Recode pageListParse (#2205)

Find and replace placeholder images

src/en/mangahasu/build.gradle

@@ -5,8 +5,13 @@ ext {
     appName = 'Tachiyomi: Mangahasu'
     pkgNameSuffix = 'en.mangahasu'
     extClass = '.Mangahasu'
-    extVersionCode = 5
+    extVersionCode = 6
     libVersion = '1.2'
 }
 
+dependencies {
+    compileOnly 'com.google.code.gson:gson:2.8.5'
+    compileOnly 'com.github.salomonbrys.kotson:kotson:2.5.0'
+}
+
 apply from: "$rootDir/common.gradle"

src/en/mangahasu/src/eu/kanade/tachiyomi/extension/en/mangahasu/Mangahasu.kt

@@ -1,5 +1,8 @@
 package eu.kanade.tachiyomi.extension.en.mangahasu
 
+import android.util.Base64
+import com.github.salomonbrys.kotson.*
+import com.google.gson.JsonParser
 import eu.kanade.tachiyomi.network.GET
 import eu.kanade.tachiyomi.source.model.FilterList
 import eu.kanade.tachiyomi.source.model.Page
@@ -112,12 +115,31 @@ class Mangahasu: ParsedHttpSource() {
     }
 
     override fun pageListParse(document: Document): List<Page> {
-        val pages = mutableListOf<Page>()
-        var i = 0
-        document.select("div.img img").forEach { element ->
-            i++
-            pages.add(Page(i, "", element.attr("src")))
+
+        //Grab All Pages from site
+        //Some images are place holders on new chapters.
+		
+        val pages = mutableListOf<Page>().apply {
+            document.select("div.img img").forEach {
+                val pageNumber = it.attr("class").substringAfter("page").toInt()
+                add(Page(pageNumber,"",it.attr("src")))
+            }
         }
+
+        //Some images are not yet loaded onto Mangahasu's image server.
+        //Decode temporary URLs and replace placeholder images.
+		
+        val lstDUrls = document.select("script:containsData(lstDUrls)").html().substringAfter("lstDUrls").substringAfter("\"").substringBefore("\"")
+        if (lstDUrls != "W10="){ //Base64 = [] or empty file
+            val decoded = String(Base64.decode(lstDUrls,Base64.DEFAULT))
+            val json = JsonParser().parse(decoded).array
+            json.forEach {
+                val pageNumber = it["page"].int
+                pages.removeAll { page ->  page.index == pageNumber  }
+                pages.add(Page(pageNumber,"",it["url"].string))
+            }
+        }
+        pages.sortBy { page -> page.index }
         return pages
     }