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InitializePlugin: a chance to initialize a plugin in a complete environment

CleanupPlugin: a chance to cleanup a plugin at the end of a program

StartActionExecute: Right before the "prepare" call of the current Action
- $action:  the current Action object
- &$args:   array of arguments, referenced so you can modify the array

EndActionExecute:   Right after the "handle" call of the current Action
- $action:      the current Action object

StartPrimaryNav: Showing the primary nav menu
- $action: the current action

EndPrimaryNav: At the end of the primary nav menu
- $action: the current action

StartSecondaryNav: Showing the secondary nav menu
- $action: the current action

EndSecondaryNav: At the end of the secondary nav menu
- $action: the current action

StartShowStyles: Showing Style links; good place to add UA style resets
- $action: the current action

EndShowStyles: End showing Style links; good place to add custom styles
- $action: the current action

StartShowStylesheets: Showing stylesheet links
- $action: the current action

EndShowStylesheets: End showing stylesheet links;  good place to add handheld or JavaScript dependant styles
- $action: the current action

StartShowUAStyles: Showing custom User-Agent style links
- $action: the current action

EndShowUAStyles: End showing custom User-Agent links; good place to add user-agent (e.g., filter, -webkit, -moz) specific styles
- $action: the current action

StartShowScripts: Showing JavaScript links
- $action: the current action

EndShowScripts: End showing JavaScript links; good place to add custom links
- $action: the current action

StartShowJQueryScripts: Showing JQuery script links
- $action: the current action

EndShowJQueryScripts: End showing JQuery script links
- $action: the current action

StartShowStatusNetScripts: Showing StatusNet script links (use this to link to a CDN or something)
- $action: the current action

EndShowStatusNetScripts: End showing StatusNet script links
- $action: the current action

StartShowSections: Start the list of sections in the sidebar
- $action: the current action

EndShowSections: End the list of sections in the sidebar
- $action: the current action

StartShowHeader: Showing before the header container
- $action: the current action

EndShowHeader: Showing after the header container
- $action: the current action

StartShowFooter: Showing before the footer container
- $action: the current action

EndShowFooter: Showing after the footer container
- $action: the current action

StartShowContentBlock: Showing before the content container
- $action: the current action

EndShowContentBlock: Showing after the content container
- $action: the current action

StartShowAside: Showing before the Aside container
- $action: the current action

EndShowAside: Showing after the Aside container
- $action: the current action

StartShowNoticeFormData: Showing before the notice form data
- $action: the current action

EndShowNoticeFormData: Showing after the notice form data
- $action: the current action

StartNoticeSave: before inserting a notice (good place for content filters)
- $notice: notice being saved (no ID or URI)

EndNoticeSave: after inserting a notice and related code
- $notice: notice that was saved (with ID and URI)

StartShowLocalNavBlock: Showing the local nav menu
- $action: the current action

EndShowLocalNavBlock: At the end of the local nav menu
- $action: the current action

StartShowHTML: Chance to set document headers (e.g., content type, charset, language), DOCTYPE and html element properties
- $action: the current action

EndShowHTML: Showing after the html element
- $action: the current action

StartPublicGroupNav: Showing the public group nav menu
- $menu: the menu widget; use $menu->action for output

EndPublicGroupNav: At the end of the public group nav menu
- $menu: the menu widget; use $menu->action for output

StartSubGroupNav: Showing the subscriptions group nav menu
- $menu: the menu widget; use $menu->action for output

EndSubGroupNav: At the end of the subscriptions group nav menu
- $menu: the menu widget; use $menu->action for output

StartInitializeRouter: Before the router instance has been initialized; good place to add routes
- $m: the Net_URL_Mapper that has just been set up

RouterInitialized: After the router instance has been initialized
- $m: the Net_URL_Mapper that has just been set up

StartLogout: Before logging out
- $action: the logout action

EndLogout: After logging out
- $action: the logout action

ArgsInitialize: After the argument array has been initialized
- $args: associative array of arguments, can be modified

StartAddressData: Allows the site owner to provide additional information about themselves for contact (e.g., tagline, email, location)
- $action: the current action

EndAddressData: At the end of <address>
- $action: the current action

StartShowSiteNotice: Before showing site notice
- $action: the current action

EndShowSiteNotice: After showing site notice
- $action: the current action

StartLoginGroupNav: Before showing the login and register navigation menu
- $action: the current action

EndLoginGroupNav: After showing the login and register navigation menu
- $action: the current action

StartAccountSettingsNav: Before showing the account settings menu
- $action: the current action

EndAccountSettingsNav: After showing the account settings menu
- $action: the current action

StartAccountSettingsProfileMenuItem: Before showing the Profile menu item
- $widget: AccountSettingsNav instance being shown

EndAccountSettingsProfileMenuItem: After showing the Profile menu item
- $widget: AccountSettingsNav instance being shown

StartAccountSettingsAvatarMenuItem: Before showing the Avatar menu item
- $widget: AccountSettingsNav instance being shown

EndAccountSettingsAvatarMenuItem: After showing the Avatar menu item
- $widget: AccountSettingsNav instance being shown

StartAccountSettingsPasswordMenuItem: Before showing the Password menu item
- $widget: AccountSettingsNav instance being shown

EndAccountSettingsPasswordMenuItem: After showing the Password menu item
- $widget: AccountSettingsNav instance being shown

StartAccountSettingsEmailMenuItem: Before showing the Email menu item
- $widget: AccountSettingsNav instance being shown

EndAccountSettingsEmailMenuItem: After showing the Email menu item
- $widget: AccountSettingsNav instance being shown

StartAccountSettingsDesignMenuItem: Before showing the Design menu item
- $widget: AccountSettingsNav instance being shown

EndAccountSettingsDesignMenuItem: After showing the Design menu item
- $widget: AccountSettingsNav instance being shown

StartAccountSettingsOtherMenuItem: Before showing the Other menu item
- $widget: AccountSettingsNav instance being shown

EndAccountSettingsOtherMenuItem: After showing the Other menu item
- $widget: AccountSettingsNav instance being shown

Autoload: When trying to autoload a class
- $cls: the class being sought. A plugin might require_once the file for the class.

