refactor(teams): Convert TeamCoursesAdapter to ListAdapter

Converted `TeamCoursesAdapter` from `RecyclerView.Adapter` to `ListAdapter` to leverage `DiffUtil` for more efficient list updates.

- Modified the adapter to extend `ListAdapter`.
- Implemented a `DIFF_CALLBACK` using `DiffUtils.itemCallback` to compare items.
- Updated `TeamCoursesFragment` to instantiate the adapter without the initial list and to supply data via `adapter.submitList()`.
- Used `realm.copyFromRealm()` to provide a stable, immutable list to the adapter, preventing threading issues with Realm's live objects during background diffing.

Author: google-labs-jules[bot]

app/src/main/java/org/ole/planet/myplanet/ui/teams/courses/TeamCoursesAdapter.kt

@@ -6,21 +6,23 @@ import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.recyclerview.widget.DiffUtil
+import androidx.recyclerview.widget.ListAdapter
 import androidx.recyclerview.widget.RecyclerView
 import io.realm.Realm
 import org.ole.planet.myplanet.callback.OnHomeItemClickListener
 import org.ole.planet.myplanet.databinding.RowTeamResourceBinding
 import org.ole.planet.myplanet.model.RealmMyCourse
 import org.ole.planet.myplanet.model.RealmMyTeam.Companion.getTeamCreator
 import org.ole.planet.myplanet.ui.courses.TakeCourseFragment
+import org.ole.planet.myplanet.utilities.DiffUtils
 
 class TeamCoursesAdapter(
     private val context: Context,
-    private var list: MutableList<RealmMyCourse>,
     mRealm: Realm?,
     teamId: String?,
     settings: SharedPreferences
-) : RecyclerView.Adapter<TeamCoursesAdapter.ViewHolder>() {
+) : ListAdapter<RealmMyCourse, TeamCoursesAdapter.ViewHolder>(DIFF_CALLBACK) {
     private var listener: OnHomeItemClickListener? = null
     private val settings: SharedPreferences
     private val teamCreator: String
@@ -33,15 +35,13 @@ class TeamCoursesAdapter(
         teamCreator = getTeamCreator(teamId, mRealm)
     }
 
-    fun getList(): List<RealmMyCourse> = list
-
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
         val binding = RowTeamResourceBinding.inflate(LayoutInflater.from(context), parent, false)
         return ViewHolder(binding)
     }
 
     override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        val course = list[position]
+        val course = getItem(position)
         holder.binding.tvTitle.text = course.courseTitle
         holder.binding.tvDescription.text = course.description
         holder.binding.root.setOnClickListener {
@@ -56,9 +56,13 @@ class TeamCoursesAdapter(
         }
     }
 
-    override fun getItemCount(): Int {
-        return list.size
-    }
-
     class ViewHolder(val binding: RowTeamResourceBinding) : RecyclerView.ViewHolder(binding.root)
+
+    companion object {
+        val DIFF_CALLBACK: DiffUtil.ItemCallback<RealmMyCourse> =
+            DiffUtils.itemCallback(
+                areItemsTheSame = { old, new -> old.courseId == new.courseId },
+                areContentsTheSame = { old, new -> old == new }
+            )
+    }
 }

app/src/main/java/org/ole/planet/myplanet/ui/teams/courses/TeamCoursesFragment.kt

@@ -27,12 +27,12 @@ class TeamCoursesFragment : BaseTeamFragment() {
 
     private fun setupCoursesList() {
         val courses = mRealm.where(RealmMyCourse::class.java).`in`("id", team?.courses?.toTypedArray<String>()).findAll()
-        adapterTeamCourse = settings?.let { TeamCoursesAdapter(requireActivity(), courses.toMutableList(), mRealm, teamId, it) }
+        val courseList = mRealm.copyFromRealm(courses)
+        adapterTeamCourse = settings?.let { TeamCoursesAdapter(requireActivity(), mRealm, teamId, it) }
         binding.rvCourse.layoutManager = LinearLayoutManager(activity)
         binding.rvCourse.adapter = adapterTeamCourse
-        adapterTeamCourse?.let {
-            showNoData(binding.tvNodata, it.itemCount, "teamCourses")
-        }
+        adapterTeamCourse?.submitList(courseList)
+        showNoData(binding.tvNodata, courseList.size, "teamCourses")
     }
     override fun onNewsItemClick(news: RealmNews?) {}
     override fun clearImages() {