lib/facebook.rb
# Copyright (C) 2012-2024 Zammad Foundation, https://zammad-foundation.org/
class Facebook
attr_accessor :client, :account
=begin
client = Facebook.new('user_or_page_access_token')
=end
def initialize(access_token)
connect(access_token)
end
=begin
reconnect with other access_token
client.connect('user_or_page_access_token')
=end
def connect(access_token)
@client = Koala::Facebook::API.new(access_token)
end
=begin
disconnect client
client.disconnect
=end
def disconnect
return if !@client
@client = nil
end
=begin
get pages of user
pages = client.pages
result
[
{
id: '12345',
name: 'Some Page Name',
access_token, 'some_access_token_for_page',
},
]
=end
def pages
@client.get_connections('me', 'accounts').map do |page|
{
id: page['id'],
name: page['name'],
access_token: page['access_token']
}
end
end
=begin
get current user
pages = current_user
result
{
'id' => '1234567890123456',
'name' => 'Page/User Name',
'access_token' => 'some_acces_token'
}
=end
def current_user
@client.get_object('me')
end
=begin
get user of comment/post
pages = user(comment_or_post)
result
???
=end
def user(item)
return if !item['from']
return if !item['from']['id']
cache_key = "FB:User:Lookup:#{item['from']['id']}"
cache = Rails.cache.read(cache_key)
return cache if cache
begin
result = @client.get_object(item['from']['id'], fields: 'first_name,last_name,email')
rescue
result = @client.get_object(item['from']['id'], fields: 'name')
end
if result
Rails.cache.write(cache_key, result, { expires_in: 15.minutes })
end
result
end
def to_user(item)
Rails.logger.debug { 'Create user from item...' }
Rails.logger.debug { item.inspect }
# do item_user lookup
item_user = user(item)
return if !item_user
auth = Authorization.find_by(uid: item_user['id'], provider: 'facebook')
# create or update user
user_data = {
image_source: "https://graph.facebook.com/#{item_user['id']}/picture?type=large",
}
if auth
user = User.find(auth.user_id)
user.update!(user_data)
else
user_data[:login] = item_user['id']
if item_user['first_name'] && item_user['last_name']
user_data[:firstname] = item_user['first_name']
user_data[:lastname] = item_user['last_name']
else
user_data[:firstname] = item_user['name']
end
user_data[:active] = true
user_data[:role_ids] = Role.signup_role_ids
user = User.create(user_data)
end
if user_data[:image_source]
avatar = Avatar.add(
object: 'User',
o_id: user.id,
url: user_data[:image_source],
source: 'facebook',
deletable: true,
updated_by_id: user.id,
created_by_id: user.id,
)
# update user link
if avatar && user.image != avatar.store_hash
user.image = avatar.store_hash
user.save
end
end
# create authorization
if !auth
auth_data = {
uid: item_user['id'],
username: item_user['id'],
user_id: user.id,
provider: 'facebook'
}
Authorization.create(auth_data)
end
UserInfo.current_user_id = user.id
user
end
def to_ticket(post, group_id, channel, page)
Rails.logger.debug { 'Create ticket from post...' }
Rails.logger.debug { post.inspect }
Rails.logger.debug { group_id.inspect }
user = to_user(post)
return if !user
# prepare title
title = post['message']
if title.length > 80
title = "#{title[0, 80]}..."
end
state = get_state(page, post)
Ticket.create!(
customer_id: user.id,
title: title,
group_id: group_id,
state: state,
priority: Ticket::Priority.find_by(name: '2 normal'),
preferences: {
channel_id: channel.id,
channel_fb_object_id: page['id'],
facebook: {
permalink_url: post['permalink_url'],
}
},
)
end
def to_article(post, ticket, page)
Rails.logger.debug { 'Create article from post...' }
Rails.logger.debug { post.inspect }
Rails.logger.debug { ticket.inspect }
user = to_user(post)
return if !user
to = nil
if post['to'] && post['to']['data']
post['to']['data'].each do |to_entry|
if to
to += ', '
else
to = ''
end
to += to_entry['name']
end
end
feed_post = {
from: post['from']['name'],
to: to,
body: post['message'],
message_id: post['id'],
type_id: Ticket::Article::Type.find_by(name: 'facebook feed post').id,
}
articles = []
articles.push(feed_post)
if post['comments'] && post['comments']['data']
articles += nested_comments(post['comments']['data'], post['id'])
end
base_url = nil
if ticket.preferences['facebook'] && ticket.preferences['facebook']['permalink_url']
base_url = ticket.preferences['facebook']['permalink_url']
end
articles.each do |article|
next if Ticket::Article.exists?(message_id: article[:message_id])
# set ticket state to open if not new
ticket_state = get_state(page, post, ticket)
if ticket_state.name != ticket.state.name
ticket.state = ticket_state
ticket.save!
end
links = []
if base_url
url = base_url
realtive_id = article[:message_id].split('_')[1]
if realtive_id
url += "?comment_id=#{realtive_id}"
end
links = [
{
url: url,
target: '_blank',
name: 'on Facebook',
},
]
end
article = {
# to: @account['name'],
ticket_id: ticket.id,
internal: false,
sender_id: Ticket::Article::Sender.lookup(name: 'Customer').id,
created_by_id: 1,
updated_by_id: 1,
preferences: {
links: links,
},
}.merge(article)
Ticket::Article.create(article)
end
end
def to_group(post, group_id, channel, page)
Rails.logger.debug { 'import post' }
return if !post['message']
ticket = nil
# use transaction
Transaction.execute(reset_user_id: true, context: 'facebook') do
existing_article = Ticket::Article.find_by(message_id: post['id'])
ticket = if existing_article
existing_article.ticket
else
to_ticket(post, group_id, channel, page)
end
to_article(post, ticket, page)
end
ticket
end
def from_article(article)
post = nil
if article[:type] != 'facebook feed comment'
raise "Can't handle unknown facebook article type '#{article[:type]}'."
end
Rails.logger.debug { 'Create feed comment from article...' }
post = @client.put_comment(article[:in_reply_to], article[:body])
Rails.logger.debug { post.inspect }
@client.get_object(post['id'])
end
private
def get_state(page, post, ticket = nil)
# no changes in post is from page user itself
if post['from'] && post['from']['id'].to_s == page['id'].to_s
if !ticket
return Ticket::State.find_by(name: 'closed')
end
return ticket.state
end
state = Ticket::State.find_by(default_create: true)
return state if !ticket
return ticket.state if ticket.state_id == state.id
Ticket::State.find_by(default_follow_up: true)
end
def access_token_for_page(lookup)
access_token = nil
pages.each do |page|
next if !lookup[:page_id] && !lookup[:page]
next if lookup[:page_id] && lookup[:page_id].to_s != page[:id]
next if lookup[:page] && lookup[:page] != page[:name]
access_token = page[:access_token]
break
end
access_token
end
def nested_comments(comments, in_reply_to)
Rails.logger.debug { 'Fetching nested comments...' }
Rails.logger.debug { comments.inspect }
result = []
return result if comments.blank?
comments.each do |comment|
user = to_user(comment)
next if !user
article_data = {
from: "#{user.firstname} #{user.lastname}",
body: comment['message'],
message_id: comment['id'],
type_id: Ticket::Article::Type.find_by(name: 'facebook feed comment').id,
in_reply_to: in_reply_to
}
result.push(article_data)
sub_comments = @client.get_object("#{comment['id']}/comments", fields: 'id,from,to,message,created_time')
sub_articles = nested_comments(sub_comments, comment['id'])
result += sub_articles
end
result
end
end