commit 3e60c402c9b1da9cba9db645c359fa11ab34defa
Author: Daniel Schubert <mail@schubertdaniel.de>
Date:   Mon Jul 8 17:59:49 2019 +0200

    init

diff --git a/slack-converter.rb b/slack-converter.rb
new file mode 100644
index 0000000..d6187d1
--- /dev/null
+++ b/slack-converter.rb
@@ -0,0 +1,100 @@
+require 'json'
+
+# this class converts the direct messages from a slack export to 
+# a format wich can then be imported by mattermost
+# author Daniel Schubert <mail@schubertdaniel.de>
+
+
+class ImportDMS 
+	def initialize()
+		@dms = {}
+		@users = {}
+
+		self.xtract_users
+		self.xtract_dms
+	end
+	
+	def xtract_users()
+		data = self.read_json('users.json')
+		data.each do |d|
+			@users.store( d["id"], d["name"])
+		end
+	end
+
+	def xtract_dms()
+		data = self.read_json('dms.json')
+		data.each do |d|
+			@dms.store( d["id"],d["members"])
+		end
+	end
+
+	def read_json( file )
+		f = File.open file
+		d = JSON.load f
+	end
+	
+	def get_usr_name( id )
+		unless (id == nil) 
+			@users.fetch(id)
+		end
+	end
+
+	def cnvrt_ts( ts )
+    # converts the slack timestamp to a mattermost timestamp
+		t = ts.sub!(".", "")
+		t[0,13]
+	end
+
+	def get_messages(chat_id)
+		files = Dir.glob("#{chat_id}/*.json")
+		chats = Array.new 
+
+		files.each { |file|
+			f = read_json( file )
+
+			f.each { |m|
+				n = self.get_usr_name( m["user"] )
+				ts = self.cnvrt_ts( m["ts"] )
+				#user,ts, test
+				chats.push( [ts, n, m["text"]] )
+			}
+		}
+
+		return chats
+	end
+
+	def create_json
+		# version; required 		
+		puts '{"type":"version","version":1}'
+		
+    @dms.each_key do |key| 
+      #get user names
+			user_names = []
+			@dms.fetch(key).each do |u_id| 
+				user_names.push( @users.fetch(u_id) )
+			end	  
+      self.create_channel_list
+      self.create_direct_messages
+    end
+	end
+
+  def create_direct_messages
+    #TODO : replies are output as normal messages; should be grouped as replies
+    # create direct messages list
+    m = get_messages(key)
+    m.each do |msg|
+      ml = {"type"=>"direct_post","direct_post"=>{"channel_members" => user_names, "user" => msg[1], "message" => msg[2], "create_at" => msg[0].to_i, "flagged_by" => nil, "reactions" => nil, "replies"=> nil, "attachments"=> nil } }.to_json
+      puts ml
+    end
+  end
+
+  def create_channel_list
+    cl = {"type" => "direct_channel", "direct_channel" => {"members" => user_names, "favorited_by" => nil,"header" => "" }}.to_json
+    puts cl
+  end
+
+end
+
+# usage
+i = ImportDMS.new
+i.create_json