feat(api): get all publishers

komga/src/main/kotlin/org/gotson/komga/domain/persistence/ReferentialRepository.kt

@@ -5,4 +5,5 @@ interface ReferentialRepository {
   fun findAllGenres(): Set<String>
   fun findAllTags(): Set<String>
   fun findAllLanguages(): Set<String>
+  fun findAllPublishers(): Set<String>
 }

komga/src/main/kotlin/org/gotson/komga/infrastructure/jooq/ReferentialDao.kt

@@ -46,4 +46,11 @@ class ReferentialDao(
       .from(sd)
       .orderBy(sd.LANGUAGE)
       .fetchSet(sd.LANGUAGE)
+
+  override fun findAllPublishers(): Set<String> =
+    dsl.selectDistinct(sd.PUBLISHER)
+      .from(sd)
+      .where(sd.PUBLISHER.ne(""))
+      .orderBy(sd.PUBLISHER)
+      .fetchSet(sd.PUBLISHER)
 }

komga/src/main/kotlin/org/gotson/komga/interfaces/rest/ReferentialController.kt

@@ -31,4 +31,8 @@ class ReferentialController(
   @GetMapping("/languages")
   fun getLanguages(): Set<String> =
     referentialRepository.findAllLanguages()
+
+  @GetMapping("/publishers")
+  fun getPublishers(): Set<String> =
+    referentialRepository.findAllPublishers()
 }