Precompile schema validation function to get rid of ajv2020

src/pretix/control/templates/pretixcontrol/pdf/index.html

@@ -560,11 +560,10 @@
             </div>
         </div>
     </div>
-    <script type="text/plain" id="schema-url">{% static "schema/pdf-layout.schema.json" %}</script>
     <script type="text/javascript" src="{% static "pdfjs/pdf.js" %}"></script>
-    <script type="text/javascript" src="{% static "ajv/ajv2020.bundle.min.js" %}"></script>
     <script type="text/javascript" src="{% static "fabric/fabric.min.js" %}"></script>
     <script type="text/javascript" src="{% static "pretixcontrol/js/ui/editor.js" %}"></script>
+    <script type="text/javascript" src="{% static "schema/pdf-layout.validate.js" %}"></script>
     <img src="{% static 'pretixpresale/pdf/powered_by_pretix_dark.png' %}" id="poweredby-dark" class="sr-only">
     <img src="{% static 'pretixpresale/pdf/powered_by_pretix_white.png' %}" id="poweredby-white" class="sr-only">
     {% for family, styles in fonts.items %}

src/pretix/static/pretixcontrol/js/ui/editor.js

@@ -1,4 +1,7 @@
 /*globals $, gettext, fabric, PDFJS*/
+
+window.module = {}  // Hack to load ajv-compiled schema without actual module loading
+
 fabric.Poweredby = fabric.util.createClass(fabric.Image, {
     type: 'poweredby',
 
@@ -219,7 +222,6 @@ var editor = {
     uploaded_file_id: null,
     _window_loaded: false,
     _fabric_loaded: false,
-    schema: null,
 
     _px2mm: function (v) {
         return v / editor.pdf_scale / 72 * editor.pdf_page.userUnit * 25.4;
@@ -1320,14 +1322,11 @@ var editor = {
 
     _source_save: function () {
         try {
-            var Ajv = window.ajv2020
-            var ajv = new Ajv()
-            var validate = ajv.compile(editor.schema)
             var data = JSON.parse($("#source-textarea").val())
-            var valid = validate(data)
+            var valid = validate30(data)
 
             if (!valid) {
-                console.log(validate.errors)
+                console.log(validate30.errors)
                 alert("Invalid input syntax. If you're familiar with this, check out the developer console for a full " +
                       "error log. Otherwise, please contact support.")
             } else {
@@ -1463,10 +1462,6 @@ var editor = {
             editor._update_save_button();
         });
         $("#pdf-info-width, #pdf-info-height").bind('change input', editor._paper_size_warning);
-
-        $.getJSON($("#schema-url").text(), function (data) {
-            editor.schema = data;
-        })
     }
 };
 

src/pretix/static/schema/pdf-layout.schema.json

@@ -1,5 +1,6 @@
 {
   "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$comment": "If the schema is changed, regenerate pdf-layout.validate.js with $ ajv compile -s ./pretix/static/schema/pdf-layout.schema.json --spec=draft2020 -o ./pretix/static/schema/pdf-layout.validate.js",
   "title": "Ticket Layout",
   "description": "Dynamic elements for a PDF layout",
   "type": "array",