a new bespoke importer, feel free to borrow ideas

script/import_scripts/bespoke_1.rb

@@ -0,0 +1,282 @@
+# bespoke importer for a customer, feel free to borrow ideas
+#
+#
+require 'csv'
+require File.expand_path(File.dirname(__FILE__) + "/base.rb")
+
+# Call it like this:
+#   RAILS_ENV=production bundle exec ruby script/import_scripts/bespoke_1.rb
+class ImportScripts::Bespoke < ImportScripts::Base
+
+  BATCH_SIZE = 1000
+
+  def initialize(path)
+    @path = path
+    super()
+    @bbcode_to_md = true
+
+    puts "loading post mappings..."
+    @post_number_map = {}
+    Post.pluck(:id, :post_number).each do |post_id, post_number|
+      @post_number_map[post_id] = post_number
+    end
+  end
+
+  def created_post(post)
+    @post_number_map[post.id] = post.post_number
+    super
+  end
+
+  def execute
+    import_users
+    import_categories
+    import_posts
+
+  end
+
+  class RowResolver
+    def load(row)
+      @row = row
+    end
+
+    def self.create(cols)
+      Class.new(RowResolver).new(cols)
+    end
+
+    def initialize(cols)
+      cols.each_with_index do |col,idx|
+        self.class.send(:define_method, col) do
+          @row[idx]
+        end
+      end
+    end
+  end
+
+  def load_user_batch!(users, offset, total)
+    if users.length > 0
+      create_users(users, offset: offset, total: total) do |user|
+        user
+      end
+      users.clear
+    end
+  end
+
+  def csv_parse(name)
+    filename = "#{@path}/#{name}.csv"
+    first = true
+    row = nil
+
+    current_row = "";
+    double_quote_count = 0
+
+    File.open(filename).each_line do |line|
+
+      # escaping is mental here
+      line.gsub!(/\\(.{1})/){|m| m[-1] == '"'? '""': m[-1]}
+      line.strip!
+
+      current_row << "\n" unless current_row.empty?
+      current_row << line
+
+      double_quote_count += line.scan('"').count
+
+      if double_quote_count % 2 == 1
+        next
+      end
+
+      raw = begin
+              CSV.parse(current_row)
+            rescue CSV::MalformedCSVError => e
+              puts e.message
+              puts "*" * 100
+              puts "Bad row skipped, line is: #{line}"
+              puts
+              puts current_row
+              puts
+              puts "double quote count is : #{double_quote_count}"
+              puts "*" * 100
+
+              current_row = ""
+              double_quote_count = 0
+              next
+            end[0]
+
+      if first
+        row = RowResolver.create(raw)
+
+        current_row = ""
+        double_quote_count = 0
+        first = false
+        next
+      end
+
+      row.load(raw)
+
+      yield row
+
+      current_row = ""
+      double_quote_count = 0
+    end
+  end
+
+  def total_rows(table)
+    File.foreach("#{@path}/#{table}.csv").inject(0) {|c, line| c+1} - 1
+  end
+
+  def import_users
+    puts "", "creating users"
+
+    count = 0
+    users = []
+
+    total = total_rows("users")
+
+    csv_parse("users") do |row|
+
+      id = row.id
+      email = row.email
+
+      # fake it
+      if row.email.blank? || row.email !~ /@/
+        email = SecureRandom.hex << "@domain.com"
+      end
+
+      name = row.display_name
+      username = row.key_custom
+      created_at = DateTime.parse(row.dcreate)
+
+      username = name if username == "NULL"
+
+      users << {
+        id: id,
+        email: email,
+        name: name,
+        username: username,
+        created_at: created_at
+      }
+
+      count += 1
+      if count % BATCH_SIZE == 0
+        load_user_batch! users, count - users.length, total
+      end
+
+    end
+
+    load_user_batch! users, count, total
+  end
+
+  def import_categories
+    rows = []
+    csv_parse("categories") do |row|
+      rows << {id: row.id, name: row.name, description: row.description}
+    end
+
+    create_categories(rows) do |row|
+      row
+    end
+  end
+
+  def normalize_raw!(raw)
+    # purple and #1223f3
+    raw.gsub!(/\[color=[#a-z0-9]+\]/i, "")
+    raw.gsub!(/\[\/color\]/i, "")
+    raw.gsub!(/\[signature\].+\[\/signature\]/i,"")
+    raw
+  end
+
+  def import_post_batch!(posts, topics, offset, total)
+      create_posts(posts, total: total, offset: offset) do |post|
+
+        mapped = {}
+
+        mapped[:id] = post[:id]
+        mapped[:user_id] = user_id_from_imported_user_id(post[:user_id]) || -1
+        mapped[:raw] = post[:body]
+        mapped[:created_at] = post[:created_at]
+
+        topic = topics[post[:topic_id]]
+
+        unless topic[:post_id]
+          mapped[:category] = category_from_imported_category_id(topic[:category_id]).try(:name)
+          mapped[:title] = post[:title]
+          topic[:post_id] = post[:id]
+        else
+          parent = topic_lookup_from_imported_post_id(topic[:post_id])
+          mapped[:topic_id] = parent[:topic_id]
+
+          reply_to_post_id = post_id_from_imported_post_id(post[:reply_id])
+          if reply_to_post_id
+            reply_to_post_number = @post_number_map[reply_to_post_id]
+            if reply_to_post_number
+              mapped[:reply_to_post_number] = reply_to_post_number
+            end
+          end
+        end
+
+        return nil if topic[:deleted] or post[:deleted]
+
+        mapped
+      end
+
+      posts.clear
+  end
+
+  def import_posts
+    puts "", "creating topics and posts"
+
+    topic_map = {}
+
+    csv_parse("topics") do |topic|
+      topic_map[topic.id] = {
+        id: topic.id,
+        category_id: topic.forum_category_id,
+        deleted: topic.is_deleted.to_i == 1,
+        locked: topic.is_locked.to_i == 1,
+        pinned: topic.is_pinned.to_i == 1
+      }
+    end
+
+    total = total_rows("posts")
+
+    posts = []
+    count = 0
+    csv_parse("posts") do |row|
+
+      unless row.dcreate
+        puts "NO CREATION DATE FOR POST"
+        p row
+        next
+      end
+
+      row = {
+        id: row.id,
+        topic_id: row.forum_topic_id,
+        reply_id: row.reply_id,
+        user_id: row.user_id,
+        title: row.title,
+        body: normalize_raw!(row.body),
+        deleted: row.is_deleted.to_i == 1,
+        created_at: DateTime.parse(row.dcreate)
+      }
+      posts << row
+      count+=1
+
+      if posts.length > 0 && posts.length % BATCH_SIZE == 0
+        import_post_batch!(posts, topic_map, count - posts.length, total)
+      end
+    end
+
+    import_post_batch!(posts, topic_map, count - posts.length, total) if posts.length > 0
+
+    exit
+  end
+
+
+end
+
+unless ARGV[0] && Dir.exist?(ARGV[0])
+  puts "", "Usage:", "", "bundle exec ruby script/import_scripts/bespoke_1.rb DIRNAME", ""
+  exit 1
+end
+
+ImportScripts::Bespoke.new(ARGV[0]).perform