Class: JekyllImport::Importers::WordPress

Inherits:
JekyllImport::Importer show all
Defined in:
lib/jekyll-import/importers/wordpress.rb

Class Method Summary collapse

Methods inherited from JekyllImport::Importer

inherited, run, stringify_keys, subclasses

Class Method Details

.clean_entities(text) ⇒ Object 



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# File 'lib/jekyll-import/importers/wordpress.rb', line 329

def self.clean_entities(text)
  text.force_encoding("UTF-8") if text.respond_to?(:force_encoding)
  text = HTMLEntities.new.encode(text, :named)
  # We don't want to convert these, it would break all
  # HTML tags in the post and comments.
  text.gsub!("&", "&")
  text.gsub!("&lt;", "<")
  text.gsub!("&gt;", ">")
  text.gsub!("&quot;", '"')
  text.gsub!("&apos;", "'")
  text.gsub!("&#47;", "/")
  text
end

.page_path(page_id, page_name_list) ⇒ Object 



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# File 'lib/jekyll-import/importers/wordpress.rb', line 347

def self.page_path(page_id, page_name_list)
  if page_name_list.key?(page_id)
    [
      page_path(page_name_list[page_id][:parent], page_name_list),
      page_name_list[page_id][:slug],
      "/",
    ].join("")
  else
    ""
  end
end

.process(opts) ⇒ Object

Main migrator function. Call this to perform the migration.

dbname

The name of the database

user

The database user name

pass

The database user’s password

host

The address of the MySQL database host. Default: ‘localhost’

port

The port number of the MySQL database. Default: ‘3306’

socket

The database socket’s path

options

A hash table of configuration options.

Supported options are:

:table_prefix

Prefix of database tables used by WordPress. Default: ‘wp_’

:site_prefix

Prefix of database tables used by WordPress Multisite, eg: 2_. Default: ”

:clean_entities

If true, convert non-ASCII characters to HTML entities in the posts, comments, titles, and names. Requires the ‘htmlentities’ gem to work. Default: true.

:comments

If true, migrate post comments too. Comments are saved in the post’s YAML front matter. Default: true.

:categories

If true, save the post’s categories in its YAML front matter. Default: true.

:tags

If true, save the post’s tags in its YAML front matter. Default: true.

:more_excerpt

If true, when a post has no excerpt but does have a <!– more –> tag, use the preceding post content as the excerpt. Default: true.

:more_anchor

If true, convert a <!– more –> tag into two HTML anchors with ids “more” and “more-NNN” (where NNN is the post number). Default: true.

:extension

Set the post extension. Default: “html”

:status

Array of allowed post statuses. Only posts with matching status will be migrated. Known statuses are :publish, :draft, :private, and :revision. If this is nil or an empty array, all posts are migrated regardless of status. Default: [:publish].



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# File 'lib/jekyll-import/importers/wordpress.rb', line 80

def self.process(opts)
  options = {
    :user           => opts.fetch("user", ""),
    :pass           => opts.fetch("password", ""),
    :host           => opts.fetch("host", "127.0.0.1"),
    :port           => opts.fetch("port", "3306"),
    :socket         => opts.fetch("socket", nil),
    :dbname         => opts.fetch("dbname", ""),
    :table_prefix   => opts.fetch("table_prefix", "wp_"),
    :site_prefix    => opts.fetch("site_prefix", nil),
    :clean_entities => opts.fetch("clean_entities", true),
    :comments       => opts.fetch("comments", true),
    :categories     => opts.fetch("categories", true),
    :tags           => opts.fetch("tags", true),
    :more_excerpt   => opts.fetch("more_excerpt", true),
    :more_anchor    => opts.fetch("more_anchor", true),
    :extension      => opts.fetch("extension", "html"),
    :status         => opts.fetch("status", ["publish"]).map(&:to_sym), # :draft, :private, :revision
  }

  if options[:clean_entities]
    begin
      require "htmlentities"
    rescue LoadError
      warn "Could not require 'htmlentities', so the " \
                  ":clean_entities option is now disabled."
      options[:clean_entities] = false
    end
  end

