1. Getting Started
      1. Video Quick-Start Series
      2. Server Requirements
        1. MySQL 5.0.51 Issues
      3. Installation
        1. Basic Installation
          1. MODx Revolution on Debian
          2. Problems with WAMPServer 2.0i
          3. Lighttpd Guide
          4. Installation on a server running ModSecurity
          5. MODX and Suhosin
          6. Nginx Server Config
        2. Successful Installation, Now What Do I Do?
        3. Successful Installation, Now What Do I Do?
        4. Advanced Installation
        5. Git Installation
        6. Command Line Installation
          1. The Setup Config Xml File
        7. Troubleshooting Installation
        8. Using MODx Revolution from SVN
      4. An Overview of MODX
        1. Glossary of Revolution Terms
          1. Explanation of Directory Structure
        2. Roadmap
        3. MODX Revolution Framework Structure Ideology
        4. What's New in 2.3
    2. FAQs & Troubleshooting
      1. CMP Development FAQs & Troubleshooting
    3. Making Sites with MODx
      1. Structuring Your Site
        1. Resources
          1. Content Types
          2. Named Anchor
          3. Static Resource
          4. Symlink
            1. Using Resource Symlinks
          5. Weblink
        2. Templates
        3. Chunks
        4. Using Snippets
      2. Tag Syntax
      3. Customizing Content
        1. Template Variables
          1. Creating a Template Variable
          2. Adding a Custom TV Type - MODX 2.2
          3. Bindings
            1. CHUNK Binding
            2. DIRECTORY Binding
            3. EVAL Binding
            4. FILE Binding
            5. INHERIT Binding
            6. RESOURCE Binding
            7. SELECT Binding
          4. Template Variable Input Types
          5. Template Variable Output Types
            1. Date TV Output Type
            2. Delimiter TV Output Type
            3. HTML Tag TV Output Type
            4. Image TV Output Type
            5. URL TV Output Type
          6. Adding a Custom TV Input Type
          7. Adding a Custom TV Output Type
          8. Creating a multi-select box for related pages in your template
          9. Accessing Template Variable Values via the API
        2. Properties and Property Sets
        3. Input and Output Filters (Output Modifiers)
          1. Custom Output Filter Examples
      4. Commonly Used Template Tags
        1. Date Formats
    4. Administering Your Site
      1. Settings
        1. System Settings
          1. access_category_enabled
          2. date_timezone
          3. access_context_enabled
          4. access_resource_group_enabled
          5. allow_duplicate_alias
          6. allow_forward_across_contexts
          7. allow_multiple_emails
          8. allow_tags_in_post
          9. archive_with
          10. automatic_alias
          11. auto_check_pkg_updates
          12. auto_check_pkg_updates_cache_expire
          13. auto_menuindex
          14. base_help_url
          15. blocked_minutes
          16. cache_action_map
          17. cache_context_settings
          18. cache_db
          19. cache_db_expires
          20. cache_db_session
          21. cache_default
          22. cache_disabled
          23. cache_format
          24. cache_handler
          25. cache_json
          26. cache_json_expires
          27. cache_lang_js
          28. cache_lexicon_topics
          29. cache_noncore_lexicon_topics
          30. cache_resource
          31. cache_resource_expires
          32. cache_scripts
          33. cache_system_settings
          34. clear_cache_refresh_trees
          35. compress_css
          36. compress_js
          37. concat_js
          38. container_suffix
          39. cultureKey
          40. custom_resource_classes
          41. default_per_page
          42. default_template
          43. editor_css_path
          44. editor_css_selectors
          45. emailsender
          46. emailsubject
          47. enable_dragdrop
          48. error_page
          49. extension_packages
          50. failed_login_attempts
          51. feed_modx_news
          52. feed_modx_news_enabled
          53. feed_modx_security
          54. feed_modx_security_enabled
          55. fe_editor_lang
          56. filemanager_path
