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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
package plugin
import (
"net/http"
"github.com/mattermost/mattermost-server/model"
)
// These assignments are part of the wire protocol. You can add more, but should not change existing
// assignments. Follow the naming convention of <HookName>Id as the autogenerated glue code depends on that.
const (
OnActivateId = 0
OnDeactivateId = 1
ServeHTTPId = 2
OnConfigurationChangeId = 3
ExecuteCommandId = 4
MessageWillBePostedId = 5
MessageWillBeUpdatedId = 6
MessageHasBeenPostedId = 7
MessageHasBeenUpdatedId = 8
UserHasJoinedChannelId = 9
UserHasLeftChannelId = 10
UserHasJoinedTeamId = 11
UserHasLeftTeamId = 12
ChannelHasBeenCreatedId = 13
TotalHooksId = iota
)
// Methods from the Hooks interface can be used by a plugin to respond to events. Methods are likely
// to be added over time, and plugins are not expected to implement all of them. Instead, plugins
// are expected to implement a subset of them and pass an instance to plugin/rpcplugin.Main, which
// will take over execution of the process and add default behaviors for missing hooks.
type Hooks interface {
// OnActivate is invoked when the plugin is activated.
OnActivate() error
// Implemented returns a list of hooks that are implmented by the plugin.
// Plugins do not need to provide an implementation. Any given will be ignored.
Implemented() ([]string, error)
// OnDeactivate is invoked when the plugin is deactivated. This is the plugin's last chance to
// use the API, and the plugin will be terminated shortly after this invocation.
OnDeactivate() error
// OnConfigurationChange is invoked when configuration changes may have been made.
OnConfigurationChange() error
// ServeHTTP allows the plugin to implement the http.Handler interface. Requests destined for
// the /plugins/{id} path will be routed to the plugin.
//
// The Mattermost-User-Id header will be present if (and only if) the request is by an
// authenticated user.
ServeHTTP(c *Context, w http.ResponseWriter, r *http.Request)
// ExecuteCommand executes a command that has been previously registered via the RegisterCommand
// API.
ExecuteCommand(c *Context, args *model.CommandArgs) (*model.CommandResponse, *model.AppError)
// MessageWillBePosted is invoked when a message is posted by a user before it is committed
// to the database. If you also want to act on edited posts, see MessageWillBeUpdated.
// Return values should be the modified post or nil if rejected and an explanation for the user.
//
// If you don't need to modify or reject posts, use MessageHasBeenPosted instead.
//
// Note that this method will be called for posts created by plugins, including the plugin that
// created the post.
MessageWillBePosted(c *Context, post *model.Post) (*model.Post, string)
// MessageWillBeUpdated is invoked when a message is updated by a user before it is committed
// to the database. If you also want to act on new posts, see MessageWillBePosted.
// Return values should be the modified post or nil if rejected and an explanation for the user.
// On rejection, the post will be kept in its previous state.
//
// If you don't need to modify or rejected updated posts, use MessageHasBeenUpdated instead.
//
// Note that this method will be called for posts updated by plugins, including the plugin that
// updated the post.
MessageWillBeUpdated(c *Context, newPost, oldPost *model.Post) (*model.Post, string)
// MessageHasBeenPosted is invoked after the message has been committed to the database.
// If you need to modify or reject the post, see MessageWillBePosted
// Note that this method will be called for posts created by plugins, including the plugin that
// created the post.
MessageHasBeenPosted(c *Context, post *model.Post)
// MessageHasBeenUpdated is invoked after a message is updated and has been updated in the database.
// If you need to modify or reject the post, see MessageWillBeUpdated
// Note that this method will be called for posts created by plugins, including the plugin that
// created the post.
MessageHasBeenUpdated(c *Context, newPost, oldPost *model.Post)
// ChannelHasBeenCreated is invoked after the channel has been committed to the database.
ChannelHasBeenCreated(c *Context, channel *model.Channel)
// UserHasJoinedChannel is invoked after the membership has been committed to the database.
// If actor is not nil, the user was invited to the channel by the actor.
UserHasJoinedChannel(c *Context, channelMember *model.ChannelMember, actor *model.User)
// UserHasLeftChannel is invoked after the membership has been removed from the database.
// If actor is not nil, the user was removed from the channel by the actor.
UserHasLeftChannel(c *Context, channelMember *model.ChannelMember, actor *model.User)
// UserHasJoinedTeam is invoked after the membership has been committed to the database.
// If actor is not nil, the user was added to the team by the actor.
UserHasJoinedTeam(c *Context, teamMember *model.TeamMember, actor *model.User)
// UserHasLeftTeam is invoked after the membership has been removed from the database.
// If actor is not nil, the user was removed from the team by the actor.
UserHasLeftTeam(c *Context, teamMember *model.TeamMember, actor *model.User)
}
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