fix set first audio in lang default

Tdarr_Plugin_gabehf_Make_First_Audio_In_Lang_Default.js

@@ -6,7 +6,7 @@ const details = () => ({
     Type: 'Audio',
     Operation: 'Transcode',
     Description:
-      'If no audio in the preferred language are made default already, this plugin sets the first audio stream in that language as default. \\n',
+      'Sets the first audio stream in preferred language as default, removing all other defaults if processed. \\n',
     Version: '1.0',
     Tags: 'pre-processing,ffmpeg,audio only,configurable',
     Inputs: [{
@@ -55,23 +55,26 @@ const details = () => ({
     // Set up required variables.
     let ffmpegCommandInsert = '';
     let audioIdx = 0;
+    let firstAudioInLangIdx = -1;
     let convert = false;
+    let foundAudioInLang = false;
     let defaults = [] // list of tracks currently set as default
+
+    // 1, 2 jpn (default), 3 eng (default)
+    // [0,1,1]
+    // firstAudioIdx = 2
+    // convert = false
     
     for (let i = 0; i < file.ffProbeData.streams.length; i++) {
       try {
         if (file.ffProbeData.streams[i].codec_type.toLowerCase() === 'audio') {
-            defaults[audioIdx] = file.ffProbeData.streams[i].disposition.default === 1
-            if (!convert && file.ffProbeData.streams[i].disposition.default === 0 && languages.includes(file.ffProbeData.streams[i].tags.language)) {
-                convert = true;
-                ffmpegCommandInsert += `-disposition:a:${audioIdx} default `;
-                response.infoLog += `☒Audio stream 0:a:${audioIdx} is the first track in preferred language and not currently default; setting as default. \n`;
-            } else if (file.ffProbeData.streams[i].disposition.default === 1 && languages.includes(file.ffProbeData.streams[i].tags.language)) {
-                // if any audio with the preferred language is marked default, no action is needed.
-                convert = false;
-                response.infoLog = '';
-                break;
-            }
+          defaults[audioIdx] = file.ffProbeData.streams[i].disposition.default === 1
+          // if we find an audio in the lang
+          if (languages.includes(file.ffProbeData.streams[i].tags.language)) {
+            // mark the id and break
+            firstAudioInLangIdx = audioIdx;
+            break;
+          }
           audioIdx += 1;
         }
         } catch (err) {
@@ -79,15 +82,23 @@ const details = () => ({
         }
     }
 
-    if (convert) {
-        // remove previous default(s)
-        for (let i = 0; i < defaults.length; i++) {
-            if (defaults[i]) {
-                ffmpegCommandInsert += `-disposition:a:${i} 0 `;
-                response.infoLog += `☒Audio stream 0:a:${i} was default but not in preferred language; removing disposition. \n`;
-            }
-        }
-    } 
+    // remove overlapping default(s)
+    for (let i = 0; i < defaults.length; i++) {
+      if (firstAudioInLangIdx === -1) {
+        // we never found an audio track in lang, just break
+        break;
+      } else if (firstAudioInLangIdx === i && defaults[i] === 0) {
+        convert = true;
+        ffmpegCommandInsert += `-disposition:a:${i} default `;
+        response.infoLog += `☒Audio stream 0:a:${i} is the first track in preferred language and not currently default; setting as default. \n`;
+      } else if (firstAudioInLangIdx === i && defaults[i] === 1) {
+        response.infoLog += `☒Audio stream 0:a:${i} is the first track in preferred language and alrady default. \n`;
+      } else if (defaults[i] === 1) {
+        convert = true;
+        ffmpegCommandInsert += `-disposition:a:${i} 0 `;
+        response.infoLog += `☒Audio stream 0:a:${i} is overlapping with new default audio track; removing disposition. \n`;
+      }
+    }
   
     // Convert file if convert variable is set to true.
     if (convert === true) {