require "mysql2"
require File.expand_path(File.dirname(__FILE__) + "/base.rb")
# Call it like this:
# RAILS_ENV=production ruby script/import_scripts/mybb.rb
class ImportScripts::MyBB < ImportScripts::Base
MYBB_DB = "mybb_db"
TABLE_PREFIX = "mybb_"
BATCH_SIZE = 1000
def initialize
super
@client = Mysql2::Client.new(
host: "localhost",
username: "root",
#password: "",
database: MYBB_DB
)
end
def execute
import_users
import_categories
import_posts
import_private_messages
suspend_users
end
def import_users
puts '', "creating users"
total_count = mysql_query("SELECT count(*) count
FROM #{TABLE_PREFIX}users u
JOIN #{TABLE_PREFIX}usergroups g ON g.gid = u.usergroup
WHERE g.title != 'Banned';").first['count']
batches(BATCH_SIZE) do |offset|
results = mysql_query(
"SELECT uid id, email email, username, regdate, g.title `group`
FROM #{TABLE_PREFIX}users u
JOIN #{TABLE_PREFIX}usergroups g ON g.gid = u.usergroup
WHERE g.title != 'Banned'
ORDER BY u.uid ASC
LIMIT #{BATCH_SIZE}
OFFSET #{offset};")
break if results.size < 1
next if all_records_exist? :users, results.map {|u| u["id"].to_i}
create_users(results, total: total_count, offset: offset) do |user|
{ id: user['id'],
email: user['email'],
username: user['username'],
created_at: Time.zone.at(user['regdate']),
moderator: user['group'] == 'Super Moderators',
admin: user['group'] == 'Administrators' }
end
end
end
def import_categories
results = mysql_query("
SELECT fid id, pid parent_id, left(name, 50) name, description
FROM #{TABLE_PREFIX}forums
ORDER BY pid ASC, fid ASC
")
create_categories(results) do |row|
h = {id: row['id'], name: CGI.unescapeHTML(row['name']), description: CGI.unescapeHTML(row['description'])}
if row['parent_id'].to_i > 0
h[:parent_category_id] = category_id_from_imported_category_id(row['parent_id'])
end
h
end
end
def import_posts
puts "", "creating topics and posts"
total_count = mysql_query("SELECT count(*) count from #{TABLE_PREFIX}posts").first["count"]
batches(BATCH_SIZE) do |offset|
results = mysql_query("
SELECT p.pid id,
p.tid topic_id,
t.fid category_id,
t.subject title,
t.firstpost first_post_id,
p.uid user_id,
p.message raw,
p.dateline post_time
FROM #{TABLE_PREFIX}posts p,
#{TABLE_PREFIX}threads t
WHERE p.tid = t.tid
ORDER BY p.dateline
LIMIT #{BATCH_SIZE}
OFFSET #{offset};
")
break if results.size < 1
next if all_records_exist? :posts, results.map {|m| m['id'].to_i}
create_posts(results, total: total_count, offset: offset) do |m|
skip = false
mapped = {}
# If you have imported a phpbb forum to mybb previously there might
# be a problem with #{TABLE_PREFIX}threads.firstpost. If these ids are wrong
# the thread cannot be imported to discourse as the topic post is
# missing. This query retrieves the first_post_id manually. As it
# will decrease the performance it is commented out by default.
# m['first_post_id'] = mysql_query("
# SELECT p.pid id,
# FROM #{TABLE_PREFIX}posts p,
# #{TABLE_PREFIX}threads t
# WHERE p.tid = #{m['topic_id']} AND t.tid = #{m['topic_id']}
# ORDER BY p.dateline
# LIMIT 1
# ").first['id']
mapped[:id] = m['id']
mapped[:user_id] = user_id_from_imported_user_id(m['user_id']) || -1
mapped[:raw] = process_mybb_post(m['raw'], m['id'])
mapped[:created_at] = Time.zone.at(m['post_time'])
if m['id'] == m['first_post_id']
mapped[:category] = category_id_from_imported_category_id(m['category_id'])
mapped[:title] = CGI.unescapeHTML(m['title'])
else
parent = topic_lookup_from_imported_post_id(m['first_post_id'])
if parent
mapped[:topic_id] = parent[:topic_id]
else
puts "Parent post #{m['first_post_id']} doesn't exist. Skipping #{m["id"]}: #{m["title"][0..40]}"
skip = true
end
end
skip ? nil : mapped
end
end
end
def import_private_messages
puts "", "private messages are not implemented"
end
def suspend_users
puts '', "banned users are not implemented"
end
# Discourse usernames don't allow spaces
def convert_username(username, post_id)
count = 0
username.gsub!(/\s+/) { |a| count += 1; '_' }
# Warn on MyBB bug that places post text in the quote line - http://community.mybb.com/thread-180526.html
if count > 5
puts "Warning: probably incorrect quote in post #{post_id}"
end
return username
end
# Take an original post id and return the migrated topic id and post number for it
def post_id_to_post_num_and_topic(quoted_post_id, post_id)
quoted_post_id_from_imported = post_id_from_imported_post_id(quoted_post_id.to_i)
if quoted_post_id_from_imported
begin
post = Post.find(quoted_post_id_from_imported)
return "post:#{post.post_number}, topic:#{post.topic_id}"
rescue
puts "Could not find migrated post #{quoted_post_id_from_imported} quoted by original post #{post_id} as #{quoted_post_id}"
return ""
end
else
puts "Original post #{post_id} quotes nonexistent post #{quoted_post_id}"
return ""
end
end
def process_mybb_post(raw, import_id)
s = raw.dup
# convert the quote line
s.gsub!(/\[quote='([^']+)'.*?pid='(\d+).*?\]/) {
"[quote=\"#{convert_username($1, import_id)}, " + post_id_to_post_num_and_topic($2, import_id) + '"]'
}
# :) is encoded as <!-- s:) --><img src="{SMILIES_PATH}/icon_e_smile.gif" alt=":)" title="Smile" /><!-- s:) -->
s.gsub!(/<!-- s(\S+) -->(?:.*)<!-- s(?:\S+) -->/, '\1')
# Some links look like this: <!-- m --><a class="postlink" href="http://www.onegameamonth.com">http://www.onegameamonth.com</a><!-- m -->
s.gsub!(/<!-- \w --><a(?:.+)href="(\S+)"(?:.*)>(.+)<\/a><!-- \w -->/, '[\2](\1)')
# Many phpbb bbcode tags have a hash attached to them. Examples:
# [url=https://google.com:1qh1i7ky]click here[/url:1qh1i7ky]
# [quote="cybereality":b0wtlzex]Some text.[/quote:b0wtlzex]
s.gsub!(/:(?:\w{8})\]/, ']')
# Remove mybb video tags.
s.gsub!(/(^\[video=.*?\])|(\[\/video\]$)/, '')
s = CGI.unescapeHTML(s)
# phpBB shortens link text like this, which breaks our markdown processing:
# [http://answers.yahoo.com/question/index ... 223AAkkPli](http://answers.yahoo.com/question/index?qid=20070920134223AAkkPli)
#
# Work around it for now:
s.gsub!(/\[http(s)?:\/\/(www\.)?/, '[')
s
end
def mysql_query(sql)
@client.query(sql, cache_rows: false)
end
end
ImportScripts::MyBB.new.perform