Store article images in cache in background.

app/src/main/java/apps/amine/bou/readerforselfoss/api/selfoss/SelfossModels.kt

@@ -5,10 +5,15 @@ import android.net.Uri
 import android.os.Parcel
 import android.os.Parcelable
 import android.text.Html
+import android.util.Log
+import android.webkit.URLUtil
 import org.jsoup.Jsoup
 
 import apps.amine.bou.readerforselfoss.utils.Config
 import apps.amine.bou.readerforselfoss.utils.isEmptyOrNullOrNullString
+import com.bumptech.glide.Glide
+import com.bumptech.glide.load.engine.DiskCacheStrategy
+import com.bumptech.glide.request.RequestOptions
 import com.google.gson.annotations.SerializedName
 
 private fun constructUrl(config: Config?, path: String, file: String?): String {
@@ -138,6 +143,30 @@ data class Item(
         return allImages
     }
 
+    fun preloadImages(context: Context) : Boolean {
+        val imageUrls = this.getImages()
+        Log.d("Carica", "Caricando immagini")
+
+        val glideOptions = RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.ALL)
+
+
+        try {
+            for (url in imageUrls) {
+                Log.d("Carica", url)
+                if ( URLUtil.isValidUrl(url)) {
+                    val image = Glide.with(context).asBitmap()
+                            .apply(glideOptions)
+                            .load(url).submit().get()
+                }
+                Log.d("Carica", "Immagine presa")
+            }
+        } catch (e : Error) {
+            return false
+        }
+
+        return true
+    }
+
     fun getTitleDecoded(): String {
         return Html.fromHtml(title).toString()
     }

app/src/main/java/apps/amine/bou/readerforselfoss/background/background.kt

@@ -104,6 +104,7 @@ class LoadingWorker(val context: Context, params: WorkerParameters) : Worker(con
                                     notificationManager.notify(2, newItemsNotification.build())
                                 }
                             }
+                            apiItems.map {it.preloadImages(context)}
                         }
                         Timer("", false).schedule(4000) {
                             notificationManager.cancel(1)

app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ArticleFragment.kt

@@ -5,6 +5,7 @@ import android.content.Intent
 import android.content.SharedPreferences
 import android.content.res.ColorStateList
 import android.content.res.TypedArray
+import android.graphics.Bitmap
 import android.graphics.Typeface
 import android.graphics.drawable.ColorDrawable
 import android.net.Uri
@@ -12,12 +13,12 @@ import android.os.Build
 import android.os.Bundle
 import android.preference.PreferenceManager
 import android.view.*
+import android.webkit.*
 import androidx.browser.customtabs.CustomTabsIntent
 import com.google.android.material.floatingactionbutton.FloatingActionButton
 import androidx.fragment.app.Fragment
 import androidx.core.content.ContextCompat
 import androidx.core.widget.NestedScrollView
-import android.webkit.WebSettings
 import androidx.appcompat.app.AlertDialog
 import androidx.core.content.res.ResourcesCompat
 import androidx.room.Room
@@ -36,15 +37,15 @@ import apps.amine.bou.readerforselfoss.utils.Config
 import apps.amine.bou.readerforselfoss.utils.buildCustomTabsIntent
 import apps.amine.bou.readerforselfoss.utils.customtabs.CustomTabActivityHelper
 import apps.amine.bou.readerforselfoss.utils.glide.loadMaybeBasicAuth
+import apps.amine.bou.readerforselfoss.utils.glide.getBitmapInputStream
 import apps.amine.bou.readerforselfoss.utils.isEmptyOrNullOrNullString
 import apps.amine.bou.readerforselfoss.utils.network.isNetworkAccessible
 import apps.amine.bou.readerforselfoss.utils.openItemUrl
 import apps.amine.bou.readerforselfoss.utils.shareLink
 import apps.amine.bou.readerforselfoss.utils.sourceAndDateText
 import apps.amine.bou.readerforselfoss.utils.succeeded
-import android.webkit.WebView
-import android.webkit.WebViewClient
 import com.bumptech.glide.Glide
+import com.bumptech.glide.load.engine.DiskCacheStrategy
 import com.bumptech.glide.request.RequestOptions
 import com.github.rubensousa.floatingtoolbar.FloatingToolbar
 import kotlinx.android.synthetic.main.fragment_article.view.*
@@ -53,6 +54,7 @@ import retrofit2.Callback
 import retrofit2.Response
 import java.net.MalformedURLException
 import java.net.URL
+import java.util.concurrent.ExecutionException
 import kotlin.collections.ArrayList
 import kotlin.concurrent.thread
 
