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# Mobius Forensic Toolkit
# Copyright (C) 2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019 Eduardo Aguiar
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
import pymobius.util
import sqlite3
import mobius

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# @brief Load data from formhistory.sqlite file
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def decode (path):
  db = sqlite3.connect (path)
  form_history = decode_form_history (db)
  db.close ()

  return form_history

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# @brief Retrieve data from formhistory.sqlite table
# Tested versions:
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def decode_form_history (db):
  
  # check moz_formhistory table schema
  stmt = '''SELECT *
              FROM moz_formhistory
             LIMIT 1'''

  cursor = db.cursor ()
  cursor.execute (stmt)
  cols = set (d[0] for d in cursor.description)
  
  # call function according to columns available
  if len (cols) == 3:		# cols = (id, fieldname, value)
    return decode_form_history_01 (db)

  else:
    return decode_form_history_14 (db)

# =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
# @brief Retrieve data from formhistory.sqlite table
# Tested versions:
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def decode_form_history_01 (db):
  form_history = []
  
  stmt = '''
       SELECT id,
              fieldname,
              value
         FROM moz_formhistory'''

  cursor = db.cursor ()

  for row in cursor.execute (stmt):
    entry = pymobius.Data ()
    entry.id = row[0]
    entry.fieldname = row[1]
    entry.value = row[2]
    entry.use_count = None
    entry.first_used_time = None
    entry.last_used_time = None
    
    form_history.append (entry)
    
  return form_history

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# @brief Retrieve data from formhistory.sqlite table
# Tested versions: 14.0.1, 50.0.2, 53.0.2, 59.0.2
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def decode_form_history_14 (db):
  form_history = []
  
  stmt = '''
       SELECT id,
              fieldname,
              value,
              timesused,
              firstused,
              lastused
         FROM moz_formhistory'''

  cursor = db.cursor ()

  for row in cursor.execute (stmt):
    entry = pymobius.Data ()
    entry.id = row[0]
    entry.fieldname = row[1]
    entry.value = row[2]
    entry.use_count = row[3]
    entry.first_used_time = mobius.datetime.new_datetime_from_unix_timestamp (row[4] // 1000000)
    entry.last_used_time = mobius.datetime.new_datetime_from_unix_timestamp (row[5] // 1000000)
    
    form_history.append (entry)
    
  return form_history
