1 Friendica Addon development
6 Please see the sample addon 'randplace' for a working example of using some of these features.
7 Addons work by intercepting event hooks - which must be registered.
8 Modules work by intercepting specific page requests (by URL path).
10 Addon names cannot contain spaces or other punctuation and are used as filenames and function names.
11 You may supply a "friendly" name within the comment block.
12 Each addon must contain both an install and an uninstall function based on the addon name.
13 For instance "addon1name_install()".
14 These two functions take no arguments and are usually responsible for registering (and unregistering) event hooks that your addon will require.
15 The install and uninstall functions will also be called (i.e. re-installed) if the addon changes after installation.
16 Therefore your uninstall should not destroy data and install should consider that data may already exist.
17 Future extensions may provide for "setup" amd "remove".
19 Addons should contain a comment block with the four following parameters:
22 * Name: My Great Addon
23 * Description: This is what my addon does. It's really cool.
25 * Author: John Q. Public <john@myfriendicasite.com>
28 Please also add a README or README.md file to the addon directory.
29 It will be displayed in the admin panel and should include some further information in addition to the header information.
33 Register your addon hooks during installation.
35 Addon::registerHook($hookname, $file, $function);
37 $hookname is a string and corresponds to a known Friendica PHP hook.
39 $file is a pathname relative to the top-level Friendica directory.
40 This *should* be 'addon/*addon_name*/*addon_name*.php' in most cases.
42 $function is a string and is the name of the function which will be executed when the hook is called.
45 Your hook callback functions will be called with at least one and possibly two arguments
47 function myhook_function(App $a, &$b) {
52 If you wish to make changes to the calling data, you must declare them as reference variables (with `&`) during function declaration.
55 $a is the Friendica `App` class.
56 It contains a wealth of information about the current state of Friendica:
58 * which module has been called,
59 * configuration information,
60 * the page contents at the point the hook was invoked,
61 * profile and user information, etc.
63 It is recommeded you call this `$a` to match its usage elsewhere.
66 $b can be called anything you like.
67 This is information specific to the hook currently being processed, and generally contains information that is being immediately processed or acted on that you can use, display, or alter.
68 Remember to declare it with `&` if you wish to alter it.
70 ## JavaScript addon hooks
74 Make sure your JavaScript addon file (addon/*addon_name*/*addon_name*.js) is listed in the document response.
76 In your addon install function, add:
79 Addon::registerHook('template_vars', __FILE__, '<addon_name>_template_vars');
82 In your addon uninstall function, add:
85 Addon::unregisterHook('template_vars', __FILE__, '<addon_name>_template_vars');
88 Then, add your addon name to the *addon_hooks* template variable array:
91 function <addon_name>_template_vars($a, &$arr)
93 if (!array_key_exists('addon_hooks', $arr['vars']))
95 $arr['vars']['addon_hooks'] = array();
97 $arr['vars']['addon_hooks'][] = "<addon_name>";
103 Register your addon hooks in file `addon/*addon_name*/*addon_name*.js`.
106 document.addEventListener(name, callback);
109 *name* is the name of the hook and corresponds to a known Friendica JavaScript hook.
110 *callback* is a JavaScript function to execute.
114 Addons may also act as "modules" and intercept all page requests for a given URL path.
115 In order for a addon to act as a module it needs to define a function "addon_name_module()" which takes no arguments and needs not do anything.
117 If this function exists, you will now receive all page requests for "http://my.web.site/addon_name" - with any number of URL components as additional arguments.
118 These are parsed into an array $a->argv, with a corresponding $a->argc indicating the number of URL components.
119 So http://my.web.site/addon/arg1/arg2 would look for a module named "addon" and pass its module functions the $a App structure (which is available to many components).
124 $a->argv = array(0 => 'addon', 1 => 'arg1', 2 => 'arg2');
127 Your module functions will often contain the function addon_name_content(App $a), which defines and returns the page body content.
128 They may also contain addon_name_post(App $a) which is called before the _content function and typically handles the results of POST forms.
