActivity.java

@@ -39,6 +39,7 @@ import com.keylesspalace.tusky.di.Injectable;
 import com.keylesspalace.tusky.entity.SearchResults;
 import com.keylesspalace.tusky.interfaces.LinkListener;
 import com.keylesspalace.tusky.network.MastodonApi;
+import com.keylesspalace.tusky.util.LinkHelper;
 
 import javax.inject.Inject;
 
@@ -141,6 +142,11 @@ public class SearchActivity extends BaseActivity implements SearchView.OnQueryTe
         startActivity(intent);
     }
 
+    @Override
+    public void onViewURL(String url) {
+        LinkHelper.openLink(url, getApplicationContext());
+    }
+
     private void handleIntent(Intent intent) {
         if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
             currentQuery = intent.getStringExtra(SearchManager.QUERY);

app/src/main/java/com/keylesspalace/tusky/fragment/NotificationsFragment.java

@@ -48,7 +48,6 @@ import com.keylesspalace.tusky.entity.Notification;
 import com.keylesspalace.tusky.entity.Status;
 import com.keylesspalace.tusky.interfaces.ActionButtonActivity;
 import com.keylesspalace.tusky.interfaces.StatusActionListener;
-import com.keylesspalace.tusky.network.MastodonApi;
 import com.keylesspalace.tusky.network.TimelineCases;
 import com.keylesspalace.tusky.receiver.TimelineReceiver;
 import com.keylesspalace.tusky.util.CollectionUtil;
@@ -106,8 +105,6 @@ public class NotificationsFragment extends SFragment implements
     @Inject
     public TimelineCases timelineCases;
     @Inject
-    public MastodonApi mastodonApi;
-    @Inject
     AccountManager accountManager;
 
     private SwipeRefreshLayout swipeRefreshLayout;

app/src/main/java/com/keylesspalace/tusky/fragment/SFragment.java

@@ -20,12 +20,15 @@ import android.content.ClipboardManager;
 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.support.design.widget.BottomSheetBehavior;
 import android.support.v4.app.ActivityOptionsCompat;
 import android.support.v4.view.ViewCompat;
 import android.support.v7.widget.PopupMenu;
 import android.text.Spanned;
 import android.view.View;
+import android.widget.LinearLayout;
 
 import com.keylesspalace.tusky.AccountActivity;
 import com.keylesspalace.tusky.ComposeActivity;
@@ -38,15 +41,28 @@ import com.keylesspalace.tusky.ViewThreadActivity;
 import com.keylesspalace.tusky.ViewVideoActivity;
 import com.keylesspalace.tusky.db.AccountEntity;
 import com.keylesspalace.tusky.db.AccountManager;
+import com.keylesspalace.tusky.entity.Account;
 import com.keylesspalace.tusky.entity.Attachment;
+import com.keylesspalace.tusky.entity.SearchResults;
 import com.keylesspalace.tusky.entity.Status;
 import com.keylesspalace.tusky.interfaces.AdapterItemRemover;
+import com.keylesspalace.tusky.network.MastodonApi;
 import com.keylesspalace.tusky.network.TimelineCases;
 import com.keylesspalace.tusky.util.HtmlUtils;
+import com.keylesspalace.tusky.util.LinkHelper;
 
+import java.net.URI;
+import java.net.URISyntaxException;
 import java.util.LinkedHashSet;
+import java.util.List;
 import java.util.Set;
 
+import javax.inject.Inject;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+
 /* Note from Andrew on Jan. 22, 2017: This class is a design problem for me, so I left it with an
  * awkward name. TimelineFragment and NotificationFragment have significant overlap but the nature
  * of that is complicated by how they're coupled with Status and Notification and the corresponding
@@ -58,8 +74,13 @@ public abstract class SFragment extends BaseFragment implements AdapterItemRemov
 
     protected String loggedInAccountId;
     protected String loggedInUsername;
+    protected String searchUrl;
 
     protected abstract TimelineCases timelineCases();
+    protected BottomSheetBehavior bottomSheet;
+
+    @Inject
+    protected MastodonApi mastodonApi;
 
     @Override
     public void onActivityCreated(@Nullable Bundle savedInstanceState) {
@@ -70,6 +91,7 @@ public abstract class SFragment extends BaseFragment implements AdapterItemRemov
             loggedInAccountId = activeAccount.getAccountId();
             loggedInUsername = activeAccount.getUsername();
         }
+        setupBottomSheet(getView());
     }
 
