Fixes #2337 - Show captions of image in media details (conflicts fixed) (#2933)

* Api call

* added captions

* final commit

* some minor changes

* sigular

* test for captions

* mock fetchCaptionbyFileName

* corrected method name

* * used ? instead of !! (unsafe call on nullable)
* updated unit test for fetchCaptionByFilename()

app/src/main/java/fr/free/nrw/commons/Media.java

@@ -47,6 +47,7 @@ public class Media implements Parcelable {
     protected String filename;
     protected String description; // monolingual description on input...
     protected String discussion;
+    protected String caption;
     protected long dataLength;
     protected Date dateCreated;
     protected @Nullable Date dateUploaded;
@@ -240,6 +241,22 @@ public class Media implements Parcelable {
         return imageUrl;
     }
 
+    /**
+     * Sets the Caption of the file.
+     * @param caption
+     */
+    public void setCaption(String caption) {
+        this.caption = caption;
+    }
+
+    /**
+     * Gets the file Caption as a string.
+     * @return file Caption as a string
+     */
+    public String getCaption() {
+        return caption;
+    }
+
     /**
      * Gets the name of the file.
      * @return file name as a string

app/src/main/java/fr/free/nrw/commons/MediaDataExtractor.java

@@ -1,5 +1,9 @@
 package fr.free.nrw.commons;
 
+import android.util.Log;
+
+import java.io.IOException;
+
 import javax.inject.Inject;
 import javax.inject.Singleton;
 
@@ -20,16 +24,18 @@ public class MediaDataExtractor {
     private final MediaWikiApi mediaWikiApi;
     private final OkHttpJsonApiClient okHttpJsonApiClient;
 
+
     @Inject
     public MediaDataExtractor(MediaWikiApi mwApi,
                               OkHttpJsonApiClient okHttpJsonApiClient) {
         this.okHttpJsonApiClient = okHttpJsonApiClient;
         this.mediaWikiApi = mwApi;
+
     }
 
     /**
      * Simplified method to extract all details required to show media details.
-     * It fetches media object, deletion status and talk page for the filename
+     * It fetches media object, deletion status, talk page and caption for the filename
      * @param filename for which the details are to be fetched
      * @return full Media object with all details including deletion status and talk page
      */
@@ -37,8 +43,11 @@ public class MediaDataExtractor {
         Single<Media> mediaSingle = getMediaFromFileName(filename);
         Single<Boolean> pageExistsSingle = mediaWikiApi.pageExists("Commons:Deletion_requests/" + filename);
         Single<String> discussionSingle = getDiscussion(filename);
-        return Single.zip(mediaSingle, pageExistsSingle, discussionSingle, (media, deletionStatus, discussion) -> {
+        Single<String> captionSingle = getCaption(filename);
+
+        return Single.zip(mediaSingle, pageExistsSingle, discussionSingle, captionSingle, (media, deletionStatus, discussion, caption) -> {
             media.setDiscussion(discussion);
+            media.setCaption(caption);
             if (deletionStatus) {
                 media.setRequestedDeletion();
             }
@@ -68,5 +77,19 @@ public class MediaDataExtractor {
                     Timber.e(throwable, "Error occurred while fetching discussion");
                     return "";
                 });
+
+    }
+
+    /**
+     * Fetch caption from the MediaWiki API
+     * @param filename the filename we will return the caption for
+     * @return a single with caption string (an empty string if no caption)
+     */
+    private Single<String> getCaption(String filename)  {
+        return mediaWikiApi.fetchCaptionByFilename(filename)
+                .onErrorReturn(throwable -> {
+                    Timber.e(throwable, "Error occurred while fetching caption");
+                    return "";
+                });
     }
 }

app/src/main/java/fr/free/nrw/commons/media/MediaDetailFragment.java

@@ -101,6 +101,8 @@ public class MediaDetailFragment extends CommonsDaggerSupportFragment {
     SimpleDraweeView image;
     @BindView(R.id.mediaDetailSpacer)
     MediaDetailSpacer spacer;
+    @BindView(R.id.mediaDetailCaption)
+    TextView mediaCaption;
     @BindView(R.id.mediaDetailTitle)
     TextView title;
     @BindView(R.id.mediaDetailDesc)
@@ -315,6 +317,7 @@ public class MediaDetailFragment extends CommonsDaggerSupportFragment {
         coordinates.setText(prettyCoordinates(media));
         uploadedDate.setText(prettyUploadedDate(media));
         mediaDiscussion.setText(prettyDiscussion(media));
+        mediaCaption.setText(prettyCaption(media));
 
