Show location history

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/* Copyright 2022 Esri
 *
 * 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
 *
 *    http://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.esri.arcgismaps.sample.showlocationhistory

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.databinding.DataBindingUtil
import androidx.lifecycle.lifecycleScope
import com.arcgismaps.ApiKey
import com.arcgismaps.ArcGISEnvironment
import com.arcgismaps.Color
import com.arcgismaps.geometry.Geometry
import com.arcgismaps.geometry.Point
import com.arcgismaps.geometry.Polyline
import com.arcgismaps.geometry.PolylineBuilder
import com.arcgismaps.geometry.SpatialReference
import com.arcgismaps.location.LocationDisplayAutoPanMode
import com.arcgismaps.location.SimulatedLocationDataSource
import com.arcgismaps.location.SimulationParameters
import com.arcgismaps.mapping.ArcGISMap
import com.arcgismaps.mapping.BasemapStyle
import com.arcgismaps.mapping.Viewpoint
import com.arcgismaps.mapping.symbology.SimpleLineSymbol
import com.arcgismaps.mapping.symbology.SimpleLineSymbolStyle
import com.arcgismaps.mapping.symbology.SimpleMarkerSymbol
import com.arcgismaps.mapping.symbology.SimpleMarkerSymbolStyle
import com.arcgismaps.mapping.symbology.SimpleRenderer
import com.arcgismaps.mapping.view.Graphic
import com.arcgismaps.mapping.view.GraphicsOverlay
import com.esri.arcgismaps.sample.showlocationhistory.databinding.ActivityMainBinding
import com.google.android.material.snackbar.Snackbar
import kotlinx.coroutines.launch
import java.time.Instant

class MainActivity : AppCompatActivity() {

    private var isTrackLocation: Boolean = false

    // set up data binding for the activity
    private val activityMainBinding: ActivityMainBinding by lazy {
        DataBindingUtil.setContentView(this, R.layout.activity_main)
    }

    private val mapView by lazy {
        activityMainBinding.mapView
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // authentication with an API key or named user is
        // required to access basemaps and other location services
        ArcGISEnvironment.apiKey = ApiKey.create(BuildConfig.API_KEY)
        lifecycle.addObserver(mapView)

        // create a center point for the data in West Los Angeles, California
        val center = Point(-13185535.98, 4037766.28, SpatialReference(102100))

        // create a graphics overlay for the points and use a red circle for the symbols
        val locationHistoryOverlay = GraphicsOverlay()
        val locationSymbol = SimpleMarkerSymbol(SimpleMarkerSymbolStyle.Circle, Color.red, 10f)
        locationHistoryOverlay.renderer = SimpleRenderer(locationSymbol)

        // create a graphics overlay for the lines connecting the points and use a blue line for the symbol
        val locationHistoryLineOverlay = GraphicsOverlay()
        val locationLineSymbol = SimpleLineSymbol(SimpleLineSymbolStyle.Solid, Color.green, 2.0f)
        locationHistoryLineOverlay.renderer = SimpleRenderer(locationLineSymbol)

        mapView.apply {
            // create and add a map with a navigation night basemap style
            map = ArcGISMap(BasemapStyle.ArcGISNavigationNight)
            setViewpoint(Viewpoint(center, 7000.0))
            graphicsOverlays.addAll(listOf(locationHistoryOverlay, locationHistoryLineOverlay))
        }

        // create a polyline builder to connect the location points
        val polylineBuilder = PolylineBuilder(SpatialReference(102100))

        // create a simulated location data source from json data with simulation parameters to set a consistent velocity
        val simulatedLocationDataSource = SimulatedLocationDataSource(
            Geometry.fromJsonOrNull(getString(R.string.polyline_data)) as Polyline,
            SimulationParameters(Instant.now(), 30.0, 0.0, 0.0)
        )

        // coroutine scope to collect data source location changes
        lifecycleScope.launch {
            simulatedLocationDataSource.locationChanged.collect { location ->
                // if location tracking is turned off, do not add to the polyline
                if (!isTrackLocation) {
                    return@collect
                }
                // get the point from the location
                val nextPoint = location.position
                // add the new point to the polyline builder
                polylineBuilder.addPoint(nextPoint)
                // add the new point to the two graphics overlays and reset the line connecting the points
                locationHistoryOverlay.graphics.add(Graphic(nextPoint))
                locationHistoryLineOverlay.graphics.apply {
                    clear()
                    add((Graphic(polylineBuilder.toGeometry())))
                }
            }
        }

        // configure the map view's location display to follow the simulated location data source
        mapView.locationDisplay.apply {
            dataSource = simulatedLocationDataSource
            setAutoPanMode(LocationDisplayAutoPanMode.Recenter)
            initialZoomScale = 7000.0
        }

        // coroutine scope to set a tap event on the map view
        lifecycleScope.launch {
            mapView.onSingleTapConfirmed.collect {
                if (mapView.locationDisplay.autoPanMode.value == LocationDisplayAutoPanMode.Off) {
                    mapView.locationDisplay.setAutoPanMode(LocationDisplayAutoPanMode.Recenter)
                }
                if (isTrackLocation) {
                    isTrackLocation = false
                    Snackbar.make(mapView, "Tracking has stopped", Snackbar.LENGTH_INDEFINITE).show()
                } else {
                    isTrackLocation = true
                    Snackbar.make(mapView, "Tracking has started", Snackbar.LENGTH_INDEFINITE ).show()
                }
            }
        }

        // coroutine scope to start the simulated location data source
        lifecycleScope.launch {
            simulatedLocationDataSource.start()
        }
    }
}