     @Override
@@ -208,11 +230,13 @@ public abstract class SFragment extends BaseFragment implements AdapterItemRemov
     }
 
     protected void viewThread(Status status) {
+        if (!isSearching()) {
             Intent intent = new Intent(getContext(), ViewThreadActivity.class);
             intent.putExtra("id", status.getActionableId());
             intent.putExtra("url", status.getActionableStatus().getUrl());
             startActivity(intent);
         }
+    }
 
     protected void viewTag(String tag) {
         Intent intent = new Intent(getContext(), ViewTagActivity.class);
@@ -235,4 +259,140 @@ public abstract class SFragment extends BaseFragment implements AdapterItemRemov
         intent.putExtra("status_content", HtmlUtils.toHtml(statusContent));
         startActivity(intent);
     }
+
+    // https://mastodon.foo.bar/@User
+    // https://mastodon.foo.bar/@User/43456787654678
+    // https://pleroma.foo.bar/users/User
+    // https://pleroma.foo.bar/users/43456787654678
+    // https://pleroma.foo.bar/notice/43456787654678
+    // https://pleroma.foo.bar/objects/d4643c42-3ae0-4b73-b8b0-c725f5819207
+    private static boolean looksLikeMastodonUrl(String urlString) {
+        URI uri;
+        try {
+            uri = new URI(urlString);
+        } catch (URISyntaxException e) {
+            return false;
+        }
+
+        if (uri.getQuery() != null ||
+                uri.getFragment() != null ||
+                uri.getPath() == null) {
+            return false;
+        }
+
+        String path = uri.getPath();
+        return path.matches("^/@[^/]*$") ||
+                path.matches("^/users/[^/]+$") ||
+                path.matches("^/(@|notice)[^/]*/\\d+$") ||
+                path.matches("^/objects/[-a-f0-9]+$");
+    }
+
+    private void onBeginSearch(@NonNull String url) {
+        searchUrl = url;
+        showQuerySheet();
+    }
+
+    private boolean getCancelSearchRequested(@NonNull String url) {
+        return !url.equals(searchUrl);
+    }
+
+    private boolean isSearching() {
+        return searchUrl != null;
+    }
+
+    private void onEndSearch(@NonNull String url) {
+        if (url.equals(searchUrl)) {
+            // Don't clear query if there's no match,
+            // since we might just now be getting the response for a canceled search
+            searchUrl = null;
+            hideQuerySheet();
+        }
+    }
+
+    private void cancelActiveSearch()
+    {
+        if (isSearching()) {
+            onEndSearch(searchUrl);
+        }
+    }
+
+    public void onViewURL(String url) {
+        if (!looksLikeMastodonUrl(url)) {
+            LinkHelper.openLink(url, getContext());
+            return;
+        }
+
+        Call<SearchResults> call = mastodonApi.search(url, true);
+        call.enqueue(new Callback<SearchResults>() {
+            @Override
+            public void onResponse(@NonNull Call<SearchResults> call, @NonNull Response<SearchResults> response) {
+                if (getCancelSearchRequested(url)) {
+                    return;
+                }
+
+                onEndSearch(url);
+                if (response.isSuccessful()) {
+                    // According to the mastodon API doc, if the search query is a url,
+                    // only exact matches for statuses or accounts are returned
+                    // which is good, because pleroma returns a different url
+                    // than the public post link
+                    List<Status> statuses = response.body().getStatuses();
+                    List<Account> accounts = response.body().getAccounts();
+                    if (statuses != null && !statuses.isEmpty()) {
+                        viewThread(statuses.get(0));
+                        return;
+                    } else if (accounts != null && !accounts.isEmpty()) {
+                        viewAccount(accounts.get(0).getId());
+                        return;
+                    }
+                }
+                LinkHelper.openLink(url, getContext());
+            }
+
+            @Override
+            public void onFailure(@NonNull Call<SearchResults> call, @NonNull Throwable t) {
+                if (!getCancelSearchRequested(url)) {
+                    onEndSearch(url);
+                    LinkHelper.openLink(url, getContext());
+                }
+            }
+        });
+        callList.add(call);
+        onBeginSearch(url);
+    }
+
+    protected void setupBottomSheet(View view)
+    {
+        LinearLayout bottomSheetLayout = view.findViewById(R.id.item_status_bottom_sheet);
+        if (bottomSheetLayout != null) {
+            bottomSheet = BottomSheetBehavior.from(bottomSheetLayout);
+            bottomSheet.setState(BottomSheetBehavior.STATE_HIDDEN);
+            bottomSheet.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {
+                @Override
+                public void onStateChanged(@NonNull View bottomSheet, int newState) {
+                    switch(newState) {
+                        case BottomSheetBehavior.STATE_HIDDEN:
+                            cancelActiveSearch();
+                            break;
+                        default:
+                            break;
+                    }
+                }
+
+                @Override
+                public void onSlide(@NonNull View bottomSheet, float slideOffset) {
+                }
+            });
+        }
+    }
+
+    private void showQuerySheet() {
+        if (bottomSheet != null)
+            bottomSheet.setState(BottomSheetBehavior.STATE_COLLAPSED);
+    }
+
+    private void hideQuerySheet() {
+        if (bottomSheet != null)
+            bottomSheet.setState(BottomSheetBehavior.STATE_HIDDEN);
+    }
 }

