Initial commitv1.0.0

10 files changed, 877 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+/vendor/
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..4b66fcb
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc., <http://fsf.org/>
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
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+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
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+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
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+associated interface definition files, plus the scripts used to
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+If distribution of executable or object code is made by offering
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+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    {description}
+    Copyright (C) 2020  Daniel Weipert
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  {signature of Ty Coon}, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.
diff --git a/Readme.md b/Readme.md
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+++ b/Readme.md
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+## Features
+
+- adds a metabox to configurable Post-Types to create and edit Twig templates
+- adds Twig support to the WP Theme & Plugin editors
+  - you can even customize the CodeMirror theme
+
+## Plugin Dependencies
+
+- https://wordpress.org/plugins/timber-library/
+- https://wordpress.org/plugins/classic-editor/
+
+## How to use the MetaBox Feature
+
+The plugin uses the path defined in `Timber::$locations` as the templates path or falls back to the uploads folder if none is provided.
+
+Either adjust your `Timber::render('page.twig', $context)`-functions like this:
+```
+$filenames = [TimberEditor::getTemplateFilename(), 'page.twig'];
+Timber::render($filenames, $context);
+```
+
+like this
+```
+TimberEditor::render('page.twig', $context);
+# 'page.twig' serves as a fallback if the current posts's template doesn't exist
+```
+
+or like this
+```
+TimberEditor::renderPost('page.twig', $context);
+# renderPost() automatically adds ['post' => new Timber\Post()] to the $context
+```
+
+## License
+
+(GPL v2)[LICENSE]
diff --git a/composer.json b/composer.json
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+++ b/composer.json
@@ -0,0 +1,19 @@
+{
+    "name": "dweipert/timber-editor",
+    "version": "1.0.0",
+    "type": "wordpress-plugin",
+    "authors": [
+        {
+            "name": "Daniel Weipert",
+            "email": "code@drogueronin.de"
+        }
+    ],
+    "require": {
+        "php": ">=7.4"
+    },
+    "autoload": {
+        "psr-4": {
+            "TimberEditor\\": "src/"
+        }
+    }
+}
diff --git a/src/MetaBox.php b/src/MetaBox.php
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--- /dev/null
+++ b/src/MetaBox.php
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+<?php
+
+namespace TimberEditor;
+
+class MetaBox
+{
+    /**
+     * Metabox constructor.
+     */
+    public function __construct()
+    {
+        add_action('add_meta_boxes', [$this, 'addMetaBoxes']);
+
+        foreach (Settings::getGeneralSupportedPostTypes() as $postType) {
+            add_action("save_post_{$postType}", [$this, 'savePost']);
+        }
+    }
+
+    /**
+     * add_meta_boxes action callback
+     *
+     * @param $postType
+     */
+    public function addMetaBoxes($postType)
+    {
+        if (! in_array($postType, Settings::getGeneralSupportedPostTypes())) {
+            return;
+        }
+
+        add_meta_box('timber-editor', 'Timber Editor', [$this, 'metaBoxTimberEditor'], '', 'advanced', 'high');
+    }
+
+    /**
+     * save_post action callback
+     * Writes the content to file
+     *
+     * @param $postId
+     */
+    public function savePost($postId)
+    {
+        if (
+            (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) ||
+            (! isset($_POST['post_ID']) || $_POST['post_ID'] != $postId) ||
+            ! check_admin_referer('metaBoxTimberEditor', 'metaBoxTimberEditor') ||
+            ! isset($_POST['timber-editor_content'])
+        ) {
+            return;
+        }
+
+        file_put_contents(TimberEditor::getTemplateFilePath($postId), $_POST['timber-editor_content']);
+        if (empty($_POST['timber-editor_content'])) {
+            wp_delete_file(TimberEditor::getTemplateFilePath($postId));
+        }
+    }
+
+    /**
+     * add_meta_box callback
+     */
+    public function metaBoxTimberEditor()
+    {
+        $file = TimberEditor::getTemplateFilePath();
+        if (file_exists($file)) {
+            $f = fopen($file, 'r');
+            $content = fread($f, filesize($file));
+            fclose($f);
+        }
+
+        wp_nonce_field('metaBoxTimberEditor', 'metaBoxTimberEditor');
+        ?>
+        <textarea name="timber-editor_content" id="timber-editor_content"><?= esc_textarea($content ?? '') ?></textarea>
+        <?php
+
+        $settings = wp_enqueue_code_editor([
+            'file' => $file,
+            'codemirror' => [
+                'theme' => Settings::getCodeMirrorTheme(),
+            ],
+        ]);
+        wp_add_inline_script('code-editor', sprintf('jQuery( function() { wp.codeEditor.initialize( "timber-editor_content", %s ); } );', wp_json_encode($settings)));
+    }
+}
diff --git a/src/Settings.php b/src/Settings.php
new file mode 100644
index 0000000..d9947f8
--- /dev/null
+++ b/src/Settings.php
@@ -0,0 +1,97 @@
+<?php
+
+namespace TimberEditor;
+
+class Settings
+{
+    /**
+     * Settings constructor.
