Hooks

Hooks allow plugins/addons to "hook into" the code at many points and alter the behaviour or otherwise perform independent actions when an activity takes place or when certain data structures are accessed. There are many hooks which allow you to tie into the software at most any point and do something slightly different than the default thing. These hooks are passed two variables. The first is the App structure which contains details about the entire state of the page request as we build the resulting page. The second is unique to the specific hook that is called and provides specific detail about what is happening in the software at the time the hook is invoked.

Generated index of all hooks and the files which call them

module_mod_aftercontent
    General purpose hook for any module, executed after mod_content(). Replace 'module' with module name, e.g. 'photos_mod_aftercontent'.

module_mod_content
    General purpose hook for any module, executed before mod_content(). Replace 'module' with module name, e.g. 'photos_mod_content'.

module_mod_init
    General purpose hook for any module, executed before mod_init(). Replace 'module' with module name, e.g. 'photos_mod_init'.

module_mod_post
    General purpose hook for any module, executed before mod_post(). Replace 'module' with module name, e.g. 'photos_mod_post'.

about_hook
    Called from the siteinfo page

accept_follow
    Called when accepting a connection (friend request)

account_downgrade
    Called when an account has expired, indicating a potential downgrade to "basic" service class

account_settings
    Called when generating the account settings form

account_settings_post
    Called when posting from the account settings form

activity_filter
    Called when generating the list of filters for the network page

activity_mapper
    Called when determining the activity type for transmission.

activity_decode_mapper
    Called when determining the activity type for transmission.

activity_obj_mapper
    Called when determining the object type for transmission.

activity_obj_decode_mapper
    Called when determining the object type for transmission.

activity_order
    Called when generating the list of order options for the network page

addon_app_installed_filter
    Called when determining whether an addon_app is installed

activity_received
    Called when an activity (post, comment, like, etc.) has been received from a zot source

admin_aside
    Called when generating the admin page sidebar widget

affinity_labels
    Used to generate alternate labels for the affinity slider.

api_perm_is_allowed
    Called when perm_is_allowed() is executed from an API call.

app_destroy
    Called when an app is deleted

app_installed_filter
    Called when determining whether an app is installed

app_menu
    Called when generating the app_menu dropdown (may be obsolete)

attach_delete
    Called when attachments are deleted from the attach table

atom_author
    Called when generating an author or owner element for an Atom ActivityStream feed

atom_entry
    Called when generating each item entry of an Atom ActivityStreams feed

atom_feed
    Called when generating an Atom ActivityStreams feed

atom_feed_end
    Called when generation of an Atom ActivityStreams feed is completed

attach_upload_file
    Called when uploading a file

authenticate
    Can provide alternate authentication mechanisms

author_is_pmable
    Called from the thread action menu to determine if we can send private mail to the post author

bb2diaspora
    called when converting bbcode to markdown

bbcode
    Called at end of converting bbcode to HTML

bbcode_filter
    Called when beginning to convert bbcode to HTML

bb_translate_video
    Called when extracting embedded services from bbcode video elements (rarely used)

build_pagehead
    Called when creating the HTML page header

can_comment_on_post
    Called when deciding whether or not to present a comment box for a post

change_channel
    Called when logging in to a channel (either during login or afterward through the channel manager)

channel_remove
    Called when removing a channel

channel_links
    Called when generating the Link: HTTP header for a channel

channel_settings
    Called when displaying the channel settings page

chat_message
    Called to create a chat message.

chat_post
    Called when a chat message has been posted

check_account_email
    Validate the email provided in an account registration

check_account_invite
    Validate an invitation code when using site invitations

check_account_password
    Used to provide policy control over account passwords (minimum length, character set inclusion, etc.)

check_channelallowed
    Used to over-ride or bypass the channel black/white block lists

check_siteallowed
    Used to over-ride or bypass the site black/white block lists

collect_public_recipients
    Used to establish a list of recipients to send a public message to.

comment_buttons
    Called when rendering the edit buttons for comments

comments_are_now_closed
    Called when deciding whether or not to present a comment box for a post

connect_premium
    Called when connecting to a premium channel

connection_remove
    Called when deleting/removing a connection

connector_settings
    Called when posting to the features/addon settings page

construct_page
    General purpose hook to provide content to certain page regions. Called when constructing the Comanche page.

contact_block_end
    Called when generating the sidebar "Connections" widget

contact_edit
    Called when editing a connection via connedit

contact_edit_post
    Called when posting to connedit

contact_select_options
    Deprecated/unused

content_security_policy
    Called prior to output of the Content-Security-Policy header

conversation_start
    Called in the beginning of rendering a conversation (message or message collection or stream)

cover_photo_content_end
    Called after a cover photo has been uplaoded

create_identity
    Called when creating a channel

cron
    Called when scheduled tasks (poller) is executed

cron_daily
    Called when daily scheduled tasks are executed

cron_weekly
    Called when weekly scheduled tasks are executed

crypto_methods
    Called when generating a list of crypto algorithms in the locally preferred order

daemon_addon
    Called when invoking the extensible background daemon

daemon_master_release
    Called at the start of processing \Zotlabs\Daemon\Master::Release()

directory_item
    Called when generating a directory listing for display

discover_channel_webfinger
    Called when performing a webfinger lookup

display_item
    Called for each item being displayed in a conversation thread

display_settings
    Called from settings module when displaying the 'display settings' section

display_settings_post
    Called when posting from the settings module 'display settings' form

donate_contributors
    called by the 'donate' addon when generating a list of donation recipients

donate_plugin
    called by the 'donate' addon

donate_sponsors
    called by the 'donate' addon

dreport_is_storable
    called before storing a dreport record to determine whether to store it

dreport_process
    called for each valid delivery report

dropdown_extras
    Add additional items to the dropdown cog when item/threads are displayed.