  FileUtils.mkdir_p("_posts")
  FileUtils.mkdir_p("_drafts") if options[:status].include? :draft

  db = Sequel.mysql2(options[:dbname],
                     :user     => options[:user],
                     :password => options[:pass],
                     :socket   => options[:socket],
                     :host     => options[:host],
                     :port     => options[:port],
                     :encoding => "utf8")

  px = options[:table_prefix]
  sx = options[:site_prefix]

  page_name_list = {}

  page_name_query = "
     SELECT
       posts.ID            AS `id`,
       posts.post_title    AS `title`,
       posts.post_name     AS `slug`,
       posts.post_parent   AS `parent`
     FROM #{px}#{sx}posts AS `posts`
     WHERE posts.post_type = 'page'"

  db[page_name_query].each do |page|
    page[:slug] = sluggify(page[:title]) if page.fetch(:slug, "").empty?
    page_name_list[ page[:id] ] = {
      :slug   => page[:slug],
      :parent => page[:parent],
    }
  end

  posts_query = "
     SELECT
       posts.ID            AS `id`,
       posts.guid          AS `guid`,
       posts.post_type     AS `type`,
       posts.post_status   AS `status`,
       posts.post_title    AS `title`,
       posts.post_name     AS `slug`,
       posts.post_date     AS `date`,
       posts.post_date_gmt AS `date_gmt`,
       posts.post_content  AS `content`,
       posts.post_excerpt  AS `excerpt`,
       posts.comment_count AS `comment_count`,
       users.display_name  AS `author`,
       users.user_login    AS `author_login`,
       users.user_email    AS `author_email`,
       users.user_url      AS `author_url`
     FROM #{px}#{sx}posts AS `posts`
       LEFT JOIN #{px}#{sx}users AS `users`
         ON posts.post_author = users.ID"

  if options[:status] && !options[:status].empty?
    status = options[:status][0]
    posts_query << "
     WHERE posts.post_status = '#{status}'"
    options[:status][1..-1].each do |post_status|
      posts_query << " OR
       posts.post_status = '#{post_status}'"
    end
  end

  db[posts_query].each do |post|
    process_post(post, db, options, page_name_list)
  end
end

.process_post(post, db, options, page_name_list) ⇒ Object 



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# File 'lib/jekyll-import/importers/wordpress.rb', line 179

def self.process_post(post, db, options, page_name_list)
  px = options[:table_prefix]
  sx = options[:site_prefix]
  extension = options[:extension]

  title = post[:title]
  title = clean_entities(title) if options[:clean_entities]

  slug = post[:slug]
  slug = sluggify(title) if !slug || slug.empty?

  date = post[:date] || Time.now
  name = format("%02d-%02d-%02d-%s.%s", date.year, date.month, date.day, slug, extension)
  content = post[:content].to_s
  content = clean_entities(content) if options[:clean_entities]

  excerpt = post[:excerpt].to_s

  more_index = content.index(%r/<!-- *more* -->/)
  more_anchor = nil
  if more_index
    if options[:more_excerpt] &&
        (post[:excerpt].nil? || post[:excerpt].empty?)
      excerpt = content[0...more_index]
    end
    if options[:more_anchor]
      more_anchor = "more"
      content.sub!(%r/<!-- *more *-->/,
                   "<a id=\"more\"></a>" \
                   "<a id=\"more-#{post[:id]}\"></a>")
    end
  end

  categories = []
  tags = []

  if options[:categories] || options[:tags]

    cquery =
      "SELECT
         terms.name AS `name`,
         ttax.taxonomy AS `type`
       FROM
         #{px}#{sx}terms AS `terms`,
         #{px}#{sx}term_relationships AS `trels`,
         #{px}#{sx}term_taxonomy AS `ttax`
       WHERE
         trels.object_id = '#{post[:id]}' AND
         trels.term_taxonomy_id = ttax.term_taxonomy_id AND
         terms.term_id = ttax.term_id"

    db[cquery].each do |term|
      if options[:categories] && term[:type] == "category"
        categories << if options[:clean_entities]
                        clean_entities(term[:name])
                      else
                        term[:name]
                      end
      elsif options[:tags] && term[:type] == "post_tag"
        tags << if options[:clean_entities]
                  clean_entities(term[:name])
                else
                  term[:name]
                end
      end
    end
  end

  comments = []

  if options[:comments] && post[:comment_count].to_i.positive?
    cquery =
      "SELECT
         comment_ID           AS `id`,
         comment_author       AS `author`,
         comment_author_email AS `author_email`,
         comment_author_url   AS `author_url`,
         comment_date         AS `date`,
         comment_date_gmt     AS `date_gmt`,
         comment_content      AS `content`
       FROM #{px}#{sx}comments
       WHERE
         comment_post_ID = '#{post[:id]}' AND
         comment_approved != 'spam'"