129 You may also have addon_name_init(App $a) which is called very early on and often does module initialisation.
133 If your addon needs some template, you can use the Friendica template system.
134 Friendica uses [smarty3](http://www.smarty.net/) as a template engine.
136 Put your tpl files in the *templates/* subfolder of your addon.
138 In your code, like in the function addon_name_content(), load the template file and execute it passing needed values:
141 # load template file. first argument is the template name,
142 # second is the addon path relative to friendica top folder
143 $tpl = get_markup_template('mytemplate.tpl', 'addon/addon_name/');
145 # apply template. first argument is the loaded template,
146 # second an array of 'name' => 'values' to pass to template
147 $output = replace_macros($tpl, array(
148 'title' => 'My beautiful addon',
152 See also the wiki page [Quick Template Guide](https://github.com/friendica/friendica/wiki/Quick-Template-Guide).
157 Called when a user attempts to login.
158 `$b` is an array containing:
160 - **username**: the supplied username
161 - **password**: the supplied password
162 - **authenticated**: set this to non-zero to authenticate the user.
163 - **user_record**: successful authentication must also return a valid user record from the database
166 Called after a user has successfully logged in.
167 `$b` contains the `$a->user` array.
170 Called when formatting a post for display.
173 - **item**: The item (array) details pulled from the database
174 - **output**: the (string) HTML representation of this item prior to adding it to the page
177 Called when a status post or comment is entered on the local system.
178 `$b` is the item array of the information to be stored in the database.
179 Please note: body contents are bbcode - not HTML.
182 Called when a local status post or comment has been stored on the local system.
183 `$b` is the item array of the information which has just been stored in the database.
184 Please note: body contents are bbcode - not HTML
187 Called when receiving a post from another source. This may also be used to post local activity or system generated messages.
188 `$b` is the item array of information to be stored in the database and the item body is bbcode.
191 Called when generating the HTML for the user Settings page.
192 `$b` is the HTML string of the settings page before the final `</form>` tag.
195 Called when the Settings pages are submitted.
196 `$b` is the $_POST array.
199 Called when generating the HTML for the addon settings page.
200 `$b` is the (string) HTML of the addon settings page before the final `</form>` tag.
202 ### addon_settings_post
203 Called when the Addon Settings pages are submitted.
204 `$b` is the $_POST array.
207 Called when posting a profile page.
208 `$b` is the $_POST array.
211 Called prior to output of profile edit page.
212 `$b` is an array containing:
214 - **profile**: profile (array) record from the database
215 - **entry**: the (string) HTML of the generated entry
218 Called when the HTML is generated for the Advanced profile, corresponding to the Profile tab within a person's profile page.
219 `$b` is the HTML string representation of the generated profile.
220 The profile array details are in `$a->profile`.
223 Called from the Directory page when formatting an item for display.
226 - **contact**: contact record array for the person from the database
227 - **entry**: the HTML string of the generated entry
229 ### profile_sidebar_enter
230 Called prior to generating the sidebar "short" profile for a page.
231 `$b` is the person's profile array
234 Called when generating the sidebar "short" profile for a page.
237 - **profile**: profile record array for the person from the database
238 - **entry**: the HTML string of the generated entry
240 ### contact_block_end
241 Called when formatting the block of contacts/friends on a profile sidebar has completed.
244 - **contacts**: array of contacts
245 - **output**: the generated HTML string of the contact block
248 Called after conversion of bbcode to HTML.
249 `$b` is an HTML string converted text.
252 Called after tag conversion of HTML to bbcode (e.g. remote message posting)
253 `$b` is a string converted text
256 Called when building the `<head>` sections.
257 Stylesheets should be registered using this hook.
258 `$b` is an HTML string of the `<head>` tag.
261 Called after building the page navigation section.
262 `$b` is a string HTML of nav region.
265 Called prior to output of personal XRD file.
268 - **user**: the user record array for the person
269 - **xml**: the complete XML string to be output
272 Called prior to output home page content, shown to unlogged users.
273 `$b` is the HTML sring of section region.
