79 lines
2.1 KiB
TypeScript
79 lines
2.1 KiB
TypeScript
import { existsSync } from 'fs'
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import path from 'path'
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import sharp from 'sharp'
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import { getWhiteBackgroundPreviewRelativePathFromAssetPath } from '@/lib/standard-model-white-background'
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export const WHITE_BACKGROUND_PREVIEW_MAX_DIMENSION = 1500
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const WHITE_BACKGROUND_ORIGINAL_WEBP_OPTIONS = {
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quality: 92,
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alphaQuality: 100,
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}
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const WHITE_BACKGROUND_PREVIEW_WEBP_OPTIONS = {
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quality: 82,
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alphaQuality: 100,
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}
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function isHttpUrl(url?: string | null): boolean {
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return /^https?:\/\//i.test(String(url || '').trim())
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}
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function normalizeRootRelativePath(fileUrl: string): string {
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const normalized = fileUrl.trim().replace(/\\/g, '/').replace(/^\.?\//, '')
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return normalized ? `/${normalized}` : ''
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}
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function resolveAbsoluteLocalPath(fileUrl: string): string {
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const normalized = fileUrl.trim().replace(/\\/g, '/')
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if (path.isAbsolute(normalized)) {
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return normalized
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}
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return path.join(process.cwd(), normalized.replace(/^\/+/, ''))
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}
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export async function buildWhiteBackgroundWebpVariants(buffer: Buffer) {
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const original = await sharp(buffer)
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.rotate()
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.webp(WHITE_BACKGROUND_ORIGINAL_WEBP_OPTIONS)
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.toBuffer()
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const preview = await sharp(buffer)
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.rotate()
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.resize({
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width: WHITE_BACKGROUND_PREVIEW_MAX_DIMENSION,
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height: WHITE_BACKGROUND_PREVIEW_MAX_DIMENSION,
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fit: 'inside',
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withoutEnlargement: true,
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})
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.webp(WHITE_BACKGROUND_PREVIEW_WEBP_OPTIONS)
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.toBuffer()
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return {
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original,
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preview,
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}
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}
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export function resolveWhiteBackgroundPreviewFileUrl(fileUrl?: string | null): string | null {
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const normalizedFileUrl = String(fileUrl || '').trim()
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if (!normalizedFileUrl) {
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return null
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}
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if (isHttpUrl(normalizedFileUrl)) {
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return normalizedFileUrl
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}
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const previewRelativePath = getWhiteBackgroundPreviewRelativePathFromAssetPath(normalizedFileUrl)
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if (previewRelativePath) {
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const previewAbsolutePath = resolveAbsoluteLocalPath(previewRelativePath)
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if (existsSync(previewAbsolutePath)) {
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return normalizeRootRelativePath(previewRelativePath)
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}
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}
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return normalizeRootRelativePath(normalizedFileUrl)
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}
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