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.
34 Register your addon hooks during installation.
36 Addon::registerHook($hookname, $file, $function);
38 $hookname is a string and corresponds to a known Friendica PHP hook.
40 $file is a pathname relative to the top-level Friendica directory.
41 This *should* be 'addon/*addon_name*/*addon_name*.php' in most cases.
43 $function is a string and is the name of the function which will be executed when the hook is called.
46 Your hook callback functions will be called with at least one and possibly two arguments
48 function myhook_function(App $a, &$b) {
53 If you wish to make changes to the calling data, you must declare them as reference variables (with '&') during function declaration.
56 $a is the Friendica 'App' class.
57 It contains a wealth of information about the current state of Friendica:
59 * which module has been called,
60 * configuration information,
61 * the page contents at the point the hook was invoked,
62 * profile and user information, etc.
64 It is recommeded you call this '$a' to match its usage elsewhere.
67 $b can be called anything you like.
68 This is information specific to the hook currently being processed, and generally contains information that is being immediately processed or acted on that you can use, display, or alter.
69 Remember to declare it with '&' if you wish to alter it.
71 JavaScript addon hooks
75 Make sure your JavaScript addon file (addon/*addon_name*/*addon_name*.js) is listed in the document response.
77 In your addon install function, add:
79 Addon::registerHook('template_vars', 'addon/<addon_name>/<addon_name>.php', '<addon_name>_template_vars');
81 In your addon uninstall function, add:
83 Addon::unregisterHook('template_vars', 'addon/<addon_name>/<addon_name>.php', '<addon_name>_template_vars');
85 Then, add your addon name to the *addon_hooks* template variable array:
87 function <addon_name>_template_vars($a, &$arr)
89 if (!array_key_exists('addon_hooks',$arr['vars']))
91 $arr['vars']['addon_hooks'] = array();
93 $arr['vars']['addon_hooks'][] = "<addon_name>";
97 Register your addon hooks in file 'addon/*addon_name*/*addon_name*.js'.
99 Addon_registerHook(type,hookfnstr);
101 *type* is the name of the hook and corresponds to a known Friendica JavaScript hook.
102 *hookfnstr* is the name of your JavaScript function to execute.
104 No arguments are provided to your JavaScript callback function. Example:
106 function myhook_function() {
113 Addons may also act as "modules" and intercept all page requests for a given URL path.
114 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.
116 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.
117 These are parsed into an array $a->argv, with a corresponding $a->argc indicating the number of URL components.
118 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).
122 $a->argv = array(0 => 'addon', 1 => 'arg1', 2 => 'arg2');
124 Your module functions will often contain the function addon_name_content(App $a), which defines and returns the page body content.
125 They may also contain addon_name_post(App $a) which is called before the _content function and typically handles the results of POST forms.
126 You may also have addon_name_init(App $a) which is called very early on and often does module initialisation.
131 If your addon needs some template, you can use the Friendica template system.
132 Friendica uses [smarty3](http://www.smarty.net/) as a template engine.
134 Put your tpl files in the *templates/* subfolder of your addon.
136 In your code, like in the function addon_name_content(), load the template file and execute it passing needed values:
138 # load template file. first argument is the template name,
139 # second is the addon path relative to friendica top folder
140 $tpl = get_markup_template('mytemplate.tpl', 'addon/addon_name/');
142 # apply template. first argument is the loaded template,
143 # second an array of 'name'=>'values' to pass to template
144 $output = replace_macros($tpl,array(
145 'title' => 'My beautiful addon',
148 See also the wiki page [Quick Template Guide](https://github.com/friendica/friendica/wiki/Quick-Template-Guide).
154 'authenticate' is called when a user attempts to login.
155 $b is an array containing:
157 'username' => the supplied username
158 'password' => the supplied password
159 'authenticated' => set this to non-zero to authenticate the user.
160 'user_record' => successful authentication must also return a valid user record from the database
163 'logged_in' is called after a user has successfully logged in.
164 $b contains the $a->user array.
167 'display_item' is called when formatting a post for display.
170 'item' => The item (array) details pulled from the database
171 'output' => the (string) HTML representation of this item prior to adding it to the page
174 * called when a status post or comment is entered on the local system
175 * $b is the item array of the information to be stored in the database
176 * Please note: body contents are bbcode - not HTML
179 * called when a local status post or comment has been stored on the local system
180 * $b is the item array of the information which has just been stored in the database
181 * Please note: body contents are bbcode - not HTML
184 * called when receiving a post from another source. This may also be used to post local activity or system generated messages.