          57. filemanager_path_relative
          58. filemanager_url
          59. filemanager_url_relative
          60. forgot_login_email
          61. friendly_alias_lowercase_only
          62. forward_merge_excludes
          63. friendly_alias_max_length
          64. friendly_alias_restrict_chars
          65. friendly_alias_restrict_chars_pattern
          66. friendly_alias_strip_element_tags
          67. friendly_alias_translit
          68. friendly_alias_translit_class
          69. friendly_alias_translit_class_path
          70. friendly_alias_trim_chars
          71. friendly_alias_urls
          72. friendly_alias_word_delimiter
          73. friendly_alias_word_delimiters
          74. friendly_urls
          75. friendly_url_prefix
          76. friendly_url_suffix
          77. global_duplicate_uri_check
          78. hidemenu_default
          79. link_tag_scheme
          80. mail_charset
          81. mail_encoding
          82. mail_smtp_auth
          83. mail_smtp_helo
          84. mail_smtp_hosts
          85. mail_smtp_keepalive
          86. mail_smtp_pass
          87. mail_smtp_port
          88. mail_smtp_prefix
          89. mail_smtp_single_to
          90. mail_smtp_timeout
          91. mail_smtp_user
          92. mail_use_smtp
          93. manager_date_format
          94. manager_direction
          95. manager_favicon_url
          96. manager_language
          97. manager_lang_attribute
          98. manager_theme
          99. manager_time_format
          100. context_tree_sort
          101. context_tree_sortby
          102. context_tree_sortdir
          103. session_enabled
          104. upload_files
          105. modx_charset
          106. new_file_permissions
          107. new_folder_permissions
          108. password_generated_length
          109. password_min_length
          110. phpthumb_allow_src_above_docroot
          111. phpthumb_cache_maxage
          112. phpthumb_cache_maxfiles
          113. phpthumb_cache_maxsize
          114. phpthumb_cache_source_enabled
          115. phpthumb_document_root
          116. phpthumb_error_bgcolor
          117. phpthumb_error_fontsize
          118. phpthumb_error_textcolor
          119. phpthumb_far
          120. phpthumb_imagemagick_path
          121. phpthumb_nohotlink_enabled
          122. phpthumb_nohotlink_erase_image
          123. phpthumb_nohotlink_text_message
          124. phpthumb_nohotlink_valid_domains
          125. phpthumb_nooffsitelink_enabled
          126. phpthumb_nooffsitelink_erase_image
          127. phpthumb_nooffsitelink_require_refer
          128. phpthumb_nooffsitelink_text_message
          129. phpthumb_nooffsitelink_valid_domains
          130. phpthumb_nooffsitelink_watermark_src
          131. phpthumb_zoomcrop
          132. principal_targets
          133. proxy_auth_type
          134. proxy_host
          135. proxy_password
          136. proxy_port
          137. proxy_username
          138. publish_default
          139. rb_base_dir
          140. rb_base_url
          141. request_controller
          142. request_param_alias
          143. request_param_id
          144. resource_tree_node_name
          145. resource_tree_node_tooltip
          146. richtext_default
          147. search_default
          148. server_offset_time
          149. server_protocol
          150. session_cookie_domain
          151. session_cookie_lifetime
          152. session_cookie_path
          153. session_cookie_secure
          154. session_handler_class
          155. session_name
          156. settings_version
          157. signupemail_message
          158. site_name
          159. site_start
          160. site_status
          161. site_unavailable_message
          162. site_unavailable_page
          163. strip_image_paths
          164. symlink_merge_fields
          165. tree_default_sort
          166. tree_root_id
          167. tvs_below_content
          168. udperms_allowroot
          169. ui_debug_mode
          170. unauthorized_page
          171. upload_maxsize
          172. use_alias_path
          173. use_browser
          174. use_editor
          175. use_multibyte
          176. welcome_screen
          177. which_editor