SensitiveAction: determines if an action is 'sensitive' and should use SSL
- $action: name of the action, like 'login'
- $sensitive: flag for whether this is a sensitive action

LoginAction: determines if an action is a 'login' action (OK for public view in private mode)
- $action: name of the action, like 'register'
- $login: flag for whether this is a login action

StartShowHead: called before showing the <head> element and children
- $action: action object being show

EndShowHead: called after showing the <head> element (and </head>)
- $action: action object being shown

StartShowBody: called before showing the <body> element and children
- $action: action object being shown

EndShowBody: called after showing the <body> element (and </body>)
- $action: action object being shown

StartPersonalGroupNav: beginning of personal group nav menu
- $menu: Menu list object being shown
- $target: Profile for whom it is shown
- $scoped: Profile of currently logged in user (or null)

EndPersonalGroupNav: end of personal group nav menu (good place to add a menu item)
- $action: action object being shown

StartGroupGroupNav: Showing the group nav menu
- $action: the current action

EndGroupGroupNav: At the end of the group nav menu
- $action: the current action

StartEndHTML: just before the </html> tag
- $action: action object being shown

EndEndHTML: just after the </html> tag
- $action: action object being shown

FinalAction: After prepare() (and possible handle) in Action class.
- $status: result of "prepare" call on action
- $action: Action that is currently running

StartShowDesign: just before showing a site, user, or group design
- $action: action object being shown

EndShowDesign: just after showing a site, user, or group design
- $action: action object being shown

StartShowExportData: just before showing the <div> with export data (feeds)
- $action: action object being shown

EndShowExportData: just after showing the <div> with export data (feeds)
- $action: action object being shown

StartShowNoticeItem: just before showing the notice item
- $item: The NoticeListItem object being shown

EndShowNoticeItem: just after showing the notice item
- $item: the NoticeListItem object being shown

StartShowNoticeItemNotice: just before outputting the "top" notice part of a NoticeListItem to HTML
- $item: The NoticeListItem object being shown

EndShowNoticeItemNotice: just after outputting the "top" notice part of a NoticeListItem to HTML
- $item: The NoticeListItem object being shown

StartShowNoticeContent: just before outputting the content part of a Notice
- $stored: The Notice object
- $out: HTMLOutputter for writing to
- $scoped: optional Profile object for permission scoping

EndShowNoticeContent: just after outputting the content part of a Notice, plugins must call this manually
- $stored: The Notice object
- $out: HTMLOutputter for writing to
- $scoped: optional Profile object for permission scoping

StartShowNoticeInfo: just before showing notice info
- $item: The NoticeListItem object being shown

EndShowNoticeInfo: just after showing notice info
- $item: The NoticeListItem object being shown

StartShowNoticeOptions: just before showing notice options like fave, repeat, etc.
- $item: the NoticeListItem object being shown

EndShowNoticeOptions: just after showing notice options like fave, repeat, etc.
- $item: the NoticeListItem object being shown

StartShowPageNotice: just before showing the page notice (instructions or error)
- $action: action object being shown

EndShowPageNotice: just after showing the page notice (instructions or error)
- $action: action object being shown

StartShowPageTitle: just before showing the main h1 title of a page (only for registration)
- $action: action object being shown

StartProfileFormData: just before showing text entry fields on profile settings page
- $action: action object being shown

EndProfileFormData: just after showing text entry fields on profile settings page
- $action: action object being shown

StartProfileSaveForm: before starting to save a profile settings form
- $action: action object being shown

EndProfileSaveForm: after saving a profile settings form (after commit, no profile or user object!)
- $action: action object being shown

StartEmailFormData: just before showing form input fields on email settings page
- $action: Action object being shown
- $scoped: Profile for whom settings are being configured

EndEmailFormData: just after showing form input fields on email settings page
- $action: action object being shown
- $scoped: Profile for whom settings are being configured

StartEmailSaveForm: before starting to save a email settings form
- $action: action object being shown
- $scoped: Profile user having their email settings saved

EndEmailSaveForm: after saving a email settings form (after commit)
- $action: action object being shown
- $scoped: Profile user having their email settings saved

StartRegistrationFormData: just before showing text entry fields on registration page
- $action: action object being shown

EndRegistrationFormData: just after showing text entry fields on registration page
- $action: action object being shown

StartRegistrationTry: before validating and saving a new user
- $action: action object being shown

EndRegistrationTry: after saving a new user (note: no profile or user object!)
- $action: action object being shown

StartAvatarFormData: before displaying avatar form
- $action: action object being shown

EndAvatarFormData: after displaying avatar form
- $action: action object being shown

StartAvatarSaveForm: before saving the avatar
- $action: action object being shown

EndAvatarSaveForm: after saving the avatar
- $action: action object being shown

StartNewQueueManager: before trying to start a new queue manager; good for plugins implementing new queue manager classes
- $qm: empty queue manager to set

RedirectToLogin: event when we force a redirect to login (like when going to a settings page on a remembered login)
- $action: action object being shown
- $user: current user

StartLoadDoc: before loading a help doc (hook this to show your own documentation)
- $title: title of the document
- $output: HTML output to show

EndLoadDoc: after loading a help doc (hook this to modify other documentation)
- $title: title of the document
- $output: HTML output to show

StartApiRss: after the rss <channel> element is started
- $action: action object being shown

StartApiAtom: after the <feed> element is started
- $action: action object being shown

StartEnqueueNotice: about to add a notice to the queues (good place to add a new transport)
- $notice: the notice being added
- &$transports: modifiable list of transports (as strings) to queue for

EndEnqueueNotice: after adding a notice to the queues
- $notice: the notice being added
- $transports: modifiable list of transports to use

