Update the EH search engine to fix issues with the current search features

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryAdapter.kt

@@ -58,11 +58,11 @@ class LibraryCategoryAdapter(view: LibraryCategoryView) :
      *
      * @param list the list to set.
      */
-    suspend fun setItems(cScope: CoroutineScope, list: List<LibraryItem>) {
+    suspend fun setItems(scope: CoroutineScope, list: List<LibraryItem>) {
         // A copy of manga always unfiltered.
         mangas = list.toList()
 
-        performFilter(cScope)
+        performFilter(scope)
     }
 
     /**
@@ -78,12 +78,12 @@ class LibraryCategoryAdapter(view: LibraryCategoryView) :
     // Note that we cannot use FlexibleAdapter's built in filtering system as we cannot cancel it
     //   (well technically we can cancel it by invoking filterItems again but that doesn't work when
     //    we want to perform a no-op filter)
-    suspend fun performFilter(cScope: CoroutineScope) {
+    suspend fun performFilter(scope: CoroutineScope) {
         lastFilterJob?.cancel()
         if (mangas.isNotEmpty() && searchText.isNotBlank()) {
             val savedSearchText = searchText
 
-            val job = cScope.launch(Dispatchers.IO) {
+            val job = scope.launch(Dispatchers.IO) {
                 val newManga = try {
                     // Prepare filter object
                     val parsedQuery = searchEngine.parseQuery(savedSearchText)
@@ -134,11 +134,11 @@ class LibraryCategoryAdapter(view: LibraryCategoryView) :
                                 // Check if this manga even has metadata
                                 if (mangaWithMetaIds.binarySearch(mangaId) < 0) {
                                     // No meta? Filter using title
-                                    item.filter(savedSearchText)
+                                    item.filter(savedSearchText to true)
-                                } else false
+                                } else item.filter(savedSearchText to false)
                             } else true
                         } else {
-                            item.filter(savedSearchText)
+                            item.filter(savedSearchText to true)
                         }
                     }.toList()
                 } catch (e: Exception) {

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryView.kt

@@ -86,7 +86,7 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
 
     // EXH -->
     private var initialLoadHandle: LoadingHandle? = null
-    lateinit var scope2: CoroutineScope
+    private lateinit var supervisorScope: CoroutineScope
 
     private fun newScope() = object : CoroutineScope {
         override val coroutineContext = SupervisorJob() + Dispatchers.Main
@@ -150,7 +150,7 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
         // SY <--
 
         // EXH -->
-        scope2 = newScope()
+        supervisorScope = newScope()
         initialLoadHandle = controller.loaderManager.openProgressBar()
         // EXH <--
 
@@ -161,7 +161,7 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
             .observeOn(AndroidSchedulers.mainThread())
             .subscribe {
                 // EXH -->
-                scope2.launch {
+                supervisorScope.launch {
                     val handle = controller.loaderManager.openProgressBar()
                     try {
                         // EXH <--
@@ -177,7 +177,7 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
         subscriptions += controller.libraryMangaRelay
             .subscribe {
                 // EXH -->
-                scope2.launch {
+                supervisorScope.launch {
                     try {
                         // EXH <--
                         onNextLibraryManga(this, it)
@@ -249,7 +249,7 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
     fun unsubscribe() {
         subscriptions.clear()
         // EXH -->
-        scope2.cancel()
+        supervisorScope.cancel()
         controller.loaderManager.closeProgressBar(initialLoadHandle)
         // EXH <--
     }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryItem.kt

@@ -19,18 +19,26 @@ import eu.kanade.tachiyomi.data.preference.PreferenceValues.DisplayMode
 import eu.kanade.tachiyomi.data.track.TrackManager
 import eu.kanade.tachiyomi.source.SourceManager
 import eu.kanade.tachiyomi.widget.AutofitRecyclerView
+import exh.isNamespaceSource
+import exh.metadata.metadata.base.RaisedTag
+import exh.util.SourceTagsUtil.Companion.TAG_TYPE_EXCLUDE
+import exh.util.SourceTagsUtil.Companion.getRaisedTags
+import exh.util.SourceTagsUtil.Companion.parseTag
 import kotlinx.android.synthetic.main.source_compact_grid_item.view.card
 import kotlinx.android.synthetic.main.source_compact_grid_item.view.gradient
 import uy.kohesive.injekt.Injekt
 import uy.kohesive.injekt.api.get
 
