Fix issue 3526 Unlike "Items" tab, "child classes" tab does not display description nor image thumbnail

app/src/main/java/fr/free/nrw/commons/depictions/SubClass/models/Binding.java

@@ -13,7 +13,9 @@ public class Binding {
     @SerializedName("subclassLabel")
     @Expose
     private SubclassLabel subclassLabel;
-
+    @SerializedName("subclassDescription")
+    @Expose
+    private SubclassDescription subclassDescription;
     /**
      * No args constructor for use in serialization
      *
@@ -26,10 +28,11 @@ public Binding() {
      * @param subclassLabel
      * @param subclass
      */
-    public Binding(Subclass subclass, SubclassLabel subclassLabel) {
+    public Binding(Subclass subclass, SubclassLabel subclassLabel, SubclassDescription subclassDescription) {
         super();
         this.subclass = subclass;
         this.subclassLabel = subclassLabel;
+        this.subclassDescription = subclassDescription;
     }
 
     public Subclass getSubclass() {
@@ -44,8 +47,16 @@ public SubclassLabel getSubclassLabel() {
         return subclassLabel;
     }
 
+    public SubclassDescription getSubclassDescription(){
+        return subclassDescription;
+    }
+
     public void setSubclassLabel(SubclassLabel subclassLabel) {
         this.subclassLabel = subclassLabel;
     }
 
+    public void setSubclassDescription(SubclassDescription subclassDescription) {
+        this.subclassDescription = subclassDescription;
+    }
+
 }

app/src/main/java/fr/free/nrw/commons/depictions/SubClass/models/SubclassDescription.java

@@ -0,0 +1,68 @@
+package fr.free.nrw.commons.depictions.SubClass.models;
+import com.google.gson.annotations.Expose;
+import com.google.gson.annotations.SerializedName;
+
+/**
+ * Model class for parsing SparqlQueryResponse
+ */
+public class SubclassDescription {
+
+  @SerializedName("type")
+  @Expose
+  private String type;
+  @SerializedName("value")
+  @Expose
+  private String value;
+  @SerializedName("xml:lang")
+  @Expose
+  private String xmlLang;
+
+  /**
+   * No args constructor for use in serialization
+   *
+   */
+  public SubclassDescription() {
+  }
+
+  /**
+   *
+   * @param value
+   * @param xmlLang
+   * @param type
+   */
+  public SubclassDescription(String type, String value, String xmlLang) {
+    super();
+    this.type = type;
+    this.value = value;
+    this.xmlLang = xmlLang;
+  }
+
+  public String getType() {
+    return type;
+  }
+
+  /**
+   * returns type
+   */
+  public void setType(String type) {
+    this.type = type;
+  }
+
+  /**
+   * gets value of the depiction
+   */
+  public String getValue() {
+    return value;
+  }
+
+  public void setValue(String value) {
+    this.value = value;
+  }
+
+  /**
+   * get language in which the depiction was requested
+   */
+  public String getXmlLang() {
+    return xmlLang;
+  }
+}

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

@@ -6,6 +6,7 @@
 
 import com.google.gson.Gson;
 
+import fr.free.nrw.commons.depictions.SubClass.models.SubclassDescription;
 import org.apache.commons.lang3.StringUtils;
 import org.json.JSONArray;
 import org.json.JSONObject;
@@ -242,7 +243,13 @@ public Observable<ArrayList<DepictedItem>> getChildQIDs(String qid) throws IOExc
                     String label = binding.getSubclassLabel().getValue();
                     String entityId = binding.getSubclass().getValue();
                     entityId = entityId.substring(entityId.lastIndexOf("/") + 1);
-                    subItems.add(new DepictedItem(label, "", "", false,entityId ));
+                    String description = "";
+                    SubclassDescription subclassDescription = binding.getSubclassDescription();
+                    if (subclassDescription != null
+                        && subclassDescription.getXmlLang() != null) {
+                        description = subclassDescription.getValue();
+                    }
+                    subItems.add(new DepictedItem(label, description, "", false, entityId));
                     Timber.e(label);
                 }
             }
@@ -288,7 +295,13 @@ public Observable<ArrayList<DepictedItem>> getParentQIDs(String qid) throws IOEx
                         if (parentClass.get("value") != null) {
                             String entityId = parentClass.getString("value");
                             entityId = entityId.substring(entityId.lastIndexOf("/") + 1);
-                            subItems.add(new DepictedItem(labelString, "", "", false, entityId));
+                            String description = "";
+                            if (!object.isNull("parentClassDescription")) {
+                                JSONObject parentClassDescription = (JSONObject) object
+                                    .get("parentClassDescription");
+                                description = parentClassDescription.getString("value");
+                            }
+                            subItems.add(new DepictedItem(labelString, description, "", false, entityId));
                         }
                     }
                 }

app/src/main/resources/queries/parentclasses_query.rq

@@ -1,4 +1,4 @@
-SELECT ?parentClass ?parentClassLabel WHERE {
+SELECT ?parentClass ?parentClassLabel ?parentClassDescription WHERE {
     wd:${QID} wdt:P279 ?parentClass.
     SERVICE wikibase:label { bd:serviceParam wikibase:language ${LANG}. }
 }

app/src/main/resources/queries/subclasses_query.rq

@@ -1,4 +1,4 @@
-SELECT ?subclass ?subclassLabel WHERE {
+SELECT ?subclass ?subclassLabel ?subclassDescription WHERE {
     ?subclass wdt:P279 wd:${QID}.
     SERVICE wikibase:label { bd:serviceParam wikibase:language ${LANG}. }
 }