Handle magnet links with termux-url-opener

Fixes #1339 and #1382.

app/build.gradle

@@ -6,7 +6,7 @@ android {
     compileSdkVersion 28
 
     dependencies {
-        implementation "androidx.annotation:annotation:1.0.1"
+        implementation "androidx.annotation:annotation:1.1.0"
         implementation "androidx.viewpager:viewpager:1.0.0"
         implementation "androidx.drawerlayout:drawerlayout:1.0.0"
         implementation project(":terminal-view")
@@ -62,10 +62,17 @@ android {
             path "src/main/cpp/Android.mk"
         }
     }
+
+    testOptions {
+        unitTests {
+            includeAndroidResources = true
+        }
+    }
 }
 
 dependencies {
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13'
+    testImplementation 'org.robolectric:robolectric:4.3'
 }
 
 task versionName {

app/src/main/java/com/termux/filepicker/TermuxFileReceiverActivity.java

@@ -21,6 +21,7 @@ import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
 
 public class TermuxFileReceiverActivity extends Activity {
 
@@ -36,6 +37,11 @@ public class TermuxFileReceiverActivity extends Activity {
      */
     boolean mFinishOnDismissNameDialog = true;
 
+    static boolean isSharedTextAnUrl(String sharedText) {
+        return Patterns.WEB_URL.matcher(sharedText).matches()
+            || Pattern.matches("magnet:\\?xt=urn:btih:.*?", sharedText);
+    }
+
     @Override
     protected void onResume() {
         super.onResume();
@@ -50,7 +56,7 @@ public class TermuxFileReceiverActivity extends Activity {
             final Uri sharedUri = intent.getParcelableExtra(Intent.EXTRA_STREAM);
 
             if (sharedText != null) {
-                if (Patterns.WEB_URL.matcher(sharedText).matches()) {
+                if (isSharedTextAnUrl(sharedText)) {
                     handleUrlAndFinish(sharedText);
                 } else {
                     String subject = intent.getStringExtra(Intent.EXTRA_SUBJECT);

app/src/test/java/com/termux/app/TermuxActivityTest.java

@@ -1,18 +1,20 @@
 package com.termux.app;
 
-import junit.framework.TestCase;
+import org.junit.Assert;
+import org.junit.Test;
 
 import java.util.Collections;
 import java.util.LinkedHashSet;
 
-public class TermuxActivityTest extends TestCase {
+public class TermuxActivityTest {
 
     private void assertUrlsAre(String text, String... urls) {
         LinkedHashSet<String> expected = new LinkedHashSet<>();
         Collections.addAll(expected, urls);
-		assertEquals(expected, TermuxActivity.extractUrls(text));
+        Assert.assertEquals(expected, TermuxActivity.extractUrls(text));
     }
 
+    @Test
     public void testExtractUrls() {
         assertUrlsAre("hello http://example.com world", "http://example.com");
 

app/src/test/java/com/termux/filepicker/TermuxFileReceiverActivityTest.java

@@ -0,0 +1,32 @@
+package com.termux.filepicker;
+
+import org.junit.Assert;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RunWith(RobolectricTestRunner.class)
+public class TermuxFileReceiverActivityTest {
+
+    @Test
+    public void testIsSharedTextAnUrl() {
+        List<String> validUrls = new ArrayList<>();
+        validUrls.add("http://example.com");
+        validUrls.add("https://example.com");
+        validUrls.add("https://example.com/path/parameter=foo");
+        validUrls.add("magnet:?xt=urn:btih:d540fc48eb12f2833163eed6421d449dd8f1ce1f&dn=Ubuntu+desktop+19.04+%2864bit%29&tr=udp%3A%2F%2Ftracker.openbittorrent.com%3A80&tr=udp%3A%2F%2Ftracker.publicbt.com%3A80&tr=udp%3A%2F%2Ftracker.ccc.de%3A80");
+        for (String url : validUrls) {
+            Assert.assertTrue(TermuxFileReceiverActivity.isSharedTextAnUrl(url));
+        }
+
+        List<String> invalidUrls = new ArrayList<>();
+        invalidUrls.add("a test with example.com");
+        for (String url : invalidUrls) {
+            Assert.assertFalse(TermuxFileReceiverActivity.isSharedTextAnUrl(url));
+        }
+    }
+
+}

terminal-emulator/build.gradle

@@ -60,7 +60,7 @@ tasks.withType(Test) {
 }
 
 dependencies {
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13'
 }
 
 apply from: '../scripts/bintray-publish.gradle'

terminal-view/build.gradle

@@ -20,7 +20,7 @@ android {
     compileSdkVersion 28
 
     dependencies {
-        implementation "androidx.annotation:annotation:1.0.1"
+        implementation "androidx.annotation:annotation:1.1.0"
         api project(":terminal-emulator")
     }
 
@@ -44,7 +44,7 @@ android {
 }
 
 dependencies {
-    testImplementation 'junit:junit:4.12'
+    testImplementation 'junit:junit:4.13'
 }
 
 apply from: '../scripts/bintray-publish.gradle'