42 lines
1.1 KiB
TypeScript
42 lines
1.1 KiB
TypeScript
// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
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// See LICENSE.txt for license information.
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export function isArrayOf<T>(v: unknown, check: (e: unknown) => boolean): v is T[] {
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if (!Array.isArray(v)) {
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return false;
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}
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return v.every(check);
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}
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export function isStringArray(v: unknown): v is string[] {
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return isArrayOf(v, (e) => typeof e === 'string');
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}
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export function isRecordOf<T>(v: unknown, check: (e: unknown) => boolean): v is Record<string, T> {
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if (typeof v !== 'object' || !v) {
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return false;
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}
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if (!(Object.keys(v).every((k) => typeof k === 'string'))) {
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return false;
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}
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if (!(Object.values(v).every(check))) {
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return false;
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}
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return true;
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}
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export function ensureString(v: unknown): string {
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return typeof v === 'string' ? v : '';
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}
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export function ensureNumber(v: unknown): number {
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return typeof v === 'number' ? v : 0;
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}
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export function secureGetFromRecord<T>(v: Record<string, T> | undefined, key: string) {
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return typeof v === 'object' && v && Object.prototype.hasOwnProperty.call(v, key) ? v[key] : undefined;
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}
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