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export const GRADIENT_PRESETS = [
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  "linear-gradient(135deg, #5e3497 0%, #2a2729 100%)",
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  "linear-gradient(135deg, #4d2a7c 0%, #1b181a 100%)",
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  "linear-gradient(135deg, #423f42 0%, #2a2729 100%)",
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  "linear-gradient(135deg, #7241b8 0%, #423f42 100%)",
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  "linear-gradient(135deg, #2a2729 0%, #5e3497 50%, #2a2729 100%)",
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  "linear-gradient(135deg, #3d2d4a 0%, #1b181a 100%)",
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  "linear-gradient(135deg, #2a2729 0%, #352530 100%)",
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  "linear-gradient(135deg, #423f42 0%, #3d2d4a 50%, #2a2729 100%)",
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  "linear-gradient(135deg, #8854d4 0%, #2a2729 100%)",
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  "linear-gradient(135deg, #1b181a 0%, #423f42 100%)",
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  "linear-gradient(135deg, #352530 0%, #423f42 100%)",
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  "linear-gradient(135deg, #2a2729 0%, #4d2a7c 50%, #1b181a 100%)",
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] as const;
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export type GradientPreset = (typeof GRADIENT_PRESETS)[number];
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const GRADIENT_PRESET_SET = new Set<string>(GRADIENT_PRESETS);
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const UPLOAD_COVER_URL = /^\/uploads\/([A-Za-z0-9_-]+)$/;
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export function isGradientPreset(value: string): value is GradientPreset {
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  return GRADIENT_PRESET_SET.has(value);
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}
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export function parseUploadCoverUrl(coverUrl: string): string | null {
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  return UPLOAD_COVER_URL.exec(coverUrl)?.[1] ?? null;
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}