Feature: Add option to keep unused patterns during export

src/lib/exporters/ableton/index.ts

@@ -41,6 +41,7 @@ async function exportAbleton(
       progressCallback,
       abortSignal,
       exporterParams.exportAllPadsWithSamples,
+      exporterParams.keepUnusedPatterns,
     );
     samples.forEach((s) => {
       zippedProject.file(`${projectName} Project/Samples/Imported/${s.name}`, s.data);

src/lib/exporters/utils.ts

@@ -219,7 +219,11 @@ export function getSampleName(name: string | undefined, soundId: number, extensi
   return extension ? `${n}.wav` : n;
 }
 
-function getSoundsInfoFromProject(data: ProjectRawData, exportAllPadsWithSamples = false) {
+function getSoundsInfoFromProject(
+  data: ProjectRawData,
+  exportAllPadsWithSamples = false,
+  keepUnusedPatterns = false,
+) {
   const snds: SoundInfo[] = [];
   const existingSounds = new Set<number>();
   const usedSoundIds = new Set<number>();
@@ -235,6 +239,23 @@ function getSoundsInfoFromProject(data: ProjectRawData, exportAllPadsWithSamples
     }
   }
 
+  if (keepUnusedPatterns) {
+    for (const pattern of data.groupPatterns) {
+      for (const [source, notes] of Object.entries(pattern.notes)) {
+        if (notes.length === 0) {
+          continue;
+        }
+
+        const pad = data.pads[pattern.group]?.find(
+          (candidate) => candidate.pad === Number(source) + 1,
+        );
+        if (pad?.soundId) {
+          usedSoundIds.add(pad.soundId);
+        }
+      }
+    }
+  }
+
   for (const group in data.pads) {
     for (const pad of data.pads[group]) {
       if (pad.soundId <= 0) {
@@ -267,8 +288,13 @@ export async function collectSamples(
   progressCallback: ({ progress, status }: ExportStatus) => void,
   abortSignal: AbortSignal,
   exportAllPadsWithSamples = false,
+  keepUnusedPatterns = false,
 ) {
-  const projectSounds = getSoundsInfoFromProject(data, exportAllPadsWithSamples);
+  const projectSounds = getSoundsInfoFromProject(
+    data,
+    exportAllPadsWithSamples,
+    keepUnusedPatterns,
+  );
 
   const samples: { name: string; data: Blob }[] = [];
   const downloaded: string[] = [];