/*
* Copyright 2018 Allan Wang
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see .
*/
package com.pitchedapps.frost.activities
import android.content.Context
import android.content.Intent
import android.content.res.ColorStateList
import android.graphics.Color
import android.os.Bundle
import android.os.Environment
import android.view.View
import androidx.customview.widget.ViewDragHelper
import ca.allanwang.kau.internal.KauBaseActivity
import ca.allanwang.kau.logging.KauLoggerExtension
import ca.allanwang.kau.mediapicker.scanMedia
import ca.allanwang.kau.permissions.PERMISSION_WRITE_EXTERNAL_STORAGE
import ca.allanwang.kau.permissions.kauRequestPermissions
import ca.allanwang.kau.utils.adjustAlpha
import ca.allanwang.kau.utils.colorToForeground
import ca.allanwang.kau.utils.copyFromInputStream
import ca.allanwang.kau.utils.fadeOut
import ca.allanwang.kau.utils.gone
import ca.allanwang.kau.utils.isHidden
import ca.allanwang.kau.utils.isVisible
import ca.allanwang.kau.utils.materialDialog
import ca.allanwang.kau.utils.scaleXY
import ca.allanwang.kau.utils.setIcon
import ca.allanwang.kau.utils.tint
import ca.allanwang.kau.utils.toast
import ca.allanwang.kau.utils.withAlpha
import ca.allanwang.kau.utils.withMinAlpha
import com.davemorrissey.labs.subscaleview.ImageSource
import com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView
import com.google.android.material.bottomsheet.BottomSheetBehavior
import com.google.android.material.floatingactionbutton.FloatingActionButton
import com.mikepenz.iconics.typeface.IIcon
import com.mikepenz.iconics.typeface.library.googlematerial.GoogleMaterial
import com.pitchedapps.frost.R
import com.pitchedapps.frost.databinding.ActivityImageBinding
import com.pitchedapps.frost.facebook.FB_IMAGE_ID_MATCHER
import com.pitchedapps.frost.facebook.get
import com.pitchedapps.frost.facebook.requests.call
import com.pitchedapps.frost.facebook.requests.getFullSizedImageUrl
import com.pitchedapps.frost.facebook.requests.requestBuilder
import com.pitchedapps.frost.services.LocalService
import com.pitchedapps.frost.utils.ARG_COOKIE
import com.pitchedapps.frost.utils.ARG_IMAGE_URL
import com.pitchedapps.frost.utils.ARG_TEXT
import com.pitchedapps.frost.utils.Prefs
import com.pitchedapps.frost.utils.frostSnackbar
import com.pitchedapps.frost.utils.frostUriFromFile
import com.pitchedapps.frost.utils.isIndirectImageUrl
import com.pitchedapps.frost.utils.logFrostEvent
import com.pitchedapps.frost.utils.sendFrostEmail
import com.pitchedapps.frost.utils.setFrostColors
import java.io.File
import java.io.FileNotFoundException
import java.io.IOException
import java.text.SimpleDateFormat
import java.util.Date
import java.util.Locale
import kotlin.math.abs
import kotlin.math.max
import kotlinx.coroutines.CoroutineExceptionHandler
import kotlinx.coroutines.Deferred
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.async
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
/**
* Created by Allan Wang on 2017-07-15.