185 * $b is the item array of information to be stored in the database and the item body is bbcode.
188 * called when generating the HTML for the user Settings page
189 * $b is the (string) HTML of the settings page before the final '</form>' tag.
192 * called when the Settings pages are submitted
193 * $b is the $_POST array
196 * called when generating the HTML for the addon settings page
197 * $b is the (string) HTML of the addon settings page before the final '</form>' tag.
199 ### 'addon_settings_post'
200 * called when the Addon Settings pages are submitted
201 * $b is the $_POST array
204 * called when posting a profile page
205 * $b is the $_POST array
208 'profile_edit' is called prior to output of profile edit page.
209 $b is an array containing:
211 'profile' => profile (array) record from the database
212 'entry' => the (string) HTML of the generated entry
214 ### 'profile_advanced'
215 * called when the HTML is generated for the 'Advanced profile', corresponding to the 'Profile' tab within a person's profile page
216 * $b is the (string) HTML representation of the generated profile
217 * The profile array details are in $a->profile.
220 'directory_item' is called from the Directory page when formatting an item for display.
223 'contact' => contact (array) record for the person from the database
224 'entry' => the (string) HTML of the generated entry
226 ### 'profile_sidebar_enter'
227 * called prior to generating the sidebar "short" profile for a page
228 * $b is the person's profile array
230 ### 'profile_sidebar'
231 'profile_sidebar is called when generating the sidebar "short" profile for a page.
234 'profile' => profile (array) record for the person from the database
235 'entry' => the (string) HTML of the generated entry
237 ### 'contact_block_end'
238 is called when formatting the block of contacts/friends on a profile sidebar has completed.
241 'contacts' => array of contacts
242 'output' => the (string) generated HTML of the contact block
245 * called during conversion of bbcode to html
246 * $b is a string converted text
249 * called during conversion of html to bbcode (e.g. remote message posting)
250 * $b is a string converted text
253 * called after building the page navigation section
254 * $b is a string HTML of nav region
257 'personal_xrd' is called prior to output of personal XRD file.
260 'user' => the user record for the person
261 'xml' => the complete XML to be output
264 * called prior to output home page content, shown to unlogged users
265 * $b is (string) HTML of section region
268 is called when editing contact details on an individual from the Contacts page.
271 'contact' => contact record (array) of target contact
272 'output' => the (string) generated HTML of the contact edit page
274 ### 'contact_edit_post'
275 * called when posting the contact edit page.
276 * $b is the $_POST array
279 * called just after DB has been opened and before session start
280 * $b is not used or passed
283 * called after HTML content functions have completed
284 * $b is (string) HTML of content div
287 'avatar_lookup' is called when looking up the avatar.
290 'size' => the size of the avatar that will be looked up
291 'email' => email to look up the avatar for
292 'url' => the (string) generated URL of the avatar
294 ### 'emailer_send_prepare'
295 'emailer_send_prepare' called from Emailer::send() before building the mime message.
296 $b is an array, params to Emailer::send()
298 'fromName' => name of the sender
299 'fromEmail' => email fo the sender
300 'replyTo' => replyTo address to direct responses
301 'toEmail' => destination email address
302 'messageSubject' => subject of the message
303 'htmlVersion' => html version of the message
304 'textVersion' => text only version of the message
305 'additionalMailHeader' => additions to the smtp mail header
308 is called before calling PHP's mail().
309 $b is an array, params to mail()
317 is called after the navigational menu is build in include/nav.php.
318 $b is an array containing $nav from nav.php.
321 is called before vars are passed to the template engine to render the page.
322 The registered function can add,change or remove variables passed to template.
325 'template' => filename of template
326 'vars' => array of vars passed to template
329 is called after the other queries have passed.
330 The registered function can add, change or remove the acl_lookup() variables.
332 'results' => array of the acl_lookup() vars
334 ### 'prepare_body_init'
335 Called at the start of prepare_body
337 'item' => item array (input/output)
339 ### 'prepare_body_content_filter'
340 Called before the HTML conversion in prepare_body. If the item matches a content filter rule set by an addon, it should
341 just add the reason to the filter_reasons element of the hook data.
343 'item' => item array (input)
344 'filter_reasons' => reasons array (input/output)
347 Called after the HTML conversion in prepare_body.
349 'item' => item array (input)
350 'html' => converted item body (input/output)
351 'is_preview' => post preview flag (input)
352 'filter_reasons' => reasons array (input)
354 ### 'prepare_body_final'
355 Called at the end of prepare_body.
357 'item' => item array (input)
358 'html' => converted item body (input/output)
360 Current JavaScript hooks
363 ### 'postprocess_liveupdate'
364 Called at the end of the live update process (XmlHttpRequest)
366 Complete list of hook callbacks
369 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.
