ignore 404 on search (#15100)

src/en/nana/build.gradle

@@ -5,7 +5,7 @@ ext {
     extName = 'Nana'
     pkgNameSuffix = 'en.nana'
     extClass = '.Nana'
-    extVersionCode = 1
+    extVersionCode = 2
     isNsfw = true
 }
 

src/en/nana/src/eu/kanade/tachiyomi/extension/en/nana/Nana.kt

@@ -1,15 +1,19 @@
 package eu.kanade.tachiyomi.extension.en.nana
 
 import eu.kanade.tachiyomi.network.GET
+import eu.kanade.tachiyomi.network.asObservable
 import eu.kanade.tachiyomi.network.interceptor.rateLimit
 import eu.kanade.tachiyomi.source.model.Filter
 import eu.kanade.tachiyomi.source.model.FilterList
+import eu.kanade.tachiyomi.source.model.MangasPage
 import eu.kanade.tachiyomi.source.model.Page
 import eu.kanade.tachiyomi.source.model.SChapter
 import eu.kanade.tachiyomi.source.model.SManga
 import eu.kanade.tachiyomi.source.online.ParsedHttpSource
+import okhttp3.Call
 import okhttp3.HttpUrl.Companion.toHttpUrl
 import okhttp3.Request
+import okhttp3.Response
 import org.jsoup.nodes.Document
 import org.jsoup.nodes.Element
 import rx.Observable
@@ -41,6 +45,13 @@ class Nana : ParsedHttpSource() {
         searchMangaNextPageSelector()
 
     // Search
+    // The search returns 404 when there's no results.
+    override fun fetchSearchManga(page: Int, query: String, filters: FilterList): Observable<MangasPage> {
+        return client.newCall(searchMangaRequest(page, query, filters))
+            .asObservableIgnoreCode(404)
+            .map(::searchMangaParse)
+    }
+
     override fun searchMangaRequest(page: Int, query: String, filters: FilterList): Request {
         val filterList = if (filters.isEmpty()) getFilterList() else filters
         val tagsFilter = filterList.find { it is TagsFilter } as TagsFilter
@@ -179,6 +190,15 @@ class Nana : ParsedHttpSource() {
     }
 
     // Other
+    private fun Call.asObservableIgnoreCode(code: Int): Observable<Response> {
+        return asObservable().doOnNext { response ->
+            if (!response.isSuccessful && response.code != code) {
+                response.close()
+                throw Exception("HTTP error ${response.code}")
+            }
+        }
+    }
+
     companion object {
         private val PATTERN_PAGES = Regex("Reader\\.pages\\s*=\\s*\\{\\\"pages\\\":\\[([^];\\n]+)]\\}\\.pages;")
     }