record last sync time

lib/skype_archive/model.rb

@@ -1,12 +1,13 @@
 require "sqlite3"
 require "sequel"
-require "active_support/core_ext"
 require "rest_client"
 require "json"
 require "base64"
 
 module SkypeArchive
   class Model
+    LAST_SYNC_FILE = "/tmp/skype_archive_last_sync"
+
     attr_reader :account_name
 
     def initialize(account_name)
@@ -26,12 +27,13 @@ def search(text, options={})
     end
 
     def sync
-      start_time = Time.now.yesterday.at_beginning_of_day.to_i
-      end_time = Time.now.yesterday.at_midnight.to_i
+      start_time = last_sync_time
+      end_time = Time.now.to_i
       sync_contacts
       sync_conversations
       sync_participants
       sync_messages(start_time, end_time)
+      update_sync_file(end_time)
     end
 
     def sync_contacts
@@ -70,6 +72,20 @@ def sync_messages(start_time=0, end_time=Time.now.to_i)
       end
     end
 
+    def last_sync_time
+      if File.exists?(LAST_SYNC_FILE)
+        File.read(LAST_SYNC_FILE).to_i
+      else
+        Time.now.to_i - 3600 * 24 * 30
+      end
+    end
+
+    def update_sync_file(time)
+      File.open(LAST_SYNC_FILE, 'w') do |file|
+        file.puts time
+      end
+    end
+
     private
       def connection
         @connection ||= Sequel.sqlite(File.expand_path("~/Library/Application\ Support/Skype/#{account_name}/main.db"))