From 16d117a5e2b43854c18cc5a607b43bcb6f2dcf27 Mon Sep 17 00:00:00 2001
From: Julian Finkler <julian@developer-heaven.de>
Date: Wed, 17 Jan 2018 20:58:12 +0100
Subject: [PATCH] Initial Commit

---
 .gitignore                  |  2 +
 README.md                   | 23 ++++++++++++
 composer.json               | 26 +++++++++++++
 phpunit.xml                 | 12 ++++++
 src/Environment.php         | 74 +++++++++++++++++++++++++++++++++++++
 tests/EnvironmentTest.php   | 17 +++++++++
 tests/autoload.php          |  3 ++
 tests/expected.html         | 11 ++++++
 tests/res/base.html.twig    |  9 +++++
 tests/res/pluginA.html.twig |  4 ++
 tests/res/pluginB.html.twig |  8 ++++
 11 files changed, 189 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 README.md
 create mode 100644 composer.json
 create mode 100644 phpunit.xml
 create mode 100644 src/Environment.php
 create mode 100644 tests/EnvironmentTest.php
 create mode 100644 tests/autoload.php
 create mode 100644 tests/expected.html
 create mode 100644 tests/res/base.html.twig
 create mode 100644 tests/res/pluginA.html.twig
 create mode 100644 tests/res/pluginB.html.twig

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..55940e5
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/vendor/
+composer.lock
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..c2fdf32
--- /dev/null
+++ b/README.md
@@ -0,0 +1,23 @@
+# Twig Compose Environment
+A **quick and dirty** solution for multiple sub templates in twig
+
+## Installation
+```bash
+$ composer require devtronic/twig-compose
+```
+
+## Usage
+
+Every sub template **must** extend from the base template 
+```php
+<?php
+$loader = new \Twig_Loader_Filesystem(''); // or whatever
+$twig = new Devtronic\TwigCompose\Environment($loader); // instead of Twig_Environment
+
+$template = $twig->compose('base.html.twig', ['pluginA.html.twig', 'pluginB.html.twig']); // Take a look in tests/res
+
+echo $template->render([
+    // Your template data
+]);
+
+```
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..b676d7d
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,26 @@
+{
+    "name": "devtronic/twig-compose",
+    "description": "Compose twig templates from multiple child templates",
+    "type": "library",
+    "require": {
+        "php": "5.6 || ^7.0",
+        "twig/twig": "1.* || 2.*"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^5.7"
+    },
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Julian Finkler",
+            "email": "julian@developer-heaven.de"
+        }
+    ],
+    "minimum-stability": "stable",
+    "autoload": {
+        "psr-4": {
+            "Devtronic\\TwigCompose\\": "src/",
+            "Devtronic\\Tests\\TwigCompose\\": "tests/"
+        }
+    }
+}
diff --git a/phpunit.xml b/phpunit.xml
new file mode 100644
index 0000000..cd8c517
--- /dev/null
+++ b/phpunit.xml
@@ -0,0 +1,12 @@
+<phpunit bootstrap="tests/autoload.php">
+    <testsuites>
+        <testsuite name="Test Suite">
+            <directory suffix="Test.php">./tests/</directory>
+        </testsuite>
+    </testsuites>
+    <filter>
+        <whitelist processUncoveredFilesFromWhitelist="true">
+            <directory suffix=".php">./src</directory>
+        </whitelist>
+    </filter>
+</phpunit>
diff --git a/src/Environment.php b/src/Environment.php
new file mode 100644
index 0000000..6d88ac3
--- /dev/null
+++ b/src/Environment.php
@@ -0,0 +1,74 @@
+<?php
+
+namespace Devtronic\TwigCompose;
+
+use Twig_Environment;
+use Twig_Loader_Array;
+
+class Environment extends Twig_Environment
+{
+    /**
+     * Compose a template with N sub templates
+     *
+     * @param string $baseTemplate The base template
+     * @param string[] $subTemplates The sub templates
+     *
+     * @return \Twig_TemplateWrapper The Template
+     *
+     * @throws \Twig_Error_Loader
+     * @throws \Twig_Error_Runtime
+     * @throws \Twig_Error_Syntax
+     */
+    public function compose($baseTemplate, $subTemplates)
+    {
+        $baseTemplatePath = $this->getExactPath($baseTemplate);
