Artist filter support

src/main/kotlin/org/koitharu/kotatsu/parsers/model/MangaListFilter.kt

@@ -15,6 +15,7 @@ public data class MangaListFilter(
 	@JvmField val year: Int = YEAR_UNKNOWN,
 	@JvmField val yearFrom: Int = YEAR_UNKNOWN,
 	@JvmField val yearTo: Int = YEAR_UNKNOWN,
+	@JvmField val author: String? = null,
 ) {
 
 	private fun isNonSearchOptionsEmpty(): Boolean = tags.isEmpty() &&
@@ -27,7 +28,8 @@ public data class MangaListFilter(
 		yearFrom == YEAR_UNKNOWN &&
 		yearTo == YEAR_UNKNOWN &&
 		types.isEmpty() &&
-		demographics.isEmpty()
+		demographics.isEmpty() &&
+		author.isNullOrEmpty()
 
 	public fun isEmpty(): Boolean = isNonSearchOptionsEmpty() && query.isNullOrEmpty()
 

src/main/kotlin/org/koitharu/kotatsu/parsers/model/MangaListFilterCapabilities.kt

@@ -47,4 +47,10 @@ public data class MangaListFilterCapabilities @InternalParsersApi constructor(
 	 * @see [MangaListFilterOptions.availableLocales]
 	 */
 	val isOriginalLocaleSupported: Boolean = false,
+
+	/**
+	 * Whether parser supports searching by author name
+	 * @see [MangaListFilter.author]
+	 */
+	val isAuthorSearchSupported: Boolean = false,
 )

src/main/kotlin/org/koitharu/kotatsu/parsers/site/all/ExHentaiParser.kt

@@ -19,6 +19,7 @@ import org.koitharu.kotatsu.parsers.exception.AuthRequiredException
 import org.koitharu.kotatsu.parsers.exception.TooManyRequestExceptions
 import org.koitharu.kotatsu.parsers.model.*
 import org.koitharu.kotatsu.parsers.util.*
+import java.text.SimpleDateFormat
 import java.util.*
 import java.util.Collections.emptyList
 import java.util.concurrent.TimeUnit
@@ -54,6 +55,7 @@ internal class ExHentaiParser(
 			isTagsExclusionSupported = true,
 			isSearchSupported = true,
 			isSearchWithFiltersSupported = true,
+			isAuthorSearchSupported = true,
 		)
 
 	override val isAuthorized: Boolean
@@ -172,8 +174,8 @@ internal class ExHentaiParser(
 				url = href,
 				publicUrl = a.absUrl("href"),
 				rating = td2.selectFirst("div.ir")?.parseRating() ?: RATING_UNKNOWN,
-				isNsfw = true,
-				coverUrl = td1.selectFirst("img")?.absUrl("src").orEmpty(),
+				contentRating = ContentRating.ADULT,
+				coverUrl = td1.selectFirst("img")?.attrAsAbsoluteUrlOrNull("src"),
 				tags = tagsDiv.parseTags(),
 				state = null,
 				author = tagsDiv.getElementsContainingOwnText("artist:").first()
@@ -190,9 +192,18 @@ internal class ExHentaiParser(
 		val title = root.getElementById("gd2")
 		val tagList = root.getElementById("taglist")
 		val tabs = doc.body().selectFirst("table.ptt")?.selectFirst("tr")
-		val lang = root.getElementById("gd3")
+		val gd3 = root.getElementById("gd3")
+		val lang = gd3
 			?.selectFirst("tr:contains(Language)")
 			?.selectFirst(".gdt2")?.ownTextOrNull()
+		val uploadDate = gd3
+			?.selectFirst("tr:contains(Posted)")
+			?.selectFirst(".gdt2")?.ownTextOrNull()
+			.let { SimpleDateFormat("yyyy-MM-dd HH:mm", sourceLocale).tryParse(it) }
+		val uploader = gd3
+			?.getElementsByAttributeValueContaining("href", "/uploader/")
+			?.firstOrNull()
+			?.ownTextOrNull()
 		val tags = tagList?.parseTags().orEmpty()
 
 		return manga.copy(
@@ -223,9 +234,9 @@ internal class ExHentaiParser(
 						number = i.toFloat(),
 						volume = 0,
 						url = url,
-						uploadDate = 0L,
+						uploadDate = uploadDate,
 						source = source,
-						scanlator = null,
+						scanlator = uploader,
 						branch = lang,
 					)
 				}
@@ -415,6 +426,11 @@ internal class ExHentaiParser(
 			joiner.append(lc.toLanguagePath())
 			joiner.append("\"$")
 		}
+		if (!author.isNullOrEmpty()) {
+			joiner.add("artist:\"")
+			joiner.append(author)
+			joiner.append("\"$")
+		}
 		return joiner.complete().nullIfEmpty()
 	}
 

src/main/kotlin/org/koitharu/kotatsu/parsers/site/ru/grouple/GroupleParser.kt

@@ -103,12 +103,13 @@ internal abstract class GroupleParser(
 		} else {
 			advancedSearch(offset, order, filter).parseHtml()
 		}
-		val tiles =
-			root.selectFirst("div.tiles.row") ?: if (root.select(".alert").any { it.ownText() == NOTHING_FOUND }) {
+		val tiles = root.selectFirst("div.tiles.row")
+		if (tiles == null) {
+			if (!root.getElementsContainingOwnText(NOTHING_FOUND).isNullOrEmpty()) {
 				return emptyList()
-			} else {
-				root.parseFailed("No tiles found")
 			}
+			root.parseFailed("No tiles found")
+		}
 		return tiles.select("div.tile").mapNotNull(::parseManga)
 	}