UnqueueHandleNotice: Handle a notice when no queue manager is available
- $notice: the notice to handle
- $queue: the "queue" that is being executed

GetValidDaemons: Just before determining which daemons to run
- &$daemons: modifiable list of daemon scripts to run, filenames relative to scripts/

HandleQueuedNotice: Handle a queued notice at queue time (or immediately if no queue)
- &$notice: notice to handle

StartHtmlElement: Reight before outputting the HTML element - allows plugins to add namespaces
- $action: the current action
- &$attrs: attributes for the HTML element

EndHtmlElement: Right after outputting the HTML element
- $action: the current action
- &$attrs: attributes for the HTML element

StartShowHeadElements: Right after the <head> tag
- $action: the current action

EndShowHeadElements: Right before the </head> tag; put <script>s here if you need them in <head>
- $action: the current action

CheckSchema: chance to check the schema

StartProfileRemoteSubscribe: Before showing the link to remote subscription
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfileRemoteSubscribe: After showing the link to remote subscription
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartGroupSubscribe: Before showing the link to remote subscription
- $action: the current action
- $group: the group being shown

EndGroupSubscribe: After showing the link to remote subscription
- $action: the current action
- $group: the group being shown

StartProfilePageProfileSection: Starting to show the section of the
                              profile page with the actual profile data;
                              hook to prevent showing the profile (e.g.)
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageProfileElements: inside the section, before the first
                               element; prepend elements here
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageProfileElements: inside the section, after the last element;
                             append elements here
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageProfileSection: After showing the section of the profile
                            page with the profile elements
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageActionsSection: Starting to show the section of the
                                    profile page with action links; hook
                                    to hide them (for example)
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageActionsElements: inside the list, before the first
                                     element; prepend elements here
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageActionsElements: inside the list, after the last element;
                                   append elements here
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageActionsSection: After showing the section of the profile
                                  page with the entity actions
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageAvatar: before showing the avatar on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageAvatar: after showing the avatar on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageNickname: before showing the nickname on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageNickname: after showing the nickname on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageFullName: before showing the fullname on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageFullName: after showing the fullname on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageLocation: before showing the location on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageLocation: after showing the location on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageHomepage: before showing the homepage link on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageHomepage: after showing the homepage on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageBio: before showing the bio on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageBio: after showing the bio on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfilePageProfileTags: before showing the tags on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

EndProfilePageProfileTags: after showing the tags on the profile page
- $userprofile: UserProfile widget
- &$profile: the profile being shown

StartProfileList: when starting a list of profiles (before <ul>)
- $profilelist: ProfileList widget, with $profile, $action, and $out

EndProfileList: when ending a list of profiles (after </ul>)
- $profilelist: ProfileList widget

StartProfileListItem: when starting to show a profile list item
- $item: ProfileListItem widget

EndProfileListItem: after showing a profile list item
- $item: ProfileListItem widget

StartProfileListItemProfile: the profile data part of the item
- $item: ProfileListItem widget

EndProfileListItemProfile: the profile data part of the item
- $item: ProfileListItem widget

StartProfileListItemActions: the actions (buttons) for an item
- $item: ProfileListItem widget

EndProfileListItemActions: the actions (buttons) for an item
- $item: ProfileListItem widget

StartProfileListItemProfileElements: inside the <div>
- $item: ProfileListItem widget

EndProfileListItemProfileElements: inside the <div>
- $item: ProfileListItem widget

StartProfileListItemAvatar: Showing a profile list avatar
- $item: ProfileListItem widget

EndProfileListItemAvatar: Showing a profile list avatar
- $item: ProfileListItem widget

StartProfileListItemFullName: Showing the profile list full name
- $item: ProfileListItem widget

EndProfileListItemFullName: Showing the profile list full name
- $item: ProfileListItem widget

StartProfileListItemLocation: Showing the profile list location
- $item: ProfileListItem widget

EndProfileListItemLocation: Showing the profile list location
- $item: ProfileListItem widget

StartProfileListItemHomepage: Showing the profile list homepage
- $item: ProfileListItem widget

EndProfileListItemHomepage: Showing the profile list homepage
- $item: ProfileListItem widget

StartProfileListItemBio: Showing the profile list bio
- $item: ProfileListItem widget

EndProfileListItemBio: Showing the profile list bio
- $item: ProfileListItem widget

StartProfileListItemActionElements: Showing the profile list actions (prepend a button here, or replace all buttons)
- $item: ProfileListItem widget

EndProfileListItemActionElements: Showing profile list actions (append a button here)
- $item: ProfileListItem widget

StartUserXRDS: Start XRDS output (right after the opening XRDS tag)
- $action: the current action
- &$xrdsoutputter - XRDSOutputter object to write to

EndUserXRDS: End XRDS output (right before the closing XRDS tag)
- $action: the current action
- &$xrdsoutputter - XRDSOutputter object to write to

StartPublicXRDS: Start XRDS output (right after the opening XRDS tag)
- $action: the current action
- &$xrdsoutputter - XRDSOutputter object to write to

EndPublicXRDS: End XRDS output (right before the closing XRDS tag)
- $action: the current action
- &$xrdsoutputter - XRDSOutputter object to write to

StartCheckPassword: Check a username/password
- $nickname: The nickname to check
- $password: The password to check
- &$authenticatedUser: set to User object if credentials match a user.

EndCheckPassword: After checking a username/password pair
- $nickname: The nickname that was checked
- $password: The password that was checked
- $authenticatedUser: User object if credentials match a user, else null.

StartChangePassword: Before changing a password
- Profile $target: The profile of the User that is changing password
- $oldpassword: the user's old password
- $newpassword: the desired new password

EndChangePassword: After changing a password
- Profile $target: The profile of the User that just changed its password

StartHashPassword: Generate a hashed version of the password (like a salted crypt)
- &$hashed: Hashed version of the password, later put in the database
- $password: The password that should be hashed
- $profile: Profile that this password and hash belongs to. Can be null.

