🔃 Refactor AudioFilters

src/utils/AudioFilters.ts

@@ -2,45 +2,13 @@ import { FiltersName } from "../types/types";
 
 const bass = (g: number) => `bass=g=${g}:f=110:w=0.3`;
 
-/**
+class AudioFilters {
- * The available audio filters
+    public constructor() {
- * @typedef {object} AudioFilters
+        return AudioFilters;
- * @property {string} bassboost_low The bassboost filter (+15dB)
+    }
- * @property {string} bassboost The bassboost filter (+20dB)
- * @property {string} bassboost_high The bassboost filter (+30dB)
- * @property {string} 8D The 8D filter
- * @property {string} vaporwave The vaporwave filter
- * @property {string} nightcore The nightcore filter
- * @property {string} phaser The phaser filter
- * @property {string} tremolo The tremolo filter
- * @property {string} vibrato The vibrato filter
- * @property {string} reverse The reverse filter
- * @property {string} treble The treble filter
- * @property {string} normalizer The normalizer filter (dynamic audio normalizer based)
- * @property {string} normalizer2 The normalizer filter (audio compressor based)
- * @property {string} surrounding The surrounding filter
- * @property {string} pulsator The pulsator filter
- * @property {string} subboost The subboost filter
- * @property {string} karaoke The kakaoke filter
- * @property {string} flanger The flanger filter
- * @property {string} gate The gate filter
- * @property {string} haas The haas filter
- * @property {string} mcompand The mcompand filter
- * @property {string} mono The mono filter
- * @property {string} mstlr The mstlr filter
- * @property {string} mstrr The mstrr filter
- * @property {string} compressor The compressor filter
- * @property {string} expander The expander filter
- * @property {string} softlimiter The softlimiter filter
- * @property {string} chorus The chorus filter
- * @property {string} chorus2d The chorus2d filter
- * @property {string} chorus3d The chorus3d filter
- * @property {string} fadein The fadein filter
- * @property {string} dim The dim filter
- * @property {string} earrape The earrape filter
- */
 
-const FilterList = {
+    public static get filters(): Record<FiltersName, string> {
+        return {
             bassboost_low: bass(15),
             bassboost: bass(20),
             bassboost_high: bass(30),
@@ -73,44 +41,67 @@ const FilterList = {
             chorus3d: "chorus=0.5:0.9:50|60|40:0.4|0.32|0.3:0.25|0.4|0.3:2|2.3|1.3",
             fadein: "afade=t=in:ss=0:d=10",
             dim: `afftfilt="'real=re * (1-clip((b/nb)*b,0,1))':imag='im * (1-clip((b/nb)*b,0,1))'"`,
-    earrape: "channelsplit,sidechaingate=level_in=64",
+            earrape: "channelsplit,sidechaingate=level_in=64"
-
-    *[Symbol.iterator](): IterableIterator<{ name: FiltersName; value: string }> {
-        for (const [k, v] of Object.entries(this)) {
-            if (typeof this[k as FiltersName] === "string") yield { name: k as FiltersName, value: v as string };
-        }
-    },
-
-    get names() {
-        return Object.keys(this).filter((p) => !["names", "length"].includes(p) && typeof this[p as FiltersName] !== "function") as FiltersName[];
-    },
-
-    get length() {
-        return Object.keys(this).filter((p) => !["names", "length"].includes(p) && typeof this[p as FiltersName] !== "function").length;
-    },
-
-    toString() {
-        return this.names.map((m) => (this as any)[m]).join(","); // eslint-disable-line @typescript-eslint/no-explicit-any
-    },
-
-    create(filter?: FiltersName[]): string {
-        if (!filter || !Array.isArray(filter)) return this.toString();
-        return filter
-            .filter((predicate) => typeof predicate === "string")
-            .map((m) => this[m])
-            .join(",");
-    },
-
-    define(filterName: string, value: string): void {
-        if (typeof this[filterName as FiltersName] && typeof this[filterName as FiltersName] === "function") return;
-
-        this[filterName as FiltersName] = value;
-    },
-
-    defineBulk(filterArray: { name: string; value: string }[]): void {
-        filterArray.forEach((arr) => this.define(arr.name, arr.value));
-    }
         };
+    }
 
-export default FilterList;
+    public static get<K extends FiltersName>(name: K) {
-export { FilterList as AudioFilters };
+        return this.filters[name];
+    }
+
+    public static has<K extends FiltersName>(name: K) {
+        return name in this.filters;
+    }
+
+    public static *[Symbol.iterator](): IterableIterator<{ name: FiltersName; value: string }> {
+        for (const [k, v] of Object.entries(this)) {
+            if (typeof this.filters[k as FiltersName] === "string") yield { name: k as FiltersName, value: v as string };
+        }
+    }
+
+    public static get names() {
+        return Object.keys(this).filter((p) => !["names", "length"].includes(p) && typeof this.filters[p as FiltersName] !== "function") as FiltersName[];
+    }
+
+    // @ts-expect-error AudioFilters.length
+    public static get length() {
+        return Object.keys(this).filter((p) => !["names", "length"].includes(p) && typeof this.filters[p as FiltersName] !== "function").length;
+    }
+
+    public static toString() {
+        return this.names.map((m) => (this as any)[m]).join(","); // eslint-disable-line @typescript-eslint/no-explicit-any
+    }
+
+    /**
+     * Create ffmpeg args from the specified filters name
+     * @param filter The filter name
+     * @returns
+     */
+    public static create(filters?: FiltersName[]) {
+        if (!filters || !Array.isArray(filters)) return this.toString();
+        return filters
+            .filter((predicate) => typeof predicate === "string")
+            .map((m) => this.get(m))
+            .join(",");
+    }
+
+    /**
+     * Defines audio filter
+     * @param filterName The name of the filter
+     * @param value The ffmpeg args
+     */
+    public static define(filterName: string, value: string) {
+        this.filters[filterName as FiltersName] = value;
+    }
+
+    /**
+     * Defines multiple audio filters
+     * @param filtersArray Array of filters containing the filter name and ffmpeg args
+     */
+    public static defineBulk(filtersArray: { name: string; value: string }[]) {
+        filtersArray.forEach((arr) => this.define(arr.name, arr.value));
+    }
+}
+
+export default AudioFilters;
+export { AudioFilters };