drop_item
    called when an 'item' is removed

encode_object
    called when encoding an object for transmission.

enotify
    called before any notification

enotify_mail
    called when sending a notification email

enotify_store
    called when storing a notification record

enotify_store_end
    called after a notification record has been stored

event_created
    called when an event record is created

event_store_event
    called when an event record is created or updated

event_updated
    called when an event record is modified

externals_url_select
    called when generating a list of random sites to pull public posts from

feature_enabled
    called when 'feature_enabled()' is used

feature_settings
    called from settings page when visiting 'addon/feature settings'

feature_settings_post
    called from settings page when posting from 'addon/feature settings'

fetch_and_store
    called to allow filtering of 'decoded' items before storage.

file_thumbnail
    called when generating thumbnail images for cloud page in 'view tiles' mode

follow
    called when a follow operation takes place

follow_from_feed
    called when a follow operation takes place on an RSS feed

follow_allow
    called before storing the results of a follow operation

gender_selector
    called when creating the 'gender' drop down list (advanced profile)

gender_selector_min
    called when creating the 'gender' drop down list (normal profile)

generate_map
    called to generate the HTML for displaying a map location by coordinates

generate_named_map
    called to generate the HTML for displaying a map location by text location

get_all_api_perms
    Called when retrieving the permissions for API uses

get_all_perms
    called when get_all_perms() is used

get_best_language
    called when choosing the preferred language for the page

get_default_export_sections
    Called to get the default list of functional data groups to export in identity_basic_export()

get_features
    Called when get_features() is called

get_photo
    Called when photo content (except for profile photos) is fetched in mod_photo

get_profile_photo
    Called when local profile photo content is fetched in mod_photo

get_role_perms
    Called when get_role_perms() is called to obtain permissions for named permission roles

global_permissions
    Called when the global permissions list is generated

home_content
    Called from mod_home to replace the content of the home page

home_init
    Called from the home page home_init() function

hostxrd
    Called when generating .well-known/hosts-meta for "old webfinger" (used by Diaspora protocol)

html2bb_video
    Called when using the html2bbcode translation to handle embedded media

html2bbcode
    Called when using the html2bbcode translation

identity_basic_export
    Called when exporting a channel's basic information for backup or transfer

import_author_xchan
    Called when looking up an author of a post by xchan_hash to ensure they have an xchan record on our site

import_channel
    Called when importing a channel from a file or API source

import_directory_profile
    Called when processing delivery of a profile structure from an external source (usually for directory storage)

import_xchan
    Called when processing the result of zot_finger() to store the result

item_photo_menu
    Called when generating the list of actions associated with a displayed conversation item

item_store
    Called when item_store() stores a record of type item

item_stored
    Called after item_store() has stored a record of type item in the database.

item_custom
    Called before item_store() stores a record of type item (allowing addons to process ITEM_TYPE_CUSTOM items).

item_store_update
    Called when item_store_update() is called to update a stored item.

item_stored_update
    Called after item_store_update() has updated a stored item.

item_translate
    Called from item_store and item_store_update after the post language has been autodetected

jot_networks
    Called to generate the list of additional post plugins to enable from the ACL form

jot_tool
    Deprecated and possibly obsolete. Allows one to add action buttons to the post editor.

jot_tpl_filter
    Called to filter template vars before replacement in jot.tpl.

jot_header_tpl_filter
    Called to filter template vars before replacement in jot_header.tpl.

legal_webbie
    Called to validate a channel address

legal_webbie_text
    Provides an explanation of text/character restrictions for legal_webbie()

load_pdl
    Called when we load a PDL file or description

local_dir_update
    Called when processing a directory update from a channel on the directory server

location_move
    Called when a new location has been provided to a UNO channel (indicating a move rather than a clone)

logged_in
    Called when authentication by any means has succeeeded

logger
    Called when making an entry to the application logfile

logging_out
    Called when logging out

login_hook
    Called when generating the login form

magic_auth
    Called when processing a magic-auth sequence

markdown_to_bb
    Called when processing markdown conversion

match_webfinger_location
    Called when processing webfinger requests

magic_auth_openid_success
    Called when a magic-auth was successful due to openid credentials

magic_auth_success
    Called when a magic-auth was successful

main_slider
    Called when generating the affinity tool

marital_selector
    Called when generating the list of choices for the 'marital status' profile dropdown (advanced profile)

marital_selector_min
    Called when generating the list of choices for the 'marital status' profile dropdown (normal profile)

module_loaded
    Called when a module has been successfully locate to server a URL request

mood_verbs
    Called when generating the list of moods

nav
    Called when generating the navigation bar

network_content_init
    Called when loading cntent for the network page

network_ping
    Called during a ping request

network_to_name
    Deprecated

notifier_end
    Called when a delivery loop has completed

notifier_hub
    Called when a hub is delivered

notifier_normal
    Called when the notifier is invoked for a 'normal' delivery

notifier_process
    Called when the notifier is processing a message/event

obj_verbs
    Called when creating the list of verbs available for profile "things".