          178. which_element_editor
          179. xhtml_urls
      2. Using Friendly URLs
      3. Contexts
        1. Creating a Subdomain from a Folder using Virtual Hosts
        2. Using One Gateway Plugin to Manage Multiple Domains
      4. Customizing the Manager
        1. Customizing the Manager via Plugins
        2. Form Customization Profiles
        3. Form Customization Sets
          1. Customizing Tabs via Form Customization
          2. MODX GitHub Contributor's Guide
        4. Manager Templates and Themes
      5. MODX GitHub Integrator's Guide
      6. Security
        1. Hardening MODX Revolution
        2. Policies
          1. ACLs
          2. Permissions
            1. Permissions - Administrator Policy
            2. Permissions - Resource Policy
          3. PolicyTemplates
        3. Resource Groups
        4. Roles
        5. Security Standards
        6. Security Tutorials
          1. More on the Anonymous User Group
          2. Creating a Second Super Admin User
          3. Giving a User Manager Access
          4. Making Member-Only Pages
          5. Restricting an Element from Users
        7. Troubleshooting Security
          1. Resetting a User Password Manually
        8. User Groups
        9. Users
      7. Installing a Package
        1. Troubleshooting Package Management
      8. Upgrading MODX
        1. Upgrading to Revolution 2.0.5
        2. Upgrading from 2.0.x to 2.1.x
        3. Upgrading from Versions Earlier than 2.0.5
        4. Upgrading to 2.2.x
        5. Upgrading to Revolution 2.0.0-rc-2
        6. Troubleshooting Upgrades
        7. Upgrading from MODx Evolution
          1. Functional Changes from Evolution
      9. Moving Your Site to a New Server, or to Root from Subfolder
      10. Media Sources
        1. Adding a Media Source
        2. Assigning Media Sources to TVs
        3. Media Source Types
          1. Media Source Type - File System
          2. Media Source Type - S3
        4. Securing a Media Source
          1. Creating a Media Source for Clients Tutorial
      11. Dashboards
        1. Assigning a Dashboard to a User Group
        2. Creating a Dashboard Widget
        3. Dashboard Widget Types
          1. Dashboard Widget Type - File
          2. Dashboard Widget Type - HTML
          3. Dashboard Widget Type - Inline PHP
          4. Dashboard Widget Type - Snippet
        4. Managing Your Dashboard
    5. Developing in MODx
      1. Code Standards
      2. Overview of MODx Development
        1. Developer Introduction
          1. Getting Started Developing
        2. Extras Directories
        3. Setting up a Development Environment
      3. Basic Development
        1. Static Elements
        2. Plugins
          1. System Events
            1. OnMODXInit
            2. OnFileManagerBeforeUpload
            3. OnFileManagerDirCreate
            4. OnFileManagerDirRemove
            5. OnFileManagerDirRename
            6. OnFileManagerFileCreate
            7. OnFileManagerFileRemove
            8. OnFileManagerFileRename
            9. OnFileManagerFileUpdate
            10. OnBeforeCacheUpdate
            11. OnBeforeChunkFormDelete
            12. OnBeforeChunkFormSave
            13. OnBeforeDocFormDelete
            14. OnBeforeDocFormSave
            15. OnBeforeEmptyTrash
            16. OnBeforeManagerLogin
            17. OnBeforeManagerLogout
            18. OnBeforeManagerPageInit
            19. OnBeforePluginFormDelete
            20. OnBeforePluginFormSave
            21. OnBeforeSaveWebPageCache
            22. OnBeforeSnipFormDelete
            23. OnBeforeSnipFormSave
            24. OnBeforeTempFormDelete
            25. OnBeforeTempFormSave
            26. OnBeforeTVFormDelete
            27. OnBeforeTVFormSave
            28. OnBeforeUserActivate
            29. OnBeforeUserFormDelete
            30. OnBeforeUserFormSave
            31. OnBeforeWebLogin
            32. OnBeforeWebLogout
            33. OnCacheUpdate
            34. OnCategoryBeforeRemove
            35. OnCategoryBeforeSave
            36. OnCategoryRemove
            37. OnCategorySave
            38. OnChunkBeforeRemove
            39. OnChunkBeforeSave
            40. OnChunkFormDelete
            41. OnChunkFormPrerender
            42. OnChunkFormRender