276 Called when editing contact details on an individual from the Contacts page.
279 - **contact**: contact record (array) of target contact
280 - **output**: the (string) generated HTML of the contact edit page
282 ### contact_edit_post
283 Called when posting the contact edit page.
284 `$b` is the `$_POST` array
287 Called just after DB has been opened and before session start.
291 Called after HTML content functions have completed.
292 `$b` is (string) HTML of content div.
295 Called after HTML content functions have completed.
296 Deferred Javascript files should be registered using this hook.
297 `$b` is (string) HTML of footer div/element.
300 Called when looking up the avatar. `$b` is an array:
302 - **size**: the size of the avatar that will be looked up
303 - **email**: email to look up the avatar for
304 - **url**: the (string) generated URL of the avatar
306 ### emailer_send_prepare
307 Called from `Emailer::send()` before building the mime message.
308 `$b` is an array of params to `Emailer::send()`.
310 - **fromName**: name of the sender
311 - **fromEmail**: email fo the sender
312 - **replyTo**: replyTo address to direct responses
313 - **toEmail**: destination email address
314 - **messageSubject**: subject of the message
315 - **htmlVersion**: html version of the message
316 - **textVersion**: text only version of the message
317 - **additionalMailHeader**: additions to the smtp mail header
320 Called before calling PHP's `mail()`.
321 `$b` is an array of params to `mail()`.
329 Called during `App` initialization to allow addons to load their own configuration file(s) with `App::loadConfigFile()`.
332 Called after the navigational menu is build in `include/nav.php`.
333 `$b` is an array containing `$nav` from `include/nav.php`.
336 Called before vars are passed to the template engine to render the page.
337 The registered function can add,change or remove variables passed to template.
338 `$b` is an array with:
340 - **template**: filename of template
341 - **vars**: array of vars passed to the template
344 Called after the other queries have passed.
345 The registered function can add, change or remove the `acl_lookup()` variables.
347 - **results**: array of the acl_lookup() vars
349 ### prepare_body_init
350 Called at the start of prepare_body
353 - **item** (input/output): item array
355 ### prepare_body_content_filter
356 Called before the HTML conversion in prepare_body. If the item matches a content filter rule set by an addon, it should
357 just add the reason to the filter_reasons element of the hook data.
360 - **item**: item array (input)
361 - **filter_reasons** (input/output): reasons array
364 Called after the HTML conversion in `prepare_body()`.
367 - **item** (input): item array
368 - **html** (input/output): converted item body
369 - **is_preview** (input): post preview flag
370 - **filter_reasons** (input): reasons array
372 ### prepare_body_final
373 Called at the end of `prepare_body()`.
376 - **item**: item array (input)
377 - **html**: converted item body (input/output)
379 ### put_item_in_cache
380 Called after `prepare_text()` in `put_item_in_cache()`.
383 - **item** (input): item array
384 - **rendered-html** (input/output): final item body HTML
385 - **rendered-hash** (input/output): original item body hash
387 ### magic_auth_success
388 Called when a magic-auth was successful.
391 visitor => array with the contact record of the visitor
392 url => the query string
394 ## Current JavaScript hooks
396 ### postprocess_liveupdate
397 Called at the end of the live update process (XmlHttpRequest)
399 ## Complete list of hook callbacks
401 Here is a complete list of all hook callbacks with file locations (as of 01-Apr-2018). Please see the source for details of any hooks not documented above.
