Fix archive download

app/src/main/kotlin/com/hippo/ehviewer/client/EhEngine.kt

@@ -306,7 +306,7 @@ object EhEngine {
     suspend fun getFavoriteNote(gid: Long, token: String) = ehRequest(EhUrl.getAddFavorites(gid, token), EhUrl.getGalleryDetailUrl(gid, token))
         .fetchUsingAsText(FavoritesParser::parseNote)
 
-    suspend fun downloadArchive(gid: Long, token: String, or: String, res: String, isHAtH: Boolean): String? {
+    suspend fun downloadArchive(gid: Long, token: String, or: String?, res: String, isHAtH: Boolean): String? {
         val url = EhUrl.getDownloadArchive(gid, token, or)
         val referer = EhUrl.getGalleryDetailUrl(gid, token)
         val request = ehRequest(url, referer, EhUrl.origin) {

app/src/main/kotlin/com/hippo/ehviewer/client/EhUrl.kt

@@ -125,10 +125,10 @@ object EhUrl {
         addQueryParameter("act", "addfav")
     }.buildString()
 
-    fun getDownloadArchive(gid: Long, token: String, or: String) = ehUrl("archiver.php") {
+    fun getDownloadArchive(gid: Long, token: String, or: String?) = ehUrl("archiver.php") {
         addQueryParameter("gid", "$gid")
         addQueryParameter("token", token)
-        addQueryParameter("or", or)
+        addQueryParameterIfNotBlank("or", or)
     }.buildString()
 
     fun getTagDefinitionUrl(tag: String) = "https://ehwiki.org/wiki/" + tag.replace(' ', '_')

app/src/main/kotlin/com/hippo/ehviewer/client/parser/ArchiveParser.kt

@@ -35,8 +35,7 @@ object ArchiveParser {
         "You do not have enough funds to download this archive."
 
     fun parse(body: String, maybeFunds: Funds?): Result {
-        val m = PATTERN_HATH_FORM.find(body)!!
-        val paramOr = m.groupValues[1]
+        val paramOr = PATTERN_HATH_FORM.find(body)?.groupValues[1]
         val archiveList = ArrayList<Archive>()
         Jsoup.parse(body).select("#db>div>div").forEach { element ->
             if (element.childrenSize() > 0 && !element.attr("style").contains("color:#CCCCCC")) {
@@ -78,7 +77,7 @@ object ArchiveParser {
         // TODO: Check more errors
     }
 
-    data class Result(val paramOr: String, val archiveList: List<Archive>, val funds: Funds)
+    data class Result(val paramOr: String?, val archiveList: List<Archive>, val funds: Funds)
 }
 
 class Archive(