         categoryNames.clear();
         categoryNames.addAll(media.getCategories());
@@ -516,6 +519,16 @@ public class MediaDetailFragment extends CommonsDaggerSupportFragment {
             return desc;
         }
     }
+
+    private String prettyCaption(Media media) {
+        String caption = media.getCaption().trim();
+        if (caption.equals("")) {
+            return getString(R.string.detail_caption_empty);
+        } else {
+            return caption;
+        }
+    }
+
     private String prettyDiscussion(Media media) {
         String disc = media.getDiscussion().trim();
         if (disc.equals("")) {

app/src/main/java/fr/free/nrw/commons/mwapi/ApacheHttpClientMediaWikiApi.java

@@ -3,6 +3,7 @@ package fr.free.nrw.commons.mwapi;
 import android.content.Context;
 import android.net.Uri;
 import android.text.TextUtils;
+import android.util.Log;
 
 import com.google.gson.Gson;
 
@@ -303,6 +304,26 @@ public class ApacheHttpClientMediaWikiApi implements MediaWikiApi {
                 .getString("/api/flow-parsoid-utils/@content"));
     }
 
+    /**
+     * fetches the Caption of the file with a given name.
+     * @param filename title of the file
+     * @return a single with media caption
+     */
+    @Override
+    public Single<String> fetchCaptionByFilename(String filename) {
+        return Single.fromCallable(() -> {
+            CustomApiResult apiResult = api.action("wbgetentities")
+                    .param("sites", "commonswiki")
+                    .param("titles", filename)
+                    .param("props", "labels")
+                    .param("format", "xml")
+                    .param("languages", Locale.getDefault().getLanguage())
+                    .param("languagefallback", "1")
+                    .get();
+            return apiResult.getString("/api/entities/entity/labels/label/@value");
+        });
+    }
+
     @Override
     @NonNull
     public Single<MediaResult> fetchMediaByFilename(String filename) {

app/src/main/java/fr/free/nrw/commons/mwapi/MediaWikiApi.java

@@ -66,6 +66,8 @@ public interface MediaWikiApi {
 
     Single<String> parseWikicode(String source);
 
+    Single<String> fetchCaptionByFilename(String filename);
+
     @NonNull
     Single<MediaResult> fetchMediaByFilename(String filename);
 

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

@@ -52,6 +52,34 @@
                 android:orientation="vertical"
                 android:padding="@dimen/standard_gap">
 
+                <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:background="?attr/subBackground"
+                    android:orientation="vertical"
+                    android:padding="@dimen/standard_gap">
+
+                    <TextView
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:paddingBottom="@dimen/tiny_gap"
+                        android:text="@string/media_detail_caption"
+                        android:textColor="@android:color/white"
+                        android:textSize="@dimen/normal_text"
+                        android:textStyle="bold" />
+
+                    <TextView
+                        android:id="@+id/mediaDetailCaption"
+                        android:layout_width="match_parent"
+                        android:layout_height="wrap_content"
+                        android:layout_gravity="start"
+                        android:background="?attr/subBackground"
+                        android:padding="@dimen/small_gap"
+                        android:textColor="@android:color/white"
+                        android:textSize="@dimen/description_text_size"
+                        tools:text="Captions of the media" />
+                </LinearLayout>
+
                 <LinearLayout
                     android:layout_width="match_parent"
                     android:layout_height="wrap_content"