373 Addon::callHooks('init_1');
374 Addon::callHooks('app_menu', $arr);
375 Addon::callHooks('page_content_top', $a->page['content']);
376 Addon::callHooks($a->module.'_mod_init', $placeholder);
377 Addon::callHooks($a->module.'_mod_init', $placeholder);
378 Addon::callHooks($a->module.'_mod_post', $_POST);
379 Addon::callHooks($a->module.'_mod_afterpost', $placeholder);
380 Addon::callHooks($a->module.'_mod_content', $arr);
381 Addon::callHooks($a->module.'_mod_aftercontent', $arr);
382 Addon::callHooks('page_end', $a->page['content']);
386 Addon::callHooks('logged_in', $a->user);
387 Addon::callHooks('authenticate', $addon_auth);
388 Addon::callHooks('logged_in', $a->user);
390 ### include/enotify.php
392 Addon::callHooks('enotify', $h);
393 Addon::callHooks('enotify_store', $datarray);
394 Addon::callHooks('enotify_mail', $datarray);
395 Addon::callHooks('check_item_notification', $notification_data);
397 ### include/conversation.php
399 Addon::callHooks('conversation_start', $cb);
400 Addon::callHooks('render_location', $locate);
401 Addon::callHooks('display_item', $arr);
402 Addon::callHooks('display_item', $arr);
403 Addon::callHooks('item_photo_menu', $args);
404 Addon::callHooks('jot_tool', $jotplugins);
406 ### include/security.php
408 Addon::callHooks('logged_in', $a->user);
412 Addon::callHooks('contact_block_end', $arr);
413 Addon::callHooks('poke_verbs', $arr);
414 Addon::callHooks('prepare_body_init', $item);
415 Addon::callHooks('prepare_body_content_filter', $hook_data);
416 Addon::callHooks('prepare_body', $hook_data);
417 Addon::callHooks('prepare_body_final', $hook_data);
419 ### include/items.php
421 Addon::callHooks('page_info_data', $data);
423 ### mod/directory.php
425 Addon::callHooks('directory_item', $arr);
429 Addon::callHooks('personal_xrd', $arr);
433 Addon::callHooks('network_ping', $arr);
435 ### mod/parse_url.php
437 Addon::callHooks("parse_link", $arr);
441 Addon::callHooks('home_init', $ret);
445 Addon::callHooks('acl_lookup_end', $results);
449 Addon::callHooks('network_content_init', $arr);
450 Addon::callHooks('network_tabs', $arr);
452 ### mod/friendica.php
454 Addon::callHooks('about_hook', $o);
456 ### mod/subthread.php
458 Addon::callHooks('post_local_end', $arr);
462 Addon::callHooks('profile_post', $_POST);
463 Addon::callHooks('profile_edit', $arr);
467 Addon::callHooks('addon_settings_post', $_POST);
468 Addon::callHooks('connector_settings_post', $_POST);
469 Addon::callHooks('display_settings_post', $_POST);
470 Addon::callHooks('settings_post', $_POST);
471 Addon::callHooks('addon_settings', $settings_addons);
472 Addon::callHooks('connector_settings', $settings_connectors);
473 Addon::callHooks('display_settings', $o);
474 Addon::callHooks('settings_form', $o);
478 Addon::callHooks('photo_post_init', $_POST);
479 Addon::callHooks('photo_post_file', $ret);
480 Addon::callHooks('photo_post_end', $foo);
481 Addon::callHooks('photo_post_end', $foo);
482 Addon::callHooks('photo_post_end', $foo);
483 Addon::callHooks('photo_post_end', $foo);
484 Addon::callHooks('photo_post_end', intval($item_id));
485 Addon::callHooks('photo_upload_form', $ret);
489 Addon::callHooks('profile_advanced', $o);
493 Addon::callHooks('home_init', $ret);
494 Addon::callHooks("home_content", $content);
498 Addon::callHooks('post_local_end', $arr);
502 Addon::callHooks('contact_edit_post', $_POST);
503 Addon::callHooks('contact_edit', $arr);
507 Addon::callHooks('post_local_end', $arr);
511 Addon::callHooks('lockview_content', $item);
515 Addon::callHooks('uexport_options', $options);
519 Addon::callHooks('register_post', $arr);
520 Addon::callHooks('register_form', $arr);
