<?php

/* Transaction management */

function nb_transactions() {
  global $trans;

  return count($trans);
}

function get_all_transactions() {
  global $trans;

  return $trans;
}

function test_day($a, $b) {
  if ($a["day"] == $b["day"])
    return 0;
  elseif ($a["day"] > $b["day"])
    return 1;
  else
    return -1;
}

function test_amount($a, $b) {
  if ($a["amount"] == $b["amount"])
    return 0;
  elseif ($a["amount"] > $b["amount"])
    return 1;
  else
    return -1;
}

function test_account($a, $b) {
  return strcmp(get_account($a["accid"]), get_account($b["accid"]));
}

function test_category($a, $b) {
  return strcmp(get_category($a["catid"]), get_category($b["catid"]));
}

function test_description($a, $b) {
  return strcmp($a["description"], $b["description"]);
}

function get_transaction($id) {
  global $trans;

  if (count($trans))
    foreach ($trans as $t)
      if ($t["id"] == $id)
        return $t["description"];

  return "";
}

function get_transaction_maxlength() {
  global $trans;

  $maxlength = 0;
  if (count($trans))
    foreach ($trans as $t)
      if (strlen($t["description"]) > $maxlength)
        $maxlength = strlen($t["description"]);

  return $maxlength;
}

function add_transaction($day, $accid, $catid, $amount, $desc) {
  global $trans;
  global $yearmonth;
 
  if (strftime("%Y%m%d", strtotime(sprintf("%s%02d", $yearmonth, $day))) != sprintf("%s%02d", $yearmonth, $day))
    return false;

  if ($accid < 0)
    return false;
 
  if ($catid <= 0)
    $catid = 0;

  if ($amount == 0)
    return false;

  $id = "";
  if (count($trans))
    foreach ($trans as $t)
      if ($t["id"] > $id)
        $id = $t["id"];

  $trans[] = array("id" => ++$id, "day" => $day, "accid" => $accid,
		   "catid" => $catid, "amount" => $amount,
		   "description" => $desc);

  return store_transaction($id);
}

function modify_transaction_day($id, $day) {
  global $trans;
  global $yearmonth;
 
  if (strftime("%Y%m%d", strtotime(sprintf("%s%02d", $yearmonth, $day))) != sprintf("%s%02d", $yearmonth, $day))
    return false;
   
  if (count($trans))
    foreach ($trans as $key => $t)
      if ($t["id"] == $id) {
	$trans[$key]["day"] = $day;
	return store_transaction($id);
      }

  return false;
}

function modify_transaction_amount($id, $amount) {
  global $trans;
  global $yearmonth;

  if ($amount == 0)
    return false;
   
  if (count($trans))
    foreach ($trans as $key => $t)
      if ($t["id"] == $id) {
	$trans[$key]["amount"] = $amount;
	return store_transaction($id);
      }

  return false;
}

function modify_transaction_account($id, $accid) {
  global $trans;
  global $yearmonth;

  if ($accid < 0)
    return false;
   
  if (count($trans))
    foreach ($trans as $key => $t)
      if ($t["id"] == $id) {
	$trans[$key]["accid"] = $accid;
	return store_transaction($id);
      }

  return false;
}

function modify_transaction_category($id, $catid) {
  global $trans;
  global $yearmonth;

  if ($catid < 0)
    $catid = 0;
   
  if (count($trans))
    foreach ($trans as $key => $t)
      if ($t["id"] == $id) {
	$trans[$key]["catid"] = $catid;
	return store_transaction($id);
      }

  return false;
}

function modify_transaction_description($id, $desc) {
  global $trans;
  global $yearmonth;
  
  if (count($trans))
    foreach ($trans as $key => $t)
      if ($t["id"] == $id) {
	$trans[$key]["description"] = $desc;
	return store_transaction($id);
      }

  return false;
}

function delete_transaction($id) {
  global $trans;
  
  if (count($trans))
    foreach ($trans as $key => $t)
      if ($t["id"] == $id) {
	unset($trans[$key]);
	return store_transaction($id);
      }

  return false;
}

function move_transaction($id, $move_yearmonth) {
  global $trans;
  global $yearmonth;

  if ($yearmonth == $move_yearmonth)
    return false;

  if (count($trans))
    foreach ($trans as $key => $t)
      if ($t["id"] == $id) {
	if (copy_transaction($t["day"], $t["accid"], $t["catid"], $t["amount"],
			     $t["description"], $move_yearmonth)) {
	  unset($trans[$key]);
	  return store_transaction($id);
	}
	else
	  return false;
      }

  return false;
}

/* Initialization */

include($lib_dir.$db_type."/transaction.php");

?>