            43. OnChunkFormSave
            44. OnChunkRemove
            45. OnChunkSave
            46. OnContextBeforeRemove
            47. OnContextBeforeSave
            48. OnContextFormPrerender
            49. OnContextFormRender
            50. OnContextRemove
            51. OnContextSave
            52. OnDocFormDelete
            53. OnDocFormPrerender
            54. OnDocFormRender
            55. OnDocFormSave
            56. OnDocPublished
            57. OnDocUnPublished
            58. OnEmptyTrash
            59. OnFileManagerUpload
            60. OnHandleRequest
            61. OnInitCulture
            62. OnLoadWebDocument
            63. OnLoadWebPageCache
            64. OnManagerAuthentication
            65. OnManagerLogin
            66. OnManagerLoginFormPrerender
            67. OnManagerLoginFormRender
            68. OnManagerLogout
            69. OnManagerPageAfterRender
            70. OnManagerPageBeforeRender
            71. OnManagerPageInit
            72. OnPageNotFound
            73. OnPageUnauthorized
            74. OnParseDocument
            75. OnPluginBeforeRemove
            76. OnPluginBeforeSave
            77. OnPluginEventRemove
            78. OnPluginFormDelete
            79. OnPluginFormPrerender
            80. OnPluginFormRender
            81. OnPluginFormSave
            82. OnPluginRemove
            83. OnPluginSave
            84. OnPropertySetBeforeRemove
            85. OnPropertySetBeforeSave
            86. OnPropertySetRemove
            87. OnPropertySetSave
            88. OnResourceGroupBeforeRemove
            89. OnResourceGroupBeforeSave
            90. OnResourceGroupRemove
            91. OnResourceGroupSave
            92. OnRichTextBrowserInit
            93. OnRichTextEditorInit
            94. OnRichTextEditorRegister
            95. OnSiteRefresh
            96. OnSiteSettingsRender
            97. OnTemplateVarBeforeRemove
            98. OnTemplateVarBeforeSave
            99. OnTemplateVarRemove
            100. OnTemplateVarSave
            101. OnUserActivate
            102. OnUserBeforeRemove
            103. OnUserBeforeSave
            104. OnUserChangePassword
            105. OnUserFormDelete
            106. OnUserFormSave
            107. OnUserNotFound
            108. OnUserRemove
            109. OnUserSave
            110. OnWebAuthentication
            111. OnWebLogin
            112. OnWebLogout
            113. OnWebPageComplete
            114. OnWebPageInit
            115. OnWebPagePrerender
        3. Snippets
          1. Adding CSS and JS to Your Pages Through Snippets
          2. How to Write a Good Chunk
          3. How to Write a Good Snippet
          4. Templating Your Snippets
        4. xPDO
      4. Advanced Development
        1. Caching
          1. Setting up Memcache in MODX
        2. Custom Manager Pages
          1. Custom Manager Pages in 2.3
          2. Actions and Menus
            1. Action List
          3. Custom Manager Pages Tutorial
          4. MODExt
            1. MODx.combo.ComboBox
            2. MODx.Console
            3. MODx.FormPanel
            4. MODx.grid.Grid
            5. MODx.grid.LocalGrid
            6. MODx.msg
            7. MODx.tree.Tree
            8. MODx.Window
            9. MODExt Tutorials
              1. 1. Ext JS Tutorial - Message Boxes
              2. 2. Ext JS Tutorial - Ajax Include
              3. 3. Ext JS Tutorial - Animation
              4. 4. Ext JS Tutorial - Manipulating Nodes
              5. 5. Ext JS Tutorial - Panels
              6. 7. Ext JS Tutoral - Advanced Grid
              7. 8. Ext JS Tutorial - Inside a CMP
            10. MODExt MODx Object
        3. Custom Resource Classes
          1. Creating a Resource Class
            1. Creating a Resource Class - Step 2
            2. Creating a Resource Class - Step 3
            3. Creating a Resource Class - Step 4
        4. Extending modUser
        5. From the Command Line (CLI)
        6. Internationalization
          1. Adding a Translation
        7. MODx Services
          1. modFileHandler
          2. modMail
          3. modRegistry
        8. Namespaces
        9. Package Management
          1. Package Dependencies
          2. Creating a 3rd Party Component Build Script
