Add EH code.

app/src/main/java/exh/metadata/models/ExGalleryMetadata.kt

@@ -0,0 +1,52 @@
+package exh.metadata.models
+
+import android.net.Uri
+import java.util.*
+
+/**
+ * Gallery metadata storage model
+ */
+
+class ExGalleryMetadata {
+    var url: String? = null
+
+    var exh: Boolean? = null
+
+    var title: String? = null
+    var altTitle: String? = null
+
+    var thumbnailUrl: String? = null
+
+    var genre: String? = null
+
+    var uploader: String? = null
+    var datePosted: Long? = null
+    var parent: String? = null
+    var visible: String? = null
+    var language: String? = null
+    var translated: Boolean? = null
+    var size: Long? = null
+    var length: Int? = null
+    var favorites: Int? = null
+    var ratingCount: Int? = null
+    var averageRating: Double? = null
+
+    //Being specific about which classes are used in generics to make deserialization easier
+    var tags: HashMap<String, ArrayList<Tag>> = HashMap()
+
+    private fun splitGalleryUrl()
+            = url?.let {
+        Uri.parse(it).pathSegments.filterNot(String::isNullOrBlank)
+    }
+
+    fun galleryId() = splitGalleryUrl()?.let { it[it.size - 2] }
+
+    fun galleryToken() =
+        splitGalleryUrl()?.last()
+
+    fun galleryUniqueIdentifier() = exh?.let { exh ->
+        url?.let {
+            "${if(exh) "EXH" else "EX"}-${galleryId()}-${galleryToken()}"
+        }
+    }
+}