Initial commit

app/src/main/java/com/michatec/radio/dialogs/AddStationDialog.kt

@@ -0,0 +1,133 @@
+/*
+ * AddStationDialog.kt
+ * Implements the AddStationDialog class
+ * A AddStationDialog shows a dialog with list of stations to import
+ *
+ * This file is part of
+ * TRANSISTOR - Radio App for Android
+ *
+ * Copyright (c) 2015-23 - Y20K.org
+ * Licensed under the MIT-License
+ * http://opensource.org/licenses/MIT
+ */
+
+
+package com.michatec.radio.dialogs
+
+import android.content.Context
+import android.view.LayoutInflater
+import androidx.appcompat.app.AlertDialog
+import androidx.recyclerview.widget.DefaultItemAnimator
+import androidx.recyclerview.widget.LinearLayoutManager
+import androidx.recyclerview.widget.RecyclerView
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.michatec.radio.R
+import com.michatec.radio.core.Station
+import com.michatec.radio.search.SearchResultAdapter
+
+
+/*
+ * AddStationDialog class
+ */
+class AddStationDialog (
+    private val context: Context,
+    private val stationList: List<Station>,
+    private val listener: AddStationDialogListener) :
+    SearchResultAdapter.SearchResultAdapterListener {
+
+
+    /* Interface used to communicate back to activity */
+    interface AddStationDialogListener {
+        fun onAddStationDialog(station: Station)
+    }
+
+
+    /* Define log tag */
+    private val TAG = AddStationDialog::class.java.simpleName
+
+
+    /* Main class variables */
+    private lateinit var dialog: AlertDialog
+    private lateinit var stationSearchResultList: RecyclerView
+    private lateinit var searchResultAdapter: SearchResultAdapter
+    private var station: Station = Station()
+
+
+    /* Overrides onSearchResultTapped from SearchResultAdapterListener */
+    override fun onSearchResultTapped(result: Station) {
+        station = result
+        // make add button clickable
+        activateAddButton()
+    }
+
+
+    /* Construct and show dialog */
+    fun show() {
+        // prepare dialog builder
+        val builder = MaterialAlertDialogBuilder(context)
+
+        // set title
+        builder.setTitle(R.string.dialog_add_station_title)
+
+        // get views
+        val inflater = LayoutInflater.from(context)
+        val view = inflater.inflate(R.layout.dialog_add_station, null)
+        stationSearchResultList = view.findViewById(R.id.station_list)
+
+        // set up list of search results
+        setupRecyclerView(context)
+
+        // add okay ("Add") button
+        builder.setPositiveButton(R.string.dialog_find_station_button_add) { _, _ ->
+            // listen for click on add button
+            listener.onAddStationDialog(station)
+            searchResultAdapter.stopPrePlayback()
+        }
+        // add cancel button
+        builder.setNegativeButton(R.string.dialog_generic_button_cancel) { _, _ ->
+            searchResultAdapter.stopPrePlayback()
+        }
+        // handle outside-click as "no"
+        builder.setOnCancelListener {
+            searchResultAdapter.stopPrePlayback()
+        }
+
+        // set dialog view
+        builder.setView(view)
+
+        // create and display dialog
+        dialog = builder.create()
+        dialog.show()
+
+        // initially disable "Add" button
+        dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
+    }
+
+
+    /* Sets up list of results (RecyclerView) */
+    private fun setupRecyclerView(context: Context) {
+        searchResultAdapter = SearchResultAdapter(this, stationList)
+        stationSearchResultList.adapter = searchResultAdapter
+        val layoutManager: LinearLayoutManager = object: LinearLayoutManager(context) {
+            override fun supportsPredictiveItemAnimations(): Boolean {
+                return true
+            }
+        }
+        stationSearchResultList.layoutManager = layoutManager
+        stationSearchResultList.itemAnimator = DefaultItemAnimator()
+    }
+
+
+    /* Implement activateAddButton to enable the "Add" button */
+    override fun activateAddButton() {
+        dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = true
+    }
+
+
+    /* Implement deactivateAddButton to disable the "Add" button */
+    override fun deactivateAddButton() {
+        dialog.getButton(AlertDialog.BUTTON_POSITIVE).isEnabled = false
+    }
+
+
+}