          3. Providers
          4. Transport Packages
        10. Using runProcessor
        11. Validating Requests: Tokens and Nonces
        12. Developing RESTful APIs
      5. Other Development Resources
        1. Summary of Legacy Code Removed in 2.1
        2. API Reference
        3. Class Reference
          1. modResource
            1. modResource.isMember
          2. modChunk
            1. modChunk.getContent
            2. modChunk.setContent
          3. modUser
            1. modUser.addSessionContext
            2. modUser.changePassword
            3. modUser.endSession
            4. modUser.getSessionContexts
            5. modUser.getSettings
            6. modUser.hasSessionContext
            7. modUser.isAuthenticated
            8. modUser.isMember
            9. modUser.loadAttributes
            10. modUser.removeSessionContext
            11. modUser.removeSessionContextVars
            12. modUser.removeSessionCookie
          4. modX
            1. modX.addEventListener
            2. modX.checkForLocks
            3. modX.checkSession
            4. modX.executeProcessor
            5. modX.getAuthenticatedUser
            6. modX.getCacheManager
            7. modX.getChildIds
            8. modX.getChunk
            9. modX.getConfig
            10. modX.getContext
            11. modX.getEventMap
            12. modX.getLoginUserID
            13. modX.getLoginUserName
            14. modX.getParentIds
            15. modX.getParser
            16. modX.getPlaceholder
            17. modX.getRegisteredClientScripts
            18. modX.getRegisteredClientStartupScripts
            19. modX.getRequest
            20. modX.getResponse
            21. modX.getService
            22. modX.getSessionState
            23. modX.getTree
            24. modX.getUser
            25. modX.getVersionData
            26. modX.handleRequest
            27. modX.hasPermission
            28. modX.initialize
            29. modX.invokeEvent
            30. modX.lexicon
            31. modX.makeUrl
            32. modX.parseChunk
            33. modX.regClientCSS
            34. modX.regClientHTMLBlock
            35. modX.regClientScript
            36. modX.regClientStartupHTMLBlock
            37. modX.regClientStartupScript
            38. modX.reloadConfig
            39. modX.removeAllEventListener
            40. modX.removeEventListener
            41. modX.runProcessor
            42. modX.runSnippet
            43. modX.sendError
            44. modX.sendErrorPage
            45. modX.sendForward
            46. modX.sendRedirect
            47. modX.sendUnauthorizedPage
            48. modX.setDebug
            49. modX.setPlaceholder
            50. modX.setPlaceholders
            51. modX.switchContext
            52. modX.toPlaceholder
            53. modX.toPlaceholders
            54. modX.unsetPlaceholder
            55. modX.unsetPlaceholders
        4. Loading MODx Externally
        5. Reserved Parameters
    6. Case Studies and Tutorials
      1. Developing an Extra in MODX Revolution
        1. Developing an Extra in MODX Revolution, Part II
        2. Developing an Extra in MODX Revolution, Part III
      2. Developing an Extra in MODX Revolution - MODX 2.1 and Earlier
        1. Developing an Extra in MODX Revolution, Part II - MODX 2.1 and Earlier
        2. Developing an Extra in MODX Revolution, Part III - MODX 2.1 and Earlier
      3. PHP Coding in MODx Revolution, Pt. I
        1. PHP Coding in MODx Revolution, Pt. II
        2. PHP Coding in MODx Revolution, Pt. III
      4. Using Custom Database Tables in your 3rd Party Components
      5. Creating a Blog in MODx Revolution
      6. Loading Pages in the Front-End via AJAX and jQuery Tabs
      7. Reverse Engineer xPDO Classes from Existing Database Table
      8. Integrating a Template into MODX Tutorial
      9. Quick and Easy MODX Tutorials
        1. Automated Server-Side Image Editing
      10. Adding Custom Fields to Manager Forms
      11. Create a Multilingual Website with migxMultiLang
      12. Managing Resources and Elements via SVN
    7. MODX Community Information
      1. Becoming a Core Contributor
      2. Filing Bug Reports
      3. Getting a MODx Account
      4. Using GitHub