StartSetUser: Before setting the currently logged in user
- $user: user

EndSetUser: After setting the currently logged in user
- $user: user

StartSetApiUser: Before setting the current API user
- &$user: user, can be set during event handling (return false to stop processing)

EndSetApiUser: After setting the current API user
- $user: user, only called if this is an actual user

StartHasRole: Before determing if the a profile has a given role
- $profile: profile in question
- $name: name of the role in question
- &$has_role: does this profile have the named role?

EndHasRole: Before determing if the a profile has a given role
- $profile: profile in question
- $name: name of the role in question
- $has_role: does this profile have the named role?

UserDeleteRelated: Specify additional tables to delete entries from when deleting users
- $user: User object
- &$related: array of DB_DataObject class names to delete entries on matching user_id.

GetUrlShorteners: Specify URL shorteners that are available for use
- &$shorteners: append your shortener to this array like so: $shorteners[shortenerName]=array('display'=>display, 'freeService'=>boolean)

StartShortenUrl: About to shorten a URL
- $url: url to be shortened
- $shortenerName: name of the requested shortener
- &$shortenedUrl: short version of the url

EndShortenUrl: After a URL has been shortened
- $url: url to be shortened
- $shortenerName: name of the requested shortener
- $shortenedUrl: short version of the url

StartCssLinkElement: Before a <link rel="stylesheet"..> element is written
- $action
- &$src
- &$theme
- &$media

EndCssLinkElement: After a <link rel="stylesheet"..> element is written
- $action
- $src
- $theme
- $media

StartStyleElement: Before a <style...> element is written
- $action
- &$code
- &$type
- &$media

EndStyleElement: After a <style...> element is written
- $action
- $code
- $type
- $media

StartScriptElement: Before a <script...> element is written
- $action
- &$src
- &$type

EndScriptElement: After a <script...> element is written
- $action
- $src
- $type

StartInlineScriptElement: Before a <script...> element is written
- $action
- &$code
- &$type

EndInlineScriptElement: After a <script...> element is written
- $action
- $code
- $type

StartLog: Before writing to the logs
- &$priority
- &$msg
- &$filename

EndLog: After writing to the logs
- $priority
- $msg
- $filename

StartBlockProfile: when we're about to block
- $user: the person doing the block
- $profile: the person getting blocked, can be remote

EndBlockProfile: when a block has succeeded
- $user: the person doing the block
- $profile: the person blocked, can be remote

StartUnblockProfile: when we're about to unblock
- $user: the person doing the unblock
- $profile: the person getting unblocked, can be remote

EndUnblockProfile: when an unblock has succeeded
- $user: the person doing the unblock
- $profile: the person unblocked, can be remote

StartSubscribe: when a subscription is starting
- $profile: Profile that is subscribing
- $other: Profile that is being subscribed to

EndSubscribe: when a subscription is finished
- $profile: Profile that is subscribing
- $other: Profile that is being subscribed to

StartUnsubscribe: when an unsubscribe is starting
- $profile: Profile that is unsubscribing
- $other: Profile that is being unsubscribed from

EndUnsubscribe: when an unsubscribe is done
- $profile: Profile that is unsubscribing
- $other: Profile that is being unsubscribed from

StartJoinGroup: when a user is joining a group
- $group: the group being joined
- $profile: the local or remote user joining

EndJoinGroup: when a user finishes joining a group
- $group: the group being joined
- $profile: the local or remote user joining

StartLeaveGroup: when a user is leaving a group
- $group: the group being left
- $profile: the local or remote user leaving

EndLeaveGroup: when a user has left a group
- $group: the group being left
- $profile: the local or remote user leaving

StartShowContentLicense: Showing the default license for content
- $action: the current action

EndShowContentLicense: Showing the default license for content
- $action: the current action

GetImTransports: Get IM transports that are available
- &$transports: append your transport to this array like so: $transports[transportName]=array('display'=>display)

NormalizeImScreenname: Normalize an IM screenname
- $transport: transport the screenname is on
- &$screenname: screenname to be normalized

ValidateImScreenname: Validate an IM screenname
- $transport: transport the screenname is on
- $screenname: screenname to be validated
- $valid: is the screenname valid?

SendImConfirmationCode: Send a confirmation code to confirm a user owns an IM screenname
- $transport: transport the screenname exists on
- $screenname: screenname being confirmed
- $code: confirmation code for confirmation URL
- $user: user requesting the confirmation

StartUserRegister: When a new user is being registered
- $profile: Profile object with new profile data (no ID yet)

EndUserRegister: When a new user has been registered
- $profile: Profile object with new profile data

StartRobotsTxt: Before outputting the robots.txt page
- &$action: RobotstxtAction being shown

EndRobotsTxt: After the default robots.txt page (good place for customization)
- &$action: RobotstxtAction being shown

StartGetProfileUri: When determining the canonical URI for a given profile
- $profile: the current profile
- &$uri: the URI

EndGetProfileUri: After determining the canonical URI for a given profile
- $profile: the current profile
- &$uri: the URI

StartGetProfileAcctUri: Get the acct: URI for a Profile (or throw ProfileNoAcctUriException)
- $profile: Profile of user we want to get acct: URI for
- &$acct:   string with the resulting acct: uri

EndGetProfileAcctUri: Last attempts to get the acct: URI for a Profile (or throw ProfileNoAcctUriException)
- $profile: Profile of user we want to get acct: URI for
- &$acct:   string with the resulting acct: uri

StartFindMentions: start finding mentions in a block of text
- $sender: sender profile
- $text: plain text version of the notice
- &$mentions: mentions found so far. Array of arrays; each array
  has 'mentioned' (array of mentioned profiles), 'url' (url to link as),
  'title' (title of the link), 'position' (position of the text to
  replace), 'text' (text to replace)

