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DEV: Slack import script (#22386)
It's very simple import script and currently imports only the following content:
* Users
* Messages as Discourse topics/posts
* Attachments
Each channel can be mapped to a category and tags. It uses regular expressions to convert formatted messages ("rich text") into Markdown used by Discourse. In the future we could convert the `blocks` attribute from each message into Markdown instead of applying regular expressions on the `text` attribute.
This commit is contained in:
Gerhard Schlager
GitHub
parent
ce0ddfba8c
commit
e09ce99884
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@ -4,7 +4,7 @@ require "sqlite3"
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module ImportScripts
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class GenericDatabase
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def initialize(directory, batch_size:, recreate: false, numeric_keys: false)
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def initialize(directory, batch_size: 1000, recreate: false, numeric_keys: false)
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filename = "#{directory}/index.db"
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File.delete(filename) if recreate && File.exist?(filename)
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@ -42,8 +42,8 @@ module ImportScripts
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def insert_user(user)
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@db.execute(<<-SQL, prepare(user))
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INSERT OR REPLACE
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INTO user (id, email, username, name, bio, avatar_path, created_at, last_seen_at, active)
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VALUES (:id, :email, :username, :name, :bio, :avatar_path, :created_at, :last_seen_at, :active)
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INTO user (id, email, username, name, bio, avatar_path, created_at, last_seen_at, active, staged, admin)
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VALUES (:id, :email, :username, :name, :bio, :avatar_path, :created_at, :last_seen_at, :active, :staged, :admin)
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SQL
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end
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@ -61,8 +61,8 @@ module ImportScripts
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@db.transaction do
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@db.execute(<<-SQL, prepare(topic))
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INSERT OR REPLACE INTO topic (id, title, raw, category_id, closed, user_id, created_at, url, upload_count)
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VALUES (:id, :title, :raw, :category_id, :closed, :user_id, :created_at, :url, :upload_count)
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INSERT OR REPLACE INTO topic (id, title, raw, category_id, closed, user_id, created_at, url, upload_count, tags)
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VALUES (:id, :title, :raw, :category_id, :closed, :user_id, :created_at, :url, :upload_count, :tags)
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SQL
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attachments&.each do |attachment|
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@ -150,6 +150,28 @@ module ImportScripts
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SQL
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end
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def calculate_user_last_seen_at_dates
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@db.execute <<~SQL
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UPDATE user
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SET last_seen_at = (
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SELECT MAX(created_at)
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FROM post
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WHERE post.user_id = user.id
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)
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SQL
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end
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def calculate_user_created_at_dates
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@db.execute <<~SQL
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UPDATE user
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SET created_at = (
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SELECT MIN(created_at)
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FROM post
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WHERE post.user_id = user.id
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)
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SQL
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end
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def fetch_categories
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@db.execute(<<-SQL)
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SELECT *
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@ -325,6 +347,48 @@ module ImportScripts
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@db.get_first_value(sql)
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end
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def create_missing_topics
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posts = @db.execute(<<~SQL)
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WITH missing_topics AS (SELECT *, RANK() OVER ( PARTITION BY topic_id ORDER BY created_at ) AS post_number
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FROM post p
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WHERE NOT EXISTS (SELECT 1 FROM topic t WHERE t.id = p.topic_id))
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SELECT *
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FROM missing_topics
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WHERE post_number = 1
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SQL
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posts.each do |post|
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@db.execute("DELETE FROM post WHERE id = ?", post["id"])
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topic = post.except("post_number", "reply_to_post_id")
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topic["id"] = topic.delete("topic_id")
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topic = yield(topic)
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@db.execute(<<-SQL, prepare(topic))
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INSERT OR REPLACE INTO topic (id, title, raw, category_id, closed, user_id, created_at, url, upload_count, tags)
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VALUES (:id, :title, :raw, :category_id, :closed, :user_id, :created_at, :url, :upload_count, :tags)
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SQL
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@db.execute("DELETE FROM post WHERE id = ?", post["id"])
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@db.execute(<<-SQL, topic_id: topic["id"], post_id: post["id"])
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INSERT OR REPLACE INTO topic_upload (topic_id, path)
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SELECT :topic_id, path
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FROM post_upload
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WHERE post_id = :post_id
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SQL
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@db.execute("DELETE FROM post_upload WHERE post_id = ?", post["id"])
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@db.execute(<<-SQL, topic_id: topic["id"], post_id: post["id"])
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UPDATE like
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SET topic_id = :topic_id,
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post_id = NULL
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WHERE post_id = :post_id
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SQL
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end
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end
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private
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def configure_database
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@ -382,7 +446,9 @@ module ImportScripts
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avatar_path TEXT,
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created_at DATETIME,
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last_seen_at DATETIME,
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active BOOLEAN NOT NULL DEFAULT true
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active BOOLEAN NOT NULL DEFAULT true,
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staged BOOLEAN NOT NULL DEFAULT false,
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admin BOOLEAN NOT NULL DEFAULT false
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)
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SQL
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@ -400,7 +466,8 @@ module ImportScripts
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user_id #{key_data_type} NOT NULL,
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created_at DATETIME,
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url TEXT,
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upload_count INTEGER DEFAULT 0
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upload_count INTEGER DEFAULT 0,
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tags JSON
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)
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SQL
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@ -486,6 +553,8 @@ module ImportScripts
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hash[key] = value ? 1 : 0
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elsif value.is_a?(Date)
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hash[key] = value.to_s
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elsif value.is_a?(Time)
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hash[key] = value.utc.iso8601
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end
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end
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end
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299
script/import_scripts/slack.rb
Normal file
299
script/import_scripts/slack.rb
Normal file
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@ -0,0 +1,299 @@
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# frozen_string_literal: true
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require "colored2"
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require_relative "base"
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require_relative "base/generic_database"
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# Minimal Slack importer
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# It imports users and messages into Discourse topics/posts
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# Call it like this:
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# IMPORT=1 bundle install
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# IMPORT=1 bundle exec ruby script/import_scripts/slack.rb "PATH_TO_SLACK_EXPORT"
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#
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# You will need to create a channels-mapping.json file in order to map Slack channels to Discourse categories and tags.