Creating a Resource Class

Last edited by Everett Griffiths on Oct 1, 2013.

This tutorial is part of a Series:

We're going to create a sample Custom Resource Class (CRC) that does a very simple task - it outputs a copyright on the bottom of a page with the current date. Yes, something this trivial should be done by placing a Snippet in your Template, but we want to illustrate the concept of CRCs using something very, very simple, so bear with us. :)

This page deals with Part I - creating the actual Custom Resource Class itself. Part II will actually implement the behavior of appending the copyright. Part III will deal with overriding the Controllers, and Part IV will deal with overriding the Processors. The files used in this tutorial can be found on GitHub for reference: https://github.com/modxcms/CopyrightedResource

Create your XML Schema

First, we are going to create a xPDO package using a schema (if you're not familiar on how to do this, please review the page on Developing an Extra in MODX Revolution tutorial and/or the xPDO Defining a Schema tutorial).

If you are planning on versioning this code in Git, your paths may be different, but ultimately you want your files to end up inside the core/components/your_component/ directory. So for this tutorial our package is named "copyrightedresource", so we will create the schema file core/components/copyrightedresource/model/schema/copyrightedresource.mysql.schema.xml:

<?xml version="1.0" encoding="UTF-8"?>
<model package="copyrightedresource" version="1.0" baseClass="xPDOObject" platform="mysql" defaultEngine="MyISAM">
    <object class="CopyrightedResource" extends="modResource" />
</model>

Note that the "package" attribute in the XML should reflect the exact name of our package: "copyrightedresource".

Generating your Class Files

The next step is to generate the maps and classes for the model. You can do this using your own script, you'll just want to refer to the docs on Generating the Model Code and xPDO's parseSchema() function. We've provided a sample script below. It's a modified version of the script used when Reverse Engineering xPDO classes from an existing Database Table.

Create the script at the web root of your MODX site, then execute it by hitting that page in a browser.

Refer to the script at parse_schema.php and adjust it to your own setup.

After this script runs, a handful of PHP files should have been created inside your core/components/copyrightedresource/model/ directory. See the image below.

The copyrightedresource.class.php file should look like this:

<?php
class CopyrightedResource extends modResource {
}

If the class files did not get created, the sample script should help you identify errors (usually permissions).

Customizing your PHP class

Once we have the basic PHP classes generated, we need to customize them.

Be Careful!
Once you've got your PHP classes generated, do not re-run the Parsing Script! Doing so will destroy the changes that you're going to be making.

Now we want to force the class_key of the resource, and ensure that it shows up in the Resource Create context menu (which we'll configure later on):

<?php
class CopyrightedResource extends modResource {
    public $showInContextMenu = true;
    function __construct(xPDO & $xpdo) {
        parent :: __construct($xpdo);
        $this->set('class_key','CopyrightedResource');
    }
}

This forces the class_key to "CopyrightedResource", which is our class, and ensures our Resource class shows up in the left-hand tree's context menu. This is how we govern the value set in the modx_site_content "class_key" column.

You should never add fields to the modResource table (yes, some Extras have done this, but it's not the proper way). Rather, create a separate related table to join into, or use Revolution 2.2.1+'s new properties field to store extra data.

Getting Familiar with the modResourceInterface Interface class

For those of you geeks who want to code responsibly, it's a very good idea to look at the parent class here, so have a look inside the core/model/modx/modresource.class.php.

Code Responsibly
Any time you extend a PHP class, you should look at the parent class, otherwise you won't know what you are implementing!

If you look in the modResource class file, you'll see at the top a PHP Interface that defines what methods must be defined for a CRC to work:

interface modResourceInterface {
    public static function getControllerPath(xPDO &$modx);
    public function getContextMenuText();
    public function getResourceTypeName();
}

We'll now go into detail on each of these methods and how they implement our CRC.

Create a Namespace

Before we go any further, create a Namespace for your component. For the sake of clarity, the name should match the name of your package: "copyrightedresource".

Log into the MODX manager and head to System -> Namespaces.

Namespace: copyrightedresource
Core Path: {core_path}components/copyrightedresource/
Assets Path: {assets_path}components/copyrightedresource/

Note the special placeholders you can use to refer to your directories.

Adding the getControllerPath Method

Once you've added a namespace, we're going to add the getControllerPath method to our class by adding this to your copyrightedresource.class.php class:

public static function getControllerPath(xPDO &$modx) {
    return $modx->getOption('copyrightedresource.core_path',null,$modx->getOption('core_path').'components/copyrightedresource/').'controllers/';
}

This method tells MODX to look for our manager controllers in our custom directory, thereby overriding the standard default controllers. The line first checks for a custom System Setting that shows where our CRC core directory path is (we add this setting to make our life easier when we are developing the code so we can keep it in a location that is non-standard so that we may version it more easily). If the System Setting has not been set, the code will look for our CRC path in 'core/components/copyrightedresource/'. It looks in the "controllers/" subdirectory.