+        $templates = [$baseTemplate => file_get_contents($baseTemplatePath)];
+        foreach ($subTemplates as $template) {
+            $templates[md5($template . uniqid()) . '.html.twig'] = file_get_contents($this->getExactPath($template));
+        }
+
+        $i = 0;
+        $prevKey = null;
+        foreach ($templates as $hash => $template) {
+            if ($i < 2) {
+                $i++;
+                $prevKey = $hash;
+                continue;
+            }
+
+            if (strstr($template, $baseTemplatePath)) {
+                $template = str_replace($baseTemplatePath, $prevKey, $template);
+            }
+
+            if (strstr($template, $baseTemplate)) {
+                $template = str_replace($baseTemplate, $prevKey, $template);
+            }
+            $templates[$hash] = $template;
+            $prevKey = $hash;
+        }
+        end($templates);
+        $newTemplate = key($templates);
+
+        $loader = new Twig_Loader_Array($templates);
+        $originalLoader = $this->getLoader();
+        $this->setLoader($loader);
+        $templateWrapper = $this->load($newTemplate);
+        $this->setLoader($originalLoader);
+
+        return $templateWrapper;
+    }
+
+    /**
+     * Gets the exact template path
+     *
+     * @param string $name The template name
+     * @return string The template path
+     *
+     * @throws \Twig_Error_Loader
+     * @throws \Twig_Error_Syntax
+     */
+    private function getExactPath($name)
+    {
+        return $this->resolveTemplate($name)->getSourceContext()->getPath();
+    }
+}
diff --git a/tests/EnvironmentTest.php b/tests/EnvironmentTest.php
new file mode 100644
index 0000000..9f45965
--- /dev/null
+++ b/tests/EnvironmentTest.php
@@ -0,0 +1,17 @@
+<?php
+
+namespace Devtronic\Tests\TwigCompose;
+
+use Devtronic\TwigCompose\Environment;
+use PHPUnit\Framework\TestCase;
+
+class EnvironmentTest extends TestCase
+{
+    public function testCompose()
+    {
+        $loader = new \Twig_Loader_Filesystem(__DIR__ . '/res');
+        $twig = new Environment($loader);
+        $template = $twig->compose('base.html.twig', ['pluginA.html.twig', 'pluginB.html.twig']);
+        $this->assertSame(file_get_contents(__DIR__ . '/expected.html'), $template->render(['what' => 'World']));
+    }
+}
\ No newline at end of file
diff --git a/tests/autoload.php b/tests/autoload.php
new file mode 100644
index 0000000..c55fb89
--- /dev/null
+++ b/tests/autoload.php
@@ -0,0 +1,3 @@
+<?php
+
+require_once __DIR__ . '/../vendor/autoload.php';
\ No newline at end of file
diff --git a/tests/expected.html b/tests/expected.html
new file mode 100644
index 0000000..0d9ef33
--- /dev/null
+++ b/tests/expected.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+    <head>
+                <title>Great title</title>
+
+    <meta charset="UTF-8">
+    </head>
+    <body>
+            <h1>Hello World</h1>
+    </body>
+</html>
\ No newline at end of file
diff --git a/tests/res/base.html.twig b/tests/res/base.html.twig
new file mode 100644
index 0000000..da8e521
--- /dev/null
+++ b/tests/res/base.html.twig
@@ -0,0 +1,9 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        {% block head '' %}
+    </head>
+    <body>
+        {% block body '' %}
+    </body>
+</html>
\ No newline at end of file
diff --git a/tests/res/pluginA.html.twig b/tests/res/pluginA.html.twig
new file mode 100644
index 0000000..3791784
--- /dev/null
+++ b/tests/res/pluginA.html.twig
@@ -0,0 +1,4 @@
+{% extends 'base.html.twig' %}
+{% block head %}
+    {{ parent() }}<title>Great title</title>
+{% endblock %}
\ No newline at end of file
diff --git a/tests/res/pluginB.html.twig b/tests/res/pluginB.html.twig
new file mode 100644
index 0000000..5b8d2db
--- /dev/null
+++ b/tests/res/pluginB.html.twig
@@ -0,0 +1,8 @@
+{% extends 'base.html.twig' %}
+{% block head %}
+    {{ parent() }}
+    <meta charset="UTF-8">
+{% endblock %}
+{% block body %}
+    <h1>Hello {{ what }}</h1>
+{% endblock %}
\ No newline at end of file