feat: add label configuration fields to barcode templates and implement zero-padding support in variable replacement

paperless-backend/src/barcode/barcode-templates.controller.ts

@@ -13,7 +13,7 @@ import {
 } from '@nestjs/common';
 import { InjectRepository } from '@nestjs/typeorm';
 import { Repository } from 'typeorm';
-import { BarcodeTemplate, type BarcodeActionType } from '../database/entities/barcode-template.entity';
+import { BarcodeTemplate, type BarcodeActionType, type LabelInputField, type LabelElement } from '../database/entities/barcode-template.entity';
 import { RequirePermissions } from '../auth/permissions.decorator';
 import { Permission } from '../auth/permissions.enum';
 import { BarcodeScannerService } from './barcode-scanner.service';
@@ -26,6 +26,14 @@ interface UpsertDto {
   SplitBefore?: boolean;
   DateinameTemplate?: string | null;
   Actions?: BarcodeActionType[];
+  LabelEnabled?: boolean;
+  LabelWidthMm?: number | null;
+  LabelHeightMm?: number | null;
+  LabelInputFields?: LabelInputField[] | null;
+  LabelGetUrl?: string | null;
+  LabelPrintedUrl?: string | null;
+  LabelReleaseUrl?: string | null;
+  LabelLayout?: LabelElement[] | null;
 }
 
 function validate(dto: UpsertDto, partial = false): void {
@@ -94,6 +102,14 @@ export class BarcodeTemplatesController {
       SplitBefore: dto.SplitBefore ?? false,
       DateinameTemplate: dto.DateinameTemplate ?? null,
       Actions: dto.Actions!,
+      LabelEnabled: dto.LabelEnabled ?? false,
+      LabelWidthMm: dto.LabelWidthMm ?? null,
+      LabelHeightMm: dto.LabelHeightMm ?? null,
+      LabelInputFields: dto.LabelInputFields ?? null,
+      LabelGetUrl: dto.LabelGetUrl ?? null,
+      LabelPrintedUrl: dto.LabelPrintedUrl ?? null,
+      LabelReleaseUrl: dto.LabelReleaseUrl ?? null,
+      LabelLayout: dto.LabelLayout ?? null,
     });
     const saved = await this.repo.save(entity);
     this.scanner.invalidateTemplates();
@@ -114,6 +130,14 @@ export class BarcodeTemplatesController {
     if (dto.SplitBefore !== undefined) existing.SplitBefore = dto.SplitBefore;
     if (dto.DateinameTemplate !== undefined) existing.DateinameTemplate = dto.DateinameTemplate ?? null;
     if (dto.Actions !== undefined) existing.Actions = dto.Actions;
+    if (dto.LabelEnabled !== undefined) existing.LabelEnabled = dto.LabelEnabled;
+    if (dto.LabelWidthMm !== undefined) existing.LabelWidthMm = dto.LabelWidthMm ?? null;
+    if (dto.LabelHeightMm !== undefined) existing.LabelHeightMm = dto.LabelHeightMm ?? null;
+    if (dto.LabelInputFields !== undefined) existing.LabelInputFields = dto.LabelInputFields ?? null;
+    if (dto.LabelGetUrl !== undefined) existing.LabelGetUrl = dto.LabelGetUrl ?? null;
+    if (dto.LabelPrintedUrl !== undefined) existing.LabelPrintedUrl = dto.LabelPrintedUrl ?? null;
+    if (dto.LabelReleaseUrl !== undefined) existing.LabelReleaseUrl = dto.LabelReleaseUrl ?? null;
+    if (dto.LabelLayout !== undefined) existing.LabelLayout = dto.LabelLayout ?? null;
 
     const saved = await this.repo.save(existing);
     this.scanner.invalidateTemplates();

paperless-backend/src/label-print-agent/label-print-agent.service.ts

@@ -6,7 +6,17 @@ import { BarcodeTemplate } from '../database/entities/barcode-template.entity';
 import { LabelRendererService } from './label-renderer.service';
 
 function applyVars(template: string, vars: Record<string, string>): string {
-  return template.replace(/\{([^}]+)\}/g, (_, key) => vars[key] ?? '');
+  return template.replace(/\{([^}]+)\}/g, (_, key: string) => {
+    const colonIdx = key.indexOf(':');
+    if (colonIdx !== -1) {
+      const varName = key.slice(0, colonIdx);
+      const width = parseInt(key.slice(colonIdx + 1), 10);
+      if (!isNaN(width) && varName in vars) {
+        return vars[varName].padStart(width, '0');
+      }
+    }
+    return vars[key] ?? '';
+  });
 }
 
 function lockExpiry(): Date {

paperless-backend/src/label-print-agent/label-renderer.service.ts

@@ -14,7 +14,17 @@ function escape(s: string): string {
 }
 
 function applyVars(template: string, vars: Record<string, string>): string {
-  return template.replace(/\{([^}]+)\}/g, (_, key) => vars[key] ?? `{${key}}`);
+  return template.replace(/\{([^}]+)\}/g, (_, key: string) => {
+    const colonIdx = key.indexOf(':');
+    if (colonIdx !== -1) {
+      const varName = key.slice(0, colonIdx);
+      const width = parseInt(key.slice(colonIdx + 1), 10);
+      if (!isNaN(width) && varName in vars) {
+        return vars[varName].padStart(width, '0');
+      }
+    }
+    return vars[key] ?? `{${key}}`;
+  });
 }
 
 @Injectable()