Fix #44 with Handlebars Templates

backend/src/modules/serialexecution.service.ts

@@ -1,6 +1,5 @@
 import dayjs from "dayjs";
 import quarterOfYear from "dayjs/plugin/quarterOfYear";
-import Handlebars from "handlebars";
 import axios from "axios";
 import { eq, inArray, and } from "drizzle-orm"; // Drizzle Operatoren
 
@@ -10,6 +9,7 @@ import { saveFile } from "../utils/files";
 import {FastifyInstance} from "fastify";
 import {useNextNumberRangeNumber} from "../utils/functions";
 import {createInvoicePDF} from "../utils/pdf"; // Achtung: Muss Node.js Buffer unterstützen!
+import { documentTemplateHandlebars } from "../utils/handlebars";
 
 dayjs.extend(quarterOfYear);
 
@@ -609,8 +609,8 @@ export function getDocumentDataBackend(
         };
     };
 
-    const templateStartText = Handlebars.compile(itemInfo.startText || "");
-    const templateEndText = Handlebars.compile(itemInfo.endText || "");
+    const templateStartText = documentTemplateHandlebars.compile(itemInfo.startText || "");
+    const templateEndText = documentTemplateHandlebars.compile(itemInfo.endText || "");
 
     // --- 6. Title Sums Formatting ---
     let returnTitleSums: Record<string, string> = {};

frontend/pages/createDocument/edit/[[id]].vue

@@ -1,9 +1,9 @@
 <script setup>
 import dayjs from "dayjs"
-import Handlebars from "handlebars"
 import { v4 as uuidv4 } from 'uuid';
 import {useFunctions} from "~/composables/useFunctions.js";
 import EntityModalButtons from "~/components/EntityModalButtons.vue";
+import { documentTemplateHandlebars } from "~/utils/handlebars";
 
 const dataStore = useDataStore()
 const profileStore = useProfileStore()
@@ -1098,8 +1098,8 @@ const getDocumentData = async () => {
   })
 
   //Compile Start & EndText
-  const templateStartText = Handlebars.compile(itemInfo.value.startText);
-  const templateEndText = Handlebars.compile(itemInfo.value.endText);
+  const templateStartText = documentTemplateHandlebars.compile(itemInfo.value.startText);
+  const templateEndText = documentTemplateHandlebars.compile(itemInfo.value.endText);
 
   const generateContext = (itemInfo, contactData) => {
     return {

frontend/pages/settings/texttemplates.vue

@@ -31,6 +31,12 @@ const variableDefinitions = [
   { key: '{{lohnkosten}}', label: 'Lohnkosten', desc: 'Ausgewiesene Lohnkosten' },
 ]
 
+const conditionalExamples = [
+  '{{#if vorname}}Hallo {{vorname}},{{/if}}',
+  '{{#if (eq zahlungsart "Überweisung")}}Bitte überweisen Sie den Betrag.{{/if}}',
+  '{{#if (gt zahlungsziel_in_tagen 14)}}Vielen Dank für Ihre Zahlung innerhalb des erweiterten Zahlungsziels.{{/if}}',
+]
+
 // --- Shortcuts ---
 defineShortcuts({
   '+': () => openModal()
@@ -148,7 +154,7 @@ const getDocLabel = (type) => {
         color="primary"
         variant="soft"
         title="Platzhalter nutzen"
-        description="Nutzen Sie die Variablen im Editor, um dynamische Inhalte (wie Kundennamen) automatisch einzufügen."
+        description="Nutzen Sie Variablen und Bedingungen im Editor, um dynamische Inhalte automatisch einzufügen."
         class="mb-4 mx-5 mt-2"
     />
 
@@ -313,6 +319,25 @@ const getDocLabel = (type) => {
               <UIcon name="i-heroicons-plus-circle" class="w-5 h-5 text-gray-300 group-hover:text-primary-500"/>
             </button>
           </div>
+
+          <div class="mt-6">
+            <h5 class="text-sm font-semibold mb-2 flex items-center gap-2">
+              <UIcon name="i-heroicons-code-bracket"/>
+              Bedingungen
+            </h5>
+            <p class="text-xs text-gray-500 mb-3">
+              Unterstuetzt sind zum Beispiel `eq`, `ne`, `gt`, `gte`, `lt`, `lte`, `and`, `or`, `not` und `includes`.
+            </p>
+            <div class="flex flex-col gap-2">
+              <code
+                  v-for="example in conditionalExamples"
+                  :key="example"
+                  class="text-xs whitespace-pre-wrap break-words rounded bg-white dark:bg-gray-900 px-2 py-1.5 border border-gray-200 dark:border-gray-700"
+              >
+                {{ example }}
+              </code>
+            </div>
+          </div>
         </div>
 
       </div>