Fix #1850: Show media talk page in media details (#2560)

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

@@ -39,6 +39,7 @@ public class Media implements Parcelable {
     protected String imageUrl;
     protected String filename;
     protected String description; // monolingual description on input...
+    protected String discussion;
     protected long dataLength;
     protected Date dateCreated;
     protected @Nullable Date dateUploaded;
@@ -195,6 +196,22 @@ public class Media implements Parcelable {
         this.filename = filename;
     }
 
+    /**
+     * Sets the discussion of the file.
+     * @param discussion
+     */
+    public void setDiscussion(String discussion) {
+        this.discussion = discussion;
+    }
+
+    /**
+     * Gets the file discussion as a string.
+     * @return file discussion as a string
+     */
+    public String getDiscussion() {
+        return discussion;
+    }
+
     /**
      * Gets the file description.
      * @return file description as a string

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

@@ -1,5 +1,6 @@
 package fr.free.nrw.commons;
 
+import android.text.Html;
 import androidx.annotation.Nullable;
 import android.text.TextUtils;
 
@@ -39,6 +40,7 @@ public class MediaDataExtractor {
     private boolean deletionStatus;
     private ArrayList<String> categories;
     private Map<String, String> descriptions;
+    private String discussion;
     private String license;
     private @Nullable LatLng coordinates;
 
@@ -48,6 +50,7 @@ public class MediaDataExtractor {
         this.descriptions = new HashMap<>();
         this.fetched = false;
         this.mediaWikiApi = mwApi;
+        this.discussion = new String();
     }
 
     /*
@@ -70,6 +73,9 @@ public class MediaDataExtractor {
         }
 
         MediaResult result = mediaWikiApi.fetchMediaByFilename(filename);
+        MediaResult discussion = mediaWikiApi.fetchMediaByFilename(filename.replace("File", "File talk"));
+        setDiscussion(discussion.getWikiSource());
+
 
         // In-page category links are extracted from source, as XML doesn't cover [[links]]
         extractCategories(result.getWikiSource());
@@ -94,6 +100,14 @@ public class MediaDataExtractor {
         }
     }
 
+    private void setDiscussion(String source) {
+        try {
+            discussion = Html.fromHtml(mediaWikiApi.parseWikicode(source)).toString();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
     private void processWikiParseTree(String source, LicenseList licenseList) throws IOException {
         Document doc;
         try {
@@ -307,6 +321,7 @@ public class MediaDataExtractor {
         media.setCategories(categories);
         media.setDescriptions(descriptions);
         media.setCoordinates(coordinates);
+        media.setDiscussion(discussion);
         if (license != null) {
             media.setLicense(license);
         }

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

@@ -112,6 +112,8 @@ public class MediaDetailFragment extends CommonsDaggerSupportFragment {
     TextView coordinates;
     @BindView(R.id.mediaDetailuploadeddate)
     TextView uploadedDate;
+    @BindView(R.id.mediaDetailDisc)
+    TextView mediaDiscussion;
     @BindView(R.id.seeMore)
     TextView seeMore;
     @BindView(R.id.nominatedDeletionBanner)
@@ -341,6 +343,7 @@ public class MediaDetailFragment extends CommonsDaggerSupportFragment {
         license.setText(prettyLicense(media));
         coordinates.setText(prettyCoordinates(media));
         uploadedDate.setText(prettyUploadedDate(media));
+        mediaDiscussion.setText(prettyDiscussion(media));
 
         categoryNames.clear();
         categoryNames.addAll(media.getCategories());
@@ -502,6 +505,14 @@ public class MediaDetailFragment extends CommonsDaggerSupportFragment {
             return desc;
         }
     }
+    private String prettyDiscussion(Media media) {
+        String disc = media.getDiscussion().trim();
+        if (disc.equals("")) {
+            return getString(R.string.detail_discussion_empty);
+        } else {
+            return disc;
+        }
+    }
 
     private String prettyLicense(Media media) {
         String licenseKey = media.getLicense();

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

@@ -306,6 +306,17 @@ public class ApacheHttpClientMediaWikiApi implements MediaWikiApi {
                 .getString("/api/query/pages/page/imageinfo/ii/@thumburl");
     }
 
+    @Override
+    public String parseWikicode(String source) throws IOException {
+        return api.action("flow-parsoid-utils")
+                .param("from", "wikitext")
+                .param("to", "html")
+                .param("content", source)
+                .param("title", "Main_page")
+                .get()
+                .getString("/api/flow-parsoid-utils/@content");
+    }
+
     @Override
     @NonNull
     public MediaResult fetchMediaByFilename(String filename) throws IOException {

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

@@ -66,6 +66,8 @@ public interface MediaWikiApi {
     @Nullable
     boolean addWikidataEditTag(String revisionId) throws IOException;
 
+    String parseWikicode(String source) throws IOException;
+
     @NonNull
     MediaResult fetchMediaByFilename(String filename) throws IOException;
 

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

@@ -309,6 +309,37 @@
                         android:textStyle="bold"/>
                 </LinearLayout>
 
+                <fr.free.nrw.commons.media.MediaDetailSpacer
+                    android:layout_width="match_parent"
+                    android:layout_height="@dimen/small_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_discussion"
+                        android:textColor="@android:color/white"
+                        android:textSize="@dimen/normal_text"
+                        android:textStyle="bold" />
+
+                    <TextView
+                        android:id="@+id/mediaDetailDisc"
+                        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" />
+                </LinearLayout>
+
                 <Button
                     android:id="@+id/copyWikicode"
                     android:layout_width="match_parent"

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

@@ -158,6 +158,7 @@
   <string name="detail_panel_cats_loading">Loading…</string>
   <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_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="no">No</string>
   <string name="media_detail_title">Title</string>
   <string name="media_detail_description">Description</string>
+  <string name="media_detail_discussion">Discussion</string>
   <string name="media_detail_author">Author</string>
   <string name="media_detail_uploaded_date">Uploaded date</string>
   <string name="media_detail_license">License</string>