*/
class ImageActivity : KauBaseActivity() {
@Volatile
internal var errorRef: Throwable? = null
/**
* Reference to the temporary file path
*/
internal lateinit var tempFile: File
/**
* Reference to path for downloaded image
* Nonnull once the image is downloaded by the user
*/
internal var savedFile: File? = null
/**
* Indicator for fab's click result
*/
internal var fabAction: FabStates = FabStates.NOTHING
set(value) {
if (field == value) return
field = value
value.update(binding.imageFab)
}
private lateinit var dragHelper: ViewDragHelper
private var imgExtension: String = ".jpg"
companion object {
/**
* Cache folder to store images
* Linked to the uri provider
*/
private const val IMAGE_FOLDER = "images"
private const val TIME_FORMAT = "yyyyMMdd_HHmmss"
private const val IMG_TAG = "Frost"
const val PURGE_TIME: Long = 10 * 60 * 1000 // 10 min block
private val L = KauLoggerExtension("Image", com.pitchedapps.frost.utils.L)
fun cacheDir(context: Context): File =
File(context.cacheDir, IMAGE_FOLDER)
}
private val cookie: String? by lazy { intent.getStringExtra(ARG_COOKIE) }
val imageUrl: String by lazy { intent.getStringExtra(ARG_IMAGE_URL)?.trim('"') ?: "" }
private lateinit var trueImageUrl: Deferred
private val imageText: String? by lazy { intent.getStringExtra(ARG_TEXT) }
// a unique image identifier based on the id (if it exists), and its hash
private val imageHash: String by lazy {
"${abs(FB_IMAGE_ID_MATCHER.find(imageUrl)[1]?.hashCode() ?: 0)}_${abs(imageUrl.hashCode())}"
}
private lateinit var binding: ActivityImageBinding
private var bottomBehavior: BottomSheetBehavior? = null
private val baseBackgroundColor = if (Prefs.blackMediaBg) Color.BLACK
else Prefs.bgColor.withMinAlpha(235)
private fun loadError(e: Throwable) {
if (e.message?.contains("") == true) {
applicationContext.toast(R.string.image_not_found)
finish()
return
}
errorRef = e
e.logFrostEvent("Image load error")
with(binding) {
if (imageProgress.isVisible)
imageProgress.fadeOut()
}
tempFile.delete()
fabAction = FabStates.ERROR
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
if (imageUrl.isEmpty()) {
return finish()
}
L.i { "Displaying image" }
trueImageUrl = async(Dispatchers.IO) {
val result = if (!imageUrl.isIndirectImageUrl) imageUrl
else cookie?.getFullSizedImageUrl(imageUrl) ?: imageUrl
if (result != imageUrl)
L.v { "Launching with true url $result" }
result
}
binding = ActivityImageBinding.inflate(layoutInflater)
setContentView(binding.root)
binding.onCreate()
tempFile = File(cacheDir(this), imageHash)
launch(CoroutineExceptionHandler { _, throwable -> loadError(throwable) }) {
downloadImageTo(tempFile)
binding.imageProgress.fadeOut()
binding.imagePhoto.setImage(ImageSource.uri(frostUriFromFile(tempFile)))
fabAction = FabStates.DOWNLOAD
binding.imagePhoto.animate().alpha(1f).scaleXY(1f).start()
}
}
private fun ActivityImageBinding.onCreate() {
imageContainer.setBackgroundColor(baseBackgroundColor)
this@ImageActivity.imageText.also { text ->
if (text.isNullOrBlank()) {
imageText.gone()
} else {
imageText.setTextColor(if (Prefs.blackMediaBg) Color.WHITE else Prefs.textColor)
imageText.setBackgroundColor(
(if (Prefs.blackMediaBg) Color.BLACK else Prefs.bgColor)
.colorToForeground(0.2f).withAlpha(255)
)
imageText.text = text
bottomBehavior = BottomSheetBehavior.from(imageText).apply {
setBottomSheetCallback(object : BottomSheetBehavior.BottomSheetCallback() {
override fun onSlide(bottomSheet: View, slideOffset: Float) {