EndFindMentions: end finding mentions in a block of text
- $sender: sender profile
- $text: plain text version of the notice
- &$mentions: mentions found so far. Array of arrays; each array
  has 'mentioned' (array of mentioned profiles), 'url' (url to link as),
  'title' (title of the link), 'position' (position of the text to
  replace), 'text' (text to replace)

StartShowSubscriptionsContent: before showing the subscriptions content
- $action: the current action

EndShowSubscriptionsContent: after showing the subscriptions content
- $action: the current action

StartShowUserGroupsContent: before showing the user groups content
- $action: the current action

EndShowUserGroupsContent: after showing the user groups content
- $action: the current action

StartShowAllContent: before showing the all (you and friends) content
- $action: the current action

EndShowAllContent: after showing the all (you and friends) content
- $action: the current action

StartShowSubscriptionsMiniList: at the start of subscriptions mini list
- $action: the current action

EndShowSubscriptionsMiniList: at the end of subscriptions mini list
- $action: the current action

StartShowGroupsMiniList: at the start of groups mini list
- $action: the current action

EndShowGroupsMiniList: at the end of groups mini list
- $action: the current action

StartDeleteUserForm: starting the data in the form for deleting a user
- $action: action being shown
- $user: user being deleted

EndDeleteUserForm: Ending the data in the form for deleting a user
- $action: action being shown
- $user: user being deleted

StartDeleteUser: handling the post for deleting a user
- $action: action being shown
- $user: user being deleted

EndDeleteUser: handling the post for deleting a user
- $action: action being shown
- $user: user being deleted

StartNoticeAsActivity: before converting a notice to an activity
- $notice: notice being converted
- &$activity: initially empty activity

EndNoticeAsActivity: after converting a notice to an activity (good time to customize!)
- $notice: notice being converted
- &$activity: activity, now more-or-less full

StartNoticeSaveWeb: before saving a notice through the Web interface
- $action: action being executed (instance of NewNoticeAction)
- &$authorId: integer ID of the author
- &$text: text of the notice
- &$options: additional options (location, replies, etc.)

EndNoticeSaveWeb: after saving a notice through the Web interface
- $action: action being executed (instance of NewNoticeAction)
- $notice: notice that was saved

StartRssEntryArray: at the start of copying a notice to an array
- $notice: the notice being copied
- &$entry: the entry (empty at beginning)

EndRssEntryArray: at the end of copying a notice to an array
- $notice: the notice being copied
- &$entry: the entry, with all the fields filled up

NoticeDeleteRelated: at the beginning of deleting related fields to a notice
- $notice: notice being deleted

FileDeleteRelated: at the beginning of deleting related fields to a File
- $notice: File being deleted

StartShowHeadTitle: when beginning to show the <title> element
- $action: action being shown

EndShowHeadTitle: when done showing the <title>
- $action: action being shown

StartShowPageTitle: when beginning to show the page title <h1>
- $action: action being shown

EndShowPageTitle: when done showing the page title <h1>
- $action: action being shown

StartDeleteOwnNotice: when a user starts to delete their own notice
- $user: the user doing the delete
- $notice: the notice being deleted

EndDeleteOwnNotice: when a user has deleted their own notice
- $user: the user doing the delete
- $notice: the notice being deleted

StartShowFeedLinkList: before showing the feed list in the sidebar
- $action: action being executed
- $feeds: list of feeds to show

EndShowFeedLinkList: after showing the feed list in the sidebar
- $action: action being executed
- $feeds: list of feeds shown

StartShowFeedLink: before showing an individual feed item
- $action: action being executed
- $feed: feed to show

EndShowFeedLink: after showing an individual feed
- $action: action being executed
- $feed: feed to show

StartShowNoticeForm: before showing the notice form (before <form>)
- $action: action being executed

EndShowNoticeForm: after showing the notice form (after <form>)
- $action: action being executed

StartShowEntryForms: microapp entry form tab data
- &$tabs: tab assoc array with 'tag' => (title, href to create new entry)

StartGrantRole: when a role is being assigned
- $profile: profile that will have the role
- $role: string name of the role

EndGrantRole: when a role has been successfully assigned
- $profile: profile that will have the role
- $role: string name of the role

StartRevokeRole: when a role is being revoked
- $profile: profile that will lose the role
- $role: string name of the role

EndRevokeRole: when a role has been revoked
- $profile: profile that lost the role
- $role: string name of the role

StartAtomPubNewActivity: When a new activity comes in through Atom Pub API
- &$activity: received activity
- $profile: profile of the user publishing the entry
- &$notice: notice created; initially null, can be set

EndAtomPubNewActivity: When a new activity comes in through Atom Pub API
- $activity: received activity
- $profile: profile of the user publishing the entry
- $notice: notice that was created

AdminPanelCheck: When checking whether the current user can access a given admin panel
- $name:  Name of the admin panel
- &$isOK: Boolean whether the user is allowed to use the panel

StartAdminPanelNav: Before displaying the first item in the list of admin panels
- $nav The AdminPanelNav widget

EndAdminPanelNav: After displaying the last item in the list of admin panels
- $nav The AdminPanelNav widget

StartActivityObjectFromNotice: When converting a notice to an activity:object
- $notice: The notice being converted
- &$object: The resulting object. Fill this and return false to override defaults.

EndActivityObjectFromNotice: After converting a notice to an activity:object
- $notice: The notice being converted
- &$object: The resulting object. Can be edited

StartActivityObjectFromProfile: When converting a profile to an activity:object
- $profile: The profile being converted
- &$object: The (empty) object. Fill it up and return false to override defaults.

EndActivityObjectFromProfile: After converting a profile to an activity:object
- $profile: The profile being converted
- &$object: The finished object. Can be tweaked

StartActivityObjectFromGroup: When converting a group to an activity:object
- $group: The group being converted
- &$object: The (empty) object. Fill and return false to override.

EndActivityObjectFromGroup:  After converting a group to an activity:object
- $group:  The group being converted
- &$object: The finished object. Tweak as needed.

