Convert profile package to kotlin (commons-app#5979)

* Convert ViewModelFactory to kotlin

* Convert UpdateAvatarResponse and related test to Kotlin

* Convert LeaderboardResponse and related test to kotlin

* Convert LeaderboardListAdapter to kotlin

* Convert UserDetailAdapter to kotlin

* Convert LeaderboardListViewModel to kotlin

* Convert DataSourceClass to kotlin

* Convert the LeaderboardFragment to kotlin

* Converted AchievementsFragment to kotlin

* Revert "Converted AchievementsFragment to kotlin"

This reverts commit 4fcbb81.

---------

Co-authored-by: Nicolas Raoul <nicolas.raoul@gmail.com>

Author: psh

app/src/main/java/fr/free/nrw/commons/profile/leaderboard/DataSourceClass.java

@@ -0,0 +1,79 @@
+package fr.free.nrw.commons.profile.leaderboard
+
+import android.accounts.Account
+import androidx.lifecycle.MutableLiveData
+import androidx.paging.PageKeyedDataSource
+import fr.free.nrw.commons.auth.SessionManager
+import fr.free.nrw.commons.mwapi.OkHttpJsonApiClient
+import fr.free.nrw.commons.profile.leaderboard.LeaderboardConstants.LoadingStatus.LOADING
+import fr.free.nrw.commons.profile.leaderboard.LeaderboardConstants.LoadingStatus.LOADED
+import io.reactivex.disposables.CompositeDisposable
+import io.reactivex.disposables.Disposable
+import timber.log.Timber
+import java.util.Objects
+
+/**
+ * This class will call the leaderboard API to get new list when the pagination is performed
+ */
+class DataSourceClass(
+    private val okHttpJsonApiClient: OkHttpJsonApiClient,
+    private val sessionManager: SessionManager,
+    private val duration: String?,
+    private val category: String?,
+    private val limit: Int,
+    private val offset: Int
+) : PageKeyedDataSource<Int, LeaderboardList>() {
+    val progressLiveStatus: MutableLiveData<LeaderboardConstants.LoadingStatus> = MutableLiveData()
+    private val compositeDisposable = CompositeDisposable()
+
+
+    override fun loadInitial(
+        params: LoadInitialParams<Int>, callback: LoadInitialCallback<Int, LeaderboardList?>
+    ) {
+        compositeDisposable.add(okHttpJsonApiClient.getLeaderboard(
+            sessionManager.currentAccount?.name,
+            duration,
+            category,
+            limit.toString(),
+            offset.toString()
+        ).doOnSubscribe { disposable: Disposable? ->
+            compositeDisposable.add(disposable!!)
+            progressLiveStatus.postValue(LOADING)
+        }.subscribe({ response: LeaderboardResponse? ->
+            if (response != null && response.status == 200) {
+                progressLiveStatus.postValue(LOADED)
+                callback.onResult(response.leaderboardList!!, null, response.limit)
+            }
+        }, { t: Throwable? ->
+            Timber.e(t, "Fetching leaderboard statistics failed")
+            progressLiveStatus.postValue(LOADING)
+        }))
+    }
+
+    override fun loadBefore(
+        params: LoadParams<Int>, callback: LoadCallback<Int, LeaderboardList?>
+    ) = Unit
+
+    override fun loadAfter(
+        params: LoadParams<Int>, callback: LoadCallback<Int, LeaderboardList?>
+    ) {
+        compositeDisposable.add(okHttpJsonApiClient.getLeaderboard(
+            Objects.requireNonNull<Account?>(sessionManager.currentAccount).name,
+            duration,
+            category,
+            limit.toString(),
+            params.key.toString()
+        ).doOnSubscribe { disposable: Disposable? ->
+            compositeDisposable.add(disposable!!)
+            progressLiveStatus.postValue(LOADING)
+        }.subscribe({ response: LeaderboardResponse? ->
+            if (response != null && response.status == 200) {
+                progressLiveStatus.postValue(LOADED)
+                callback.onResult(response.leaderboardList!!, params.key + limit)
+            }
+        }, { t: Throwable? ->
+            Timber.e(t, "Fetching leaderboard statistics failed")
+            progressLiveStatus.postValue(LOADING)
+        }))
+    }
+}

app/src/main/java/fr/free/nrw/commons/profile/leaderboard/DataSourceClass.kt

@@ -0,0 +1,27 @@
+package fr.free.nrw.commons.profile.leaderboard
+
+import androidx.lifecycle.MutableLiveData
+import androidx.paging.DataSource
+import fr.free.nrw.commons.auth.SessionManager
+import fr.free.nrw.commons.mwapi.OkHttpJsonApiClient
+
+/**
+ * This class will create a new instance of the data source class on pagination
+ */
+class DataSourceFactory(
+    private val okHttpJsonApiClient: OkHttpJsonApiClient,
+    private val sessionManager: SessionManager
+) : DataSource.Factory<Int, LeaderboardList>() {
+    val mutableLiveData: MutableLiveData<DataSourceClass> = MutableLiveData()
+    var duration: String? = null
+    var category: String? = null
+    var limit: Int = 0
+    var offset: Int = 0
+
+    /**
+     * Creates the new instance of data source class
+     */
+    override fun create(): DataSource<Int, LeaderboardList> = DataSourceClass(
+        okHttpJsonApiClient, sessionManager, duration, category, limit, offset
+    ).also { mutableLiveData.postValue(it) }
+}