Add media segment manager

2024-10-02 17:09:59 -04:00
parent 809dba510a
commit b93450098a
7 changed files with 179 additions and 14 deletions
@@ -0,0 +1,41 @@
+import type { MediaSegmentDto } from '@jellyfin/sdk/lib/generated-client/models/media-segment-dto';
+
+const isBeforeSegment = (segment: MediaSegmentDto, time: number, direction: number) => {
+    if (direction === -1) {
+        return (
+            typeof segment.EndTicks !== 'undefined'
+            && segment.EndTicks < time
+        );
+    }
+    return (
+        typeof segment.StartTicks !== 'undefined'
+        && segment.StartTicks > time
+    );
+};
+
+const isInSegment = (segment: MediaSegmentDto, time: number) => (
+    typeof segment.StartTicks !== 'undefined'
+    && segment.StartTicks < time
+    && (typeof segment.EndTicks === 'undefined' || segment.EndTicks > time)
+);
+
+export const findCurrentSegment = (segments: MediaSegmentDto[], time: number, lastIndex = 0) => {
+    const lastSegment = segments[lastIndex];
+    if (isInSegment(lastSegment, time)) {
+        return { index: lastIndex, segment: lastSegment };
+    }
+
+    let direction = 1;
+    if (lastIndex > 0 && lastSegment.StartTicks && lastSegment.StartTicks > time) {
+        direction = -1;
+    }
+
+    for (
+        let index = lastIndex, segment = segments[index];
+        index >= 0 && index < segments.length;
+        index += direction, segment = segments[index]
+    ) {
+        if (isBeforeSegment(segment, time, direction)) return;
+        if (isInSegment(segment, time)) return { index, segment };
+    }
+};