type inference helpers for converting options to tracks

Signed-off-by: eternal-flame-AD <[email protected]>

js/igv.d.ts

@@ -6,7 +6,8 @@ declare class Opaque<N extends string> {
     private readonly __opaque_brand: N;
 }
 
-export type TrackLoad = Tracks.TrackCommonOptions &
+export type TrackLoad =
+    Tracks.TrackCommonOptions &
     ((Tracks.AnnotationTrackOptions & Tracks.TypeFormatPair<'annotation', Tracks.AnnotationFormat>) |
         (Tracks.WigTrackOptions & Tracks.TypeFormatPair<'wig', Tracks.WigFormat>) |
         (Tracks.WigMergedTrackOptions & { type: 'merged' }) |
@@ -15,8 +16,20 @@ export type TrackLoad = Tracks.TrackCommonOptions &
         (Tracks.SegTrackOptions & Tracks.TypeFormatPair<'seg', Tracks.SegTrackFormat>) |
         (Tracks.CnvPyTorTrackOptions & Tracks.TypeFormatPair<'cnvpytor', Tracks.CnvPyTorFormat>));
 
+export type TrackOf<T extends string> =
+    T extends "annotation" ? Tracks.Track :
+    T extends "alignment" ? Tracks.AlignmentTrack :
+    T extends "variant" ? Tracks.Track :
+    T extends "seg" ? Tracks.Track :
+    T extends "cnvpytor" ? Tracks.Track :
+    T extends "wig" ? Tracks.Track :
+    T extends "merged" ? Tracks.Track :
+    never;
+
+export type TrackOfLoad<K extends TrackLoad> = K extends { type: infer T } ? T extends string ? TrackOf<T> : never : never;
+
 export namespace Tracks {
-    export declare class Track { }; \
+    export class Track { }
 
     export interface TypeFormatPair<K extends string, F extends string> {
         type?: K;
@@ -314,7 +327,6 @@ export namespace Tracks {
         "strand" | "firstOfPairStrand" | "pairOrientation" | "mateChr" | "chimeric" | "supplementary" | "readOrder" | AlignmentBy;
         samplingWindowSize?: number;
         samplingDepth?: number;
-        alignmentRowHeight?: number;
         readGroup?: string;
         sort: AlignmentSortOptions;
         filter: {
@@ -347,17 +359,17 @@ export namespace Tracks {
         )
 
 
-    export declare class AlignmentTrack extends Track {
+    class AlignmentTrack extends Track {
         setHighlightedReads(readNames: string[], color: string): void;
         sort(options: AlignmentSortOptions): void;
-    };
+    }
 }
 
 type Nucleotide = 'A' | 'C' | 'G' | 'T' | 'N';
 type AnnotationFormat = 'bed' | 'gff3' | 'gtf' | 'genePred' | 'genePredExt' | 'peaks' | 'narrowPeak' | 'broadPeak' | 'bigBed' | 'bedpe';
 
 interface GenomeNoRef {
-    genome: string;
+    genome: HostedGenomes | (string & {});
     reference?: never;
 }
 
@@ -520,17 +532,18 @@ interface DefineROI {
     color: string;
 }
 
+
 declare class _Browser {
     currentLoci(): string[] | string;
     loadGenome(genome: string | ReferenceGenome): Promise<void>;
     loadSessionObject(session: Opaque<'igv.js session JSON'>): void;
     loadSession(session: string): void;
     // TODO: check the return type
-    loadTrack(track: TrackLoad): Promise<any>;
+    loadTrack(track: TrackLoad): Promise<Tracks.Track>;
     loadSampleInfo({ url: string }): void;
-    findTracks(func: (track: Track) => boolean): Track[];
-    findTracks(property: string, value: any): Track[];
-    removeTrack(track: Track): void;
+    findTracks(func: (track: Tracks.Track) => boolean): Tracks.Track[];
+    findTracks(property: string, value: any): Tracks.Track[];
+    removeTrack(track: Tracks.Track): void;
     removeTrackByName(trackName: string): void;
     loadROI(roi: DefineROI | DefineROI[]): void;
     clearROIs(): void;