Initial release

app/src/main/java/com/futbollibre/tv/ChannelCardPresenter.kt

@@ -0,0 +1,120 @@
+package com.futbollibre.tv
+
+import android.content.Context
+import android.graphics.drawable.Drawable
+import android.view.ViewGroup
+import androidx.core.content.ContextCompat
+import androidx.leanback.widget.ImageCardView
+import androidx.leanback.widget.Presenter
+import coil.imageLoader
+import coil.request.ImageRequest
+import com.futbollibre.tv.model.Channel
+
+/**
+ * Presenter for displaying agenda items as cards in the Leanback UI.
+ */
+class ChannelCardPresenter(
+    private val context: Context,
+    private val cardWidth: Int = 300,
+    private val cardHeight: Int = 200
+) : Presenter() {
+
+    companion object {
+        private const val TAG = "ChannelCardPresenter"
+    }
+
+    private var defaultCardImage: Drawable? = null
+    private var selectedBackgroundColor: Int = 0
+    private var defaultBackgroundColor: Int = 0
+
+    init {
+        initColors()
+    }
+
+    private fun initColors() {
+        defaultBackgroundColor = ContextCompat.getColor(context, R.color.card_background)
+        selectedBackgroundColor = ContextCompat.getColor(context, R.color.card_selected_background)
+        defaultCardImage = ContextCompat.getDrawable(context, R.drawable.ic_channel_default)
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup): ViewHolder {
+        val cardView = ImageCardView(context).apply {
+            cardType = ImageCardView.CARD_TYPE_INFO_UNDER
+            isFocusable = true
+            isFocusableInTouchMode = true
+            setMainImageDimensions(cardWidth, cardHeight)
+
+            // Set background colors
+            setBackgroundColor(defaultBackgroundColor)
+        }
+
+        return ViewHolder(cardView)
+    }
+
+    override fun onBindViewHolder(viewHolder: ViewHolder, item: Any) {
+        val channel = item as Channel
+        val cardView = viewHolder.view as ImageCardView
+
+        cardView.titleText = channel.name
+
+        val contentText = channel.summary ?: if (channel.streamUrls.isNotEmpty()) {
+            "${channel.streamUrls.size} opciones"
+        } else {
+            "Sin opciones"
+        }
+        cardView.contentText = contentText
+
+        cardView.setBackgroundColor(defaultBackgroundColor)
+
+        if (!channel.logoUrl.isNullOrEmpty()) {
+            loadChannelLogo(cardView, channel.logoUrl)
+        } else {
+            cardView.mainImage = defaultCardImage
+        }
+    }
+
+    override fun onUnbindViewHolder(viewHolder: ViewHolder) {
+        val cardView = viewHolder.view as ImageCardView
+        cardView.badgeImage = null
+        cardView.mainImage = null
+    }
+
+    override fun onViewAttachedToWindow(viewHolder: ViewHolder) {
+        super.onViewAttachedToWindow(viewHolder)
+    }
+
+    private fun loadChannelLogo(cardView: ImageCardView, logoUrl: String) {
+        cardView.mainImage = defaultCardImage
+        loadImageAsync(cardView, logoUrl)
+    }
+
+    private fun loadImageAsync(cardView: ImageCardView, url: String) {
+        val imageLoader = context.imageLoader
+        val request = ImageRequest.Builder(context)
+            .data(url)
+            .target(
+                onStart = {
+                    cardView.mainImage = defaultCardImage
+                },
+                onSuccess = { drawable ->
+                    cardView.mainImage = drawable
+                },
+                onError = {
+                    cardView.mainImage = defaultCardImage
+                }
+            )
+            .build()
+
+        imageLoader.enqueue(request)
+    }
+
+    fun onItemSelected(viewHolder: ViewHolder) {
+        val cardView = viewHolder.view as ImageCardView
+        cardView.setBackgroundColor(selectedBackgroundColor)
+    }
+
+    fun onItemUnselected(viewHolder: ViewHolder) {
+        val cardView = viewHolder.view as ImageCardView
+        cardView.setBackgroundColor(defaultBackgroundColor)
+    }
+}