MainActivity.kt

import android.os.Bundle
import androidx.activity.compose.setContent
import androidx.appcompat.app.AppCompatActivity
import androidx.compose.foundation.BorderStroke
import androidx.compose.foundation.Image
import androidx.compose.foundation.background
import androidx.compose.foundation.clickable
import androidx.compose.foundation.layout.*
import androidx.compose.foundation.shape.CircleShape
import androidx.compose.foundation.shape.RoundedCornerShape
import androidx.compose.material.Card
import androidx.compose.material.MaterialTheme
import androidx.compose.material.Surface
import androidx.compose.material.Text
import androidx.compose.runtime.Composable
import androidx.compose.runtime.MutableState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.draw.clip
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.layout.ContentScale
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.tooling.preview.Preview
import androidx.compose.ui.unit.dp
import com.codingtroops.composesample.R

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        val mockUserProfile = UserProfile.getMockProfileUser()
        setContent { MainActivityComposable(mockUserProfile) }
    }
}

@Composable
fun MainActivityComposable(userProfile: UserProfile) {
    Surface(
        modifier = Modifier.fillMaxSize(),
        color = Helper.getGreenColor()
    )
    { ProfileCardComposable(userProfile) }
}

@Composable
fun ProfileCardComposable(userProfile: UserProfile) {
    val onlineStatus = remember { mutableStateOf(userProfile.isOnline) }

    Card(
        modifier = Modifier
            .wrapContentSize()
            .clickable(onClick = { onlineStatus.value = onlineStatus.value.not() })
            .clip(RoundedCornerShape(4.dp))
            .background(color = Helper.getWhiteColor())
            .padding(16.dp),
    ) {
        Row(modifier = Modifier.height(intrinsicSize = IntrinsicSize.Max)) {
            ProfilePictureComposable(onlineStatus, userProfile.profilePictureDrawableId)
            ProfileContentComposable(onlineStatus, userProfile.name, userProfile.lastActivityMinutes)
        }
    }
}

@Composable
fun ProfilePictureComposable(onlineStatus: MutableState<Boolean>, pictureDrawableId: Int) {
    Card(
        shape = CircleShape,
        border = BorderStroke(2.dp, color = if(onlineStatus.value)
            Helper.getGreenColor()
        else
            Helper.getRedColor()),
        modifier = Modifier
            .size(48.dp),
        elevation = 4.dp
    ) {
        Image(
            painter = painterResource(id = pictureDrawableId),
            contentScale = ContentScale.Crop,
            modifier = Modifier.size(48.dp),
            contentDescription = "Profile picture holder"
        )
    }
}

@Composable
fun ProfileContentComposable(onlineStatus: MutableState<Boolean>, name: String, lastActivityMinutes: Int) {
    Column(
        modifier = Modifier
            .fillMaxHeight()
            .padding(start = 8.dp),
        verticalArrangement = Arrangement.aligned(Alignment.CenterVertically)
    ) {
        Text(name, fontWeight = FontWeight.Bold)
        Text(
            text = if (onlineStatus.value)
                "Active now"
            else
                "$lastActivityMinutes mins ago",
            style = MaterialTheme.typography.body2
        )
    }
}

@Preview
@Composable
fun UserProfileCardPreview() {
    val mockUserProfile = UserProfile.getMockProfileUser()
    MainActivityComposable(mockUserProfile)
}

data class UserProfile(
    val name: String,
    val profilePictureDrawableId: Int,
    val lastActivityMinutes: Int,
    val isOnline: Boolean
) {
    companion object {
        fun getMockProfileUser() = UserProfile("Catalin Ghita",
            R.drawable.profile_pic,
            2,
            true)
    }
}

object Helper {

    fun getColor(colorString: String) =
        Color(android.graphics.Color.parseColor("#$colorString"))

    fun getGreenColor() = getColor("9963890a")
    fun getWhiteColor() = getColor("FFFFFFFF")
    fun getRedColor() = getColor("99ac162c")

}