if (slideOffset == 0f && !imageFab.isShown) imageFab.show()
else if (slideOffset != 0f && imageFab.isShown) imageFab.hide()
imageText.alpha = slideOffset / 2 + 0.5f
}
override fun onStateChanged(bottomSheet: View, newState: Int) {
// No op
}
})
}
imageText.bringToFront()
}
}
imageProgress.tint(if (Prefs.blackMediaBg) Color.WHITE else Prefs.accentColor)
imageFab.setOnClickListener { fabAction.onClick(this@ImageActivity) }
imagePhoto.setOnImageEventListener(object :
SubsamplingScaleImageView.DefaultOnImageEventListener() {
override fun onImageLoadError(e: Exception) {
loadError(e)
}
})
setFrostColors {
themeWindow = false
}
dragHelper = ViewDragHelper.create(imageDrag, ViewDragCallback()).apply {
setEdgeTrackingEnabled(ViewDragHelper.EDGE_TOP or ViewDragHelper.EDGE_BOTTOM)
}
imageDrag.dragHelper = dragHelper
imageDrag.viewToIgnore = imageText
}
private inner class ViewDragCallback : ViewDragHelper.Callback() {
private var scrollPercent: Float = 0f
private var scrollThreshold = 0.5f
private var scrollToTop = false
override fun tryCaptureView(view: View, i: Int): Boolean {
L.d { "Try capture ${view.id} $i ${binding.imagePhoto.id} ${binding.imageText.id}" }
return view === binding.imagePhoto
}
override fun getViewHorizontalDragRange(child: View): Int = 0
override fun getViewVerticalDragRange(child: View): Int = child.height
override fun onViewPositionChanged(
changedView: View,
left: Int,
top: Int,
dx: Int,
dy: Int
) {
super.onViewPositionChanged(changedView, left, top, dx, dy)
with(binding) {
// make sure that we are using the proper axis
scrollPercent = abs(top.toFloat() / imageContainer.height)
scrollToTop = top < 0
val multiplier = max(1f - scrollPercent, 0f)
imageFab.alpha = multiplier
bottomBehavior?.also {
imageText.alpha =
multiplier * (if (it.state == BottomSheetBehavior.STATE_COLLAPSED) 0.5f else 1f)
}
imageContainer.setBackgroundColor(baseBackgroundColor.adjustAlpha(multiplier))
if (scrollPercent >= 1) {
if (!isFinishing) {
finish()
overridePendingTransition(0, 0)
}
}
}
}
override fun onViewReleased(releasedChild: View, xvel: Float, yvel: Float) {
val overScrolled = scrollPercent > scrollThreshold
val maxOffset = releasedChild.height + 10
val finalTop = when {
scrollToTop && (overScrolled || yvel < -dragHelper.minVelocity) -> -maxOffset
!scrollToTop && (overScrolled || yvel > dragHelper.minVelocity) -> maxOffset
else -> 0
}
dragHelper.settleCapturedViewAt(0, finalTop)
binding.imageDrag.invalidate()
}
override fun clampViewPositionHorizontal(child: View, left: Int, dx: Int): Int = 0
override fun clampViewPositionVertical(child: View, top: Int, dy: Int): Int = top
}
private fun getImageExtension(type: String?): String? {
if (type?.startsWith("image/") != true) {
return null
}
return when (type.substring(6)) {
"jpeg" -> ".jpg"
"png" -> ".png"
"gif" -> ".gif"
else -> null
}
}
@Throws(IOException::class)
private fun createPublicMediaFile(): File {
val timeStamp = SimpleDateFormat(TIME_FORMAT, Locale.getDefault()).format(Date())
val imageFileName = "${IMG_TAG}_${timeStamp}_"
val storageDir =
Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES)
val frostDir = File(storageDir, IMG_TAG)
if (!frostDir.exists()) frostDir.mkdirs()
return File.createTempFile(imageFileName, imgExtension, frostDir)
}
/**
* Saves the image to the specified file, creating it if it doesn't exist.
* Returns true if a change is made, false otherwise.
* Throws an error if something goes wrong.
