engine for repeating headers

app/Services/PdfMaker/PdfMaker.php

@@ -62,13 +62,13 @@ class PdfMaker
             $this->updateVariables($this->data['variables']);
         }
 
+        $this->processOptions();
+
         return $this;
     }
 
     public function getCompiledHTML($final = false)
     {
-        $this->processOptions();
-
         if ($final) {
             $html = $this->document->saveXML();
             

app/Services/PdfMaker/PdfMakerUtilities.php

@@ -13,6 +13,7 @@
 namespace App\Services\PdfMaker;
 
 use DOMDocument;
+use DOMDomError;
 use DOMXPath;
 
 trait PdfMakerUtilities
@@ -155,14 +156,27 @@ trait PdfMakerUtilities
 
     public function processOptions()
     {
-        if (isset($this->options['print_css']) && $this->options['print_css']) {
+        if (isset($this->options['repeat_header_and_footer']) && $this->options['repeat_header_and_footer']) {
             $this->insertPrintCSS();
+            $this->wrapIntoTable();
         }
     }
 
     public function insertPrintCSS()
     {
-        $css = '.page-header,.page-header-space{height:100px}.page-footer,.page-footer-space{height:50px}.page-footer{position:fixed;bottom:0;width:100%;border-top:1px solid #000;background:#ff0}.page-header{position:fixed;top:0;width:100%;border-bottom:1px solid #000;background:#ff0}.page{page-break-after:always}@page{margin:20mm}@media print{thead{display:table-header-group}tfoot{display:table-footer-group}button{display:none}body{margin:0}}';
+        $css = <<<EOT
+        table.page-container {
+            page-break-after: always;
+        }
+        
+        thead.page-header {
+            display: table-header-group;
+        }
+
+        tfoot.page-footer {
+            display: table-footer-group;
+        }
+        EOT;
 
         $css_node = $this->document->createTextNode($css);
 
@@ -180,4 +194,67 @@ trait PdfMakerUtilities
             return $head->appendChild($style_node);
         }
     }
+
+    public function wrapIntoTable()
+    {
+        $markup = <<<EOT
+        <table class="page-container" id="page-container">
+            <thead class="page-report">
+                <tr>
+                    <th class="page-report-cell" id="repeat-header">
+                        <!-- Repeating header goes here.. -->
+                    </th>
+                </tr>
+            </thead>
+            <tfoot class="report-footer">
+                <tr>
+                    <td class="report-footer-cell" id="repeat-footer">
+                        <!-- Repeating footer goes here -->
+                    </td>
+                </tr>
+            </tfoot>
+            <tbody class="report-content">
+                <tr>
+                    <td class="report-content-cell" id="repeat-content">
+                        <!-- Rest of the content goes here -->
+                    </td>
+                </tr>
+            </tbody>
+        </table>
+        EOT;
+
+        $document = new DOMDocument();
+        $document->loadHTML($markup);
+
+        $table = $document->getElementById('page-container');
+
+        $this->document->getElementsByTagName('body')
+            ->item(0)
+            ->appendChild($this->document->importNode($table, true));
+
+        foreach ($this->data['template'] as $element) {
+            if ($element['id'] == 'header' || $element['id'] == 'footer') {
+                continue;
+            }
+
+            $node = $this->document->getElementById($element['id']);
+            $node->parentNode->removeChild($node);
+
+            $this->document->getElementById('repeat-content')->appendChild($node);
+        }
+
+        if ($header = $this->document->getElementById('header')) {
+            $header = $this->document->getElementById('header');
+            $header->parentNode->removeChild($header);
+
+            $this->document->getElementById('repeat-header')->appendChild($header);
+        }
+
+        if ($footer = $this->document->getElementById('footer')) {
+            $footer = $this->document->getElementById('footer');
+            $footer->parentNode->removeChild($footer);
+
+            $this->document->getElementById('repeat-footer')->appendChild($footer);
+        }
+    }
 }

tests/Feature/PdfMaker/PdfMakerTest.php

@@ -361,18 +361,21 @@ class PdfMakerTest extends TestCase
     {
         $design = new ExampleDesign();
 
-        $html = $design
-            ->document()
-            ->getSectionHTML('product-table');
-
         $state = [
-            'template' => [],
+            'template' => [
+                'product-table' => [
+                    'id' => 'product-table',
+                    'elements' => [
+                        ['element' => 'p', 'content' => 'Example paragraph'],
+                    ],
+                ],
+            ],
             'variables' => [
                 'labels' => [],
                 'values' => [],
             ],
             'options' => [
-                'print_css' => true,
+                'repeat_header_and_footer' => true,
             ],
         ];
 
@@ -382,8 +385,6 @@ class PdfMakerTest extends TestCase
             ->design(ExampleDesign::class)
             ->build();
 
-        exec('echo "" > storage/logs/laravel.log');
-
         info($maker->getCompiledHTML(true));
     }
 }

tests/Feature/PdfMaker/example-design.html

@@ -2,6 +2,7 @@
 <link href="https://unpkg.com/tailwindcss@^1.0/dist/tailwind.min.css" rel="stylesheet">
 
 <body class="m-10">
-    <div id="header">$title</div>
+    <div id="header">My awesome header! $title</div>
     <table id="product-table"></table>
+    <div id="footer">My awesome footer</div>
 </body>