app/src/main/java/com/keylesspalace/tusky/fragment/TimelineFragment.java

@@ -99,8 +99,6 @@ public class TimelineFragment extends SFragment implements
 
     @Inject
     TimelineCases timelineCases;
-    @Inject
-    MastodonApi mastodonApi;
 
     private SwipeRefreshLayout swipeRefreshLayout;
     private TimelineAdapter adapter;

app/src/main/java/com/keylesspalace/tusky/fragment/ViewThreadFragment.java

@@ -43,7 +43,6 @@ import com.keylesspalace.tusky.entity.Card;
 import com.keylesspalace.tusky.entity.Status;
 import com.keylesspalace.tusky.entity.StatusContext;
 import com.keylesspalace.tusky.interfaces.StatusActionListener;
-import com.keylesspalace.tusky.network.MastodonApi;
 import com.keylesspalace.tusky.network.TimelineCases;
 import com.keylesspalace.tusky.receiver.TimelineReceiver;
 import com.keylesspalace.tusky.util.PairedList;
@@ -68,8 +67,6 @@ public class ViewThreadFragment extends SFragment implements
 
     @Inject
     public TimelineCases timelineCases;
-    @Inject
-    public MastodonApi mastodonApi;
 
     private SwipeRefreshLayout swipeRefreshLayout;
     private RecyclerView recyclerView;

app/src/main/java/com/keylesspalace/tusky/interfaces/LinkListener.java

@@ -18,4 +18,5 @@ package com.keylesspalace.tusky.interfaces;
 public interface LinkListener {
     void onViewTag(String tag);
     void onViewAccount(String id);
+    void onViewURL(String url);
 }

app/src/main/java/com/keylesspalace/tusky/util/ClickableSpanNoUnderline.kt

@@ -0,0 +1,11 @@
+package com.keylesspalace.tusky.util
+
+import android.text.TextPaint
+import android.text.style.ClickableSpan
+
+abstract class ClickableSpanNoUnderline : ClickableSpan() {
+    override fun updateDrawState(ds: TextPaint?) {
+        super.updateDrawState(ds)
+        ds?.isUnderlineText = false;
+    }
+}