*/
@Throws(IOException::class)
private suspend fun downloadImageTo(file: File): Boolean {
val exceptionHandler = CoroutineExceptionHandler { _, err ->
if (file.isFile && file.length() == 0L) {
file.delete()
}
throw err
}
return withContext(Dispatchers.IO + exceptionHandler) {
if (!file.isFile) {
file.parentFile?.mkdirs()
file.createNewFile()
} else {
file.setLastModified(System.currentTimeMillis())
}
// Forbid overwrites
if (file.isFile && file.length() > 0) {
L.i { "Forbid image overwrite" }
return@withContext false
}
// Fast route, image is already downloaded
if (tempFile.isFile && tempFile.length() > 0) {
if (tempFile == file) {
return@withContext false
}
tempFile.copyTo(file, true)
return@withContext true
}
// No temp file, download ourselves
val response = cookie.requestBuilder()
.url(trueImageUrl.await())
.get()
.call()
.execute()
if (!response.isSuccessful) {
throw IOException("Unsuccessful response for image: ${response.peekBody(128).string()}")
}
imgExtension = getImageExtension(response.header("Content-Type")) ?: ".jpg"
val body = response.body ?: throw IOException("Failed to retrieve image body")
file.copyFromInputStream(body.byteStream())
return@withContext true
}
}
internal fun saveImage() {
kauRequestPermissions(PERMISSION_WRITE_EXTERNAL_STORAGE) { granted, _ ->
L.d { "Download image callback granted: $granted" }
if (granted) {
val errorHandler = CoroutineExceptionHandler { _, throwable ->
loadError(throwable)
frostSnackbar(R.string.image_download_fail)
}
launch(errorHandler) {
val destination = createPublicMediaFile()
downloadImageTo(destination)
L.d { "Download image async finished" }
scanMedia(destination)
savedFile = destination
frostSnackbar(R.string.image_download_success)
fabAction = FabStates.SHARE
}
}
}
}
override fun onDestroy() {
LocalService.schedule(this, LocalService.Flag.PURGE_IMAGE)
super.onDestroy()
}
}
internal enum class FabStates(
val iicon: IIcon,
val iconColor: Int = Prefs.iconColor,
val backgroundTint: Int = Int.MAX_VALUE
) {
ERROR(GoogleMaterial.Icon.gmd_error, Color.WHITE, Color.RED) {
override fun onClick(activity: ImageActivity) {
val err =
activity.errorRef?.takeIf { it !is FileNotFoundException && it.message != "Image failed to decode using JPEG decoder" }
?: return
activity.materialDialog {
title(R.string.kau_error)
message(R.string.bad_image_overlay)
positiveButton(R.string.kau_yes) {
activity.sendFrostEmail(R.string.debug_image_link_subject) {
addItem("Url", activity.imageUrl)
addItem("Type", err.javaClass.name)
addItem("Message", err.message ?: "Null")
}
}
negativeButton(R.string.kau_no)
}
}
},
NOTHING(GoogleMaterial.Icon.gmd_adjust) {
override fun onClick(activity: ImageActivity) {}
},
DOWNLOAD(GoogleMaterial.Icon.gmd_file_download) {
override fun onClick(activity: ImageActivity) = activity.saveImage()
},
SHARE(GoogleMaterial.Icon.gmd_share) {
override fun onClick(activity: ImageActivity) {
try {
val photoURI = activity.frostUriFromFile(activity.savedFile!!)
val intent = Intent(Intent.ACTION_SEND).apply {
flags = Intent.FLAG_ACTIVITY_NEW_TASK
putExtra(Intent.EXTRA_STREAM, photoURI)
type = "image/png"
}
activity.startActivity(intent)
} catch (e: Exception) {
activity.errorRef = e
e.logFrostEvent("Image share failed")
activity.frostSnackbar(R.string.image_share_failed)
}
}
};
/**
* Change the fab look
* If it's in view, give it some animations
*
* TODO investigate what is wrong with fadeScaleTransition
*
* https://github.com/AllanWang/KAU/issues/184
*
*/
fun update(fab: FloatingActionButton) {
val tint = if (backgroundTint != Int.MAX_VALUE) backgroundTint else Prefs.accentColor
if (fab.isHidden) {
fab.setIcon(iicon, color = iconColor)
fab.backgroundTintList = ColorStateList.valueOf(tint)
fab.show()
} else {
fab.hide(object : FloatingActionButton.OnVisibilityChangedListener() {
override fun onHidden(fab: FloatingActionButton) {
fab.setIcon(iicon, color = iconColor)
fab.show()
}
})
}
}
abstract fun onClick(activity: ImageActivity)
}