Initial commit

wwwroot/core/welcome/nameCardCreator.js

@@ -0,0 +1,78 @@
+import sharp from "sharp";
+import {Logger} from "../logging/logger.js";
+
+export class NameCardCreator {
+
+    /**
+     * Combines a template image with a user avatar and saves it
+     * @param {string} templatePath - path to the template image
+     * @param {string} avatarPath - path to the avatar
+     * @returns {Promise<sharp.OutputInfo>} resulting image buffer
+     */
+    static async getWelcomeCard(templatePath, avatarPath) {
+        try{
+
+            const template = await this.loadTemplate(templatePath);
+
+            const avatar = await this.handleAvatar(avatarPath);
+
+            const result = await template
+                .composite([{
+                    input: avatar,
+                    top: 215,
+                    left: 200,
+                }])
+                .toFile("namecard.png")
+
+            console.log("✅ Welcome card created: welcome-card.png");
+            return result;
+        } catch(err) {
+            await Logger.error("Unable to create name card", err);
+        }
+    }
+
+    /**
+     * Loads the template file into a sharp instance
+     * @param {string} path - file path
+     * @returns {sharp.Sharp} sharp image object
+     */
+    static async loadTemplate(path) {
+        return sharp(path);
+    }
+
+    /**
+     * Overlays an image (item) on top of a base image
+     * @param {sharp.Sharp|string} base - sharp image or path
+     * @param {{item:string, x:number, y:number}} overlay - overlay info
+     * @returns {Promise<sharp.Sharp>} combined image
+     */
+    static async mergeBitmaps(base, { item, x, y }) {
+        return null;
+    }
+
+    static async handleAvatar(avatarPath) {
+        const avatarSize = 670;
+        const borderSize = 8;
+        const radius = avatarSize / 2;
+        const totalSize = avatarSize + borderSize * 2;
+
+        const avatarBuffer = await sharp(avatarPath)
+            .resize(avatarSize, avatarSize, { fit: "cover" })
+            .png()
+            .toBuffer();
+
+        return await sharp({
+            create: {
+                width: totalSize,
+                height: totalSize,
+                channels: 4,
+                background: "#0000"
+            }
+        })
+            .composite([
+                { input: avatarBuffer, top: borderSize, left: borderSize }
+            ])
+            .png()
+            .toBuffer();
+    }
+}