MainActivity.kt

/*
 * Copyright 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example.jetnews.ui

import android.content.Intent
import android.net.Uri
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.activity.enableEdgeToEdge
import androidx.compose.material3.windowsizeclass.ExperimentalMaterial3WindowSizeClassApi
import androidx.compose.material3.windowsizeclass.calculateWindowSizeClass
import androidx.navigation3.runtime.NavKey
import com.example.jetnews.JetnewsApplication
import com.example.jetnews.ui.navigation.HomeKey
import com.example.jetnews.ui.navigation.POST_ID

class MainActivity : ComponentActivity() {

    @OptIn(ExperimentalMaterial3WindowSizeClassApi::class)
    override fun onCreate(savedInstanceState: Bundle?) {
        enableEdgeToEdge()
        super.onCreate(savedInstanceState)

        val appContainer = (application as JetnewsApplication).container
        setContent {
            val widthSizeClass = calculateWindowSizeClass(this).widthSizeClass
            JetnewsApp(appContainer, widthSizeClass, getDeepLinkKey(intent))
        }
    }
}

private fun getDeepLinkKey(intent: Intent): HomeKey? {
    val uri: Uri = intent.data ?: return null
    val pathParams = uri.pathSegments
    if (pathParams.lastOrNull() != "home") return null

    val queryParams = uri.getQueryParameters(POST_ID)
    if (queryParams.isEmpty() || queryParams.size > 1) return null
    // "https://developer.android.com/jetnews/home?postId={$POST_ID}"
    return HomeKey(postId = Uri.decode(queryParams.firstOrNull()))
}