StartImportActivity: when we start to import an activity
- $user: User to make the author import
- $author: Author of the feed; good for comparisons
- $activity: The current activity
- $trusted: How "trusted" the process is
- &$done: Return value; whether to continue

EndImportActivity: when we finish importing an activity
- $user: User to make the author import
- $author: Author of the feed; good for comparisons
- $activity: The current activity
- $trusted: How "trusted" the process is

StartProfileSettingsActions: when we're showing account-management action list
- $action: Action being shown (use for output)

EndProfileSettingsActions: when we're showing account-management action list
- $action: Action being shown (use for output)

StartOpenNoticeListItemElement: Before the opening <li> of a notice list element
- $nli: The notice list item being shown

EndOpenNoticeListItemElement: After the opening <li> of a notice list element
- $nli: The notice list item being shown

StartCloseNoticeListItemElement: Before the closing </li> of a notice list element
- $nli: The notice list item being shown

EndCloseNoticeListItemElement: After the closing </li> of a notice list element
- $nli: The notice list item being shown

StartGroupEditFormData: Beginning the group edit form entries
- $form: The form widget being shown

EndGroupEditFormData: Ending the group edit form entries
- $form: The form widget being shown

StartGroupSave: After initializing but before saving a group
- &$group: group about to be saved

EndGroupSave: After saving a group, aliases, and first member
- $group: group that was saved

StartInterpretCommand: Before running a command
- $cmd: First word in the string, 'foo' in 'foo argument'
- $arg: Argument, if any, like 'argument' in 'foo argument'
- $user: User who issued the command
- &$result: Resulting command; you can set this!

EndInterpretCommand: Before running a command
- $cmd: First word in the string, 'foo' in 'foo argument'
- $arg: Argument, if any, like 'argument' in 'foo argument'
- $user: User who issued the command
- $result: Resulting command

StartGroupActionsList: Start the list of actions on a group profile page (after <ul>, before first <li>)
- $action: action being executed (for output and params)
- $group: group for the page

EndGroupActionsList: End the list of actions on a group profile page (before </ul>, after last </li>)
- $action: action being executed (for output and params)
- $group: group for the page

StartGroupProfileElements: Start showing stuff about the group on its profile page
- $action: action being executed (for output and params)
- $group: group for the page

EndGroupProfileElements: Start showing stuff about the group on its profile page
- $action: action being executed (for output and params)
- $group: group for the page

StartShowProfileTagContent: When showing a people tag page
- $action: action being executed (for output and params)

EndShowProfileTagContent: After showing the contents of a people tag page
- $action: action being executed (for output and params)

StartShowTaggedProfilesMiniList: at the start of mini list of tagged profiles
- $action: action being executed (for output and params)

EndShowTaggedProfilesMiniList: at the end of mini list of tagged profiles
- $action: action being executed (for output and params)

StartShowProfileTagSubscribersMiniList: at the start of mini list of people tag subscribers
- $action: action being executed (for output and params)

EndShowProfileTagSubscribersMiniList: at the end of mini list of people tag subscribers
- $action: action being executed (for output and params)

StartTagProfileAction: When starting to show profile tagging page
- $action: action being executed (for output and params)
- $profile: profile being tagged

EndTagProfileAction: After showing profile tagging page
- $action: action being executed (for output and params)
- $profile: profile being tagged

StartProfileCompletionSearch: When starting a profile search for autocompletion
- $action: action being executed (for output and params)
- &$profile: result Profile objects
- $search_engine: the search engine

EndProfileCompletionSearch: After search results for profile autocompletion have been found
- $action: profilec completion action
- &$profile: current result Profile objects
- $search_engine: The search engine object

StartShowTagProfileForm: When showing people tagging form
- $action: action being executed (for output and params)
- $profile: profile being tagged

EndShowTagProfileForm: After showing people tagging form
- $action: action being executed (for output and params)
- $profile: profile being tagged

StartSavePeopletags: When starting to save people tags
- $action: action being executed (for output and params)
- $tagstring: string input, a list of tags

EndSavePeopletags: After saving people tags
- $action: action being executed (for output and params)
- $tagstring: string input, a list of tags

StartProfiletagGetUri: when generating the Uri for a people tag
- $profile_list: the people tag, a Profile_list object
- &$uri: the URI

EndProfiletagGetUri: after generating the uri for a people tag
- $profile_list: the people tag, a Profile_list object
- &$uri: the URI

StartUserPeopletagHomeUrl: when generating the homepage url for a people tag
- $profile_list: the people tag, a Profile_list object
- &$url: the URL

EndUserPeopletagHomeUrl: after generating the homepage url for a people tag
- $profile_list: the people tag, a Profile_list object
- &$url: the URL

StartProfiletagPermalink: when generating the permalink url for a people tag
- $profile_list: the people tag, a Profile_list object
- &$url: the URL

EndProfiletagPermalink: after generating the permalink url for a people tag
- $profile_list: the people tag, a Profile_list object
- &$url: the URL

StartTagProfile: when tagging a profile
- $tagger: profile tagging
- $tagged: profile being tagged
- $tag: the tag

EndTagProfile: after tagging a profile
- $newtag: the newly created Profile_tag object

StartUntagProfile: when deleting a people tag
- $ptag: the Profile_tag object being deleted

EndUntagProfile: after deleting a people tag
- $orig: a copy of the deleted Profile_tag object

StartSubscribePeopletag: when subscribing to a people tag
- $peopletag: Profile_list object being subscribed to
- $profile: subscriber's profile

EndSubscribePeopletag: after subscribing to a people tag
- $profile_list: the people tag, a Profile_list object: Profile_list object being subscribed to
- $profile: subscriber's profile

StartUnsubscribePeopletag: when unsubscribing to a people tag
- $profile_list: the people tag, a Profile_list object: Profile_list object being subscribed to
- $profile: subscriber's profile

