Move more extensions to extensions
1 files changed, 92 insertions, 0 deletions
diff --git a/src/extensions/Random.ts b/src/extensions/Random.ts
new file mode 100644
index 00000000..212e1c9a
--- /dev/null
+++ b/src/extensions/Random.ts
@@ -0,0 +1,92 @@
+/*
+ Spacebar: A FOSS re-implementation and extension of the Discord.com backend.
+ Copyright (C) 2026 Spacebar and Spacebar Contributors
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+*/
+
+// Inspired by dotnet: https://learn.microsoft.com/en-us/dotnet/api/system.random?view=net-9.0#methods
+export class Random {
+ public static nextInt(min?: number, max?: number): number {
+ if (min === undefined && max === undefined) {
+ // Next()
+ return Math.floor(Math.random() * Number.MAX_SAFE_INTEGER);
+ } else if (max === undefined) {
+ // Next(Int32)
+ if (min! <= 0) throw new RangeError("min must be greater than 0");
+ return Math.floor(Math.random() * min!);
+ } else {
+ // Next(Int32, Int32)
+ if (min! >= max!) throw new RangeError("min must be less than max");
+ return Math.floor(Math.random() * (max! - min!)) + min!;
+ }
+ }
+
+ public static nextDouble(min?: number, max?: number): number {
+ if (min === undefined && max === undefined) {
+ // NextDouble()
+ return Math.random();
+ } else if (max === undefined) {
+ // NextDouble(Double)
+ if (min! <= 0) throw new RangeError("min must be greater than 0");
+ return Math.random() * min!;
+ } else {
+ // NextDouble(Double, Double)
+ if (min! >= max!) throw new RangeError("min must be less than max");
+ return Math.random() * (max! - min!) + min!;
+ }
+ }
+
+ public static nextBytes(count: number): Uint8Array {
+ if (count <= 0) throw new RangeError("count must be greater than 0");
+ const arr = new Uint8Array(count);
+ for (let i = 0; i < count; i++) {
+ arr[i] = Math.floor(Math.random() * 256);
+ }
+ return arr;
+ }
+
+ public static nextBytesArray(count: number) {
+ if (count <= 0) throw new RangeError("count must be greater than 0");
+ const arr = [];
+ for (let i = 0; i < count; i++) {
+ arr.push(Math.floor(Math.random() * 256));
+ }
+ return arr;
+ }
+
+ public static getItems<T>(items: T[], count: number): T[] {
+ if (count <= 0) throw new RangeError("count must be greater than 0");
+ if (count >= items.length) return this.shuffle(items);
+ const usedIndices = new Set<number>();
+ const result: T[] = [];
+ while (result.length < count && usedIndices.size < items.length) {
+ const index = Math.floor(Math.random() * items.length);
+ if (!usedIndices.has(index)) {
+ usedIndices.add(index);
+ result.push(items[index]);
+ }
+ }
+ return result;
+ }
+
+ public static shuffle<T>(items: T[]): T[] {
+ const array = [...items];
+ for (let i = array.length - 1; i > 0; i--) {
+ const j = Math.floor(Math.random() * (i + 1));
+ [array[i], array[j]] = [array[j], array[i]];
+ }
+ return array;
+ }
+}
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