generic approach to add parameters to a URL

Author: maxme

WordPressUtils/src/androidTest/java/org/wordpress/android/util/UrlUtilsTest.java

@@ -2,6 +2,9 @@
 
 import android.test.InstrumentationTestCase;
 
+import java.util.HashMap;
+import java.util.Map;
+
 public class UrlUtilsTest extends InstrumentationTestCase {
     public void testGetDomainFromUrlWithEmptyStringDoesNotReturnNull() {
         assertNotNull(UrlUtils.getDomainFromUrl(""));
@@ -17,4 +20,55 @@ public void testGetDomainFromUrlWithHostReturnsHost() {
 
         assertTrue(host.equals("www.wordpress.com"));
     }
+
+    public void testAppendUrlParameter1() {
+        String url = UrlUtils.appendUrlParameter("http://wp.com/test", "preview", "true");
+        assertEquals("http://wp.com/test?preview=true", url);
+    }
+
+    public void testAppendUrlParameter2() {
+        String url = UrlUtils.appendUrlParameter("http://wp.com/test?q=pony", "preview", "true");
+        assertEquals("http://wp.com/test?q=pony&preview=true", url);
+    }
+
+    public void testAppendUrlParameter3() {
+        String url = UrlUtils.appendUrlParameter("http://wp.com/test?q=pony#unicorn", "preview", "true");
+        assertEquals("http://wp.com/test?q=pony&preview=true#unicorn", url);
+    }
+
+    public void testAppendUrlParameter4() {
+        String url = UrlUtils.appendUrlParameter("/relative/test", "preview", "true");
+        assertEquals("/relative/test?preview=true", url);
+    }
+
+    public void testAppendUrlParameter5() {
+        String url = UrlUtils.appendUrlParameter("/relative/", "preview", "true");
+        assertEquals("/relative/?preview=true", url);
+    }
+
+    public void testAppendUrlParameter6() {
+        String url = UrlUtils.appendUrlParameter("http://wp.com/test/", "preview", "true");
+        assertEquals("http://wp.com/test/?preview=true", url);
+    }
+
+    public void testAppendUrlParameter7() {
+        String url = UrlUtils.appendUrlParameter("http://wp.com/test/?q=pony", "preview", "true");
+        assertEquals("http://wp.com/test/?q=pony&preview=true", url);
+    }
+
+    public void testAppendUrlParameters1() {
+        Map<String, String> params = new HashMap<>();
+        params.put("w", "200");
+        params.put("h", "300");
+        String url = UrlUtils.appendUrlParameters("http://wp.com/test", params);
+        assertEquals("http://wp.com/test?h=300&w=200", url);
+    }
+
+    public void testAppendUrlParameters2() {
+        Map<String, String> params = new HashMap<>();
+        params.put("h", "300");
+        params.put("w", "200");
+        String url = UrlUtils.appendUrlParameters("/relative/test", params);
+        assertEquals("/relative/test?h=300&w=200", url);
+    }
 }

WordPressUtils/src/main/java/org/wordpress/android/util/UrlUtils.java

@@ -13,6 +13,8 @@
 import java.net.URLDecoder;
 import java.net.URLEncoder;
 import java.nio.charset.Charset;
+import java.util.HashMap;
+import java.util.Map;
 
 public class UrlUtils {
     public static String urlEncode(final String text) {
@@ -143,11 +145,7 @@ public static String removeQuery(final String urlString) {
         if (urlString == null) {
             return null;
         }
-        int pos = urlString.indexOf("?");
-        if (pos == -1) {
-            return urlString;
-        }
-        return urlString.substring(0, pos);
+        return Uri.parse(urlString).buildUpon().clearQuery().toString();
     }
 
     /**
@@ -214,7 +212,17 @@ public static boolean isImageUrl(String url) {
                 cleanedUrl.endsWith("gif") || cleanedUrl.endsWith("png");
     }
 
-    public static String appendPreviewURLParameter(String url) {
-        return Uri.parse(url).buildUpon().appendQueryParameter("preview", "true").build().toString();
+    public static String appendUrlParameter(String url, String paramName, String paramValue) {
+        Map<String, String> parameters = new HashMap<>();
+        parameters.put(paramName, paramValue);
+        return appendUrlParameters(url, parameters);
+    }
+
+    public static String appendUrlParameters(String url, Map<String, String> parameters) {
+        Uri.Builder uriBuilder = Uri.parse(url).buildUpon();
+        for (Map.Entry<String, String> parameter : parameters.entrySet()) {
+            uriBuilder.appendQueryParameter(parameter.getKey(), parameter.getValue());
+        }
+        return uriBuilder.build().toString();
     }
 }