405 Addon::callHooks('init_1');
406 Addon::callHooks('app_menu', $arr);
407 Addon::callHooks('page_content_top', $a->page['content']);
408 Addon::callHooks($a->module.'_mod_init', $placeholder);
409 Addon::callHooks($a->module.'_mod_init', $placeholder);
410 Addon::callHooks($a->module.'_mod_post', $_POST);
411 Addon::callHooks($a->module.'_mod_afterpost', $placeholder);
412 Addon::callHooks($a->module.'_mod_content', $arr);
413 Addon::callHooks($a->module.'_mod_aftercontent', $arr);
414 Addon::callHooks('page_end', $a->page['content']);
418 Addon::callHooks('logged_in', $a->user);
419 Addon::callHooks('authenticate', $addon_auth);
420 Addon::callHooks('logged_in', $a->user);
422 ### include/enotify.php
424 Addon::callHooks('enotify', $h);
425 Addon::callHooks('enotify_store', $datarray);
426 Addon::callHooks('enotify_mail', $datarray);
427 Addon::callHooks('check_item_notification', $notification_data);
429 ### include/conversation.php
431 Addon::callHooks('conversation_start', $cb);
432 Addon::callHooks('render_location', $locate);
433 Addon::callHooks('display_item', $arr);
434 Addon::callHooks('display_item', $arr);
435 Addon::callHooks('item_photo_menu', $args);
436 Addon::callHooks('jot_tool', $jotplugins);
438 ### include/security.php
440 Addon::callHooks('logged_in', $a->user);
444 Addon::callHooks('contact_block_end', $arr);
445 Addon::callHooks('poke_verbs', $arr);
446 Addon::callHooks('put_item_in_cache', $hook_data);
447 Addon::callHooks('prepare_body_init', $item);
448 Addon::callHooks('prepare_body_content_filter', $hook_data);
449 Addon::callHooks('prepare_body', $hook_data);
450 Addon::callHooks('prepare_body_final', $hook_data);
452 ### include/items.php
454 Addon::callHooks('page_info_data', $data);
456 ### mod/directory.php
458 Addon::callHooks('directory_item', $arr);
462 Addon::callHooks('personal_xrd', $arr);
466 Addon::callHooks('network_ping', $arr);
468 ### mod/parse_url.php
470 Addon::callHooks("parse_link", $arr);
474 Addon::callHooks('home_init', $ret);
478 Addon::callHooks('acl_lookup_end', $results);
482 Addon::callHooks('network_content_init', $arr);
483 Addon::callHooks('network_tabs', $arr);
485 ### mod/friendica.php
487 Addon::callHooks('about_hook', $o);
489 ### mod/subthread.php
491 Addon::callHooks('post_local_end', $arr);
495 Addon::callHooks('profile_post', $_POST);
496 Addon::callHooks('profile_edit', $arr);
500 Addon::callHooks('addon_settings_post', $_POST);
501 Addon::callHooks('connector_settings_post', $_POST);
502 Addon::callHooks('display_settings_post', $_POST);
503 Addon::callHooks('settings_post', $_POST);
504 Addon::callHooks('addon_settings', $settings_addons);
505 Addon::callHooks('connector_settings', $settings_connectors);
506 Addon::callHooks('display_settings', $o);
507 Addon::callHooks('settings_form', $o);
511 Addon::callHooks('photo_post_init', $_POST);
512 Addon::callHooks('photo_post_file', $ret);
513 Addon::callHooks('photo_post_end', $foo);
514 Addon::callHooks('photo_post_end', $foo);
515 Addon::callHooks('photo_post_end', $foo);
516 Addon::callHooks('photo_post_end', $foo);
517 Addon::callHooks('photo_post_end', intval($item_id));
518 Addon::callHooks('photo_upload_form', $ret);
522 Addon::callHooks('profile_advanced', $o);
526 Addon::callHooks('home_init', $ret);
527 Addon::callHooks("home_content", $content);
531 Addon::callHooks('post_local_end', $arr);
535 Addon::callHooks('contact_edit_post', $_POST);
536 Addon::callHooks('contact_edit', $arr);
540 Addon::callHooks('post_local_end', $arr);
544 Addon::callHooks('lockview_content', $item);
548 Addon::callHooks('uexport_options', $options);
552 Addon::callHooks('register_post', $arr);
553 Addon::callHooks('register_form', $arr);
557 Addon::callHooks('post_local_start', $_REQUEST);
