feat(invoice): add e-invoice support with XRechnung/ZUGFeRD and advanced export features

ts/skr.export.accounts.ts

@@ -0,0 +1,154 @@
+import * as plugins from './plugins.js';
+import * as path from 'path';
+import type { IAccountData, TSKRType } from './skr.types.js';
+
+// Extended interface for export with additional fields
+export interface IAccountDataExport extends IAccountData {
+  parentAccount?: string;
+  defaultTaxCode?: string;
+  activeFrom?: Date | string;
+  activeTo?: Date | string;
+}
+
+export interface IAccountExportRow {
+  account_code: string;
+  name: string;
+  type: string;
+  class: number;
+  parent?: string;
+  skr_set: TSKRType;
+  tax_code_default?: string;
+  active_from?: string;
+  active_to?: string;
+  description?: string;
+  is_active: boolean;
+}
+
+export class AccountsExporter {
+  private exportPath: string;
+  private accounts: IAccountExportRow[] = [];
+  
+  constructor(exportPath: string) {
+    this.exportPath = exportPath;
+  }
+
+  /**
+   * Adds an account to the export
+   */
+  public addAccount(account: IAccountDataExport): void {
+    const exportRow: IAccountExportRow = {
+      account_code: account.accountNumber,
+      name: account.accountName,
+      type: account.accountType,
+      class: account.accountClass,
+      parent: account.parentAccount,
+      skr_set: account.skrType,
+      tax_code_default: account.defaultTaxCode,
+      active_from: account.activeFrom ? this.formatDate(account.activeFrom) : undefined,
+      active_to: account.activeTo ? this.formatDate(account.activeTo) : undefined,
+      description: account.description,
+      is_active: account.isActive !== false
+    };
+    
+    this.accounts.push(exportRow);
+  }
+
+  /**
+   * Exports accounts to CSV format
+   */
+  public async exportToCSV(): Promise<void> {
+    const csvPath = path.join(this.exportPath, 'data', 'accounting', 'accounts.csv');
+    await plugins.smartfile.fs.ensureDir(path.dirname(csvPath));
+    
+    // Create CSV header
+    const headers = [
+      'account_code',
+      'name',
+      'type',
+      'class',
+      'parent',
+      'skr_set',
+      'tax_code_default',
+      'active_from',
+      'active_to',
+      'description',
+      'is_active'
+    ];
+    
+    let csvContent = headers.join(',') + '\n';
+    
+    // Add account rows
+    for (const account of this.accounts) {
+      const row = [
+        this.escapeCSV(account.account_code),
+        this.escapeCSV(account.name),
+        this.escapeCSV(account.type),
+        account.class.toString(),
+        this.escapeCSV(account.parent || ''),
+        this.escapeCSV(account.skr_set),
+        this.escapeCSV(account.tax_code_default || ''),
+        this.escapeCSV(account.active_from || ''),
+        this.escapeCSV(account.active_to || ''),
+        this.escapeCSV(account.description || ''),
+        account.is_active.toString()
+      ];
+      
+      csvContent += row.join(',') + '\n';
+    }
+    
+    await plugins.smartfile.memory.toFs(csvContent, csvPath);
+  }
+
+  /**
+   * Exports accounts to JSON format (alternative)
+   */
+  public async exportToJSON(): Promise<void> {
+    const jsonPath = path.join(this.exportPath, 'data', 'accounting', 'accounts.json');
+    await plugins.smartfile.fs.ensureDir(path.dirname(jsonPath));
+    
+    const jsonData = {
+      schema_version: '1.0',
+      export_date: new Date().toISOString(),
+      accounts: this.accounts
+    };
+    
+    await plugins.smartfile.memory.toFs(
+      JSON.stringify(jsonData, null, 2),
+      jsonPath
+    );
+  }
+
+  /**
+   * Escapes CSV values
+   */
+  private escapeCSV(value: string): string {
+    if (value.includes(',') || value.includes('"') || value.includes('\n')) {
+      return `"${value.replace(/"/g, '""')}"`;
+    }
+    return value;
+  }
+
+  /**
+   * Formats a date to ISO date string
+   */
+  private formatDate(date: Date | string): string {
+    if (typeof date === 'string') {
+      return date.split('T')[0];
+    }
+    return date.toISOString().split('T')[0];
+  }
+
+  /**
+   * Gets the number of accounts
+   */
+  public getAccountCount(): number {
+    return this.accounts.length;
+  }
+
+  /**
+   * Clears the accounts list
+   */
+  public clear(): void {
+    this.accounts = [];
+  }
+}