    db[cquery].each do |comment|
      comcontent = comment[:content].to_s
      comcontent.force_encoding("UTF-8") if comcontent.respond_to?(:force_encoding)
      comcontent = clean_entities(comcontent) if options[:clean_entities]
      comauthor = comment[:author].to_s
      comauthor = clean_entities(comauthor) if options[:clean_entities]

      comments << {
        "id"           => comment[:id].to_i,
        "author"       => comauthor,
        "author_email" => comment[:author_email].to_s,
        "author_url"   => comment[:author_url].to_s,
        "date"         => comment[:date].to_s,
        "date_gmt"     => comment[:date_gmt].to_s,
        "content"      => comcontent,
      }
    end

    comments.sort! { |a, b| a["id"] <=> b["id"] }
  end

  # Get the relevant fields as a hash, delete empty fields and
  # convert to YAML for the header.
  data = {
    "layout"        => post[:type].to_s,
    "status"        => post[:status].to_s,
    "published"     => post[:status].to_s == "draft" ? nil : (post[:status].to_s == "publish"),
    "title"         => title.to_s,
    "author"        => {
      "display_name" => post[:author].to_s,
      "login"        => post[:author_login].to_s,
      "email"        => post[:author_email].to_s,
      "url"          => post[:author_url].to_s,
    },
    "author_login"  => post[:author_login].to_s,
    "author_email"  => post[:author_email].to_s,
    "author_url"    => post[:author_url].to_s,
    "excerpt"       => excerpt,
    "more_anchor"   => more_anchor,
    "wordpress_id"  => post[:id],
    "wordpress_url" => post[:guid].to_s,
    "date"          => date.to_s,
    "date_gmt"      => post[:date_gmt].to_s,
    "categories"    => options[:categories] ? categories : nil,
    "tags"          => options[:tags] ? tags : nil,
    "comments"      => options[:comments] ? comments : nil,
  }.delete_if { |_k, v| v.nil? || v == "" }.to_yaml

  if post[:type] == "page"
    filename = page_path(post[:id], page_name_list) + "index.#{extension}"
    FileUtils.mkdir_p(File.dirname(filename))
  elsif post[:status] == "draft"
    filename = "_drafts/#{slug}.md"
  else
    filename = "_posts/#{name}"
  end

  # Write out the data and content to file
  File.open(filename, "w") do |f|
    f.puts data
    f.puts "---"
    f.puts Util.wpautop(content)
  end
end

.require_deps ⇒ Object 



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# File 'lib/jekyll-import/importers/wordpress.rb', line 6

def self.require_deps
  JekyllImport.require_with_fallback(%w(
    rubygems
    sequel
    fileutils
    safe_yaml
    unidecode
  ))
end

.sluggify(title) ⇒ Object 



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# File 'lib/jekyll-import/importers/wordpress.rb', line 343

def self.sluggify(title)
  title.to_ascii.downcase.gsub(%r![^0-9A-Za-z]+!, " ").strip.tr(" ", "-")
end

.specify_options(c) ⇒ Object 



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# File 'lib/jekyll-import/importers/wordpress.rb', line 16

def self.specify_options(c)
  c.option "dbname",         "--dbname DB",           "Database name. (default: '')"
  c.option "socket",         "--socket SOCKET",       "Database socket. (default: '')"
  c.option "user",           "--user USER",           "Database user name. (default: '')"
  c.option "password",       "--password PW",         "Database user's password. (default: '')"
  c.option "host",           "--host HOST",           "Database host name. (default: 'localhost')"
  c.option "port",           "--port PORT",           "Database port number. (default: '')"
  c.option "table_prefix",   "--table_prefix PREFIX", "Table prefix name. (default: 'wp_')"
  c.option "site_prefix",    "--site_prefix PREFIX",  "Site prefix name. (default: '')"
  c.option "clean_entities", "--clean_entities",      "Whether to clean entities. (default: true)"
  c.option "comments",       "--comments",            "Whether to import comments. (default: true)"
  c.option "categories",     "--categories",          "Whether to import categories. (default: true)"
  c.option "tags",           "--tags",                "Whether to import tags. (default: true)"
  c.option "more_excerpt",   "--more_excerpt",        "Whether to use more excerpt. (default: true)"
  c.option "more_anchor",    "--more_anchor",         "Whether to use more anchor. (default: true)"

  c.option "status",         "--status STATUS,STATUS2", Array,
           "Array of allowed statuses ('publish', 'draft', 'private', 'revision'). (default: ['publish'])"
end