app/src/main/java/com/keylesspalace/tusky/util/LinkHelper.java

@@ -74,20 +74,14 @@ public class LinkHelper {
             int end = builder.getSpanEnd(span);
             int flags = builder.getSpanFlags(span);
             CharSequence text = builder.subSequence(start, end);
+            ClickableSpan customSpan = null;
+
             if (text.charAt(0) == '#') {
                 final String tag = text.subSequence(1, text.length()).toString();
-                ClickableSpan newSpan = new ClickableSpan() {
+                customSpan = new ClickableSpanNoUnderline() {
                     @Override
-                    public void onClick(View widget) {
-                        listener.onViewTag(tag);
-                    }
-                    @Override public void updateDrawState(TextPaint ds) {
-                        super.updateDrawState(ds);
-                        ds.setUnderlineText(false);
-                    }
+                    public void onClick(View widget) { listener.onViewTag(tag); }
                 };
-                builder.removeSpan(span);
-                builder.setSpan(newSpan, start, end, flags);
             } else if (text.charAt(0) == '@' && mentions != null && mentions.length > 0) {
                 String accountUsername = text.subSequence(1, text.length()).toString();
                 /* There may be multiple matches for users on different instances with the same
@@ -104,28 +98,23 @@ public class LinkHelper {
                 }
                 if (id != null) {
                     final String accountId = id;
-                    ClickableSpan newSpan = new ClickableSpan() {
+                    customSpan = new ClickableSpanNoUnderline() {
                         @Override
-                        public void onClick(View widget) {
-                            listener.onViewAccount(accountId);
+                        public void onClick(View widget) { listener.onViewAccount(accountId); }
+                    };
+                }
             }
-                        @Override public void updateDrawState(TextPaint ds) {
-                            super.updateDrawState(ds);
-                            ds.setUnderlineText(false);
+
+            if (customSpan == null) {
+                customSpan = new CustomURLSpan(span.getURL()) {
+                    @Override
+                    public void onClick(View widget) {
+                        listener.onViewURL(getURL());
                     }
                 };
-                    builder.removeSpan(span);
-                    builder.setSpan(newSpan, start, end, flags);
-                } else {
-                    ClickableSpan newSpan = new CustomURLSpan(span.getURL());
-                    builder.removeSpan(span);
-                    builder.setSpan(newSpan, start, end, flags);
             }
-            } else {
-                ClickableSpan newSpan = new CustomURLSpan(span.getURL());
             builder.removeSpan(span);
-                builder.setSpan(newSpan, start, end, flags);
-            }
+            builder.setSpan(customSpan, start, end, flags);
         }
         view.setText(builder);
         view.setLinksClickable(true);

app/src/main/res/layout/fragment_timeline.xml

@@ -1,13 +1,19 @@
 <?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_height="match_parent"
+    android:layout_width="match_parent">
     <android.support.v4.widget.SwipeRefreshLayout
         xmlns:android="http://schemas.android.com/apk/res/android"
         android:id="@+id/swipe_refresh_layout"
         android:layout_width="match_parent"
-    android:layout_height="match_parent">
+        android:layout_height="match_parent"
+        android:layout_gravity="top">
 
         <android.support.v7.widget.RecyclerView
             android:id="@+id/recycler_view"
             android:layout_width="match_parent"
             android:layout_height="match_parent" />
-
     </android.support.v4.widget.SwipeRefreshLayout>
+    <include layout="@layout/item_status_bottom_sheet"/>
+</android.support.design.widget.CoordinatorLayout>

app/src/main/res/layout/fragment_view_thread.xml

@@ -1,8 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
+<android.support.design.widget.CoordinatorLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_height="match_parent"
+    android:layout_width="match_parent">
     <android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
         android:id="@+id/swipe_refresh_layout"
         android:layout_width="match_parent"
-    android:layout_height="match_parent">
+        android:layout_height="match_parent"
+        android:layout_gravity="top">
 
         <android.support.v7.widget.RecyclerView
             android:id="@+id/recycler_view"
@@ -10,3 +15,5 @@
             android:layout_height="match_parent"
             android:scrollbars="vertical" />
     </android.support.v4.widget.SwipeRefreshLayout>
+    <include layout="@layout/item_status_bottom_sheet" />
+</android.support.design.widget.CoordinatorLayout>

app/src/main/res/layout/item_status_bottom_sheet.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/item_status_bottom_sheet"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="80dp"
+    android:layout_gravity="bottom"
+    android:background="?android:colorBackground"
+    app:behavior_hideable="true"
+    app:layout_behavior="android.support.design.widget.BottomSheetBehavior"
+    >
+    <TextView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center"
+        android:text="@string/performing_lookup_title"
+        android:textSize="?attr/status_text_medium"
+        android:textColor="?android:textColorPrimary"
+        />
+</LinearLayout>

app/src/main/res/values/strings.xml

@@ -303,5 +303,6 @@
 
     <string name="error_no_custom_emojis">Your instance %s does not have any custom emojis</string>
     <string name="copy_to_clipboard_success">Copied to clipboard</string>
+    <string name="performing_lookup_title">Performing lookup...</string>
 
 </resources>