78 lines
2.3 KiB
JavaScript
78 lines
2.3 KiB
JavaScript
import sharp from "sharp";
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import {Logger} from "../logging/logger.js";
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export class NameCardCreator {
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/**
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* Combines a template image with a user avatar and saves it
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* @param {string} templatePath - path to the template image
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* @param {string} avatarPath - path to the avatar
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* @returns {Promise<sharp.OutputInfo>} resulting image buffer
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*/
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static async getWelcomeCard(templatePath, avatarPath) {
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try{
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const template = await this.loadTemplate(templatePath);
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const avatar = await this.handleAvatar(avatarPath);
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const result = await template
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.composite([{
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input: avatar,
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top: 215,
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left: 200,
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}])
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.toFile("namecard.png")
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console.log("✅ Welcome card created: welcome-card.png");
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return result;
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} catch(err) {
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await Logger.error("Unable to create name card", err);
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}
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}
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/**
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* Loads the template file into a sharp instance
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* @param {string} path - file path
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* @returns {sharp.Sharp} sharp image object
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*/
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static async loadTemplate(path) {
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return sharp(path);
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}
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/**
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* Overlays an image (item) on top of a base image
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* @param {sharp.Sharp|string} base - sharp image or path
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* @param {{item:string, x:number, y:number}} overlay - overlay info
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* @returns {Promise<sharp.Sharp>} combined image
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*/
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static async mergeBitmaps(base, { item, x, y }) {
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return null;
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}
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static async handleAvatar(avatarPath) {
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const avatarSize = 670;
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const borderSize = 8;
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const radius = avatarSize / 2;
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const totalSize = avatarSize + borderSize * 2;
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const avatarBuffer = await sharp(avatarPath)
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.resize(avatarSize, avatarSize, { fit: "cover" })
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.png()
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.toBuffer();
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return await sharp({
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create: {
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width: totalSize,
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height: totalSize,
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channels: 4,
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background: "#0000"
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}
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})
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.composite([
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{ input: avatarBuffer, top: borderSize, left: borderSize }
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])
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.png()
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.toBuffer();
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}
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} |