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

@@ -160,6 +160,7 @@
   <string name="detail_panel_cats_none">None selected</string>
   <string name="detail_description_empty">No description</string>
   <string name="detail_discussion_empty">No discussion</string>
+  <string name="detail_caption_empty">No caption</string>
   <string name="detail_license_empty">Unknown license</string>
   <string name="menu_refresh">Refresh</string>
   <string name="storage_permission_title">Requesting Storage Permission</string>
@@ -173,6 +174,7 @@
   <string name="upload_image_duplicate">This file already exists on Commons. Are you sure you want to proceed?</string>
   <string name="yes">Yes</string>
   <string name="no">No</string>
+  <string name="media_detail_caption">Caption</string>
   <string name="media_detail_title">Title</string>
   <string name="media_detail_description">Description</string>
   <string name="media_detail_discussion">Discussion</string>

app/src/test/kotlin/fr/free/nrw/commons/MediaDataExtractorTest.kt

@@ -7,12 +7,9 @@ import io.reactivex.Single
 import junit.framework.Assert.assertTrue
 import org.junit.Before
 import org.junit.Test
-import org.mockito.ArgumentMatchers
+import org.mockito.*
-import org.mockito.InjectMocks
-import org.mockito.Mock
 import org.mockito.Mockito.`when`
 import org.mockito.Mockito.mock
-import org.mockito.MockitoAnnotations
 
 /**
  * Test methods in media data extractor
@@ -45,6 +42,8 @@ class MediaDataExtractorTest {
         `when`(okHttpJsonApiClient?.getMedia(ArgumentMatchers.anyString(), ArgumentMatchers.anyBoolean()))
                 .thenReturn(Single.just(mock(Media::class.java)))
 
+        Mockito.`when`(mwApi?.fetchCaptionByFilename(ArgumentMatchers.anyString())).thenReturn(Single.just("test caption"))
+
         `when`(mwApi?.pageExists(ArgumentMatchers.anyString()))
                 .thenReturn(Single.just(true))
 

app/src/test/kotlin/fr/free/nrw/commons/mwapi/ApacheHttpClientMediaWikiApiTest.kt

@@ -6,6 +6,7 @@ import fr.free.nrw.commons.BuildConfig
 import fr.free.nrw.commons.TestCommonsApplication
 import fr.free.nrw.commons.kvstore.JsonKvStore
 import fr.free.nrw.commons.utils.ConfigUtils
+import io.reactivex.observers.TestObserver
 import okhttp3.OkHttpClient
 import okhttp3.mockwebserver.MockResponse
 import okhttp3.mockwebserver.MockWebServer
@@ -23,6 +24,7 @@ import org.wikipedia.util.DateUtil
 import java.net.URLDecoder
 import java.util.*
 
+
 @RunWith(RobolectricTestRunner::class)
 @Config(constants = BuildConfig::class, sdk = intArrayOf(21), application = TestCommonsApplication::class)
 class ApacheHttpClientMediaWikiApiTest {
@@ -240,6 +242,30 @@ class ApacheHttpClientMediaWikiApiTest {
         assertFalse(result)
     }
 
+    @Test
+    fun fetchCaptionByFilename() {
+        server.enqueue(MockResponse().setBody("<?xml version=\"1.0\"?><api success=\"1\"><entities><entity type=\"mediainfo\" id=\"M77157483\"><labels><label language=\"it\" value=\"Test\" /></labels><statements /></entity></entities></api>"))
+
+        val result = testObject.fetchCaptionByFilename("File:foo")
+        val testObserver = TestObserver<String>()
+        result.subscribe(testObserver)
+        assertBasicRequestParameters(server, "GET").let { request ->
+            parseQueryParams(request).let { params ->
+                assertEquals("xml", params["format"])
+                assertEquals("wbgetentities", params["action"])
+                assertEquals("commonswiki", params["sites"])
+                assertEquals("File:foo", params["titles"])
+                assertEquals("labels", params["props"])
+                assertEquals(Locale.getDefault().getLanguage(), params["languages"])
+                assertEquals("1", params["languagefallback"])
+            }
+        }
+
+        testObserver.assertResult("Test")
+        testObserver.assertNoErrors()
+
+    }
+
     @Test
     fun isUserBlockedFromCommonsForInfinitelyBlockedUser() {
         server.enqueue(MockResponse().setBody("<?xml version=\"1.0\"?><api><query><userinfo id=\"1000\" name=\"testusername\" blockid=\"3000\" blockedby=\"blockerusername\" blockedbyid=\"1001\" blockreason=\"testing\" blockedtimestamp=\"2018-05-24T15:32:09Z\" blockexpiry=\"infinite\"></userinfo></query></api>"))