558 Addon::callHooks('post_local', $datarray);
559 Addon::callHooks('post_local_end', $datarray);
563 Addon::callHooks('jot_tool', $jotplugins);
565 ### src/Network/FKOAuth1.php
567 Addon::callHooks('logged_in', $a->user);
569 ### src/Render/FriendicaSmartyEngine.php
571 Addon::callHooks("template_vars", $arr);
575 Addon::callHooks('load_config');
576 Addon::callHooks('head');
577 Addon::callHooks('footer');
579 ### src/Model/Item.php
581 Addon::callHooks('post_local', $item);
582 Addon::callHooks('post_remote', $item);
583 Addon::callHooks('post_local_end', $posted_item);
584 Addon::callHooks('post_remote_end', $posted_item);
585 Addon::callHooks('tagged', $arr);
586 Addon::callHooks('post_local_end', $new_item);
588 ### src/Model/Contact.php
590 Addon::callHooks('contact_photo_menu', $args);
591 Addon::callHooks('follow', $arr);
593 ### src/Model/Profile.php
595 Addon::callHooks('profile_sidebar_enter', $profile);
596 Addon::callHooks('profile_sidebar', $arr);
597 Addon::callHooks('profile_tabs', $arr);
598 Addon::callHooks('zrl_init', $arr);
599 Addon::callHooks('magic_auth_success', $arr);
601 ### src/Model/Event.php
603 Addon::callHooks('event_updated', $event['id']);
604 Addon::callHooks("event_created", $event['id']);
606 ### src/Model/User.php
608 Addon::callHooks('register_account', $uid);
609 Addon::callHooks('remove_user', $user);
611 ### src/Content/Text/BBCode.php
613 Addon::callHooks('bbcode', $text);
614 Addon::callHooks('bb2diaspora', $text);
616 ### src/Content/Text/HTML.php
618 Addon::callHooks('html2bbcode', $message);
620 ### src/Content/Smilies.php
622 Addon::callHooks('smilie', $params);
624 ### src/Content/Feature.php
626 Addon::callHooks('isEnabled', $arr);
627 Addon::callHooks('get', $arr);
629 ### src/Content/ContactSelector.php
631 Addon::callHooks('network_to_name', $nets);
632 Addon::callHooks('gender_selector', $select);
633 Addon::callHooks('sexpref_selector', $select);
634 Addon::callHooks('marital_selector', $select);
636 ### src/Content/OEmbed.php
638 Addon::callHooks('oembed_fetch_url', $embedurl, $j);
640 ### src/Content/Nav.php
642 Addon::callHooks('page_header', $a->page['nav']);
643 Addon::callHooks('nav_info', $nav);
645 ### src/Worker/Directory.php
647 Addon::callHooks('globaldir_update', $arr);
649 ### src/Worker/Notifier.php
651 Addon::callHooks('notifier_end', $target_item);
653 ### src/Worker/Queue.php
655 Addon::callHooks('queue_predeliver', $r);
656 Addon::callHooks('queue_deliver', $params);
658 ### src/Module/Login.php
660 Addon::callHooks('authenticate', $addon_auth);
661 Addon::callHooks('login_hook', $o);
663 ### src/Module/Logout.php
665 Addon::callHooks("logging_out");
667 ### src/Object/Post.php
669 Addon::callHooks('render_location', $locate);
670 Addon::callHooks('display_item', $arr);
674 Addon::callHooks('contact_select_options', $x);
675 Addon::callHooks($a->module.'_pre_'.$selname, $arr);
676 Addon::callHooks($a->module.'_post_'.$selname, $o);
677 Addon::callHooks($a->module.'_pre_'.$selname, $arr);
678 Addon::callHooks($a->module.'_post_'.$selname, $o);
679 Addon::callHooks('jot_networks', $jotnets);
681 ### src/Core/Worker.php
683 Addon::callHooks("proc_run", $arr);
685 ### src/Util/Emailer.php
687 Addon::callHooks('emailer_send_prepare', $params);
688 Addon::callHooks("emailer_send", $hookdata);
692 Addon::callHooks('generate_map', $arr);
693 Addon::callHooks('generate_named_map', $arr);
694 Addon::callHooks('Map::getCoordinates', $arr);
696 ### src/Util/Network.php
698 Addon::callHooks('avatar_lookup', $avatar);
700 ### src/Util/ParseUrl.php
702 Addon::callHooks("getsiteinfo", $siteinfo);
704 ### src/Protocol/DFRN.php
706 Addon::callHooks('atom_feed_end', $atom);
707 Addon::callHooks('atom_feed_end', $atom);
711 document.dispatchEvent(new Event('postprocess_liveupdate'));