EndUnsubscribePeopletag: after unsubscribing to a people tag
- $peopletag: Profile_list object being subscribed to
- $profile: subscriber's profile

StartActivityObjectFromPeopletag: while starting to create an ActivityObject from a people tag
- $profile_list: the people tag, a Profile_list object
- &$object: activity object

EndActivityObjectFromPeopletag: after making an ActivityObject from a people tag
- $profile_list: the people tag, a Profile_list object
- &$object: activity object

StartPeopletagGroupNav: Showing the people tag nav menu
- $menu: the menu widget; use $menu->action for output

EndPeopletagGroupNav: after showing the people tag nav menu
- $menu: the menu widget; use $menu->action for output

StartShowPeopletagItem: when showing a people tag
- $widget: PeopletagListItem widget

EndShowPeopletagItem: after showing a people tag
- $widget: PeopletagListItem widget

StartSubscribePeopletagForm: when showing people tag subscription form
- $action: action being executed (for output and params)
- $peopletag: people tag being subscribed to

EndSubscribePeopletagForm: after showing the people tag subscription form
- $action: action being executed (for output and params)
- $peopletag: people tag being subscribed to

StartShowPeopletags: when showing a textual list of people tags
- $widget: PeopletagsWidget; use $widget->out for output
- $tagger: profile of the tagger
- $tagged: profile tagged

EndShowPeopletags: after showing a textual list of people tags
- $widget: PeopletagsWidget; use $widget->out for output
- $tagger: profile of the tagger
- $tagged: profile tagged

StartProfileListItemTags: when showing people tags in a profile list item widget
- $widget: ProfileListItem widget

EndProfileListItemTags: after showing people tags in a profile list item widget
- $widget: ProfileListItem widget

StartActivityObjectOutputAtom: Called at start of Atom XML output generation for ActivityObject chunks, just inside the <activity:object>. Cancel the event to take over its output completely (you're responsible for calling the matching End event if so)
- $obj: ActivityObject
- $out: XMLOutputter to append custom output

EndActivityObjectOutputAtom: Called at end of Atom XML output generation for ActivityObject chunks, just inside the </activity:object>
- $obj: ActivityObject
- $out: XMLOutputter to append custom output

StartActivityObjectOutputJson: Called at start of JSON output generation for ActivityObject chunks: the array has not yet been filled out. Cancel the event to take over its output completely (you're responsible for calling the matching End event if so)
- $obj ActivityObject
- &$out: array to be serialized; you're free to modify it

EndActivityObjectOutputJson: Called at end of JSON output generation for ActivityObject chunks: the array has not yet been filled out.
- $obj ActivityObject
- &$out: array to be serialized; you're free to modify it

StartNoticeWhoGets: Called at start of inbox delivery prep; plugins can schedule notices to go to particular profiles that would otherwise not have reached them. Canceling will take over the entire addressing operation. Be aware that output can be cached or used several times, so should remain idempotent.
- $notice Notice
- &$ni: in/out array mapping profile IDs to constants: NOTICE_INBOX_SOURCE_SUB etc

EndNoticeWhoGets: Called at end of inbox delivery prep; plugins can filter out profiles from receiving inbox delivery here.  Be aware that output can be cached or used several times, so should remain idempotent.
- $notice Notice
- &$ni: in/out array mapping profile IDs to constants: NOTICE_INBOX_SOURCE_SUB etc

StartDefaultLocalNav: When showing the default local nav
- $menu: the menu
- $user: current user

EndDefaultLocalNav: When showing the default local nav
- $menu: the menu
- $user: current user

StartShowAccountProfileBlock: When showing the profile block for an account
- $out: XMLOutputter to append custom output
- $profile: the profile being shown

EndShowAccountProfileBlock: After showing the profile block for an account
- $out: XMLOutputter to append custom output
- $profile: the profile being shown

StartShowGroupProfileBlock: When showing the profile block for a group
- $out: XMLOutputter to append custom output
- $profile: the profile being shown

EndShowGroupProfileBlock: After showing the profile block for a group
- $out: XMLOutputter to append custom output
- $group: the group being shown

StartShowConversation: start the listing of a conversation
- $action: Action object (used mainly as HTMLOutputter)
- $conv: Conversation object, has functions to retrieve relevant notices
- $scoped: Profile for scoping (null if not logged in)

EndShowConversation: after the listing of a conversation
- $action: Action object (used mainly as HTMLOutputter)
- $conv: Conversation object, has functions to retrieve relevant notices
- $scoped: Profile for scoping (null if not logged in)

StartShowThreadedNoticeTail: when showing the replies etc. to a notice
- $nli: parent noticelistitem
- $notice: parent notice
- &$children: list of children

EndShowThreadedNoticeTail: when showing the replies etc. to a notice
- $nli: parent noticelistitem
- $notice: parent notice
- $children: list of children

StartShowThreadedNoticeSub: when showing a reply to a notice
- $nli: parent noticelistitem
- $parent: parent notice
- $child: child notice

EndShowThreadedNoticeSub: when showing a reply to a notice
- $nli: parent noticelistitem
- $parent: parent notice
- $child: child notice

StartAddEmailAddress: when adding an email address through the Web UI
- $user: user getting the new address
- $email: email being added

EndAddEmailAddress: done adding an email address through the Web UI
- $user: user getting the new address
- $email: email being added

StartValidateEmailInvite: when validating an email address for invitations
- $user: user doing the invite
- $email: email address
- &$valid: flag for if it's valid; can be modified

EndValidateEmailInvite: after validating an email address for invitations
- $user: user doing the invite
- $email: email address
- &$valid: flag for if it's valid; can be modified

StartLocalURL: before resolving a local url for an action
- &$action: action to find a path for
- &$paramsi: parameters to pass to the action
- &$fragment: any url fragement
- &$addSession: whether to add session variable
- &$url: resulting URL to local resource

EndLocalURL: before resolving a local url for an action
- &$action: action to find a path for
- &$paramsi: parameters to pass to the action
- &$fragment: any url fragement
- &$addSession: whether to add session variable
- &$url: resulting URL to local resource

