Refactor receipt printing and template rendering logic

- Updated the `ReceiptInterface` to await the `printImageBuffer` method for proper asynchronous handling.
- Modified the `renderTemplateJPG` method in `SocketClient` to accept an image type parameter and improved error handling for template download failures.
- Enhanced the response handling to correctly parse and return image data based on the content type.

src/documentprinter/interfaces/receiptinterface.js

@@ -142,7 +142,7 @@ export default class ReceiptInterface {
         const imageBuffer = Buffer.isBuffer(image)
           ? Buffer.from(image)
           : Buffer.from(image);
-        this.receiptPrinter.printImageBuffer(imageBuffer);
+        await this.receiptPrinter.printImageBuffer(imageBuffer);
         this.receiptPrinter.cut();
       }
 
@@ -168,21 +168,24 @@ export default class ReceiptInterface {
       `Deploying job ${documentJob._id} to receipt printer ${this.name}`
     );
 
-    const jpgObj =
-      await this.documentPrinterClient.socketClient.renderTemplateJPG({
-        _id: documentTemplate._id,
-        content: documentTemplate.content,
-        object: object,
-        width: 512,
-      });
+    const imageObj =
+      await this.documentPrinterClient.socketClient.renderTemplateJPG(
+        {
+          _id: documentTemplate._id,
+          content: documentTemplate.content,
+          object: object,
+          width: 512,
+        },
+        "png",
+      );
 
-    if (!jpgObj || !jpgObj.images) {
+    if (!imageObj || !imageObj.images) {
       throw new Error(
-        jpgObj?.error || "Failed to render document template to image"
+        imageObj?.error || "Failed to render document template to image"
       );
     }
 
-    this.images.set(documentJob._id, jpgObj.images);
+    this.images.set(documentJob._id, imageObj.images);
     return { success: true };
   }
 

src/socket/socketclient.js

@@ -1,6 +1,7 @@
 import log4js from "log4js";
 import { WebSocketScanner } from "../network/websocketScanner.js";
 import { io } from "socket.io-client";
+import axios from "axios";
 // Load configuration
 import { loadConfig, saveConfig } from "../config.js";
 import { getDeviceInfo } from "../utils.js";
@@ -510,34 +511,87 @@ export class SocketClient {
     });
   }
 
-  async renderTemplatePDF(templateData) {
-    logger.debug("Rendering template PDF...", templateData);
-    return new Promise((resolve, reject) => {
-      this.socket.emit("renderTemplatePDF", templateData, (result) => {
-        if (result && result.error) {
-          logger.error("Failed to render template PDF:", result.error);
-          reject(new Error(result.error));
-        } else {
-          logger.trace("Template PDF rendered successfully.");
-          resolve(result);
-        }
-      });
-    });
+  getApiUrl() {
+    return this.fileManager.getApiUrl();
   }
 
-  async renderTemplateJPG(templateData) {
-    logger.debug("Rendering template JPG...", templateData);
-    return new Promise((resolve, reject) => {
-      this.socket.emit("renderTemplateJPG", templateData, (result) => {
-        if (result && result.error) {
-          logger.error("Failed to render template JPG:", result.error);
-          reject(new Error(result.error));
-        } else {
-          logger.trace("Template JPG rendered successfully.");
-          resolve(result);
-        }
-      });
-    });
+  getApiHeaders() {
+    return {
+      "X-Auth-Code": config.host.authCode,
+      "X-Host-Id": config.host.id || this.id,
+    };
+  }
+
+  parseTemplateDownloadError(error) {
+    const data = error?.response?.data;
+    if (data instanceof ArrayBuffer || Buffer.isBuffer(data)) {
+      try {
+        const parsed = JSON.parse(Buffer.from(data).toString("utf8"));
+        return parsed?.error || error.message;
+      } catch (parseError) {
+        return error.message;
+      }
+    }
+    return data?.error || error.message;
+  }
+
+  async renderTemplatePDF(templateData) {
+    logger.debug("Rendering template PDF...", templateData);
+    try {
+      const response = await axios.post(
+        `${this.getApiUrl()}/documenttemplates/${templateData._id}/download`,
+        {
+          content: templateData.content,
+          object: templateData.object,
+        },
+        {
+          params: { type: "pdf" },
+          responseType: "arraybuffer",
+          headers: this.getApiHeaders(),
+        },
+      );
+      logger.trace("Template PDF rendered successfully.");
+      return { pdf: Buffer.from(response.data) };
+    } catch (error) {
+      const message = this.parseTemplateDownloadError(error);
+      logger.error("Failed to render template PDF:", message);
+      throw new Error(message);
+    }
+  }
+
+  async renderTemplateJPG(templateData, type = "jpeg") {
+    logger.debug(`Rendering template ${type.toUpperCase()}...`, templateData);
+    try {
+      const response = await axios.post(
+        `${this.getApiUrl()}/documenttemplates/${templateData._id}/download`,
+        {
+          content: templateData.content,
+          object: templateData.object,
+          width: templateData.width,
+        },
+        {
+          params: { type },
+          responseType: "arraybuffer",
+          headers: this.getApiHeaders(),
+        },
+      );
+      const contentType = response.headers["content-type"] || "";
+      if (contentType.includes("application/json")) {
+        const payload = JSON.parse(Buffer.from(response.data).toString("utf8"));
+        logger.trace("Template JPG rendered successfully.");
+        return {
+          images: (payload.images || []).map((image) =>
+            Buffer.from(image, "base64"),
+          ),
+        };
+      }
+      logger.trace("Template JPG rendered successfully.");
+      return { images: [Buffer.from(response.data)] };
+    } catch (error) {
+      const message = this.parseTemplateDownloadError(error);
+      logger.error("Failed to render template JPG:", message);
+      throw new Error(message);
+    }
   }
 
   async subscribeToObjectActions({ objectType, _id }) {