@@ -420,6 +422,30 @@ class ArticleFragment : Fragment() {
                 }
                 return true
             }
+
+            override fun shouldInterceptRequest(view: WebView?, url: String): WebResourceResponse? {
+                val glideOptions = RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.ALL)
+                if (url.toLowerCase().contains(".jpg") || url.toLowerCase().contains(".jpeg")) {
+                    try {
+                        val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
+                        return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.JPEG))
+                    }catch ( e : ExecutionException) {}
+                }
+                else if (url.toLowerCase().contains(".png")) {
+                    try {
+                        val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
+                        return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.PNG))
+                    }catch ( e : ExecutionException) {}
+                }
+                else if (url.toLowerCase().contains(".webp")) {
+                    try {
+                        val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
+                        return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.WEBP))
+                    }catch ( e : ExecutionException) {}
+                }
+
+                return super.shouldInterceptRequest(view, url)
+            }
         }
 
         val gestureDetector = GestureDetector(activity, object : GestureDetector.SimpleOnGestureListener() {

app/src/main/java/apps/amine/bou/readerforselfoss/fragments/ImageFragment.kt

@@ -1,11 +1,20 @@
 package apps.amine.bou.readerforselfoss.fragments
 
+import android.graphics.Bitmap
 import android.os.Bundle
 import android.view.*
+import android.webkit.WebResourceResponse
+import android.webkit.WebView
+import android.webkit.WebViewClient
 import androidx.appcompat.app.AppCompatActivity
 import androidx.fragment.app.Fragment
 import apps.amine.bou.readerforselfoss.R
+import apps.amine.bou.readerforselfoss.utils.glide.getBitmapInputStream
+import com.bumptech.glide.Glide
+import com.bumptech.glide.load.engine.DiskCacheStrategy
+import com.bumptech.glide.request.RequestOptions
 import kotlinx.android.synthetic.main.fragment_article.view.webcontent
+import java.util.concurrent.ExecutionException
 import kotlin.math.abs
 
 class ImageFragment : Fragment() {
@@ -33,6 +42,32 @@ class ImageFragment : Fragment() {
         view.webcontent.settings.setBuiltInZoomControls(true)
         view.webcontent.settings.setDisplayZoomControls(false)
 
+        view.webcontent.webViewClient = object : WebViewClient() {
+            override fun shouldInterceptRequest(view: WebView?, url: String): WebResourceResponse? {
+                val glideOptions = RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.ALL)
+                if (url.toLowerCase().contains(".jpg") || url.toLowerCase().contains(".jpeg")) {
+                    try {
+                        val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
+                        return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.JPEG))
+                    }catch ( e : ExecutionException) {}
+                }
+                else if (url.toLowerCase().contains(".png")) {
+                    try {
+                        val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
+                        return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.PNG))
+                    }catch ( e : ExecutionException) {}
+                }
+                else if (url.toLowerCase().contains(".webp")) {
+                    try {
+                        val image = Glide.with(view).asBitmap().apply(glideOptions).load(url).submit().get()
+                        return WebResourceResponse("image/jpg", "UTF-8", getBitmapInputStream(image, Bitmap.CompressFormat.WEBP))
+                    }catch ( e : ExecutionException) {}
+                }
+
+                return super.shouldInterceptRequest(view, url)
+            }
+        }
+
         val gestureDetector = GestureDetector(activity, object : GestureDetector.SimpleOnGestureListener() {
             override fun onFling(e1: MotionEvent?, e2: MotionEvent?, velocityX: Float, velocityY: Float): Boolean {
                 val SWIPE_MIN_DISTANCE = 120

app/src/main/java/apps/amine/bou/readerforselfoss/utils/glide/GlideUtils.kt

@@ -14,6 +14,9 @@ import com.bumptech.glide.load.model.GlideUrl
 import com.bumptech.glide.load.model.LazyHeaders
 import com.bumptech.glide.request.RequestOptions
 import com.bumptech.glide.request.target.BitmapImageViewTarget
+import java.io.ByteArrayInputStream
+import java.io.ByteArrayOutputStream
+import java.io.InputStream
 
 fun Context.bitmapCenterCrop(config: Config, url: String, iv: ImageView) =
     Glide.with(this)
@@ -57,3 +60,10 @@ fun RequestManager.loadMaybeBasicAuth(config: Config, url: String): RequestBuild
     val glideUrl = GlideUrl(url, builder.build())
     return this.load(glideUrl)
 }
+
+fun getBitmapInputStream(bitmap:Bitmap,compressFormat: Bitmap.CompressFormat): InputStream {
+    val byteArrayOutputStream = ByteArrayOutputStream()
+    bitmap.compress(compressFormat, 80, byteArrayOutputStream)
+    val bitmapData: ByteArray = byteArrayOutputStream.toByteArray()
+    return ByteArrayInputStream(bitmapData)
+}