StartProfileGetAvatar: When getting an avatar for a profile
- $profile: profile
- $size: size of the avatar
- &$avatar: avatar

EndProfileGetAvatar: After getting an avatar for a profile
- $profile: profile
- $size: size of the avatar
- &$avatar: avatar

StartRegisterSuccess: Before showing the registration success message
- $action: the registration action

StartRegisterSuccess: After showing the registration success message
- $action: the registration action

StartDocFileForTitle: Before searching for a doc or mail template
- $title: Title we're looking for
- &$paths: Paths we're searching
- &$filename: Filename so far (set this if you want)

EndDocFileForTitle: After searching for a doc or mail template
- $title: Title we looked for
- $paths: Paths we searched
- &$filename: Filename so far (set this if you want)

StartReadWriteTables: when noting which tables must be read-write, even on read-only actions
- &$tables: list of table names
- &$rwdb: read-write database URI

EndReadWriteTables: after noting which tables must be read-write, even on read-only actions
- $tables: list of table names
- $rwdb: read-write database URI

StartShowInviteForm: Right before displaying the invitations form
- $action: invitation action

EndShowInviteForm: After displaying the invitations form
- $action: invitation action

StartSendInvitations: Right before sending invitations
- $action: invitation action

EndSendInvitations: Right after sending invitations
- $action: invitation action

StartShowInvitationSuccess: Right before showing invitations success msg
- $action: invitation action

EndShowInvitationSuccess: After showing invitations success msg
- $action: invitation action

StartUpgrade: when starting a site upgrade

EndUpgrade: when ending a site upgrade; good place to do your own upgrades

HaveIMPlugin: is there an IM plugin loaded?
- &$haveIMPlugin: set me to true if you're loaded!

StartShowNoticeOptionItems: Before showing first controls in a notice list item; inside the div
- $nli: NoticeListItem being shown

EndShowNoticeOptionItems: After showing last controls in a notice list item; inside the div
- $nli: NoticeListItem being shown

StartNoticeInScope: Before checking if a notice should be visible to a user
- $notice: The notice to check
- $profile: The profile to check for scope
- &$bResult: The boolean result; fill this in if you want to skip

EndNoticeInScope: After checking if a notice should be visible to a user
- $notice: The notice to check
- $profile: The profile to check for scope
- &$bResult: The boolean result; overwrite this if you so desire

StartNoticeListPrefill: Before pre-filling a list of notices with extra data
- &$notices: Notices to be pre-filled
- $avatarSize: The avatar size for the list

EndNoticeListPrefill: After pre-filling a list of notices with extra data
- &$notices: Notices that were pre-filled
- &$profiles: Profiles that were pre-filled
- $avatarSize: The avatar size for the list

OtherAccountProfiles: Hook to add account profiles to a user account profile block
- $profile: the Profile being shown
- &$others: Modifiable array of profile info arrays. Each one has the following fields:
            href: link to the profile
            text: text for the profile
            image: mini image for the profile

CreateFileImageThumbnailSource: Hook to create image thumbnail source from a File
- $file:    'File' object to source the image from
- &$imgPath: Path to image file which can be used as source for our thumbnail algorithm.
- $media:   MIME media type ('image', 'video', 'audio' etc.)

StartResizeImageFile: Hook to resize an image and output it to a file. No matching End event yet.
- $imagefile: ImageFile object we're resizing.
- $outpath:   string with output filepath
- $box:       array with size ('width', 'height') and boundary box('x', 'y', 'w', 'h').

FillImageFileMetadata: Get more metadata about the ImageFile if it is perhaps not a real local file
- $imagefile    ImageFile object which we're getting metadata for (such as animated status, width/height etc.)

StartShowAttachmentRepresentation: Attachment representation, full file (or in rare cases thumbnails/previews).
- $out:     HTMLOutputter class to use for outputting HTML.
- $file:    'File' object which we're going to show representation for.

EndShowAttachmentRepresentation: Executed after Attachment representation, despite perhaps being unsupported media.
- $out:     HTMLOutputter class to use for outputting HTML.
- $file:    'File' object which we're going to show representation for.

ShowUnsupportedAttachmentRepresentation: Attachment representation, full file (or in rare cases thumbnails/previews).
- $out:     HTMLOutputter class to use for outputting HTML.
- $file:    'File' object which we're going to show representation for.

StartNotifyMentioned: During notice distribution, we send notifications (email, im...) to the profiles who were somehow mentioned.
- $stored:         Notice object that is being distributed.
- &$mentioned_ids: Array of profile IDs (not just for local users) who got mentioned by the notice.

EndNotifyMentioned: During notice distribution, we send notifications (email, im...) to the profiles who were somehow mentioned.
- $stored:         Notice object that is being distributed.
- $mentioned_ids:  Array of profile IDs (not just for local users) who got mentioned by the notice.

StartHomeStubNavItems: Go back Home nav items. Default includes just one item 'home'
- $out:     HTMLOutputter used to output (usually an Action, but not always!)
- &$items:  Referenced array of items in the nav (add if desired)

EndHomeStubNavItems:
- $out:     HTMLOutputter used to output (usually an Action, but not always!)
- $items:   array of menu items

StartSubMenu: Before outputting a submenu (including enclosing tags) to HTML
- $out:     HTMLOutputter used to output (usually an Action, but not always!)
- $menu:    The Menu object outputted as a submenu.
- $label:   Localized text which represents the menu item.

EndSubMenu: After outputting a submenu (including enclosing tags) to HTML
- $out:     HTMLOutputter used to output (usually an Action, but not always!)
- $menu:    The Menu object outputted as a submenu.
- $label:   Localized text which represents the menu item.

StartDocNav: Before outputting the docs Nav
- $nav: The DoclNav widget

EndDocNav: After outputting the docs Nav
- $nav: The DoclNav widget