Add support for opening Gists from http links

Author: kevinsawicki

app/AndroidManifest.xml

@@ -249,6 +249,24 @@
 
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <data
+                    android:host="gist.github.com"
+                    android:scheme="http" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW" />
+
+                <data
+                    android:host="gist.github.com"
+                    android:scheme="https" />
+
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
         </activity>
         <activity
             android:name=".ui.issue.IssueSearchActivity"

app/src/main/java/com/github/mobile/core/gist/GistUriMatcher.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright 2012 GitHub Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.github.mobile.core.gist;
+
+import android.net.Uri;
+import android.text.TextUtils;
+
+import java.util.List;
+import java.util.regex.Pattern;
+
+import org.eclipse.egit.github.core.Gist;
+
+/**
+ * Parses a {@link Gist} from a {@link Uri}
+ */
+public class GistUriMatcher {
+
+    private static final Pattern PATTERN = Pattern.compile("[a-f0-9]{20}");
+
+    /**
+     * Parse a {@link Gist} from a non-null {@link Uri}
+     *
+     * @param uri
+     * @return {@link Gist} or null if none found in given {@link Uri}
+     */
+    public static Gist getGist(final Uri uri) {
+        List<String> segments = uri.getPathSegments();
+        if (segments == null)
+            return null;
+        if (segments.size() != 1)
+            return null;
+
+        String gistId = segments.get(0);
+        if (TextUtils.isEmpty(gistId))
+            return null;
+
+        if (TextUtils.isDigitsOnly(gistId))
+            return new Gist().setId(gistId);
+
+        if (PATTERN.matcher(gistId).matches())
+            return new Gist().setId(gistId);
+
+        return null;
+    }
+}

app/src/main/java/com/github/mobile/ui/user/UriLauncherActivity.java

@@ -18,6 +18,7 @@
 import static android.content.DialogInterface.BUTTON_POSITIVE;
 import static android.content.Intent.ACTION_VIEW;
 import static android.content.Intent.CATEGORY_BROWSABLE;
+import static org.eclipse.egit.github.core.client.IGitHubConstants.HOST_GISTS;
 import android.app.AlertDialog;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnCancelListener;
@@ -30,17 +31,20 @@
 import com.github.mobile.R.string;
 import com.github.mobile.core.commit.CommitMatch;
 import com.github.mobile.core.commit.CommitUriMatcher;
+import com.github.mobile.core.gist.GistUriMatcher;
 import com.github.mobile.core.issue.IssueUriMatcher;
 import com.github.mobile.core.repo.RepositoryUriMatcher;
 import com.github.mobile.core.user.UserUriMatcher;
 import com.github.mobile.ui.LightAlertDialog;
 import com.github.mobile.ui.commit.CommitViewActivity;
+import com.github.mobile.ui.gist.GistsViewActivity;
 import com.github.mobile.ui.issue.IssuesViewActivity;
 import com.github.mobile.ui.repo.RepositoryViewActivity;
 
 import java.net.URI;
 import java.text.MessageFormat;
 
+import org.eclipse.egit.github.core.Gist;
 import org.eclipse.egit.github.core.Repository;
 import org.eclipse.egit.github.core.RepositoryIssue;
 import org.eclipse.egit.github.core.User;
@@ -56,35 +60,43 @@ protected void onCreate(Bundle savedInstanceState) {
 
         final Intent intent = getIntent();
         final Uri data = intent.getData();
+        if (HOST_GISTS.equals(data.getHost())) {
+            Gist gist = GistUriMatcher.getGist(data);
+            if (gist != null) {
+                startActivity(GistsViewActivity.createIntent(gist));
+                finish();
+                return;
+            }
+        } else {
+            RepositoryIssue issue = IssueUriMatcher.getIssue(data);
+            if (issue != null) {
+                startActivity(IssuesViewActivity.createIntent(issue,
+                        issue.getRepository()));
+                finish();
+                return;
+            }
 
-        RepositoryIssue issue = IssueUriMatcher.getIssue(data);
-        if (issue != null) {
-            startActivity(IssuesViewActivity.createIntent(issue,
-                    issue.getRepository()));
-            finish();
-            return;
-        }
-
-        Repository repository = RepositoryUriMatcher.getRepository(data);
-        if (repository != null) {
-            startActivity(RepositoryViewActivity.createIntent(repository));
-            finish();
-            return;
-        }
+            Repository repository = RepositoryUriMatcher.getRepository(data);
+            if (repository != null) {
+                startActivity(RepositoryViewActivity.createIntent(repository));
+                finish();
+                return;
+            }
 
-        User user = UserUriMatcher.getUser(data);
-        if (user != null) {
-            startActivity(UserViewActivity.createIntent(user));
-            finish();
-            return;
-        }
+            User user = UserUriMatcher.getUser(data);
+            if (user != null) {
+                startActivity(UserViewActivity.createIntent(user));
+                finish();
+                return;
+            }
 
-        CommitMatch commit = CommitUriMatcher.getCommit(data);
-        if (commit != null) {
-            startActivity(CommitViewActivity.createIntent(commit.repository,
-                    commit.commit));
-            finish();
-            return;
+            CommitMatch commit = CommitUriMatcher.getCommit(data);
+            if (commit != null) {
+                startActivity(CommitViewActivity.createIntent(
+                        commit.repository, commit.commit));
+                finish();
+                return;
+            }
         }
 
         if (!intent.hasCategory(CATEGORY_BROWSABLE)) {