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# The import script will create a template for you if you don't have one.
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class ImportScripts::Slack < ImportScripts::Base
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TITLE_TIMEZONE = "America/Los_Angeles"
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def initialize(base_path)
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super()
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@base_path = base_path
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@db = ImportScripts::GenericDatabase.new(@base_path, recreate: true)
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end
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def execute
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@channel_mapping = load_channel_mapping
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read_json_files
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import_users
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import_categories
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import_topics
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import_posts
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end
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private
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def read_json_files
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puts "", "Reading JSON files..."
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json_from_file("users.json").each do |user|
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next if user[:deleted]
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@db.insert_user(
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id: user[:id],
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email: user[:profile][:email],
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name: user[:real_name],
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staged: !user[:is_email_confirmed],
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admin: user[:is_admin],
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avatar_path: user[:profile][:image_original],
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)
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end
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@channel_mapping.each do |mapping|
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@db.insert_category(id: mapping[:slack_channel], name: mapping[:discourse_category])
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json_from_directory(mapping[:slack_channel]).each do |message|
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raise "Unknown type: #{message[:type]}" if message[:type] != "message"
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topic_id = message[:thread_ts] || message[:ts]
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created_at = Time.at(message[:ts].to_f).in_time_zone(TITLE_TIMEZONE)
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attachments = message[:files]&.map { |file| file[:url_private_download] }
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if message[:ts] == topic_id
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@db.insert_topic(
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id: topic_id,
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title: "Thread starting at #{created_at.iso8601}",
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raw: message[:text].presence || "No text",
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category_id: mapping[:slack_channel],
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created_at: message[:ts],
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user_id: message[:user],
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tags: Oj.dump(mapping[:discourse_tags]),
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attachments: attachments,
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)
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else
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@db.insert_post(
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id: message[:client_msg_id],
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raw: message[:text].presence || "No text",
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topic_id: topic_id,
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created_at: message[:ts],
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user_id: message[:user],
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attachments: attachments,
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)
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end
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end
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@db.create_missing_topics do |topic|
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created_at = Time.at(topic["created_at"].to_f).in_time_zone(TITLE_TIMEZONE)
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topic[:title] = "Thread starting at #{created_at.iso8601}"
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topic[:category_id] = mapping[:slack_channel]
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topic[:tags] = Oj.dump(mapping[:discourse_tags])
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topic
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end
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end
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@db.calculate_user_created_at_dates
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@db.calculate_user_last_seen_at_dates
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@db.sort_posts_by_created_at
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end
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def import_categories
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puts "", "Creating categories..."
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rows = @db.fetch_categories
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create_categories(rows) { |row| { id: row["id"], name: row["name"] } }
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end
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def import_users
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puts "", "Creating users..."
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total_count = @db.count_users
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last_id = ""
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batches do |offset|
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rows, last_id = @db.fetch_users(last_id)
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break if rows.empty?
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next if all_records_exist?(:users, rows.map { |row| row["id"] })
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create_users(rows, total: total_count, offset: offset) do |row|
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{
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id: row["id"],
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email: row["email"].presence || fake_email,
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name: row["name"],
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created_at: row["created_at"],
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last_seen_at: row["last_seen_at"],
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active: row["active"] == 1,
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staged: row["staged"] == 1,
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admin: row["admin"] == 1,
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merge: true,
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post_create_action:
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proc do |user|
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if row["avatar_path"].present?
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begin
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UserAvatar.import_url_for_user(row["avatar_path"], user)
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rescue StandardError
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nil
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end
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end
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end,
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}
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end
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end
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end
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def import_topics
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puts "", "Creating topics..."