oembed_action
    Called when deciding if an oembed url is to be filter, blocked, or approved

oembed_probe
    Called when performing an oembed content lookup

other_encapsulate
    Called when encrypting content for which the algorithm is unknown (see also crypto_methods)

other_unencapsulate
    Called when decrypting content for which the algorithm is unknown (see also crypto_methods)

page_content_top
    Called when we generate a webpage (before calling the module content function)

page_end
    Called after we have generated the page content

page_header
    Called when generating the navigation bar

page_meta
    Called when generating the meta data in the page header.

parse_atom
    Called when parsing an atom/RSS feed item

parse_link
    Called when probing a URL to generate post content from it

pdl_selector
    Called when creating a layout selection in a form

perm_is_allowed
    Called during perm_is_allowed() to determine if a permission is allowed for this channel and observer

permissions_create
    Called when an abook entry (connection) is created

permissions_update
    Called when a permissions refresh is transmitted

permit_hook
    Called before a registered hook is actually executed to determine if it should be allowed or blocked

personal_xrd
    Called when generating the personal XRD for "old webfinger" (Diaspora)

photo_post_end
    Called after uploading a photo

photo_upload_begin
    Called when attempting to upload a photo

photo_upload_end
    Called when a photo upload has been processed

photo_upload_file
    Called to generate alternate filenames for an upload

photo_upload_form
    Called when generating a photo upload form

photo_view_filter
    Called before the data is handed over to the photo_view template

poke_verbs
    Called when generating the list of actions for "poke" module

post_local
    Called when an item has been posted on this machine via mod/item.php (also via API)

post_local_end
    Called after a local post operation has completed

post_local_start
    Called when a local post operation is commencing

post_mail
    Called when a mail message has been composed

post_mail_end
    Called when a mail message has been delivered

post_remote
    Called when an activity arrives from another site

post_remote_end
    Called after processing a remote post

post_remote_update
    Called when processing a remote post that involved an edit or update

post_remote_update_end
    Called after processing a remote post that involved an edit or update

prepare_body
    Called when generating the HTML for a displayed conversation item

prepare_body_final
    Called after generating the HTML for a displayed conversation item

prepare_body_init
    Called before generating the HTML for a displayed conversation item

privacygroup_extras
    Called before generating the HTML for the Privacy Group edit options

privacygroup_extras_delete
    Called after privacy group is dropped.

privacygroup_extras_post
    Called when privacy group edit form is submitted.

proc_run
    Called when invoking PHP sub processes

process_channel_sync_delivery
    Called when accepting delivery of a 'sync packet' containing structure and table updates from a channel clone

profile_advanced
    Called when generating an advanced profile page

profile_edit
    Called when editing a profile

profile_photo_content_end
    Called when changing a profile photo

profile_post
    Called when posting an edited profile

profile_sidebar
    Called when generating the 'channel sidebar' or mini-profile

profile_sidebar_enter
    Called before generating the 'channel sidebar' or mini-profile

queue_deliver
    Called when delivering a queued message

register_account
    Called when an account has been created

render_location
    Called to generate an ineractive inline map

replace_macros
    Called before invoking the template processor

reverse_magic_auth
    Called before invoking reverse magic auth to send you to your own site to authenticate on this site

settings_account
    Called when generating the account settings form

settings_form
    Called when generating the channel settings form

settings_post
    Called when posting from the channel settings form

sexpref_selector
    Called when generating a dropdown of sexual preference (advanced profile)

sexpref_selector_min
    Called when generating a dropdown of sexual preference (normal profile)

smilie
    Called when translating emoticons

status_editor
    Called when generating the status_editor.

stream_item
    Called for each item which is rendered for viewing via conversation()

system_app_installed_filter
    Called when determining whether a system app is installed

tagged
    Called when a delivery is processed which results in you being tagged

thumbnail
    Called when generating thumbnails for cloud storage 'tile' view

update_unseen
    Called prior to automatically marking items seen which were loaded in the browser

validate_channelname
    Used to validate the names used by a channel

webfinger
    Called when visiting the webfinger (RFC7033) service

well_known
    Called when accessing the '.well-known' special site addresses

wiki_preprocess
    Called before markdown/bbcode processors are run for wiki pages

zot_best_algorithm
    Called when negotiating crypto algorithms with remote sites

zid
    Called when adding the observer's zid to a URL

zid_init
    Called when authenticating a visitor who has used zid

zot_finger
    Called when a zot-info packet has been requested (this is our webfinger discovery mechanism)