+     */
+    public function __construct()
+    {
+        add_action('admin_menu', [$this, 'adminMenu']);
+        add_action('admin_init', [$this, 'adminInit']);
+    }
+
+    /**
+     * admin_menu action callback
+     */
+    public function adminMenu()
+    {
+        add_submenu_page('options-general.php', 'Timber Editor', 'Timber Editor', 'manage_options', 'timber-editor', [$this, 'addSubmenuPage']);
+    }
+
+    /**
+     * add_submenu_page callback
+     */
+    public function addSubmenuPage()
+    {
+        ?>
+        <div class="wrap">
+            <h1><?= esc_html(get_admin_page_title()) ?></h1>
+            <form action="options.php" method="post">
+                <?php
+                settings_fields('timber-editor');
+                do_settings_sections('timber-editor');
+                submit_button();
+                ?>
+            </form>
+        </div>
+        <?php
+    }
+
+    /**
+     * admin_init action callback
+     */
+    public function adminInit()
+    {
+        register_setting('timber-editor', 'timber-editor_general_supported-post-types');
+        add_settings_section('timber-editor_general', __('General'), function () {}, 'timber-editor');
+        add_settings_field('timber-editor_general_supported-post-types', __('Supported Post Types'), function () {
+            $postTypes = get_post_types([], 'objects');
+            $supportedPostTypes = self::getGeneralSupportedPostTypes();
+            ?>
+            <select name="timber-editor_general_supported-post-types[]" id="timber-editor_general_supported-post-types" multiple>
+                <?php foreach ($postTypes as $pt): ?>
+                    <option value="<?= $pt->name ?>" <?= in_array($pt->name, $supportedPostTypes) ? 'selected' : '' ?>><?= $pt->label ?></option>
+                <?php endforeach; ?>
+            </select>
+            <?php
+        }, 'timber-editor', 'timber-editor_general', ['label_for' => 'timber-editor_general_supported-post-types']);
+
+        register_setting('timber-editor', 'timber-editor_codemirror_theme');
+        add_settings_section('timber-editor_codemirror', 'CodeMirror', function () {}, 'timber-editor');
+        add_settings_field('timber-editor_codemirror_theme', 'Theme', function () {
+            $theme = self::getCodeMirrorTheme();
+            $themes = include_once 'codemirror-themes.php';
+            ?>
+            <select name="timber-editor_codemirror_theme" id="timber-editor_codemirror_theme">
+                <?php foreach ($themes as $t): ?>
+                    <option value="<?= $t ?>" <?php selected($theme, $t) ?>><?= $t ?></option>
+                <?php endforeach; ?>
+            </select>
+            <p class="description">
+                <a href="https://codemirror.net/demo/theme.html#<?= $theme ?>" target="_blank">
+                    <?= __('Preview') ?>
+                </a>
+            </p>
+            <?php
+        }, 'timber-editor', 'timber-editor_codemirror', ['label_for' => 'timber-editor_codemirror_theme']);
+    }
+
+    /**
+     * @return string[]
+     */
+    public static function getGeneralSupportedPostTypes()
+    {
+        return get_option('timber-editor_general_supported-post-types', ['page']) ?: [];
+    }
+
+    /**
+     * @return string
+     */
+    public static function getCodeMirrorTheme()
+    {
+        return get_option('timber-editor_codemirror_theme', 'default');
+    }
+}
diff --git a/src/ThemeEditor.php b/src/ThemeEditor.php
new file mode 100644
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--- /dev/null
+++ b/src/ThemeEditor.php
@@ -0,0 +1,73 @@
+<?php
+
+namespace TimberEditor;
+
+class ThemeEditor
+{
+    /**
+     * ThemeEditor constructor.