524 Addon::callHooks('post_local_start', $_REQUEST);
525 Addon::callHooks('post_local', $datarray);
526 Addon::callHooks('post_local_end', $datarray);
530 Addon::callHooks('jot_tool', $jotplugins);
532 ### src/Network/FKOAuth1.php
534 Addon::callHooks('logged_in', $a->user);
536 ### src/Render/FriendicaSmartyEngine.php
538 Addon::callHooks("template_vars", $arr);
540 ### src/Model/Item.php
542 Addon::callHooks('post_local', $item);
543 Addon::callHooks('post_remote', $item);
544 Addon::callHooks('post_local_end', $posted_item);
545 Addon::callHooks('post_remote_end', $posted_item);
546 Addon::callHooks('tagged', $arr);
547 Addon::callHooks('post_local_end', $new_item);
549 ### src/Model/Contact.php
551 Addon::callHooks('contact_photo_menu', $args);
552 Addon::callHooks('follow', $arr);
554 ### src/Model/Profile.php
556 Addon::callHooks('profile_sidebar_enter', $profile);
557 Addon::callHooks('profile_sidebar', $arr);
558 Addon::callHooks('profile_tabs', $arr);
559 Addon::callHooks('zrl_init', $arr);
561 ### src/Model/Event.php
563 Addon::callHooks('event_updated', $event['id']);
564 Addon::callHooks("event_created", $event['id']);
566 ### src/Model/User.php
568 Addon::callHooks('register_account', $uid);
569 Addon::callHooks('remove_user', $user);
571 ### src/Content/Text/BBCode.php
573 Addon::callHooks('bbcode', $text);
574 Addon::callHooks('bb2diaspora', $text);
576 ### src/Content/Text/HTML.php
578 Addon::callHooks('html2bbcode', $message);
580 ### src/Content/Smilies.php
582 Addon::callHooks('smilie', $params);
584 ### src/Content/Feature.php
586 Addon::callHooks('isEnabled', $arr);
587 Addon::callHooks('get', $arr);
589 ### src/Content/ContactSelector.php
591 Addon::callHooks('network_to_name', $nets);
592 Addon::callHooks('gender_selector', $select);
593 Addon::callHooks('sexpref_selector', $select);
594 Addon::callHooks('marital_selector', $select);
596 ### src/Content/OEmbed.php
598 Addon::callHooks('oembed_fetch_url', $embedurl, $j);
600 ### src/Content/Nav.php
602 Addon::callHooks('page_header', $a->page['nav']);
603 Addon::callHooks('nav_info', $nav);
605 ### src/Worker/Directory.php
607 Addon::callHooks('globaldir_update', $arr);
609 ### src/Worker/Notifier.php
611 Addon::callHooks('notifier_end', $target_item);
613 ### src/Worker/Queue.php
615 Addon::callHooks('queue_predeliver', $r);
616 Addon::callHooks('queue_deliver', $params);
618 ### src/Module/Login.php
620 Addon::callHooks('authenticate', $addon_auth);
621 Addon::callHooks('login_hook', $o);
623 ### src/Module/Logout.php
625 Addon::callHooks("logging_out");
627 ### src/Object/Post.php
629 Addon::callHooks('render_location', $locate);
630 Addon::callHooks('display_item', $arr);
634 Addon::callHooks('contact_select_options', $x);
635 Addon::callHooks($a->module.'_pre_'.$selname, $arr);
636 Addon::callHooks($a->module.'_post_'.$selname, $o);
637 Addon::callHooks($a->module.'_pre_'.$selname, $arr);
638 Addon::callHooks($a->module.'_post_'.$selname, $o);
639 Addon::callHooks('jot_networks', $jotnets);
641 ### src/Core/Worker.php
643 Addon::callHooks("proc_run", $arr);
645 ### src/Util/Emailer.php
647 Addon::callHooks('emailer_send_prepare', $params);
648 Addon::callHooks("emailer_send", $hookdata);
652 Addon::callHooks('generate_map', $arr);
653 Addon::callHooks('generate_named_map', $arr);
654 Addon::callHooks('Map::getCoordinates', $arr);
656 ### src/Util/Network.php
658 Addon::callHooks('avatar_lookup', $avatar);
660 ### src/Util/ParseUrl.php
662 Addon::callHooks("getsiteinfo", $siteinfo);
664 ### src/Protocol/DFRN.php
666 Addon::callHooks('atom_feed_end', $atom);
667 Addon::callHooks('atom_feed_end', $atom);
671 callAddonHooks("postprocess_liveupdate");