Great! MODX will now look for our controllers in that directory. We'll get into creating those in Step 2 of the tutorial.

Adding the getContextMenuText Method

Go ahead and add this method to your class:

public function getContextMenuText() {
  $this->xpdo->lexicon->load('copyrightedresource:default');
  return array(
    'text_create' => $this->xpdo->lexicon('copyrightedresource'),
    'text_create_here' => $this->xpdo->lexicon('copyrightedresource_create_here'),
  );
}

This returns two translated strings that MODX will insert into the "Create" context menu when right-clicking on a node in the Resource tab on the left-hand tree.

Just to be clear, you don't necessarily need to use the MODX lexicon here. You could return the text like so:

public function getContextMenuText() {
  return array(
    'text_create' => 'Copyrighted Page',
    'text_create_here' => 'Create a Copyrighted Page Here',
  );
}

And that'd work fine. But MODX allows you to load a Lexicon Topic so that you can translate the strings for your worldwide users.

Adding the getResourceTypeName Method

This final method tells MODX what the translated "name" of your CRC is. We probably don't want to call it "CopyrightedResource", so we're going to plop in this method:

public function getResourceTypeName() {
  $this->xpdo->lexicon->load('copyrightedresource:default');
  return $this->xpdo->lexicon('copyrightedresource');
}

Again, this could just return a string:

public function getResourceTypeName() {
  return 'Copyrighted Page';
}

This tells MODX to call it a "Copyrighted Page", rather than its class name, when dealing with it in the manager.

Adding the Class to Extension Packages

To load the CRC properly, you'll need to add it to the Extension Packages. Why? Well, MODX needs to load your CRC when it loads, so that it has a "library" of sorts of all the loaded Resource Classes available to it. MODX 2.2 provides you with an assistance method to add your package to the Extension Packages dataset:

$modx->addExtensionPackage('copyrightedresource','/path/to/copyrightedresource/model/');

Run this code once and MODX will automatically add it to the Extension Packages. Here is another sample script for helping you to do this:

<?php
/**
 * Use this script to add your extension package to MODX's "radar".
 * This should only need to be done once.
 * Note that we have to instantiate MODX: xPDO is not sufficient
 * because we're running functions that exist only in MODX, not in the 
 * underlying xPDO framework.
 *
 * USAGE:
 * 1. Copy this file into the docroot (web root) of your MODX installation.
 * 2. Execute the file by visiting it in a browser, e.g. http://yoursite.com/add_extension.php
 */
//------------------------------------------------------------------------------
//! CONFIGURATION
//------------------------------------------------------------------------------
// Your package shortname:
$package_name = 'copyrightedresource';

//------------------------------------------------------------------------------
//  DO NOT TOUCH BELOW THIS LINE
//------------------------------------------------------------------------------
define('MODX_API_MODE', true);
require_once('index.php');
if (!defined('MODX_CORE_PATH')) {
    print '<p>MODX_CORE_PATH not defined! Did you put this script in the web root of your MODX installation?</p>';
    exit;
}

$modx= new modX();
$modx->initialize('mgr');

$modx->setLogLevel(xPDO::LOG_LEVEL_INFO);
$modx->setLogTarget(XPDO_CLI_MODE ? 'ECHO' : 'HTML');

$modx->addExtensionPackage($package_name,"[[++core_path]]components/$package_name/model/");

print 'Success!';
?>

To test whether or not this worked, log into the MODX manager and search the System Settings for the "extension_packages" key. You should see something like this:

[{"copyrightedresource":{"path":"[[++core_path]]components/copyrightedresource/model/"}}]

Note that you can use core_path placeholder in this path: this offers way to ensure that your path will work should you ever migrate your MODX site to a different server.

There's also a removeExtensionPackage as well for removing the package from MODX.

addExtensionPackage and removeExtensionPackage are very useful methods to add to a Resolver if you're building an Extra for your CRC so that this happens on install and uninstall.

Conclusion

Now, if you reload the page and right-click on a Resource in the tree, then move over "Create", you should see this:

Fantastic! Now we've got our Custom Resource Class loaded, and we're ready to start actually getting into the nitty-gritty. Proceed onto Step 2!

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