 class LibraryItem(val manga: LibraryManga, private val libraryDisplayMode: Preference<DisplayMode>) :
-    AbstractFlexibleItem<LibraryHolder>(), IFilterable<String> {
+    AbstractFlexibleItem<LibraryHolder>(), IFilterable<Pair<String, Boolean>> {
 
     private val sourceManager: SourceManager = Injekt.get()
     // SY -->
     private val trackManager: TrackManager = Injekt.get()
     private val db: DatabaseHelper = Injekt.get()
+    private val source by lazy {
+        sourceManager.get(manga.source)
+    }
     // SY <--
 
     var downloadCount = -1
@@ -96,38 +104,13 @@ class LibraryItem(val manga: LibraryManga, private val libraryDisplayMode: Prefe
      * @param constraint the query to apply.
      * @return true if the manga should be included, false otherwise.
      */
-    override fun filter(constraint: String): Boolean {
+    override fun filter(constraint: Pair<String, Boolean>): Boolean {
-        return manga.title.contains(constraint, true) ||
+        return manga.title.contains(constraint.first, true) ||
-            (manga.author?.contains(constraint, true) ?: false) ||
+            (manga.author?.contains(constraint.first, true) ?: false) ||
-            (manga.artist?.contains(constraint, true) ?: false) ||
+            (manga.artist?.contains(constraint.first, true) ?: false) ||
-            sourceManager.getOrStub(manga.source).name.contains(constraint, true) ||
+            (source?.name?.contains(constraint.first, true) ?: false) ||
-            (Injekt.get<TrackManager>().hasLoggedServices() && filterTracks(constraint, db.getTracks(manga).executeAsBlocking())) ||
+            (Injekt.get<TrackManager>().hasLoggedServices() && filterTracks(constraint.first, db.getTracks(manga).executeAsBlocking())) ||
-            if (constraint.contains(" ") || constraint.contains("\"")) {
+            constraint.second && ehContainsGenre(constraint.first)
-                val genres = manga.genre?.split(", ")?.map {
-                    it.drop(it.indexOfFirst { it == ':' } + 1).toLowerCase().trim() // tachiEH tag namespaces
-                }
-                var clean_constraint = ""
-                var ignorespace = false
-                for (i in constraint.trim().toLowerCase()) {
-                    if (i == ' ') {
-                        if (!ignorespace) {
-                            clean_constraint = clean_constraint + ","
-                        } else {
-                            clean_constraint = clean_constraint + " "
-                        }
-                    } else if (i == '"') {
-                        ignorespace = !ignorespace
-                    } else {
-                        clean_constraint = clean_constraint + Character.toString(i)
-                    }
-                }
-                clean_constraint.split(",").all { containsGenre(it.trim(), genres) }
-            } else containsGenre(
-                constraint,
-                manga.genre?.split(", ")?.map {
-                    it.drop(it.indexOfFirst { it == ':' } + 1).toLowerCase().trim() // tachiEH tag namespaces
-                }
-            )
     }
 
     private fun filterTracks(constraint: String, tracks: List<Track>): Boolean {
@@ -141,6 +124,54 @@ class LibraryItem(val manga: LibraryManga, private val libraryDisplayMode: Prefe
             return@any false
         }
     }
+
+    private fun ehContainsGenre(constraint: String): Boolean {
+        val genres = manga.getGenres()
+        val raisedTags = if (source?.isNamespaceSource() == true) {
+            manga.getRaisedTags(genres)
+        } else null
+        return if (constraint.contains(" ") || constraint.contains("\"")) {
+            var cleanConstraint = ""
+            var ignoreSpace = false
+            for (i in constraint.trim().toLowerCase()) {
+                when (i) {
+                    ' ' -> {
+                        cleanConstraint = if (!ignoreSpace) {
+                            "$cleanConstraint,"
+                        } else {
+                            "$cleanConstraint "
+                        }
+                    }
+                    '"' -> {
+                        ignoreSpace = !ignoreSpace
+                    }
+                    else -> {
+                        cleanConstraint += i.toString()
+                    }
+                }
+            }
+            cleanConstraint.split(",").all {
+                if (raisedTags == null) containsGenre(it.trim(), genres) else containsRaisedGenre(
+                    parseTag(it.trim()), raisedTags
+                )
+            }
+        } else if (raisedTags == null) {
+            containsGenre(constraint, genres)
+        } else {
+            containsRaisedGenre(parseTag(constraint), raisedTags)
+        }
+    }
+
+    private fun containsRaisedGenre(tag: RaisedTag, genres: List<RaisedTag>): Boolean {
+        val genre = genres.find {
+            (it.namespace?.toLowerCase() == tag.namespace?.toLowerCase() && it.name.toLowerCase() == tag.name.toLowerCase())
+        }
+        return if (tag.type == TAG_TYPE_EXCLUDE) {
+            genre == null
+        } else {
+            genre != null
+        }
+    }
     // SY <--
 