+     */
+    public function __construct()
+    {
+        add_filter('wp_theme_editor_filetypes', [$this, 'editableExtensions']);
+        add_filter('editable_extensions', [$this, 'editableExtensions']);
+        add_filter('wp_code_editor_settings', [$this, 'codeEditorSettings'], 10, 2);
+        add_action('wp_enqueue_code_editor', [$this, 'enqueueCodeEditor']);
+    }
+
+    /**
+     * wp_theme_editor_filetypes and editable_extensions filter callback
+     * Adds twig extension support
+     *
+     * @param $types
+     *
+     * @return array
+     */
+    public function editableExtensions($types)
+    {
+        $types[] = 'twig';
+
+        return $types;
+    }
+
+    /**
+     * wp_code_editor_settings filter callback
+     * Adds twig support and sets theme
+     *
+     * @param $settings
+     * @param $args
+     *
+     * @return array
+     */
+    public function codeEditorSettings($settings, $args) {
+        if (strpos($args['file'], '.twig') !== false) {
+            $settings['codemirror']['mode'] = ['name' => 'twig', 'base' => 'text/html'];
+        }
+
+        $settings['codemirror']['theme'] = Settings::getCodeMirrorTheme();
+
+        return $settings;
+    }
+
+    /**
+     * wp_enqueue_code_editor action callback
+     * Adds twig and custom mode support
+     * Adds selected theme css
+     *
+     * @param $settings
+     */
+    public function enqueueCodeEditor($settings) {
+        if (isset($settings['codemirror']['mode']['name']) && $settings['codemirror']['mode']['name'] == 'twig') {
+            wp_add_inline_script( # fix as described here: https://make.wordpress.org/core/2017/10/22/code-editing-improvements-in-wordpress-4-9/
+                'wp-codemirror',
+                'window.CodeMirror = wp.CodeMirror;'
+            );
+            wp_enqueue_script('mode-twig', 'https://unpkg.com/codemirror@5/mode/twig/twig.js', ['wp-codemirror']);
+        }
+
+        $theme = $settings['codemirror']['theme'];
+        if ($theme != 'default') {
+            wp_enqueue_style('codemirror-theme', "https://unpkg.com/codemirror@5/theme/$theme.css", ['wp-codemirror']);
+        }
+    }
+}
diff --git a/src/TimberEditor.php b/src/TimberEditor.php
new file mode 100644
index 0000000..2eb3b36
--- /dev/null
+++ b/src/TimberEditor.php
@@ -0,0 +1,148 @@
+<?php
+
+namespace TimberEditor;
+
+use Timber\Loader;
+use Timber\Post;
+use Timber\Timber;
+
+class TimberEditor
+{
+    /**
+     * TimberEditor constructor.
+     */
+    public function __construct()
+    {
+        if (! class_exists(Timber::class)) {
+            add_action('admin_notices', [$this, 'adminNoticeTimberLibraryMissing']);
+            return;
+        }
+        if (! class_exists(\Classic_Editor::class)) {
+            add_action('admin_notices', [$this, 'adminNoticeClassicEditor']);
+        }
+
+        $this->run();
+    }
+
+    /**
+     * admin_notices action callback for missing Timber Library
+     */
+    public function adminNoticeTimberLibraryMissing()
+    {
+        ?>
+        <div class="notice notice-error">
+            <p>
+                <a href="https://wordpress.org/plugins/timber-library/" target="_blank">Timber</a>
+                (<a href="http://word.press/wp-admin/plugin-install.php?s=timber&tab=search&type=term">install</a>)
+                needs to be installed and active.
+            </p>
+        </div>
+        <?php
+    }
+
+    /**
+     * admin_notices action callback for missing Classic Editor
+     */
+    public function adminNoticeClassicEditor()
+    {
+        ?>
+        <div class="notice notice-warning is-dismissible">
+            <p>
+                <a href="https://wordpress.org/plugins/classic-editor/" target="_blank">Classic Editor</a>
+                (<a href="http://word.press/wp-admin/plugin-install.php?s=classic+editor&tab=search&type=term">install</a>)
+                should be installed and active, because the <b>Gutenberg Editor</b> doesn't play well with <b>CodeMirror</b> <i>currently</i>.
