(preview) New table/pdf generation system

tests/Feature/PdfMaker/Business.php

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+<?php
+
+namespace Tests\Feature\PdfMaker;
+
+class Business
+{
+    public function html()
+    {
+        return file_get_contents(
+            base_path('tests/Feature/PdfMaker/business.html')
+        );
+    }
+}

tests/Feature/PdfMaker/PdfMaker.php

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+<?php
+
+namespace Tests\Feature\PdfMaker;
+
+use DOMDocument;
+
+class PdfMaker
+{
+    use PdfMakerUtilities;
+
+    protected $data;
+
+    public $design;
+
+    public $html;
+
+    public $document;
+
+    private $xpath;
+
+    public function __construct(array $data = [])
+    {
+        $this->data = $data;
+    }
+
+    public function design(string $design)
+    {
+        $this->design = new $design();
+
+        $this->initializeDomDocument();
+
+        return $this;
+    }
+
+    public function build()
+    {
+        $raw = $this->design->html();
+
+        foreach ($this->data['template'] as $element) {
+            foreach ($element['properties'] as $property => $value) {
+                $this->updateElementProperty($element['id'], $property, $value);
+            }
+        }
+
+        foreach ($this->data['variables'] as $entry) {
+            $this->updateVariable($entry['id'], $entry['variable'], $entry['value']);
+        }
+
+        return $this;
+    }
+
+    public function getCompiledHTML()
+    {
+        return $this->document->saveHTML();
+    }
+}

tests/Feature/PdfMaker/PdfMakerTest.php

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+<?php
+
+namespace Tests\Feature\PdfMaker;
+
+use Tests\TestCase;
+
+class PdfMakerTest extends TestCase
+{
+    public function testDesignLoadsCorrectly()
+    {
+        $maker = new PdfMaker();
+
+        $maker->design(Business::class);
+
+        $this->assertInstanceOf(Business::class, $maker->design);
+    }
+
+    public function testHtmlDesignLoadsCorrectly()
+    {
+        $maker = new PdfMaker();
+
+        $maker
+            ->design(Business::class)
+            ->build();
+
+        $this->assertStringContainsString('<!-- Business -->', $maker->html);
+    }
+
+    public function testGetSectionUtility()
+    {
+        $maker = new PdfMaker();
+
+        $maker
+            ->design(Business::class)
+            ->build();
+
+        $this->assertEquals('table', $maker->getSectionNode('product-table')->nodeName);
+    }
+
+    public function testTableAttributesAreInjected()
+    {
+        $state = [
+            'template' => [
+                'product-table' => [
+                    'id' => 'product-table',
+                    'properties' => [
+                        'class' => 'my-awesome-class',
+                        'style' => 'margin-top: 10px;',
+                        'script' => 'console.log(1)',
+                    ],
+                ],
+                'header' => [
+                    'id' => 'header',
+                    'properties' => [
+                        'class' => 'header-class',
+                    ],
+                ],
+            ],
+            'variables' => [],
+        ];
+
+        $maker = new PdfMaker($state);
+
+        $maker
+            ->design(Business::class)
+            ->build();
+
+        $this->assertStringContainsString('my-awesome-class', $maker->getSection('product-table', 'class'));
+        $this->assertStringContainsString('margin-top: 10px;', $maker->getSection('product-table', 'style'));
+        $this->assertStringContainsString('console.log(1)', $maker->getSection('product-table', 'script'));
+    }
+
+    public function testVariablesAreReplaced()
+    {
+        $state = [
+            'template' => [
+                'product-table' => [
+                    'id' => 'product-table',
+                    'properties' => [
+                        'class' => 'my-awesome-class',
+                        'style' => 'margin-top: 10px;',
+                        'script' => 'console.log(1)',
+                    ],
+                ],
+                'header' => [
+                    'id' => 'header',
+                    'properties' => [
+                        'class' => 'header-class',
+                    ],
+                ],
+            ],
+            'variables' => [
+                ['id' => 'header', 'variable' => '$title', 'value' => 'Invoice Ninja'],
+            ],
+        ];
+
+        $maker = new PdfMaker($state);
+
+        $maker
+            ->design(Business::class)
+            ->build();
+
+        $this->assertStringContainsString('Invoice Ninja', $maker->getCompiledHTML());
+        $this->assertStringContainsString('Invoice Ninja', $maker->getSection('header'));
+    }
+}

tests/Feature/PdfMaker/PdfMakerUtilities.php

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+<?php
+
+namespace Tests\Feature\PdfMaker;
+
+use DOMDocument;
+use DOMXPath;
+
+trait PdfMakerUtilities
+{
+    private function initializeDomDocument()
+    {
+        $document = new DOMDocument();
+
+        $document->validateOnParse = true;
+        @$document->loadHTML($this->design->html());
+        
+        $this->document = $document;
+        $this->xpath = new DOMXPath($document);
+    }
+
+    public function getSection(string $selector, string $section = null)
+    {
+        $element = $this->document->getElementById($selector);
+
+        if ($section) {
+            return $element->getAttribute($section);
+        }
+
+        return $element->nodeValue;
+    }
+
+    public function getSectionNode(string $selector)
+    {
+        return $this->document->getElementById($selector);
+    }
+
+    public function updateElementProperty(string $element, string $attribute, string $value)
+    {
+        $element = $this->document->getElementById($element);
+
+        $element->setAttribute($attribute, $value);
+
+        if ($element->getAttribute($attribute) === $value) {
+            return $element;
+        }
+
+        info('Setting element property failed.');
+
+        return $element;
+    }
+
+    public function updateVariable(string $element, string $variable, string $value)
+    {
+        $element = $this->document->getElementById($element);
+
+        $original = $element->nodeValue;
+
+        info([$variable => $value]);
+        
+        $element->nodeValue = '';
+
+        $replaced = strtr($original, [$variable => $value]);
+
+        $element->appendChild(
+            $this->document->createTextNode($replaced)
+        );
+
+        return $element;
+    }
+}

tests/Feature/PdfMaker/business.html

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+<!-- Business -->
+<div id="header">This is $title</div>
+<table id="product-table"></table>