From 7b37c98e88309f67b467fea5fcf71e4736984a0d Mon Sep 17 00:00:00 2001
From: advplyr <advplyr@protonmail.com>
Date: Sun, 21 Dec 2025 15:38:34 -0600
Subject: [PATCH] Book tags genres dedupe (#4927)

* Update Audible provider dedupe genres/tags and return tags as array

* Update custom metadata provider to dedupe tags/genres and return tags as array
---
 server/providers/Audible.js               | 13 ++++++++----
 server/providers/CustomProviderAdapter.js | 25 +++++++++++++++++++++--
 2 files changed, 32 insertions(+), 6 deletions(-)

diff --git a/server/providers/Audible.js b/server/providers/Audible.js
index 2c12ffc1..6ba01aa8 100644
--- a/server/providers/Audible.js
+++ b/server/providers/Audible.js
@@ -57,8 +57,13 @@ class Audible {
       })
     }
 
-    const genresFiltered = genres ? genres.filter((g) => g.type == 'genre').map((g) => g.name) : []
-    const tagsFiltered = genres ? genres.filter((g) => g.type == 'tag').map((g) => g.name) : []
+    let genresCleaned = null
+    let tagsCleaned = null
+
+    if (genres && Array.isArray(genres)) {
+      genresCleaned = [...new Set(genres.filter((g) => g.type == 'genre').map((g) => g.name))]
+      tagsCleaned = [...new Set(genres.filter((g) => g.type == 'tag').map((g) => g.name))]
+    }
 
     return {
       title,
@@ -71,8 +76,8 @@ class Audible {
       cover: image,
       asin,
       isbn,
-      genres: genresFiltered.length ? genresFiltered : null,
-      tags: tagsFiltered.length ? tagsFiltered.join(', ') : null,
+      genres: genresCleaned.length ? genresCleaned : null,
+      tags: tagsCleaned.length ? tagsCleaned : null,
       series: series.length ? series : null,
       language: language ? language.charAt(0).toUpperCase() + language.slice(1) : null,
       duration: runtimeLengthMin && !isNaN(runtimeLengthMin) ? Number(runtimeLengthMin) : 0,
diff --git a/server/providers/CustomProviderAdapter.js b/server/providers/CustomProviderAdapter.js
index c079a128..5c8cad75 100644
--- a/server/providers/CustomProviderAdapter.js
+++ b/server/providers/CustomProviderAdapter.js
@@ -89,6 +89,27 @@ class CustomProviderAdapter {
         })
         .filter((s) => s !== undefined)
     }
+    /**
+     * Validates and dedupes tags/genres array
+     * Can be comma separated string or array of strings
+     * @param {string|string[]} tagsGenres
+     * @returns {string[]}
+     */
+    const validateTagsGenresArray = (tagsGenres) => {
+      if (!tagsGenres || (typeof tagsGenres !== 'string' && !Array.isArray(tagsGenres))) return undefined
+
+      // If string, split by comma and trim each item
+      if (typeof tagsGenres === 'string') tagsGenres = tagsGenres.split(',')
+      // If array, ensure all items are strings
+      else if (!tagsGenres.every((t) => typeof t === 'string')) return undefined
+
+      // Trim and filter out empty strings
+      tagsGenres = tagsGenres.map((t) => t.trim()).filter(Boolean)
+      if (!tagsGenres.length) return undefined
+
+      // Dedup
+      return [...new Set(tagsGenres)]
+    }
 
     // re-map keys to throw out
     return matches.map((match) => {
@@ -105,8 +126,8 @@ class CustomProviderAdapter {
         cover: toStringOrUndefined(cover),
         isbn: toStringOrUndefined(isbn),
         asin: toStringOrUndefined(asin),
-        genres: Array.isArray(genres) && genres.every((g) => typeof g === 'string') ? genres : undefined,
-        tags: toStringOrUndefined(tags),
+        genres: validateTagsGenresArray(genres),
+        tags: validateTagsGenresArray(tags),
         series: validateSeriesArray(series),
         language: toStringOrUndefined(language),
         duration: !isNaN(duration) && duration !== null ? Number(duration) : undefined