/*
* 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 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.colorToForeground
import ca.allanwang.kau.utils.copyFromInputStream
import ca.allanwang.kau.utils.fadeOut
import ca.allanwang.kau.utils.fadeScaleTransition
import ca.allanwang.kau.utils.isHidden
import ca.allanwang.kau.utils.isVisible
import ca.allanwang.kau.utils.scaleXY
import ca.allanwang.kau.utils.setIcon
import ca.allanwang.kau.utils.tint
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.floatingactionbutton.FloatingActionButton
import com.mikepenz.google_material_typeface_library.GoogleMaterial
import com.mikepenz.iconics.typeface.IIcon
import com.pitchedapps.frost.R
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.L
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.materialDialogThemed
import com.pitchedapps.frost.utils.sendFrostEmail
import com.pitchedapps.frost.utils.setFrostColors
import com.sothree.slidinguppanel.SlidingUpPanelLayout
import kotlinx.android.synthetic.main.activity_image.*
import kotlinx.coroutines.CoroutineExceptionHandler
import kotlinx.coroutines.Deferred
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.async
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
import java.io.File
import java.io.IOException
import java.text.SimpleDateFormat
import java.util.Date
import java.util.Locale
/**
* 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(image_fab)
}
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"
private const val IMG_EXTENSION = ".png"
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 {
"${Math.abs(
FB_IMAGE_ID_MATCHER.find(imageUrl)[1]?.hashCode()
?: 0
)}_${Math.abs(imageUrl.hashCode())}"
}
private fun loadError(e: Throwable) {
errorRef = e
e.logFrostEvent("Image load error")
if (image_progress.isVisible)
image_progress.fadeOut()
tempFile.delete()
fabAction = FabStates.ERROR
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
intent?.extras ?: return finish()
L.i { "Displaying image" }
trueImageUrl = async(Dispatchers.IO) {
val result = if (!imageUrl.isIndirectImageUrl) imageUrl
else cookie?.getFullSizedImageUrl(imageUrl)?.blockingGet() ?: imageUrl
if (result != imageUrl)
L.v { "Launching with true url $result" }
result
}
val layout = if (!imageText.isNullOrBlank()) R.layout.activity_image else R.layout.activity_image_textless
setContentView(layout)
image_container.setBackgroundColor(
if (Prefs.blackMediaBg) Color.BLACK
else Prefs.bgColor.withMinAlpha(222)
)
image_text?.setTextColor(if (Prefs.blackMediaBg) Color.WHITE else Prefs.textColor)
image_text?.setBackgroundColor(
(if (Prefs.blackMediaBg) Color.BLACK else Prefs.bgColor)
.colorToForeground(0.2f).withAlpha(255)
)
image_text?.text = imageText
image_progress.tint(if (Prefs.blackMediaBg) Color.WHITE else Prefs.accentColor)
image_panel?.addPanelSlideListener(object : SlidingUpPanelLayout.SimplePanelSlideListener() {
override fun onPanelSlide(panel: View, slideOffset: Float) {
if (slideOffset == 0f && !image_fab.isShown) image_fab.show()
else if (slideOffset != 0f && image_fab.isShown) image_fab.hide()
image_text?.alpha = slideOffset / 2 + 0.5f
}
})
image_fab.setOnClickListener { fabAction.onClick(this) }
image_photo.setOnImageEventListener(object : SubsamplingScaleImageView.DefaultOnImageEventListener() {
override fun onImageLoadError(e: Exception) {
loadError(e)
}
})
setFrostColors {
themeWindow = false
}
tempFile = File(cacheDir(this), imageHash)
launch(CoroutineExceptionHandler { _, throwable -> loadError(throwable) }) {
downloadImageTo(tempFile)
image_progress.fadeOut()
image_photo.setImage(ImageSource.uri(frostUriFromFile(tempFile)))
fabAction = FabStates.DOWNLOAD
image_photo.animate().alpha(1f).scaleXY(1f).start()
}
}
@Throws(IOException::class)
private fun createPublicMediaFile(): File {
val timeStamp = SimpleDateFormat(TIME_FORMAT, Locale.getDefault()).format(Date())
val imageFileName = "${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, IMG_EXTENSION, 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.length() > 0) {
L.i { "Forbid image overwrite" }
return@withContext false
}
if (tempFile.isFile && tempFile.length() > 0) {
if (tempFile == file) {
return@withContext false
}
tempFile.copyTo(file)
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()}")
}
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) {
activity.materialDialogThemed {
title(R.string.kau_error)
content(R.string.bad_image_overlay)
positiveText(R.string.kau_yes)
onPositive { _, _ ->
if (activity.errorRef != null)
L.e(activity.errorRef) { "ImageActivity error report" }
activity.sendFrostEmail(R.string.debug_image_link_subject) {
addItem("Url", activity.imageUrl)
addItem("Message", activity.errorRef?.message ?: "Null")
}
}
negativeText(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
*/
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.fadeScaleTransition {
setIcon(iicon, color = iconColor)
backgroundTintList = ColorStateList.valueOf(tint)
}
}
}
abstract fun onClick(activity: ImageActivity)
}