josedario87
ec40cd6826
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build-and-deploy / build-and-deploy (push) Successful in 2m28s
- Consolidar send.post.ts y send-media.post.ts en un único endpoint /send - Agregar servicio sticker-processor.ts para convertir imágenes a WebP 512x512 - Agregar toggle Imagen/Sticker en MediaPreview para enviar imágenes como stickers - Actualizar MessageInput y página de mensajes para usar endpoint unificado - Instalar dependencia sharp para procesamiento de imágenes
96 lines
2.5 KiB
TypeScript
96 lines
2.5 KiB
TypeScript
/**
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* Sticker Processor Service
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* Converts images to WhatsApp-compatible stickers (512x512 WebP)
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*/
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import sharp from 'sharp'
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// WhatsApp sticker requirements
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const STICKER_SIZE = 512
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const MAX_STICKER_KB = 100 // WhatsApp limit for static stickers
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export interface StickerResult {
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buffer: Buffer
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mimetype: string
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}
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/**
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* Convert an image buffer to a WhatsApp-compatible sticker
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* Requirements:
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* - WebP format
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* - 512x512 pixels (will resize maintaining aspect ratio and add padding)
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* - Max 100KB for static stickers
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*/
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export async function convertToSticker(
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inputBuffer: Buffer,
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inputMimetype: string
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): Promise<StickerResult> {
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// Validate input is an image
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if (!inputMimetype.startsWith('image/')) {
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throw new Error('Input must be an image')
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}
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// Process with sharp - resize to fit 512x512 with transparent padding
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let quality = 100
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let buffer = await sharp(inputBuffer)
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.resize(STICKER_SIZE, STICKER_SIZE, {
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fit: 'contain',
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background: { r: 0, g: 0, b: 0, alpha: 0 } // Transparent background
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})
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.webp({ quality, lossless: false })
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.toBuffer()
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// If too large, reduce quality iteratively
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while (buffer.length > MAX_STICKER_KB * 1024 && quality > 10) {
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quality -= 10
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buffer = await sharp(inputBuffer)
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.resize(STICKER_SIZE, STICKER_SIZE, {
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fit: 'contain',
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background: { r: 0, g: 0, b: 0, alpha: 0 }
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})
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.webp({ quality, lossless: false })
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.toBuffer()
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}
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// If still too large after quality reduction, try resizing smaller
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if (buffer.length > MAX_STICKER_KB * 1024) {
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let size = STICKER_SIZE
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while (buffer.length > MAX_STICKER_KB * 1024 && size > 128) {
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size -= 64
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buffer = await sharp(inputBuffer)
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.resize(size, size, {
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fit: 'contain',
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background: { r: 0, g: 0, b: 0, alpha: 0 }
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})
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.webp({ quality: 80, lossless: false })
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.toBuffer()
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}
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// Resize back to 512x512 for WhatsApp compatibility
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if (size < STICKER_SIZE) {
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buffer = await sharp(buffer)
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.resize(STICKER_SIZE, STICKER_SIZE, {
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fit: 'contain',
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background: { r: 0, g: 0, b: 0, alpha: 0 }
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})
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.toBuffer()
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}
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}
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return {
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buffer,
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mimetype: 'image/webp'
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}
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}
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/**
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* Check if an image can be converted to a sticker
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*/
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export function canConvertToSticker(mimetype: string): boolean {
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const supportedTypes = [
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'image/jpeg',
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'image/png',
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'image/webp',
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'image/gif' // Will take first frame
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]
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return supportedTypes.includes(mimetype)
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}
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