+            </p>
+        </div>
+        <?php
+    }
+
+    /**
+     * Run the plugin
+     */
+    public function run()
+    {
+        if (is_null(Timber::$locations)) {
+            Timber::$locations = self::getTemplatesLocation();
+        }
+
+        new Settings();
+        new ThemeEditor();
+        new MetaBox();
+    }
+
+    /**
+     * Get the plugins' templates location
+     * try to use user provided location via Timber::$locations
+     * or fall back to uploads folder
+     *
+     * @return string
+     */
+    public static function getTemplatesLocation()
+    {
+        $location = Timber::$locations;
+        if (is_array($location)) {
+            $location = $location[array_key_first($location)];
+        } else if (is_null($location)) {
+            $location = wp_upload_dir()['basedir'] . '/timber-editor';
+        }
+
+        return apply_filters('TimberEditor/getTemplatesLocation', $location);
+    }
+
+    /**
+     * Get the current posts' template filename
+     *
+     * @param int|null $postId
+     *
+     * @return string
+     */
+    public static function getTemplateFilename($postId = null)
+    {
+        return apply_filters('TimberEditor/getTemplateFilename', ($postId ?? get_the_ID()) . '.twig', $postId);
+    }
+
+    /**
+     * Get the current posts' template filepath
+     *
+     * @param int|null $postId
+     *
+     * @return string
+     */
+    public static function getTemplateFilePath($postId = null)
+    {
+        return self::getTemplatesLocation() . '/' . self::getTemplateFilename($postId);
+    }
+
+    /**
+     * @param array|string $filenames
+     * @param array        $context
+     * @param bool         $expires
+     * @param string       $cacheMode
+     *
+     * @return bool|string
+     */
+    public static function render($filenames = [], $context = [], $expires = false, $cacheMode = Loader::CACHE_USE_DEFAULT)
+    {
+        $filenames = (array)$filenames;
+        array_unshift($filenames, self::getTemplateFilename());
+
+        return Timber::render($filenames, $context, $expires, $cacheMode);
+    }
+
+    /**
+     * @param array|string $filenames
+     * @param array        $context
+     * @param bool         $expires
+     * @param string       $cacheMode
+     *
+     * @return bool|string
+     */
+    public static function renderPost($filenames = [], $context = [], $expires = false, $cacheMode = Loader::CACHE_USE_DEFAULT)
+    {
+        if (! isset($context['post'])) {
+            $context['post'] = new Post();
+        }
+
+        return self::render($filenames, $context, $expires, $cacheMode);
+    }
+}
diff --git a/src/codemirror-themes.php b/src/codemirror-themes.php
new file mode 100644
index 0000000..a51779d
--- /dev/null
+++ b/src/codemirror-themes.php
@@ -0,0 +1,67 @@
+<?php
+
+return [
+    'default',
+    '3024-day',
+    '3024-night',
+    'abcdef',
+    'ambiance',
+    'ayu-dark',
+    'ayu-mirage',
+    'base16-dark',
+    'base16-light',
+    'bespin',
+    'blackboard',
+    'cobalt',
+    'colorforth',
+    'darcula',
+    'dracula',
+    'duotone-dark',
+    'duotone-light',
+    'eclipse',
+    'elegant',
+    'erlang-dark',
+    'gruvbox-dark',
+    'hopscotch',
+    'icecoder',
+    'idea',
+    'isotope',
+    'lesser-dark',
+    'liquibyte',
+    'lucario',
+    'material',
+    'material-darker',
+    'material-palenight',
+    'material-ocean',
+    'mbo',
+    'mdn-like',
+    'midnight',
+    'monokai',
+    'moxer',
+    'neat',
+    'neo',
+    'night',
+    'nord',
+    'oceanic-next',
+    'panda-syntax',
+    'paraiso-dark',
+    'paraiso-light',
+    'pastel-on-dark',
+    'railscasts',
+    'rubyblue',
+    'seti',
+    'shadowfox',
+    'solarized dark',
+    'solarized light',
+    'the-matrix',
+    'tomorrow-night-bright',
+    'tomorrow-night-eighties',
+    'ttcn',
+    'twilight',
+    'vibrant-ink',
+    'xq-dark',
+    'xq-light',
+    'yeti',
+    'yonce',
+    'zenburn',
+];
diff --git a/timber-editor.php b/timber-editor.php
new file mode 100644
index 0000000..10b6007
--- /dev/null
+++ b/timber-editor.php
@@ -0,0 +1,16 @@
+<?php
+/**
+ * Plugin Name: Timber Editor
+ * Description: Admin Editor for Timber
+ * Plugin URI: https://gitlab.com/DRogueRonin/wp-plugin-timber-editor
+ * Author: Daniel Weipert
+ * Version: 1.0.0
+ * Author URI: https://dweipert.de
+*/
+
+require 'vendor/autoload.php';
+
+add_action('plugins_loaded', 'timberEditor');
+function timberEditor() {
+    new \TimberEditor\TimberEditor();
+}