discourse/script/import_scripts/stack_overflow.rb

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# frozen_string_literal: true
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# cf. https://github.com/rails-sqlserver/tiny_tds#install
require "tiny_tds"
require File.expand_path(File.dirname(__FILE__) + "/base.rb")
class ImportScripts::StackOverflow < ImportScripts::Base
BATCH_SIZE ||= 1000
def initialize
super
@client = TinyTds::Client.new(
host: ENV["DB_HOST"],
username: ENV["DB_USERNAME"],
password: ENV["DB_PASSWORD"],
database: ENV["DB_NAME"],
)
end
def execute
SiteSetting.tagging_enabled = true
# TODO: import_groups
import_users
import_posts
import_likes
mark_topics_as_solved
end
def import_users
puts "", "Importing users..."
last_user_id = -1
total = query("SELECT COUNT(*) count FROM Users WHERE Id > 0").first["count"]
batches(BATCH_SIZE) do |offset|
users = query(<<~SQL
SELECT TOP #{BATCH_SIZE}
Id
, UserTypeId
, CreationDate
, LastLoginDate
, LastLoginIP
, Email
, DisplayName
, WebsiteUrl
, RealName
, Location
, Birthday
, ProfileImageUrl
FROM Users
WHERE Id > 0
AND Id > #{last_user_id}
ORDER BY Id
SQL
).to_a
break if users.empty?
last_user_id = users[-1]["Id"]
user_ids = users.map { |u| u["Id"] }
next if all_records_exist?(:users, user_ids)
create_users(users, total: total, offset: offset) do |u|
{
id: u["Id"],
admin: u["UserTypeId"] == 4,
created_at: u["CreationDate"],
last_seen_at: u["LastLoginDate"],
ip_address: u["LastLoginIP"],
email: u["Email"],
username: u["DisplayName"],
website: u["WebsiteUrl"],
name: u["RealName"],
location: u["Location"],
date_of_birth: u["Birthday"],
post_create_action: proc do |user|
if u["ProfileImageUrl"].present?
UserAvatar.import_url_for_user(u["ProfileImageUrl"], user) rescue nil
end
end
}
end
end
end
def import_posts
puts "", "Importing posts..."
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last_post_id = -1
total = query("SELECT COUNT(*) count FROM Posts WHERE PostTypeId IN (1,2,3)").first["count"] +
query("SELECT COUNT(*) count FROM PostComments WHERE PostId IN (SELECT Id FROM Posts WHERE PostTypeId IN (1,2,3))").first["count"]
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batches(BATCH_SIZE) do |offset|
posts = query(<<~SQL
SELECT TOP #{BATCH_SIZE}
Id
, PostTypeId
, CreationDate
, Body
, OwnerUserId AS UserId
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, Title
, Tags
, DeletionDate
, ParentId
, IsAcceptedAnswer
, CASE WHEN (ClosedDate IS NOT NULL OR LockedDate IS NOT NULL) THEN 1 ELSE 0 END AS Closed
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FROM Posts
WHERE PostTypeId IN (1,2,3)
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AND Id > #{last_post_id}
ORDER BY Id
SQL
).to_a
break if posts.empty?
last_post_id = posts[-1]["Id"]
post_ids = posts.map { |p| p["Id"] }
comments = query(<<~SQL
SELECT CONCAT('Comment-', Id) AS Id
, PostId AS ParentId
, Text
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, CreationDate
, UserId
FROM PostComments
WHERE PostId IN (#{post_ids.join(",")})
ORDER BY Id
SQL
).to_a
posts_and_comments = (posts + comments).sort_by { |p| p["CreationDate"] }
post_and_comment_ids = posts_and_comments.map { |p| p["Id"] }
next if all_records_exist?(:posts, post_and_comment_ids)
create_posts(posts_and_comments, total: total, offset: offset) do |p|
raw = p["Body"].present? ? HtmlToMarkdown.new(p["Body"]).to_markdown : p["Text"]
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post = {
id: p["Id"],
created_at: p["CreationDate"],
raw: raw,
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user_id: user_id_from_imported_user_id(p["UserId"]) || -1,
}
if p["Title"].present?
post[:wiki] = p["PostTypeId"] = 3
post[:title] = p["Title"]
post[:tags] = p["Tags"].split("|")
post[:deleted_at] = p["DeletionDate"]
post[:closed] = p["Closed"] == 1
elsif t = topic_lookup_from_imported_post_id(p["ParentId"])
post[:custom_fields] = { is_accepted_answer: true } if p["IsAcceptedAnswer"]
post[:topic_id] = t[:topic_id]
post[:reply_to_post_number] = t[:post_number]
else
puts "", "", "#{p["Id"]} was not imported", "", ""
next
end
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post
end
end
end
def import_likes
puts "", "Importing post likes..."
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last_like_id = -1
batches(BATCH_SIZE) do |offset|
likes = query(<<~SQL
SELECT TOP #{BATCH_SIZE}
Id
, PostId
, UserId
, CreationDate
FROM Posts2Votes
WHERE VoteTypeId = 2
AND DeletionDate IS NULL
AND Id > #{last_like_id}
ORDER BY Id
SQL
).to_a
break if likes.empty?
last_like_id = likes[-1]["Id"]
likes.each do |l|
next unless user_id = user_id_from_imported_user_id(l["UserId"])
next unless post_id = post_id_from_imported_post_id(l["PostId"])
next unless user = User.find_by(id: user_id)
next unless post = Post.find_by(id: post_id)
PostActionCreator.like(user, post) rescue nil
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end
end
puts "", "Importing comment likes..."
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last_like_id = -1
total = query("SELECT COUNT(*) count FROM Comments2Votes WHERE VoteTypeId = 2 AND DeletionDate IS NULL").first["count"]
batches(BATCH_SIZE) do |offset|
likes = query(<<~SQL
SELECT TOP #{BATCH_SIZE}
Id
, CONCAT('Comment-', PostCommentId) AS PostCommentId
, UserId
, CreationDate
FROM Comments2Votes
WHERE VoteTypeId = 2
AND DeletionDate IS NULL
AND Id > #{last_like_id}
ORDER BY Id
SQL
).to_a
break if likes.empty?
last_like_id = likes[-1]["Id"]
likes.each do |l|
next unless user_id = user_id_from_imported_user_id(l["UserId"])
next unless post_id = post_id_from_imported_post_id(l["PostCommentId"])
next unless user = User.find_by(id: user_id)
next unless post = Post.find_by(id: post_id)
PostActionCreator.like(user, post) rescue nil
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end
end
end
def mark_topics_as_solved
puts "", "Marking topics as solved..."
DB.exec <<~SQL
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INSERT INTO topic_custom_fields (name, value, topic_id, created_at, updated_at)
SELECT 'accepted_answer_post_id', pcf.post_id, p.topic_id, p.created_at, p.created_at
FROM post_custom_fields pcf
JOIN posts p ON p.id = pcf.post_id
WHERE pcf.name = 'is_accepted_answer'
SQL
end
def query(sql)
@client.execute(sql)
end
end
ImportScripts::StackOverflow.new.perform