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total_count = @db.count_topics
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last_id = ""
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batches do |offset|
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rows, last_id = @db.fetch_topics(last_id)
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break if rows.empty?
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next if all_records_exist?(:posts, rows.map { |row| row["id"] })
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create_posts(rows, total: total_count, offset: offset) do |row|
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user_id = user_id_from_imported_user_id(row["user_id"]) || Discourse.system_user.id
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attachments = @db.fetch_topic_attachments(row["id"]) if row["upload_count"] > 0
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{
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id: row["id"],
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title: row["title"].present? ? row["title"].strip[0...255] : "Topic title missing",
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raw: to_markdown(row["raw"], attachments, user_id),
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category: category_id_from_imported_category_id(row["category_id"]),
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user_id: user_id,
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created_at: Time.at(row["created_at"].to_f),
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tags: Oj.load(row["tags"]),
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}
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end
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end
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end
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def import_posts
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puts "", "creating posts"
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total_count = @db.count_posts
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last_row_id = 0
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batches do |offset|
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rows, last_row_id = @db.fetch_sorted_posts(last_row_id)
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break if rows.empty?
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next if all_records_exist?(:posts, rows.map { |row| row["id"] })
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create_posts(rows, total: total_count, offset: offset) do |row|
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topic = topic_lookup_from_imported_post_id(row["topic_id"])
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user_id = user_id_from_imported_user_id(row["user_id"]) || Discourse.system_user.id
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attachments = @db.fetch_post_attachments(row["id"]) if row["upload_count"] > 0
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{
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id: row["id"],
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raw: to_markdown(row["raw"], attachments, user_id),
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user_id: user_id,
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topic_id: topic[:topic_id],
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created_at: Time.at(row["created_at"].to_f),
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}
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end
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end
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end
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def json_from_file(relative_path)
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absolute_path = File.join(@base_path, relative_path)
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load_json(absolute_path)
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end
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def json_from_directory(directory)
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base_path = File.join(@base_path, directory)
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raise "Directory #{base_path} does not exist" unless File.directory?(base_path)
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Enumerator.new do |y|
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# Don't use Dir[] because it allocates an array with the path of every file it finds
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# which can use a huge amount of memory!
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IO.popen(["find", base_path, "-name", "*.json"]) do |io|
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io.each_line do |path|
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path.chomp!
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load_json(path).each { |item| y.yield(item) }
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end
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end
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end
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end
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def load_json(path)
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raise "File #{path} does not exist" unless File.exist?(path)
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Oj.load(File.read(path), { mode: :strict, symbol_keys: true })
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end
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def load_channel_mapping
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path = File.join(@base_path, "channel-mapping.json")
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if !File.exist?(path)
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create_channel_mapping_file(path)
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puts "", "ERROR: channel-mapping.json is missing".red
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puts "An example file has been created at #{path}".red, "Please edit it and try again.".red
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exit 1
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end
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load_json(path)
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end
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def create_channel_mapping_file(mapping_file_path)
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mapping =
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Dir[File.join(@base_path, "/*/")].map do |path|
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channel = File.basename(path)
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{ slack_channel: channel, discourse_category: channel, discourse_tags: [] }
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end
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File.write(mapping_file_path, Oj.dump(mapping, indent: 4))
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end
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def to_markdown(text, attachments, user_id)
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# Emoji skin tones
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text.gsub!(/::skin-tone-(\d):/, ':t\1:')
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# Mentions
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text.gsub!(/<@(\w+)>/) do
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user_id = $1
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username = @lookup.find_username_by_import_id(user_id)
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username ? "@#{username}" : "`@#{user_id}`"
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end
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# Links
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text.gsub!(%r{<(https?://[^|]+?)\|([^>]+?)>}, '[\2](\1)')
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text.gsub!(%r{<(https?://[^>]+?)>}, '\1')
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# Code blocks
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text.gsub!(/```(.+?)```/m, "```\n\\1\n```")
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# Images and files
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if attachments
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attachments.each do |attachment|
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upload_markdown = download_file(attachment["path"], user_id)
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text << "\n#{upload_markdown}"
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end
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end
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text
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end
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def download_file(url, user_id)
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uri = URI.parse(url)
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filename = File.basename(uri.path)
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tempfile =
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FileHelper.download(
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url,
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max_file_size: SiteSetting.max_image_size_kb.kilobytes,
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tmp_file_name: "sso-avatar",
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follow_redirect: true,
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)
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return unless tempfile
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upload = UploadCreator.new(tempfile, filename, origin: url).create_for(user_id)
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html_for_upload(upload, filename)
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ensure
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tempfile.close! if tempfile && tempfile.respond_to?(:close!)
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end
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end
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ImportScripts::Slack.new(ARGV[0]).perform
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