Fix 4615: Option for editing caption and description (#4672)

* DescriptionEditHelper implemented

* Description extracted

* Description editable

* No description condition handled

* Code cleanup

* Added javadocs

* toolbar added

* API call done

* Caption edit available

* Progress dialog added

* Log

* Problem with ButterKnife

* Caption is editable

* Removed unused import

* Manifest file reverted

* Manifest file reverted

* Manifest file reverted

* View binding added

* Post operation test added

* Java docs added

* Java docs added

* MediaDetailFragment unit tests added

* Test added

app/src/main/java/fr/free/nrw/commons/actions/PageEditClient.kt

@@ -64,6 +64,24 @@ class PageEditClient(
         }
     }
 
+    /**
+     * Set new labels to Wikibase server of commons
+     * @param summary   Edit summary
+     * @param title Title of the page to edit
+     * @param language  Corresponding language of label
+     * @param value label
+     * @return 1 when the edit was successful
+     */
+    fun setCaptions(summary: String, title: String,
+                    language: String, value: String) : Observable<Int>{
+        return try {
+            pageEditInterface.postCaptions(summary, title, language,
+                value, csrfTokenClient.tokenBlocking).map { it.success }
+        } catch (throwable: Throwable) {
+            Observable.just(0)
+        }
+    }
+
     /**
      * Get whole WikiText of required file
      * @param title : Name of the file

app/src/main/java/fr/free/nrw/commons/actions/PageEditInterface.kt

@@ -5,6 +5,7 @@ import io.reactivex.Single
 import org.wikipedia.dataclient.Service
 import org.wikipedia.dataclient.mwapi.MwQueryResponse
 import org.wikipedia.edit.Edit
+import org.wikipedia.wikidata.Entities
 import retrofit2.http.*
 
 /**
@@ -73,6 +74,18 @@ interface PageEditInterface {
         @Field("token") token: String
     ): Observable<Edit>
 
+
+    @FormUrlEncoded
+    @Headers("Cache-Control: no-cache")
+    @POST(Service.MW_API_PREFIX + "action=wbsetlabel&format=json&site=commonswiki&formatversion=2")
+    fun postCaptions(
+        @Field("summary") summary: String,
+        @Field("title") title: String,
+        @Field("language") language: String,
+        @Field("value") value: String,
+        @Field("token") token: String
+    ): Observable<Entities>
+
     /**
      * Get wiki text for provided file names
      * @param titles : Name of the file