     private fun containsGenre(tag: String, genres: List<String>?): Boolean {

app/src/main/java/exh/search/SearchEngine.kt

@@ -7,7 +7,7 @@ import exh.metadata.sql.tables.SearchTitleTable
 class SearchEngine {
     private val queryCache = mutableMapOf<String, List<QueryComponent>>()
 
-    fun textToSubQueries(
+    private fun textToSubQueries(
         namespace: String?,
         component: Text?
     ): Pair<String, List<String>>? {
@@ -20,12 +20,13 @@ class SearchEngine {
         }
         val componentTagQuery = maybeLenientComponent?.let {
             val params = mutableListOf<String>()
-            it.map { q ->
+            it.joinToString(separator = " OR ", prefix = "(", postfix = ")") { q ->
                 params += q
                 "${SearchTagTable.TABLE}.${SearchTagTable.COL_NAME} LIKE ?"
-            }.joinToString(separator = " OR ", prefix = "(", postfix = ")") to params
+            } to params
         }
-        return if (namespace != null) {
+        return when {
+            namespace != null -> {
                 var query =
                     """
                     (SELECT ${SearchTagTable.COL_MANGA_ID} AS $COL_MANGA_ID FROM ${SearchTagTable.TABLE}
@@ -39,7 +40,8 @@ class SearchEngine {
                 }
 
                 "$query)" to params
-        } else if (component != null) {
+            }
+            component != null -> {
                 // Match title + tags
                 val tagQuery =
                     """
@@ -55,7 +57,9 @@ class SearchEngine {
 
                 "(${tagQuery.first} UNION ${titleQuery.first})".trimIndent() to
                     (tagQuery.second + titleQuery.second)
-        } else null
+            }
+            else -> null
+        }
     }
 
     fun queryToSql(q: List<QueryComponent>): Pair<String, List<String>> {
@@ -158,7 +162,7 @@ class SearchEngine {
             }
         }
 
-        for (char in query.toLowerCase()) {
+        query.toLowerCase().forEach { char ->
             if (char == '"') {
                 inQuotes = !inQuotes
             } else if (enableWildcard && (char == '?' || char == '_')) {
@@ -167,7 +171,7 @@ class SearchEngine {
             } else if (enableWildcard && (char == '*' || char == '%')) {
                 flushText()
                 queuedText.add(MultiWildcard(char.toString()))
-            } else if (char == '-') {
+            } else if (char == '-' && !inQuotes && (queuedRawText.isBlank() || queuedRawText.last() == ' ')) {
                 nextIsExcluded = true
             } else if (char == '$') {
                 nextIsExact = true

app/src/main/java/exh/util/SourceTagsUtil.kt

@@ -48,9 +48,21 @@ class SourceTagsUtil {
         "$namespace:$tag"
     }
     companion object {
-        fun Manga.getRaisedTags(): List<RaisedTag>? = this.getGenres()?.map { parseTag(it) }
+        fun Manga.getRaisedTags(genres: List<String>? = null): List<RaisedTag>? = (genres ?: this.getGenres())?.map { parseTag(it) }
 
-        fun parseTag(tag: String) = RaisedTag(tag.substringBefore(':').trimOrNull(), (tag.substringAfter(':').trimOrNull() ?: tag), TAG_TYPE_DEFAULT)
+        fun parseTag(tag: String) = RaisedTag(
+            (
+                if (tag.startsWith("-")) {
+                    tag.substringAfter("-")
+                } else {
+                    tag
+                }
+                ).substringBefore(':', missingDelimiterValue = "").trimOrNull(),
+            tag.substringAfter(':', missingDelimiterValue = tag).trim(),
+            if (tag.startsWith("-")) TAG_TYPE_EXCLUDE else TAG_TYPE_DEFAULT
+        )
+
+        const val TAG_TYPE_EXCLUDE = 69 // why not
 
         const val DOUJINSHI_COLOR = "#f44336"
         const val MANGA_COLOR = "#ff9800"